The present invention relates to a scheduling apparatus and a scheduling method.
For an uplink channel of LTE-Advanced, which is an evolved version of 3rd generation partnership project long-term evolution (3GPP LTE), using “non-contiguous frequency transmission” in addition to contiguous frequency transmission, is under consideration to improve the sector throughput performance (see Non-Patent Literature 1).
Non-contiguous frequency transmission is a method of transmitting a data signal and a reference signal by assigning such signals to non-contiguous frequency bands, which are dispersed in a wide range of band. As shown in
Here, as a method of reporting frequency resource assignment information for non-contiguous frequency transmission, there is a method of performing assignment in the non-contiguous band by transmitting a plurality of two pieces of frequency resource assignment information for contiguous band assignment including a heading resource number and an end resource number and combining those pieces of frequency resource assignment information (see Non-Patent Literature 2). As shown in
[1]
Number of signaling bits=┌ log2(┌NRB/P┐+1C2)┐·NCluster[bits] (Equation 1)
Therefore, as shown in
The terminal can transmit uplink data according to the frequency resource assignment information reported from the base station as described above.
However, the conventional non-contiguous frequency transmission method has a problem that the number of signaling bits required to report frequency resource assignment information is large.
That is, as shown in above equation 1, the number of signaling bits increases in proportion to number of clusters NCluster. Therefore, when the number of signaling bits is reduced simply by making the maximum assignment bandwidth NRB [RB] narrow, it is not possible to perform fine-tuned assignment processing such as assigning a band, in which a terminal has better reception quality, to that terminal, so that, consequently, flexibility in frequency scheduling lowers and system throughput performance deteriorates. Further, even if the number of signaling bits is reduced simply by increasing RB assignment unit P, deterioration of system throughput is caused in the same way.
It is therefore an object of the present invention to provide a scheduling apparatus and a scheduling method for is making it possible to maintain system throughput and reduce the amount of signaling of frequency resource assignment information.
One aspect of a scheduling apparatus according to the present invention employs a configuration to comprise a scheduler that selects a maximum of one cluster band for each of a plurality of assignable ranges set in a system band, as assignment resources for a terminal subject to resource assignment, and generates assignment resource information containing information about the selected cluster band; and a transmission section that transmits the generated assignment resource information to the terminal subject to resource assignment; wherein while a first assignable range is the whole system band, a second assignable range is a partial band of the system band.
One aspect of a scheduling method according to the present invention employs a configuration to select a maximum of one cluster band for each of a plurality of assignable ranges set in a system band, as assignment resources for a terminal subject to resource assignment, and generate assignment resource information containing information about the selected cluster band; and while a first assignable range is the whole system band, a second assignable range is a partial band of the system band.
According to the present invention, it is possible to provide a scheduling apparatus and a scheduling method for making it possible to maintain system throughput and reduce the amount of signaling of frequency resource assignment information.
As a method of reducing the amount of signaling of frequency resource assignment information, it is possible to employ the following method.
That is, simply by limiting the assignable range for each cluster, flexibility in assignment of cluster bands lowers and consequently there is a possibility that system throughput cannot be maintained.
In view of these problems, the inventors have made the present invention.
Now, embodiments of the present invention will be described in detail with reference to the accompanying drawings. In embodiments, the same parts will be assigned the same reference numerals and overlapping explanations will be omitted.
RF reception section 101 performs reception processing, such as down-conversion and A/D conversion, on a signal received from terminal apparatus 200 (described later) via an antenna, and outputs the reception-processed signal to demultiplexing section 102.
Demultiplexing section 102 demultiplexes the signal input from RF reception section 101 to a pilot signal and a data signal. Then, demultiplexing section 102 outputs the pilot signal to DFT section 103 and outputs the data signal to DFT section 104.
DFT section 103 performs DFT processing on the pilot signal received from demultiplexing section 102 to convert a time domain signal into a frequency domain signal. Then, DFT section 103 outputs the pilot signal converted into a frequency domain to demapping section 105.
Demapping section 105 extracts a pilot signal corresponding to the transmission band of terminal apparatus 200 (described later) from the frequency-domain pilot signal received from DFT section 103, and outputs the pilot signal to channel estimation section 107.
Channel estimation section 107 estimates frequency variation in a channel (i.e. channel frequency response) and reception quality per frequency band, by performing correlation calculation on the reception pilot signal received from demapping section 105 and the transmission pilot signal that is known between base station apparatus 100 and terminal apparatus 200. Then, channel estimation section 107 outputs a channel estimation value, which is the result of this estimation, to frequency domain equalization section 108 and scheduling section 113.
DFT section 104 performs DFT processing on the data signal received from demulplexing section 102 to convert a time domain signal into a frequency domain signal. Then, DFT section 104 outputs the data signal converted into a frequency domain to demapping section 106.
Demapping section 106 extracts part of the data signal corresponding to the transmission band of terminal apparatus 200 from the signal received from DFT section 104, and outputs the extracted data signal to frequency domain equalization section 108.
Frequency domain equalization section 108 performs equalization processing on the data signal received from demapping section 106, using the channel estimation value (i.e. channel frequency response) received from channel estimation section 107. Then, frequency domain equalization section 108 outputs the signal obtained by equalization processing to IDFT section 109.
IDFT section 109 performs IDFT processing on the data signal input from frequency domain equalization section 108. Then, IDFT section 109 outputs the signal obtained by IDFT processing to demodulation section 110.
Demodulation section 110 performs demodulation processing on the signal received from IDFT section 109 and outputs the signal obtained by modulation processing to decoding section 111.
Decoding section 111 performs decoding processing on the signal received from demodulation section 110, and extracts the reception data.
Cluster assignable range setting section 112 holds information about the relationship between the assignable range applied to each of a plurality of clusters and the group of the assignable ranges corresponding to the number of clusters. Then, cluster assignable range setting section 112 outputs information about the group of assignable ranges corresponding to the number of clusters input (i.e. information about the bands of the assignable ranges that belong to that group (for example, the bandwidth and the position of frequency), to scheduling section 113.
Here, the upper limit value is set for the number of clusters to apply to a terminal subject to frequency assignment. Then, cluster assignable range setting section 112 receives as input the maximum number of clusters N (N is the maximum number of clusters that can be set for one terminal subject to assignment, which is predetermined by base station apparatus 100 or the system), which is the upper limit value, and outputs the information about the group of assignable ranges corresponding to that maximum number of clusters N, to scheduling section 113. That is, because the maximum number of clusters N is generally fixed, a fixed group is output to scheduling section 113. Details of this group of assignable ranges will be described later.
Scheduling section 113 assigns frequency resources to a terminal subject to frequency assignment, based on the number of clusters to assign to a terminal subject to assignment, reception quality information in the terminal subject to frequency assignment that is received from channel estimation section 107, and the assignable ranges forming the assignable range group received from cluster assignable range setting section 112. Specifically, scheduling section 113 determines a plurality of candidates for the cluster band based on the reception quality information received from channel estimation section 107, and, out of the plurality of cluster band candidates, selects a maximum of one cluster band candidate in each assignable range as an assignment cluster band. The upper limit value of the number of these assignment cluster bands is the maximum number of clusters N.
The cluster band information of the assignment cluster band thus assigned is reported to a terminal subject to assignment, as frequency scheduling information.
Encoding section 114 encodes transmission data containing the frequency scheduling information for a terminal subject to frequency assignment, and outputs the encoded data to modