Resource Request Method, Station, and Central Access Point

CROSS-REFERENCE TO RELATED APPLICATION

1) This application claims the priority of a Chinese patent application No. 201110081288.6 filed on Mar. 31, 2011 and titled “COMMUNICATION METHOD”, which is incorporated herein by reference in its entirety.

2) This application claims the priority of a Chinese patent application No. 201110130194.3 filed on May 19, 2011 and titled “COMMUNICATION SYSTEM”, which is incorporated herein by reference in its entirety.

3) This application claims the priority of a Chinese patent application No. 201110188594.X filed on Jul. 6, 2011 and titled “METHOD, DEVICE AND SYSTEM USED FOR RESOURCE REQUEST”, which is incorporated herein by reference in its entirety.

4) This application claims the priority of a Chinese patent application No. 201210027898.2 filed on Feb. 8, 2012 and titled “METHOD AND DEVICE USED FOR RESOURCE REQUEST”, which is incorporated herein by reference in its entirety.

5) This application claims the priority of a Chinese patent application No. 201210041628.7 filed on Feb. 21, 2012 and titled “A Method used for Resource Request, Station and Central Access Point”, which is incorporated herein by reference in its entirety.

FIELD OF THE INVENTION

This invention belongs to the technical field of wireless communication, especially related to a method used for resource request and apparatus.

BACKGROUND OF THE INVENTION

Over the recent years, wireless network technology include the wireless LAN technique WiFi that is based on the 802.11 standard, the Bluetooth system that is based on the 802.15 standard, the Femto technique that is directed to indoor applications and derived from the mobile communication system, etc.

The 802.11-based WiFi technique is currently the most widely used wireless network transmission technology. It is principally applied to wireless local area network environment, application scenarios with room predominate, may also be applied to an outdoor environment. 802.11 system evolves into 802.11a and 802.11g based on OFDM technology form initial 802.11b CDMA-based transmission mechanism. Although, in the latest IEEE 802.11n-2009 standard, enabling 802.11n physical peak rate attainable 600 Mbps by introducing multi-antenna (MIMO) technology, but typically MAC (Media Access Control) layer throughput only reaches to the maximum of 300 Mbps. So for conventional WLAN systems, MAC layer design of a single-user access network based on CSMA/CA (Carrier Sense Multiple Access with Collision Avoidance) is bottleneck of network performance. Thus, although existing Wi-Fi techniques provide user with cheap access way to some degree, but is hard to accommodate current and future rapid development of high rate multimedia traffic demands.

Femto technique based on 3GPP standard is a kind of new technology for indoor coverage evolved from mobile communication system, Femto technique based on 3G system employs CDMA transmission scheme, LTE or WiMAX system-oriented Femto techniques employ OFDM transmission scheme. This multiple access mechanism by time, frequency, codeword allocated for different users mutually orthogonal access resource contention, it is substantially different from competition-based CSMA/CA access. However Femto techniques derive from mobile communication system oriented 3G/LTE/WiMAX system. Since 3G/LTE/WiMAX system primarily apply to wide area coverage mobile communication scenario, system characteristics for short-range wireless communication scenario is not optimized. Meanwhile, strict requirement of synchronization in complicated upper layer protocol design and PHY layer based 3G/LTE/WiMAX, Results in equipment cost cannot be cheap as 802.11, that is also main reason why Femto technique have not been widely used at present.

With increasingly rapid development of multimedia service application requirements, in order to meet demand for wireless communication, there is a need to present a more suitable implementation.

SUMMARY OF THE INVENTION

The technical problem to be solved in this invention is to provide a method for resource request, station and central access point (CAP) and thus ask for the resource required by uplink data transmission.

This Invention provides a resource request method, by using associated resource request method, including:

Carry the transmission resource request in data frame;

Send the indicated data frame carrying the transmission resource request.

This Invention provides another resource request method, by using associated resource request method, including:

Receive data frame, which carries the transmission resource request;

Analy the indicated transmission resource request from the indicated data frame;

Assign transmission resource for the indicated STA, according to the indicated transmission resource request;

Send the transmission resource response, which carries the transmission resource instruction, to the indicated STA;

This Invention provides a STA, used for resource request, by using associated resource request method, including:

Encapsulation module, used to carry the transmission resource request in data frame;

The first sending module, used to send the indicated data frame carrying the transmission resource request.

This Invention provides a CAP, used for resource request, by using associated resource request method, including:

Receiving module, used to receive data frame which carries the transmission resource request;

Analysis module, used to analyze the indicated transmission resource request from the indicated data frame;

Resource allocation module, used to allocate transmission resource for STA according to the indicated transmission resource request;

Sending module, used to send the transmission resource response, which carries the transmission resource instruction, to the indicated corresponding STA.

The type of method, station, and CAP for resource request aims to obtain the resource required by uplink data transmission.

BRIEF DESCRIPTION OF THE DRAWING

FIG. 1 is a flow chart of a method for resource request provided by the first embodiment example of this invention;

FIG. 2 is a flow diagram of a method for generating scheduling request sequence provided by the embodiment of this invention;

FIG. 3 is a principle diagram of PN sequence generator provided by the embodiment of this invention;

FIG. 4 is a schematic diagram of frame structure for independent resource request provided by the embodiment of this invention;

FIG. 5 is a structural representation of STA used for resource request in a competitive way according to a first embodiment of the invention;

FIG. 6 is a structural representation of CAP used for resource request in a competitive way according to a first embodiment of the invention;

FIG. 7 is a schematic flow chart of a method for resource request in a associated way according to a second embodiment of the invention;

FIG. 8 is a structural representation of STA used for resource request in a associated way according to a second embodiment of the invention;

FIG. 9 is a structural representation of CAP used for resource request in a associated way according to a second embodiment of the invention;

FIG. 10 is a schematic flow chart of a method for resource request in a polling way according to a third embodiment of the invention;

FIG. 11 is a structural representation of CAP used for resource request in a polling way according to a third embodiment of the invention;

FIG. 12 is a schematic flow chart of a method for resource request in a polling way according to a fourth embodiment of the invention;

FIG. 13 is a structural representation of CAP used for resource request in a polling way according to a fourth embodiment of the invention;

FIG. 14 is a schematic flow chart of a method for resource request in a polling way according to a fifth embodiment of the invention;

FIG. 15 is a structural representation of CAP used for resource request in a polling way according to a fifth embodiment of the invention;

FIG. 16 is a schematic flow chart of a method for resource request in a polling way according to a sixth embodiment of the invention;

FIG. 17 is a structural representation of CAP used for resource request in a polling way according to a sixth embodiment of the invention.

DETAILED DESCRIPTION OF THE INVENTION

The description below and accompanying drawings fully illustrate specific embodiments of the invention, to enable one skilled in the art to implement the embodiments. Modifications, such as structural, logical, electrical and process modifications, can be made in other embodiments. The embodiments only represent some possible variations. Individual components or functions are optional and the operation order is variable, unless it is otherwise stated specifically. A part and certain feature of some embodiments may be included in or replaced by a part and certain feature of other embodiment. The scope of the embodiments of the invention includes the whole scope of the claims and all obtainable equivalents thereof. Herein, these embodiments of the invention may be individually or generally represented by the term “invention” for the sake of convenience; moreover, if more than one invention is disclosed actually, it is not intended automatically to limit the application scope to any individual invention or inventive concept.

First Embodiment Example

The First Embodiment Example of this Invention provides a resource request method that the station (STA, Station) in need of uplink data transmission sends transmission resource request actively to the central access point (CAP, Central Access Point) to obtain uplink data transmission in a competitive manner. CAP is the entity which provides access service for the accessed stations; while STA containing media access control (MAC) and physical layer (PHY) functional interfaces is the terminal equipment able to communicate with CAP. The resource request method in the First Embodiment Example is shown in FIG. 1, including the following steps:

Step S101: STA sends the first transmission resource request;

Step S102: CAP receives the indicated first transmission resource request and assigns the first transmission resource to the indicated STA;

Step S103: the indicated CAP sends the first transmission resource response, which carries the first transmission resource instruction, to the indicated STA;

Step S104: the indicated STA receives the first transmission resource response;

Step S105: the indicated STA sends the second transmission resource request by using the first transmission resource;

Step S106: the indicated CAP receives the second transmission resource request and assigns the second transmission resource to the indicated STA;

Step S107: the indicated CAP sends the second transmission resource response, which carries the second transmission resource instruction, to the indicated STA;

Step S108: the indicated STA receives the second transmission resource response;

Step S109: the indicated STA transmits data by using the indicated second transmission resource.

With the resource request method in the First Embodiment Example of this Invention, STA sends transmission resource request to CAP actively and it is through two interaction, namely, STA sends the first transmission resource request to trigger the resource request process and obtain the first transmission resource, then STA sends the second transmission resource request by using the first transmission resource to obtain the second transmission resource used for the uplink data transmission, that the whole resource request process completes and the resource required by the uplink data transmission is obtained.

Preferably, the indicated first transmission resource request can be initiated via uplink scheduling. Certainly, in another embodiment, the indicated first transmission resource request can be initiated via other means, like via the unoccupied uplink transmission resource, or it can be loaded in the uplink data frame and sent with the data frame. There's no hard limit in this Invention. Further information on the initiation of the first transmission resource request via scheduling used in this embodiment will be offered below.

The indicated first transmission resource request can be a scheduling request sequence specifically. After receiving the scheduling request sequence equal to the first transmission resource request, CAP will include the index of the indicated scheduling request sequence, the frequency domain cyclic shift parameter index of the indicated scheduling request sequence, transmission position of the indicated scheduling request sequence in the uplink scheduling request channel as well as the system frame number sent by the indicated scheduling request sequence. Based on the index of indicated scheduling request sequence, the frequency domain cyclic shift parameter index of the indicated scheduling request sequence, transmission position of the indicated scheduling request sequence in the uplink scheduling request channel and the system frame number sent by the indicated scheduling request sequence, STA will determine to receive the first transmission resource response corresponding to the indicated scheduling request sequence.

Certainly, in another embodiment, the indicated first transmission resource request can adopt other approaches and there's no hard limit in this Invention. Further explanation on designing of the scheduling request sequence serving as the first transmission resource request used in this embodiment will be offered below.

Multiple scheduling request sequences which serve as the first transmission resource request can be designed at first. When transmitting the first transmission resource request, STA can choose one from these indicated scheduling request sequences as the first transmission resource request according to predefined rules. The selection method can be set up as needed, for example, by probability.

When design the scheduling request sequence identifiers, the optional scheduling request sequences which serve as the first transmission resource request can be numbered in index form, then use the numbers as identifiers. Other approaches can also be adopted to identify different scheduling request sequences and there's no hard limit in this Invention.

A specific method of generating scheduling request sequence is provided in the First Embodiment Example of this Invention, as shown in FIG. 2, including the following steps: generating PN sequence, constellation labeling, subcarrier mapping, generating cyclic shift sequence, inverse fast fourier transform (FFT, Inverse Fast Fourier Transform) and adding CP. In FIG. 2, CAP_MAC means the MAC address of CAP should be 7 bits at least, i the PN sequence index (0≦i<4), {δ_cs} the cyclic shift parameter set and j the cyclic shift parameter index (0≦j<8).

The Step of generating PN sequence can be achieved in the way shown in FIG. 3, i.e. PN sequence uses the linear feedback shift register sequence at the maximum length calculated by using the generating polynomial 1+X¹¹+X¹⁵. The initial value of the register is r_init=[00101011r₆r₅r₄r₃r₂r₁r₀]_b, with MSB on the left and LSB on the right; in which, [r₆r₅r₄r₃r₂r₁r₀]_b=CAP_MAC, equal to 7 bits, the lowest MAC address of CAP.

The Step of constellation labeling can be achieved with Binary Phase Shift Keying (BPSK) modulation method. As shown in Table 1, after BPSK modulation the sequence S_iwill get the sequence C_i.

TABLE 1

Input Bit
I Channel
Q Channel

(b₀)
Output
Output

0
−1
0

1
1
0

In the Step of subcarrier mapping, the sequence C_ican get the sequence M_ias per the following formula.

$M_{i, k} = {\begin{matrix} C_{i, k + 112} & if - 112 \leq k < 0 \\ C_{i, k + 111} & if 1 \leq k < 113 \\ 0 & otherwise \end{matrix}$

In the Step of generating cyclic shift sequence, the sequence M_iafter subcarrier mapping can get the sequence T_i^jas per the following formula.

$T_{i, k}^{j} = M_{i, k} e^{- j \frac{2 π k δ_{CS}^{j}}{N_{IFFT}}}$

In which, N_IFFTstands for the points of IFFT,

$k \in [- \frac{N_{IFFT}}{2}, \frac{N_{IFFT}}{2} - 1],$

δ_cs^jmeans the cyclic shift parameter using sampling points as a apparatus, for a 20 MHz system, N_IFFT=256, {δ_cs}={0 32 64 96 128 160 192 224}.

Then, conduct IFFT and add CP to the cyclic shift sequence T_i^jto acquire the scheduling request sequence. By this way 32 scheduling request sequences can be acquired. After that, use the indicated scheduling request sequence to launch the competitive resource request.

Certainly, other methods can be used to generate scheduling request sequence in another embodiment, and there's no hard limit in this Invention.

After that, STA may send the first transmission resource request out from the uplink scheduling request channel.

In the First Embodiment Example of this Invention, the first transmission resource request is transmitted wisely through the uplink scheduling request channel to complete the resource request process in a competitive way. It's unnecessary to monitor if the uplink transmission channel has resources available and even without the uplink transmission resource the resource request can also be conducted. Certainly, in another embodiment the indicated first transmission resource request can be launched via other channels like the uplink transmission channel, and there's no hard limit in this Invention.

In the First Embodiment Example of this Invention where the first transmission resource request is launched from the uplink scheduling request channel, the indicated scheduling request sequence can be designed to correspond to the position of OFDM symbol in uplink scheduling request channel in order to mark the transmission position of the indicated scheduling request sequence. Certainly, in another embodiment the transmission position of the scheduling request sequence could also be marked in other ways, and there is no hard limit in this Invention.

When the first transmission resource request is sent from the uplink scheduling request channel, the first transmission resource request can be modulated to the uplink scheduling request channel by means of BPSK, QPSK and so on as needed.

Preferably, after assigning the first transmission resource for the indicated STA, the indicated CAP can issue the resource allocation instruction via transmission control channel. That is to say, the indicated CAP could launch the first transmission resource response from the transmission control channel, carrying the first transmission resource instruction. Accordingly, the indicated STA would receive the indicated first transmission resource response in the indicated transmission control channel to get the first transmission resource. Certainly, the first transmission resource response is issued via other channels in another embodiment, and there's no hard limit in this Invention.

Preferably, after assigning the first transmission resource for the indicated STA, the indicated CAP can sent the indicated first transmission resource response in the form of broadcasting. When using broadcasting to send the first transmission resource response, the indicated STA will receive the correspondent response as per predefined rules. When using the scheduling request sequence to trigger the uplink resource request, STA can receive the first transmission resource response corresponding to the indicated scheduling request sequence in accordance with the scheduling request sequence index used when sending the scheduling request sequence, the frequency domain cyclic shift parameter index of the indicated scheduling request sequence, transmission position of the indicated scheduling request sequence in the uplink scheduling request channel and the system frame number sent by the indicated scheduling request channel.

A specific format of the first transmission resource response is given in the First Embodiment Example as shown in Table 2.

TABLE 2

Frame Resource Allocation for Resource Request

Bit
Definition

b₃b₂b₁b₀
Broadcasting type

b₃b₂b₁b₀= 0110, independent resource request frame (assign resource for

the independent resource request frame)

b₇b₆b₅b₄
Reservation

b₂₃b₂₂. . . b₈
b₉b₈= 00, corresponding to the scheduling request from the first OFDM

allocation 1
symbol of UL-SRCH

b₉b₈= 01, corresponding to the scheduling request from the second

OFDM symbol of UL-SRCH

b₉b₈= 10, corresponding to the scheduling request from the third OFDM

symbol of UL-SRCH

b₉b₈= 11, corresponding to the scheduling request from the fourth OFDM

symbol of UL-SRCH

b₁₁b₁₀, PN sequence index, domain value: 0~3

b₁₄b₁₃b₁₂, PN sequence frequency domain cyclic shift parameter index

A cyclic shift of 0 for 000, 32 for 001 . . . 224 for 111.

b₁₇b₁₆b₁₅, an instruction that the system frame number of the occurrent

scheduling request is 3 bit at minimum.

b₂₃b₂₂. . . b₁₈, the original position index of the resource assigned for the

scheduling request in the signaling/feedback channel, with a scope of

1~63 for domain value in which 0 refers to invalid instruction.

b₃₉b₃₈. . . b₂₄
b₂₅b₂₄, the same definition as b₉b₈.

allocation 2
b₂₇b₂₆, PN sequence index, domain value: 0~3

b₃₀b₂₉b₂₈, PN sequence frequency domain cyclic shift parameter index

A cyclic shift of 0 for 000, 32 for 001 . . . 224 for 111.

b₃₃b₃₂b₃₁, an instruction that the system frame number of the occurrent

scheduling request is 3 bit at minimum.

b₃₉b₃₈. . . b₃₄, the original position index of the resource assigned for the

scheduling request in the signaling/feedback channel, with a scope of

1~63 for domain value in which 0 refers to invalid instruction.

b₅₅b₅₄. . . b₄₀
b₄₁b₄₀, the same definition as b₉b₈.

allocation 3
b₄₃b₄₂, PN sequence index, domain value: 0~3.

b₄₆b₄₅b₄₄, PN sequence frequency domain cyclic shift parameter index.

A cyclic shift of 0 for 000, 32 for 001 . . . 224 for 111.

b₄₉b₄₈b₄₇, an instruction that the system frame number of the occurrent

scheduling request is 3 bit at minimum.

b₅₅b₅₄. . . b₅₀, the original position index of the resource assigned for the

scheduling request in the signaling/feedback channel, with a scope of

1~63 for domain value in which 0 refers to invalid instruction.

b₇₁b₇₀. . . b₅₆
16 bit CRC scrambled by BSTAID

Preferably, a format for the second transmission resource request is provided in the First Embodiment Example of this Invention, aiming to support the requested resource based on service flow report. Thereinto, the indicated second transmission resource request includes the identifier of STA, which launches the indicated second transmission resource request and amounts to the bandwidth resource size requested by each service flow in single or multiple service flows, along with identifiers of each service flow. By means of analyzing the indicated second transmission resource request, CAP can learn each service flow of the indicated STA and the resource request of each indicated service flow.

Preferably, the indicated second transmission resource request may also include the bandwidth resource requested for each service flow. CAP allows STA to choose the requested bandwidth resource type specific to different service flow, making the resource request more flexible and humanized.

The optional bandwidth resource types include:

Increment bandwidth indicates, when assigning second transmission resource for the service flow, the bandwidth resource size that increases or decreases in current request of the indicated service flow comparing to the bandwidth resource size already assigned for the indicated service flow.

Total bandwidth indicates, when assigning second transmission resource for the service flow, using the bandwidth resource size in current request of the indicated service flow to replace the bandwidth resource size already assigned for the indicated service flow.

Preferably, another format for the second transmission resource request is provided in the First Embodiment Example of this Invention, aiming to support the requested resource based on STA report. Thereinto, the indicated second transmission resource request includes the identifier of STA, which launches the indicated second transmission resource request, along with the total bandwidth resource size requested by the indicated STA.

Preferably, the indicated second transmission resource request may also include the bandwidth resource requested by the indicated STA. CAP allows STA to choose the requested bandwidth resource type as needed, making the resource request more flexible and humanized.

The optional bandwidth resource types include:

Increment bandwidth indicates, when assigning second transmission resource for STA, the bandwidth resource size that increases or decreases in current request of the indicated STA comparing to the bandwidth resource size already assigned for the indicated STA.

Total bandwidth indicates, when assigning second transmission resource for STA, using the bandwidth resource size in current request of the indicated STA to replace the bandwidth resource size already assigned for the indicated STA.

Preferably, a representation method for bandwidth resource is provided in the First Embodiment Example that first design a resource table and then use the index of the indicated bandwidth resource in the preset resource table to indicate the size of requested bandwidth resource. Therefore, when reporting the requested bandwidth resource, only the index value corresponding to the indicated bandwidth resource from the table needs to be carried. Especially when the requested bandwidth resource is huge, using the index value in replace of specific bandwidth resource value would greatly reduce the occupied bits and save transmission resource. For intuitive view, here is a sample resource representation as shown in Table 3.

TABLE 3

Index
Resource Size (Bits)

0
BS = 0

1
1 < BS <= 14

2
15 < BS <= 28

3
29 < BS <= 42

4
43 < BS <= 56

5
57 < BS <= 70

6
71 < BS <= 84

7
85 < BS <= 98

8
99 < BS <= 112

9
113 < BS <= 126

10
127 < BS <= 140

11
141 < BS <= 154

12
155 < BS <= 168

13
169 < BS <= 182

14
183 < BS <= 196

15
197 < BS <= 210

16
211 < BS <= 224

17
225 < BS <= 238

18
239 < BS <= 252

19
253 < BS <= 266

20
267 < BS <= 280

21
281 < BS <= 308

22
309 < BS <= 336

23
337 < BS <= 364

24
365 < BS <= 392

25
393 < BS <= 420

26
421 < BS <= 448

27
449 < BS <= 476

28
477 < BS <= 504

29
505 < BS <= 532

30
533 < BS <= 560

31
561 < BS <= 588

32
589 < BS <= 616

33
617 < BS <= 644

34
645 < BS <= 672

35
673 < BS <= 700

36
701 < BS <= 728

37
729 < BS <= 784

38
785 < BS <= 840

39
841 < BS <= 896

40
897 < BS <= 952

41
953 < BS <= 1008

42
1009 < BS <= 1064

43
1065 < BS <= 1120

44
1121 < BS <= 1176

45
1177 < BS <= 1232

46
1233 < BS <= 1288

47
1289 < BS <= 1344

48
1345 < BS <= 1400

49
1401 < BS <= 1456

50
1457 < BS <= 1512

51
1513 < BS <= 1568

52
1569 < BS <= 1624

53
1625 < RS <= 1680

54
1681 < BS <= 1736

55
1737 < BS <= 1792

56
1793 < BS <= 1904

57
1905 < BS <= 2016

58
2017 < BS <= 2128

59
2129 < BS <= 2240

60
2241 < BS <= 2352

61
2353 < BS <= 2464

62
2465 < BS <= 2576

63
2577 < BS <= 2688

64
2689 < BS <= 2800

65
2801 < BS <= 2912

66
2913 < BS <= 3024

67
3025 < BS <= 3136

68
3137 < BS <= 3360

69
3361 < BS <= 3584

70
3585 < BS <= 3808

71
3809 < BS <= 4032

72
4033 < BS <= 4256

73
4257 < BS <= 4480

74
4481 < BS <= 4704

75
4705 < BS <= 4928

76
4929 < BS <= 5152

77
5153 < BS <= 5376

78
5377 < BS <= 5600

79
5601 < BS <= 5824

80
5825 < BS <= 6272

81
6273 < BS <= 6720

82
6721 < BS <= 7168

83
7169 < BS <= 7616

84
7617 < BS <= 8064

85
8065 < BS <= 8512

86
8513 < BS <= 8960

87
8961 < BS <= 9408

88
9409 < BS <= 9856

89
9857 < BS <= 10304

90
10305 < BS <= 10752

91
10753 < BS <= 11648

92
11649 < BS <= 12544

93
12545 < BS <= 13440

94
13441 < BS <= 14336

95
14337 < BS <= 15232

96
15233 < BS <= 16128

97
16129 < BS <= 17920

98
17921 < BS <= 19712

99
19713 < BS <= 21504

100
21505 < BS <= 23296

101
23297 < BS <= 25088

102
25089 < BS <= 28672

103
28673 < BS <= 32256

104
32257 < BS <= 35840

105
35841 < BS <= 39424

106
39425 < BS <= 43008

107
43009 < BS <= 50176

108
50177 < BS <= 57344

109
57345 < BS <= 64512

110
64513 < BS <= 71680

111
71681 < BS <= 86016

112
86017 < BS <= 100352

113
100353 < BS <= 114688

114
114689 < BS <= 129024

115
129025 < BS <= 143360

116
143361 < BS <= 172032

117
172033 < BS <= 200704

118
200705 < BS <= 229376

119
229377 < BS <= 258048

120
258049 < BS <= 286720

121
286721 < BS <= 344064

122
344065 < BS <= 458752

123
458753 < BS <= 573440

124
573441 < BS <= 802816

125
802817 < BS <= 1835008

126
1835009 < BS <= 3500000

127
BS > 3500000

Preferably, resource tables with multiple accuracy scopes can be designed as needed. When conducting resource request, choose the proper resource table in line with the requested resource. The identifier and index of the resource table will be loaded in the resource request and the same resource table can be maintained on CAP side. By means of the identifier and index of the received resource request, locate the resource size of the corresponding index in the relevant resource table and learn the resource size requested by STA.

In the First Embodiment Example of this Invention, the indicated second transmission resource request can be sent after encapsulating into independent resource request frame. Taking the aforementioned method on the basis of service flow report for example, this embodiment provides a specific independent resource request frame structure, as shown in FIG. 4, including frame header, frame body and frame check sequence (FCS, Frame Check Sequence). The frame header contains frame control information, such as frame type (management control in this case), subtype (independent resource request frame in this case), version information and so on; the frame body contains STAID, the number of FID, and single or multiple FID message blocks which comprise service flow identifiers and resource index each. In which, the resource index belongs to the index of requested bandwidth resource in the resource table. In addition, if different resource types are available for allocation, for example, both increment bandwidth and total bandwidth are allowed, then an instruction on the requested resource type can be set up in the bandwidth resource request of the indicated service flow.

Also, in the body of the independent resource request frame designed in this Invention, STAID field accounts for 12 bit, FID number field 4 bit, and FCS field 32 bit. In which, each FID message block accounts for 16 bit, including 4 bit FID field, 4 bit reserved field, 7 bit resource index field and 1 bit reserved field. By this way the reading is conducted per byte, making the process simpler.

If using the STA report-based method as above, only frame body of the independent resource request frame shown in FIG. 4 needs to be changed, and the STAID and resource index can be encapsulated in the frame body. Besides, if resource tables of multiple accuracy scopes are adopted, the resource table type field can be set up in the frame body and instructions are no longer described here.

After assigning the second transmission resource for the indicated STA, the indicated CAP can send the indicated second transmission resource response via unicasting, with the second transmission resource instruction carried. The indicated STA receives the corresponding response as per predefined rules. For example, take STAID as the basis for judgment. That is to say, in the second transmission resource request STA carries STAID of its own, and when returning the second transmission resource response to the indicated STA, CAP also carries STAID of the indicated STA. Then, STA can confirm if the corresponding response is received correctly by seeing if the second transmission resource response received contains STAID of its own.

Preferably, after assigning the second transmission resource for the indicated STA, the indicated CAP can issue the resource allocation instruction via transmission control channel, i.e. the indicated CAP sends the second transmission resource response in the transmission control channel, carrying the second transmission resource instruction. Accordingly, the indicated STA will receive the indicated second transmission resource response in the indicated transmission control channel and acquire the assigned second transmission resource. Certainly, in another embodiment other channels can be designed to issue the indicated second transmission resource response, and there's no hard limit in this Invention.

Preferably, when sending the first transmission resource request, if no response is received after the highest wait interval predefined for the first transmission resource request, the current resource request is considered as a failure and the resource request needs to be launched again; or when sending the second transmission resource request, if no response is received after the highest wait interval predefined for the second transmission resource request, the current resource request is considered as a failure and the resource request needs to be launched again. The First Embodiment Example of this Invention monitors how long the response returns in order to confirm if the resource request is successful; if not, a new resource request will be launched in time. Meanwhile, by counting frame number the timing is more accurate and the process will be easier to handle.

To realize the resource request method in a competitive way, a STA used for resource request is provided in the First Embodiment Example of this Invention, as shown in FIG. 5, including:

The first sending module 501, used for sending the first transmission resource request;

The first receiving module 502, used for receiving the first transmission resource response which carries the first transmission resource instruction;

The second sending module 503, which uses the indicated first transmission resource to send the second transmission resource request;

The second receiving module 504, used to receive the second transmission resource response which carries the second transmission resource instruction;

The third sending module 505, which uses the indicated second transmission resource to send data.

Preferably, in another embodiment, the indicated STA may also include:

Resource allocation module, located between the second receiving module 504 and the third sending module 505 and used to allocate resources for each service flow in accordance with the second transmission resource instruction. Based on the resource allocation result of the indicated resource allocation module, the indicated third sending module 505 will transmit data of the transmission resource corresponding to each service flow.

Preferably, the indicated first transmission resource request can be a scheduling request sequence.

The indicated first transmission resource request is a scheduling request sequence.

Preferably, the indicated first sending module 501 is used to send the indicated scheduling request sequence in the uplink scheduling request channel.

Preferably, the first receiving module 502 is used to receive the first transmission resource response corresponding to the indicated scheduling request sequence based on the index of the indicated scheduling request sequence, the frequency domain cyclic shift parameter index of the indicated scheduling request sequence, transmission position of the indicated scheduling request sequence in the uplink scheduling request channel and the system frame number sent by the indicated scheduling request sequence.

Preferably, the indicated first receiving module 502 is used to receive the first transmission resource response in the transmission control channel.

Preferably, the indicated second sending module 503 is used to carry STA identifier and the requested resource in the indicated second transmission resource request.

Preferably, the indicated second sending module 503 carries single or multiple service flow identifiers, along with the size of bandwidth resource requested for each service flow in the second transmission resource request to conduct service flow-based resource request.

Preferably, the indicated second sending module 503 uses the index from the preset resource table to indicate the size of bandwidth resource in the indicated second transmission resource request.

Preferably, the indicated second sending module 503 is also used to carry the number of service flow requesting resource in the indicated second transmission resource request.

Preferably, the indicated second sending module 503 is used to encapsulate the indicated second transmission resource request into an independent resource request frame and send it out.

The indicated independent resource request frame contains frame header, frame body and frame check sequence (FCS);

The indicated frame body contains: STA identifier and single or multiple FID message blocks, with service flow identifier and resource index included in each FID message block.

Preferably, the indicated second sending module 503 is used to encapsulate the indicated second transmission resource request into another independent resource request frame and send it out.

The indicated independent resource request frame contains frame header, frame body and frame check sequence (FCS);

The indicated frame body contains: STA identifier, the number of the service flow and single or multiple FID message blocks, with service flow identifier and resource index included in each FID message block.

Preferably, another embodiment includes a first repeat module, which connects with the indicated first sending module 501 and the first receiving module 502 separately. When the indicated first sending module 501 launches the first transmission resource request and the timing starts, if the indicated first receiving module 502 doesn't receive the first transmission resource response after the highest wait interval predefined for the first transmission resource request, the current resource request is regarded as failed, and the indicated first sending module 501 will be triggered to resend the first transmission resource request.

Preferably, another embodiment includes a second repeat module, which connects with the indicated second sending module 503 and the second receiving module 504 separately. When the indicated second sending module 503 launches the second transmission resource request, if the indicated second receiving module 504 doesn't receive the second transmission resource response after the highest wait interval predefined for the second transmission resource request, the current resource request is regarded as failed, and the indicated first sending module 501 will be triggered to resend the first transmission resource request.

Preferably, the indicated second transmission resource request also contains the bandwidth resource requested for each service flow.

Preferably, the indicated bandwidth resource types include:

Preferably, the indicated second transmission resource request can also base on STA to report the resource request;

That is to say, the indicated second transmission resource request may contain the total amount of bandwidth resource requested by the STA which launches the second transmission resource request.

Preferably, the indicated preset resource tables include tables of multiple accuracy scopes.

To realize the resource request method in a competitive way, a CAP for resource request is provided in the First Embodiment Example of this Invention, as shown in FIG. 6, including:

The first receiving module 601, used to receive the first transmission resource request and then allocate the first transmission resource for the corresponding STA;

The first sending module 602, used for sending the first transmission resource response, which carries the first transmission resource instruction, to the indicated corresponding STA;

The second receiving module 603, used to receive the second transmission resource request and then allocate the second transmission resource for the corresponding STA;

The second sending module 604, used for sending the second transmission resource response, which carries the second transmission resource instruction, to the indicated corresponding STA;

The indicated first transmission resource aims to send the second transmission resource request;

The indicated second transmission resource aims at sending data by STA.

Preferably, the indicated first receiving module 601 receives the indicated first transmission resource request which is a scheduling request sequence from the uplink scheduling request channel; the indicated first sending module 602 is used to carry the corresponding index of the indicated scheduling request sequence, the frequency domain cyclic shift parameter index of the indicated request sequence, the transmission position of the indicated request sequence in the uplink scheduling request channel and the system frame number sent by the indicated scheduling request sequence.

Preferably, the indicated first sending module 602 is used to send the indicated first transmission resource response in the transmission control channel.

Preferably, the indicated first sending module 602 is used to send the indicated first transmission resource response via broadcasting.

Preferably, the indicated second sending module 604 is used to send the indicated second transmission resource response in the transmission control channel.

Preferably, the indicated second sending module 604 is used to send the indicated second transmission resource response via unicasting.

Preferably, in the indicated second transmission resource response the indicated second sending module 604 carries the corresponding STA identifier and the resource assigned for the indicated STA.

To realize the aforesaid resource request method in a competitive way, a system specific to realize resource request is provided in the First Embodiment Example of this Invention, including the aforesaid STA and CAP which will exchange and compete to fulfill the resource request process. This is especially applicable for scenarios where the STA doesn't have transmission resource.

A method for resource request is provided in the First Embodiment Example of this Invention, including:

Generate the transmission resource request which includes STA identifier, identifiers for single or multiple service flows, and the bandwidth resource size requested for each service flow;

Send the indicated transmission resource request.

Preferably, the indicated transmission resource request also contains the amount of service flow which is requesting resource.

Preferably, encapsulate the indicated transmission resource request into an independent resource request frame and send it out.

The indicated independent resource request frame contains frame header, frame body and FCS;

The indicated frame body contains: STA identifier and single or multiple FID message blocks, with service flow identifier and resource index included in each FID message block.

Preferably, encapsulate the indicated transmission resource request into another independent resource request frame and send it out.

The indicated independent resource request frame contains frame header, frame body and FCS;

The indicated frame body contains: STA identifier, number of the service flow and single or multiple FID message blocks, with service flow identifier and resource index included in each FID message block.

Preferably, the indicated transmission resource request also includes the type of the bandwidth resource requested by each service flow.

Preferably, types of the indicated bandwidth resource include:

Increment bandwidth indicates, when assigning transmission resource for service flow, the bandwidth resource size that increases or decreases in current request of the indicated service flow comparing to the bandwidth resource size already assigned for the indicated service flow.

Total bandwidth indicates, when assigning transmission resource for service flow, using the bandwidth resource size in current request of the indicated service flow to replace the bandwidth resource size already assigned for the indicated service flow.

Preferably, the indicated bandwidth resource size is denoted with the index from the preset resource tables.

Preferably, the indicated transmission resource request carries the preset resource table, different types of resource table corresponding to different accuracy scopes. The indicated preset resource tables contain tables of multiple accuracy scopes.

Another method for resource request is provided in the First Embodiment Example, including.

Generate the transmission resource request which includes STA identifier and the bandwidth resource size requested by the indicated STA; and then send the indicated transmission resource request.

Preferably, the indicated transmission resource request also include the type of the bandwidth resource requested by STA.

Preferably, types of the indicated bandwidth resource include:

Increment bandwidth indicates, when assigning transmission resource for STA, the bandwidth resource size that increases or decreases in current request of the indicated STA comparing to the bandwidth resource size already assigned for the indicated STA.

Total bandwidth indicates, when assigning transmission resource for STA, using the bandwidth resource size in current request of the indicated STA to replace the bandwidth resource size already assigned for the indicated STA.

Preferably, the indicated bandwidth resource size is denoted with the index from the preset resource tables.

Second Embodiment Example

The Second Embodiment Example of this Invention also provides a resource request method that by using the occasion and resource of uplink data transmission send the transmission resource request to CAP along with the uplink data, as shown in FIG. 7, including the following steps:

Step S701: STA carries the transmission resource request in data frame;

Step S702: the indicated STA sends the indicated data frame carrying the transmission resource request;

Step S703: CAP receives the indicated data frame carrying the transmission resource request;

Step S704: the indicated CAP analyses the indicated transmission resource request from the indicated data frame;

Step S705: according to the indicated transmission resource request, the indicated CAP assigns transmission resource for the indicated STA;

Step S706: the indicated CAP sends the transmission resource response, which carries the transmission resource instruction, to the indicated STA;

Step S707: the indicated STA receives the indicated transmission resource response;

Step S708: the indicated STA sends data by using the indicated transmission resource.

The above method is adopted in the Second Embodiment Example to send transmission resource request to CAP along with the uplink data. With the uplink data transmission, it is possible to use the aforesaid channel associated resource request method to demand resource, dispensing with the process that request uplink transmission resource first and then send the indicated transmission resource request. Therefore, the resource request process features less exchanged Steps and time.

Preferably, STA can also carry the channel associated request instruction in the data frame which loads the transmission resource request to denote the presence of the indicated transmission resource request. Accordingly, in the wake of receiving the data frame, CAP is able to judge if the indicated data frame loads the transmission resource request through the indicated channel associated request instruction. Certainly, another method is also available to see if the indicated data frame loads the transmission resource request. Instead of carrying the channel associated request instruction, another embodiment achieves this by setting up specific field to carry the indicated transmission resource request and then analyzing the corresponding field, and there's no hard limit in this Invention.

Considering when analyzing data frame, CAP intends to analyze the frame header first to acquire parameter information, so when encapsulating the channel associated request instruction into the data frame, it is acceptable to encapsulate the indicated channel associated request instruction into the header of the indicated data frame.

In practical, when fulfilling the channel associated request instruction, a field for the channel associated request instruction can be established in the header of data frame. Then the field value will indicate if the transmission resource request exists, for example, 1 stands for the existence of transmission resource request while 0 stands for the inexistence.

The indicated field for channel associated request instruction can be new or field existing in the frame header, for example, take an idle filed and redefine it for the channel associated request instruction, and there's no hard limit in this Invention. The position of the indicated filed for channel associated request instruction in the frame header can be set as per preset rules, and there's no hard limit in this Invention.

STA can carry the indicated transmission resource request in the body of indicated data frame. In practical, a field for the channel associated request instruction can be established in the header of data frame to carry the indicated transmission resource request. If the data frame doesn't carry the transmission resource request, then it's not necessary to establish the field for the channel associated request instruction in the header of data frame, or fill the field for the channel associated request instruction with a fixed value.

The indicated field for channel associated resource request can be new or field existing in the frame body, for example, take an idle filed and redefine it for the channel associated resource request, and there's no hard limit in this Invention. The position of the indicated filed for channel associated resource request in the frame body can be set as per preset rules, for example, the field for channel associated resource request should be the first few bits of the fame body, and there's no hard limit in this Invention.

Preferably, a format for channel associated transmission resource request is provided in the Second Embodiment Example of this Invention, aiming to support the requested resource based on service flow report. Thereinto, the indicated transmission resource request includes the identifier of STA, which launches the indicated transmission resource request and amounts to the bandwidth resource size requested by each service flow in single or multiple service flows, along with identifiers of each service flow. By means of analyzing the indicated transmission resource request, CAP can learn each service flow of the indicated STA and the resource request of each indicated service flow.

Preferably, the indicated transmission resource request may also include the type of the bandwidth resource requested for each service flow. CAP allows STA to choose the requested bandwidth resource type specific to different service flow, making the resource request more flexible and humanized.

The optional bandwidth resource types include:

Preferably, another format for the transmission resource request is provided in the Second Embodiment Example of this Invention, aiming to support the requested resource based on STA report. Thereinto, the indicated transmission resource request includes the identifier of STA, which launches the indicated transmission resource request, along with the total bandwidth resource size requested by the indicated STA.

Preferably, the indicated transmission resource request may also include the type of the bandwidth resource requested by the indicated STA. CAP allows STA to choose the requested bandwidth resource type as needed, making the resource request more flexible and humanized.

The optional bandwidth resource types include:

Preferably, a representation method for bandwidth resource is provided in the Second Embodiment Example that first design a resource table (like Table 3) and then use the index of the indicated bandwidth resource from the preset resource table to indicate the size of requested bandwidth resource. Therefore, when reporting the requested bandwidth resource, only the index value corresponding to the indicated bandwidth resource in the table needs to be carried. Especially when the requested bandwidth resource is huge, using the index value in replace of specific bandwidth resource value would greatly reduce the occupied bits and save transmission resource.

Preferably, resource tables with multiple accuracy scopes can be designed as needed. When conducting resource request, choose the proper resource table in line with the requested resource. The identifier and index of the resource table will be loaded in the resource request and the same resource table can be maintained on CAP side. By means of the identifier and index of the received resource request, locate the resource size of the corresponding index from the relevant resource table and thus learn the resource size requested by STA.

The Second Embodiment Example of this Invention provides a specific data frame structure carrying transmission resource request, including frame header, frame body and FCS. The frame header contains the field for channel associated resource request; if the field value denotes there's transmission resource request in the frame body, the frame body contains the field for channel associated resource request. The indicated field for channel associated resource request contains single or multiple FID message blocks, which comprise service flow identifiers (FID) and resource index each. In which, the resource index belongs to the index of requested bandwidth resource from the resource table.

In another embodiment, the FID message block also contains the type field of resource table in order to support resources of different accuracy scopes. In addition, if different resource types are available for allocation, for example, both increment bandwidth and total bandwidth are allowed, then an instruction on the resource type requested by the service flow can be set up in the FID message block.

If using the STA report-based method as above, only the content carried in the field for channel associated resource request needs to be changed, and then have the resource table identifier and resource index carried. Instructions are no longer described here.

After assigning transmission resource for the indicated STA, the indicated CAP can send the indicated transmission resource response via unicasting, with the transmission resource instruction carried. The indicated STA receives the corresponding response as per predefined rules. For example, take STAID as the basis for judgment. That is to say, in the transmission resource request STA carries STAID of its own, and when returning the transmission resource response to the indicated STA, CAP also carries STAID of the indicated STA. Then STA can confirm if the corresponding response is received correctly by seeing if the transmission resource response received contains STAID of its own.

Preferably, after assigning transmission resource for the indicated STA, the indicated CAP can issue resource allocation instruction via transmission control channel, i.e. the indicated CAP sends transmission resource response in the transmission control channel, carrying the transmission resource instruction. Accordingly, the indicated STA will receive the indicated transmission resource response in the indicated transmission control channel and acquire the assigned transmission resource. Certainly, in another embodiment other channels can be designed to issue the indicated transmission resource response, and there's no hard limit in this Invention.

Preferably, after receiving the transmission resource response, STA can also base on the indicated transmission resource instruction to allocate resources among each service flow before using the transmission resource to transmit data.

Preferably, when STA sends the data frame carrying the transmission resource request, if no response is received after the highest wait interval predefined, the current resource request is considered as a failure and the resource request needs to be launched again. The Second Embodiment Example of this Invention monitors how long the response returns in order to confirm if the resource request is successful; if not, a new resource request will be launched in time. Meanwhile, by counting frame number the timing is more accurate and the process will be easier to handle.

To realize the channel associated resource request method as above, a STA used for resource request is provided in the Second Embodiment Example of this Invention, as shown in FIG. 8, including:

Encapsulation module 801, used to carry the transmission resource request in data frame;

The first sending module 802, used to send the indicated data frame carrying the transmission resource request.

Receiving module 803, used to receive the transmission resource response, which carries the transmission resource instruction;

The second sending module 804, which uses the indicated transmission resource to send data.

Preferably, in another embodiment, the indicated STA may also include:

Resource allocation module, located between the receiving module 803 and the second sending module 804 and used to allocate resources for each service flow in accordance with the indicated transmission resource instruction. Based on the resource allocation result of the indicated resource allocation module, the indicated second sending module 804 will transmit data of the transmission resource corresponding to each service flow.

Preferably, the indicated encapsulation module 801 can also encapsulate the channel associated request instruction in data frame to denote the presence of the indicated transmission resource request.

Preferably, the indicated encapsulation module 801 can carry the indicated channel associated request instruction in header of the indicated data frame.

Preferably, the indicated encapsulation module 801 can set up a field in header of the data frame to denote the presence of the indicated transmission resource request by field value.

Preferably, the indicated encapsulation module 801 can carry the indicated transmission resource request in body of the indicated data frame.

Preferably, the indicated encapsulation module 801 can set up a field in body of the data frame to carry the indicated transmission resource request.

Preferably, the indicated transmission resource request can base on service flow to report the resource request:

That is to say, the indicated transmission resource request can include identifiers for single or multiple service flows, and the size of bandwidth resource requested for each service flow.

Preferably, the indicated transmission resource request can also include the type of the bandwidth resource requested for each service flow.

Preferably, types of the indicated bandwidth resource include:

Preferably, the indicated transmission resource request can base on STA to report the resource request:

That is to say, the indicated transmission resource request may include the total amount of bandwidth resource requested by STA which launches the indicated transmission resource request.

Preferably, the indicated transmission resource request can also include the type of the bandwidth resource.

Preferably, types of the indicated bandwidth resource include:

Preferably, the indicated transmission resource request includes identifier of STA, which launches the indicated transmission resource request; the indicated transmission resource response carries identifier of the indicated STA.

Preferably, use the index from preset resource tables to denote the size of bandwidth resource.

Preferably, the indicated preset resource tables include tables of multiple accuracy scopes.

Preferably, the indicated second sending module 804 transmits data of the transmission resource corresponding to each service flow.

Preferably, the indicated receiving module 803 can receive the indicated transmission resource response in the transmission control channel.

Preferably, in another embodiment, the indicated STA also includes:

Regarding the repeat model, when the indicated first sending module 802 launches the indicated data frame carrying transmission resource request and the timing starts, if the indicated receiving module 803 doesn't receive the indicated transmission resource response after the highest wait interval predefined, the current resource request is regarded as failed; when having another data frame transmission, the encapsulation module 801 is triggered to carry the indicated transmission resource request in data frame and resend the resource request.

To realize the channel associated resource request method as above, a CAP used for resource request is provided in the Second Embodiment Example of this Invention, as shown in FIG. 9, including:

Receiving module 901, used to receive data frame which carries the transmission resource request;

Analysis module 902, used to analyze the indicated transmission resource request from the indicated data frame;

Resource allocation module 903, used to allocate transmission resource for STA according to the indicated transmission resource request;

Sending module 904, used to send the transmission resource response, which carries the transmission resource instruction, to the indicated corresponding STA.

Preferably, the indicated data frame can also include the channel associated request instruction used to denote the presence of the indicated transmission resource request. Accordingly, the indicated analysis module 902 can learn the existence of transmission resource request by analyzing the channel associated request instruction in data frame.

Preferably, a field is established in the header of data frame and the field value can denote if the indicated transmission resource request exists. Accordingly, the indicated analysis module 902 can learn the existence of transmission resource request by analyzing the field for channel associated request instruction in header of the data frame.

Preferably, the indicated transmission resource request is carried in the body of data frame. Accordingly, the indicated analysis module 902 can acquire the indicated transmission resource request by analyzing the body of data frame.

Preferably, a field is established in body of the indicated data frame, carrying the indicated transmission resource request. Accordingly, the indicated analysis module 902 can acquire the indicated transmission resource request by analyzing the field for associated channel resource request in the body of data frame.

Preferably, the indicated transmission resource request can base on service flow to report the resource request:

That is to say, the indicated transmission resource request can include identifiers for single or multiple service flows, and the size of bandwidth resource requested for each service flow.

Preferably, the indicated transmission resource request can also include the type of the bandwidth resource requested for each service flow.

Preferably, types of the indicated bandwidth resource include:

Preferably, the indicated transmission resource request can base on STA to report the resource request:

That is to say, the indicated transmission resource request include the total amount of bandwidth resource requested by STA which launches the indicated transmission resource request.

Preferably, the indicated transmission resource request can also include the type of the bandwidth resource.

Preferably, types of the indicated bandwidth resource include:

Preferably, the indicated transmission resource request includes the identifier of STA, which launches the indicated transmission resource request; the indicated transmission resource response carries identifier of the indicated STA.

Preferably, use the index from preset resource tables to denote the size of bandwidth resource.

Preferably, the indicated preset resource tables include tables of multiple accuracy scopes.

Preferably, the indicated sending module 904 can send the indicated transmission resource request to the indicated corresponding STA in the transmission control channel.

Preferably, the indicated sending module 904 can send the indicated transmission resource response to the corresponding STA via unicasting.

To realize the aforesaid channel associated resource request method, a system specific to realize resource request is provided in the Second Embodiment Example of this Invention, including the aforesaid STA and CAP which will exchange to make full use of the occasion and resource of data transmission to fulfill the resource request process in a channel associated way.

Third Embodiment Example

A method for resource allocation is provided in the Third Embodiment Example of this Invention that CAP actively polls at least one STA to allocate resource used for sending resource request, as shown in FIG. 10, including the following steps:

Step S1001: CAP polls at least one STA and allocates the first transmission resource to each polled STA;

Step S1002: the indicated CAP sends the first transmission resource instruction to the indicated polled STA;

Step S1003: the indicated STA receives the first transmission resource instruction;

Step S1004: the indicated STA uses the indicated first transmission resource to send transmission resource request;

Step S1005: the indicated CAP receives the indicated transmission resource request and allocates the second transmission resource for the corresponding STA;

Step S1006: the indicated CAP sends the transmission resource response, which carries the second transmission resource instruction, to the indicated corresponding STA;

Step S1007: the indicated STA receives the indicated transmission resource response;

Step S1008: the indicated STA uses the indicated second transmission resource to send data.

In the Third Embodiment Example of this Invention, CAP actively allocates the first transmission resource for STA in a polling way. Therefore, STA can use the first transmission resource to launch resource request, without obtaining the transmission resource first before launching uplink transmission data request.

Preferably, CAP can use the preset polling strategies to poll STA:

For example, set up parameters like polling order, polling interval and resource allocation condition, by which the STA will be polled. In the Third Embodiment Example of this Invention, the established resource allocation condition is that all polled STA will have resource allocated.

Preferably, the indicated polling strategy can also be: see if there's transmission resource available for allocation currently; if there's transmission resource able for allocation, start the polling Step. Therefore, when having the transmission resource available for allocation, CAP will actively allocate the transmission resource for STA without letting STA request first, which helps reduce the exchange steps during the resource request process and speed up the process of the whole system.

The indicated CAP can trigger the judgment on current bandwidth resource available for allocation as per predefined rules, for example, periodic judgment, real-time judgment or other assumptions, and there's no hard limit in this Invention.

After allocating the first transmission resource for the indicated STA, the indicated CAP can send the first transmission resource instruction to the indicated STA via unicasting.

Preferably, after assigning the first transmission resource for the indicated STA, the indicated CAP can issue the resource allocation instruction via transmission control channel. That is to say, the indicated CAP could launch the first transmission resource instruction from the transmission control channel. Accordingly, the indicated STA would receive the indicated first transmission resource instruction in the indicated transmission control channel to get the first transmission resource. Certainly, the first transmission resource instruction can be issued via other channels in another embodiment, and there's no hard limit in this Invention.

Preferably, a format for transmission resource request is provided in the Third Embodiment Example of this Invention, aiming to support the requested resource based on service flow report. Thereinto, the indicated transmission resource request includes the identifier of STA, which launches the indicated second transmission resource request, identifiers of single or multiple service flows and the size of bandwidth resource requested for each service flow. By means of analyzing the indicated transmission resource request, CAP can learn each service flow of the indicated STA and the resource request of each indicated service flow.

The optional bandwidth resource types include:

Preferably, another format for transmission resource request is provided in the Third Embodiment Example of this Invention, aiming to support the requested resource based on STA report. Thereinto, the indicated transmission resource request includes the identifier of STA, which launches the indicated transmission resource request, along with the total size of bandwidth resource requested by the indicated STA.

The optional bandwidth resource types include:

Preferably, a representation method for bandwidth resource is provided in the Third Embodiment Example of this Invention that first design a resource table (like Table 3) and then use the index of the indicated bandwidth resource from the preset resource table to indicate the size of requested bandwidth resource. Therefore, when reporting the requested bandwidth resource, only the index value corresponding to the indicated bandwidth resource in the table needs to be carried. Especially when the requested bandwidth resource is huge, using the index value in replace of specific bandwidth resource value would greatly reduce the occupied bits and save transmission resource.

Preferably, resource tables with multiple accuracy scopes can be designed as needed. When conducting resource request, choose the proper resource table in line with the requested resource. The identifier and index of the resource table will be loaded in the resource request and the same resource table can be maintained on CAP side. By means of the identifier and index of the received resource request, locate the resource size of corresponding index from the relevant resource table and thus learn the resource size requested by STA.

In the Third Embodiment Example of this Invention, the indicated transmission resource request can be sent by loading into the resource request frame. Taking the aforementioned method on the basis of service flow report for example, this embodiment provides a specific resource request frame structure, as shown in FIG. 4, including frame header, frame body and FCS. The frame header contains frame control information, such as frame type (management control in this case), subtype (independent resource request frame in this case), version information and so on; the frame body contains the number of STAID, the number of FID, and single or multiple FID message blocks which comprise service flow identifiers and resource index each. In which, the resource index belongs to the index of requested bandwidth resource from the resource table. In addition, if different resource types are available for allocation, for example, both increment bandwidth and total bandwidth are allowed, then an instruction on the requested resource type can be set up in the bandwidth resource request of the indicated service flow.

If using the STA report-based method as above, only body of the independent resource request frame shown in FIG. 4 needs to be changed, and the STAID and resource index can be encapsulated in the frame body. Besides, if resource tables of multiple accuracy scopes are adopted, the resource table type field can be set up in the frame body. Instructions are no longer described here.

After assigning the second transmission resource for the indicated STA, the indicated CAP can send the indicated transmission resource response via unicasting, with the second transmission resource instruction carried. The indicated STA receives the corresponding response as per predefined rules. For example, take STAID as the basis for judgment. That is to say, in the transmission resource request STA carries STAID of its own, and when returning the transmission resource response to the indicated STA, CAP also carries STAID of the indicated STA. Then, STA can confirm if the corresponding response is received correctly by seeing if the transmission resource response received contains STAID of its own.

Preferably, the indicated CAP can send the transmission resource response via transmission control channel, carrying the second transmission resource instruction. Accordingly, the indicated STA will receive the indicated transmission resource response in the indicated transmission control channel and acquire the assigned second transmission resource. Certainly, in another embodiment other channels can be designed to issue the indicated transmission resource response, like downlink transmission channel, and there's no hard limit in this Invention.

To realize the aforesaid polling allocation, a CAP used for realizing resource allocation is provided in the Third Embodiment Example of this Invention, as shown in FIG. 11, including:

The first resource allocation module 1101, used to poll at least one STA and allocate the first transmission resource for the polled STA;

The first sending module 1102, used to send the first transmission resource instruction to the polled STA;

The second resource allocation module 1103, used to receive the transmission resource request and allocate the second transmission resource for the corresponding STA;

The second sending module 1104, used to send the transmission resource response, which carries the second transmission resource instruction, to the indicated corresponding STA;

The indicated first transmission resource is used to send transmission resource request by STA;

The indicated second transmission resource is used to send data by STA.

Preferably, the indicated second resource allocation module 1103 supports the resource request based on service flow report. The indicated resource requests based on service flow report include: identifier of STA, identifiers of single or multiple service flows, and the size of bandwidth resource requested for each service flow. By means of analyzing the indicated transmission resource request, the indicated second resource allocation module 1103 can learn each service flow of the indicated STA and the resource request of each indicated service flow.

Preferably, the indicated transmission resource request may also include the type of the bandwidth resource requested for each service flow. The indicated second resource allocation module 1103 allows STA to choose the requested bandwidth resource type specific to different service flow, making the resource request more flexible and humanized.

The optional bandwidth resource types include:

Preferably, the indicated second resource allocation module 1103 supports the resource request based on STA report. The indicated resource requests based on STA report include: identifier of STA, which launches the indicated transmission resource request, and the total amount of bandwidth resource requested by the indicated STA. By means of analyzing the indicated transmission resource request, the indicated second resource allocation module 1103 can learn the overall resource request by the indicated STA.

Preferably, the indicated transmission resource request may also include the type of the bandwidth resource requested by the indicated STA. The indicated second resource allocation module 1103 allows STA to choose the requested bandwidth resource type as needed, making the resource request more flexible and humanized.

The optional bandwidth resource types include:

Preferably, use the index of the indicated bandwidth resource from preset resource tables to denote the size of bandwidth resource requested.

Preferably, the indicated preset resource tables include tables of multiple accuracy scopes.

Preferably, the indicated first sending module 1102 can send the indicated first transmission resource instruction in the transmission control channel.

Preferably, the indicated first sending module 1102 can send the indicated first transmission resource instruction via unicasting.

Preferably, the indicated second sending module 1104 can send the indicated transmission resource response in the transmission control channel.

Preferably, the indicated second sending module 1104 can send the indicated transmission resource response via unicasting.

Preferably, the indicated CAP also contains:

The judgment module 1105 is used to judge if there's transmission resource available for allocation now. If there's transmission resource available for allocation, the resource allocation instruction will be sent to the indicated first resource allocation module 1101 which will perform the polling after receiving the indicated resource allocation instruction.

Fourth Embodiment Example

Another method for resource allocation is provided in the Fourth Embodiment Example of this Invention that CAP actively allocates resources used for STA sending data, as shown in FIG. 12, including the following steps:

Step S1201: CAP polls at least one STA and allocates the first transmission resource to the polled STA;

Step S1202: the indicated CAP sends the first transmission resource instruction to the indicated polled STA;

Step S1203: the indicated STA receives the first transmission resource instruction;

Step S1204: the indicated STA uses the indicated first transmission resource to send data.

Unlike the resource allocation method in the Third Embodiment Example, CAP directly polls STA and allocates resources used for data transmission, which means STA doesn't need to launch resource request in order to realize data transmission.

To realize the aforesaid polling allocation, a CAP used for realizing resource allocation is provided in the Fourth Embodiment Example of this Invention, as shown in FIG. 13, including:

The first resource allocation module 1301, used to poll at least one STA and allocate the first transmission resource for the polled STA;

The first sending module 1302, used to poll the first transmission resource instruction for the polled STA;

The indicated first transmission resource is used for data transmission by STA.

Preferably, the indicated first sending module 1302 can send the indicated first transmission resource instruction in the transmission control channel.

Preferably, the indicated first sending module 1302 can send the indicated first transmission resource instruction via unicasting.

Preferably, the indicted CAP can also include:

The judgment module 1303 is used to judge if there's transmission resource available for allocation now. If there's transmission resource available for allocation, the resource allocation instruction will be sent to the indicated first resource allocation module 1301 which will perform the polling after receiving the indicated resource allocation instruction.

Fifth Embodiment Example

Another method for resource allocation is provided in the Fifth Embodiment Example of this Invention that CAP actively allocates resources used for at least one STA sending resource request in polling way, as shown in FIG. 14, including the following steps:

Step S1401: CAP polls at least one STA, allocates the first transmission resource to the polled STA, which reaches the established resource allocation cycle;

Step S1402: the indicated CAP sends the first transmission resource instruction to the indicated polled STA;

Step S1403: the indicated STA receives the first transmission resource instruction;

Step S1404: the indicated STA uses the indicated first transmission resource to send resource request;

Step S1405: the indicated CAP receives the resource request, allocates the second transmission resource to the indicated STA;

Step S1406: the indicated CAP sends the resource response, which carries the second transmission resource instruction, to the indicated STA;

Step S1407: the indicated STA receives the resource response;

Step S1408: the indicated STA uses the indicated second transmission resource to send data.

Based on the polling allocation solution in the Third Embodiment Example, the monitoring on STA resource allocation cycle is added in the Fourth Embodiment Example, and the SAT which reaches the resource allocation cycle will obtain resource in priority, making the resource allocation more appropriate.

CAP maintains the resource allocation cycle of STA. After assigning the first transmission resource for STA, CAP will recalculate the resource allocation cycle for STA which already obtains the first transmission resource.

In practical, the indicated CAP can use timer to maintain the resource allocation cycle of STA. In case of time out, STA reaches the established resource allocation cycle, then CAP allocates resource to STA and restart the timer; if not, STA doesn't reach the established resource allocation cycle, and CAP won't allocate resource for STA.

Preferably, the resource allocation cycle of STA is calculated by parameters of its current business type, including priority, time delay budget, package lost budget, and so on. Therefore, it is possible to base on practical business demand to establish the resource allocation cycle and make the resource allocation more reasonable.

To realize the aforesaid polling allocation, a CAP used for realizing resource allocation is provided in the Fifth Embodiment Example of this Invention, as shown in FIG. 15, including:

The first resource allocation module 1501, used to poll at least one STA, allocates the first transmission resource to the polled STA, which reaches the established resource allocation cycle;

The first sending module 1502, used to send the first transmission resource instruction to the indicated polled STA;

The second resource allocation module 1503, used to receive the resource request, allocates the second transmission resource to the indicated STA;

The second sending module 1504, used to send the resource response, which carries the second transmission resource instruction, to the indicated STA.

The indicated first transmission resource is used for resource request transmission by STA.

The indicated second transmission resource is used for data transmission by STA.

Preferably, the indicated first resource allocation module 1501 will recalculate the resource allocation cycle for STA which already obtains the first transmission resource.

In practical, the indicated first resource allocation module 1501 can use timer to maintain the resource allocation cycle of STA. In case of time out, STA reaches the established resource allocation cycle, then the indicated first resource allocation module 1501 allocates resource to STA and restart the timer; if not, STA doesn't reach the established resource allocation cycle, and the indicated first resource allocation module 1501 won't allocate resource for STA.

Preferably, the indicated second resource allocation module 1503 supports the resource request based on service flow report. The indicated resource requests based on service flow report include: identifier of STA, identifiers of single or multiple service flows, and the size of bandwidth resource requested for each service flow. By means of analyzing the indicated transmission resource request, the indicated second resource allocation module 1503 can learn each service flow of the indicated STA and the resource request of each indicated service flow.

Preferably, the indicated transmission resource request may also include the type of the bandwidth resource requested for each service flow. The indicated second resource allocation module 1503 allows STA to choose the requested bandwidth resource type specific to different service flow, making the resource request more flexible and humanized.

The optional bandwidth resource types include:

Preferably, the indicated second resource allocation module 1503 supports the resource request based on STA report. The indicated resource requests based on STA report include: identifier of STA, which launches the indicated transmission resource request, and the total amount of bandwidth resource requested by the indicated STA. By means of analyzing the indicated transmission resource request, the indicated second resource allocation module 1503 can learn the overall resource request by the indicated STA.

Preferably, the indicated transmission resource request may also include the type of the bandwidth resource requested by the indicated STA. The indicated second resource allocation module 1503 allows STA to choose the requested bandwidth resource type as needed, making the resource request more flexible and humanized.

The optional bandwidth resource types include:

Preferably, use the index of the indicated bandwidth resource from preset resource tables to denote the size of bandwidth resource requested.

Preferably, the indicated preset resource tables include tables of multiple accuracy scopes.

Preferably, the indicated first sending module 1502 can send the indicated first transmission resource instruction in the transmission control channel.

Preferably, the indicated first sending module 1502 can send the indicated first transmission resource instruction via unicasting.

Preferably, the indicated second sending module 1504 can send the indicated transmission resource response in the transmission control channel.

Preferably, the indicated second sending module 1504 can send the indicated transmission resource response via unicasting.

Preferably, the indicated CAP also contains:

The judgment module 1505 is used to judge if there's transmission resource available for allocation now. If there's transmission resource available for allocation, the resource allocation instruction will be sent to the indicated first resource allocation module 1501 which will perform the polling after receiving the indicated resource allocation instruction.

Sixth Embodiment Example

Another method for resource allocation is provided in the sixth Embodiment Example of this Invention that CAP actively allocates resources used for STA sending data, as shown in FIG. 16, including the following steps:

Step S1601: CAP polls at least one STA, allocates the first transmission resource to the polled STA, which reaches the established resource allocation cycle;

Step S1602: the indicated CAP sends the first transmission resource instruction to the indicated polled STA;

Step S1603: the indicated STA receives the first transmission resource instruction;

Step S1604: the indicated STA uses the indicated first transmission resource to send data.

Unlike the resource allocation method in the Fifth Embodiment Example, CAP directly polls STA and allocates resources used for data transmission, which means STA doesn't need to launch resource request in order to realize data transmission.

To realize the aforesaid polling allocation, a CAP used for realizing resource allocation is provided in the Sixth Embodiment Example of this Invention, as shown in FIG. 17, including:

The first resource allocation module 1701, used to poll at least one STA, allocates the first transmission resource to the polled STA, which reaches the established resource allocation cycle;

The first sending module 1702, used to poll the first transmission resource instruction for the polled STA;

The indicated first transmission resource is used for data transmission by STA.

Preferably, the indicated first resource allocation module 1701 will recalculate the resource allocation cycle for STA which already obtains the first transmission resource.

In practical, the indicated first resource allocation module 1701 can use timer to maintain the resource allocation cycle of STA. In case of time out, STA reaches the established resource allocation cycle, then the indicated first resource allocation module 1701 allocates resource to STA and restart the timer; if not, STA doesn't reach the established resource allocation cycle, and the indicated first resource allocation module 1701 won't allocate resource for STA.

Preferably, the indicated first sending module 1702 can send the indicated first transmission resource instruction in the transmission control channel.

Preferably, the indicated first sending module 1702 can send the indicated first transmission resource instruction via unicasting.

Preferably, the indicted CAP can also include:

The judgment module 1703 is used to judge if there's transmission resource available for allocation now. If there's transmission resource available for allocation, the resource allocation instruction will be sent to the indicated first resource allocation module 1701 which will perform the polling after receiving the indicated resource allocation instruction.

Seventh Embodiment Example

Several methods are given in the First to Sixth Embodiment Example of this Invention to make STA obtain resources used for uplink transmission data, including: competitive resource request method (First Embodiment Example), channel associated resource request method (Second Embodiment Example) and polling allocation method (from the Third to Sixth Embodiment Example). In which:

For both competitive and channel associated resource request methods, STA launches the request actively. In competitive resource request, STA actively requests the resource in a competitive way, which is applicable for scenarios without uplink transmission resource; in channel associated resource request, STA carries the resource request information in data frame and sends it along with the uplink transmission data, which is applicable for scenarios with uplink data transmission and useful to reduce resource request exchanges and boost the resource allocation speed of the whole system. In polling allocation method, CAP actively allocates resource for STA and it's unnecessary for STA to launch request first, which helps analyze resource properly, allocate resource for STA actively when possible, and thus reduce resource request exchanges to speed up the resource allocation of the whole system. Therefore, a better result can be achieved by combing these three methods in accordance with specific scenario. A combing method is provided in the Seventh Embodiment Example of this Invention:

With resources available, CAP allocates resource for STA actively, and consequently STA uses the indicated uplink transmission resource to send resource request or data directly; if CAP doesn't allocate resource for STA, in the absence of uplink transmission resource STA suits to launch resource request in a competitive way; with uplink transmission resource STA suits to adopt the channel associated method, namely, carry the resource request in data frame and send it out.

Preferably, in the Seventh Embodiment Example of this Invention CAP is designed to allocate resource used for uplink data transmission to STA, which bases on STAID. That is to say, according to the resource requested by STA (based on FID or STA request), CAP calculates total resources to allocate for STA which will allocate resources among service flows then. Namely, after acquiring the assigned total resources, STA will fulfill the second allocation among service flows via internal scheduling, which means STA first allocates the transmission resources among multiple service flows and then controls the indicated multiple service flows to transmit data to the corresponding transmission resources. The indicated method to allocate resource among service flows can be established as needed, such as by priority or equipartition, and there's no hard limit in this Invention. By using the aforesaid second allocation method, operations on CAP side can be simplified as STA shares part of the resource allocation work. This helps to speed up the overall resource allocation for multiple STA system; meanwhile, STA can design the resource allocation strategy according to demands like set business priority, making the resource allocation more flexible, able to meet different client needs and providing better user experience.

Preferably, after acquiring the assigned resource, the indicated STA will judge if the assigned resource meets the requirement. If so, STA uses the indicated transmission resource to send data which needs to be sent; if not, STA uses the indicated transmission resource to send part of the data which needs to be sent and performs the resource request again in accordance with the bandwidth resource currently needed. When re-performing the resource request, due to uplink data transmission, the better way is to use channel associated resource request method to realize resource request.

Compare the assigned resource with the requested resource to see if the requirement is met. If the indicated assigned resource is smaller than the requested resource, the requirement is not met; otherwise, the requirement is met.

Preferably, during the preset period after sending the request, if the indicated STA doesn't receive the corresponding response, this request is regarded as a failure, and the resource request will be performed again. Preferably, the timing is achieved by accounting frames in the Seventh Embodiment Example of this Invention, which guarantees more accurate timing and instant treatment:

When using the competitive resource request method to demand resource, CAP will return the response (ACK) message after receiving the second transmission resource request to inform of STA that the indicated second transmission resource request is received. After sending the first transmission resource request, if STA doesn't receive the first transmission resource response beyond the preset first waiting interval at maximum, the current resource request is regarded as failed, and the resource request needs to be launched again; or after sending the second transmission resource request, if STA doesn't receive the second transmission resource response beyond the preset second waiting interval at maximum, the current resource request is regarded as failed, and the resource request needs to be launched again.

When using channel associated resource request method to demand resource, after sending the data frame which carries the resource request information, if no corresponding response is received beyond the preset third waiting interval at maximum, the current request is regarded as failed and the resource request will be launched again.

The specific method for re-performing resource request can be decided upon practical scenario. If no uplink transmission resource exists currently, STA can launch competitive resource request; if uplink transmission resource exists currently, STA can use channel associated method to carry the resource request in data frame and send it out.

The above description includes the examples of one or more embodiments. However, it is impossible to exhaust all potential combinations of the components and methods in describing the above embodiments, but it should be understood by one skilled in the art that components and methods of each embodiment may be further combined and arranged. Therefore, the embodiments described herein intend to contemplate all such changes, modifications and variations that fall into the scope of the appended claims. In addition, the term “comprise” used in the specification or the claims is similar to the term “include”, just like the interpretation of the term “include” in the claims as a connection word. Additionally, any term “or” used in the claims or the specification intends to represent a “nonexclusive or”.

Number	Date	Country	Kind
201110081288.6	Mar 2011	CN	national
201110130194.3	May 2011	CN	national
201110188594.X	Jul 2011	CN	national
201210027898.2	Feb 2012	CN	national
201210041628.7	Feb 2012	CN	national

Resource Request Method, Station, and Central Access Point

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CPC

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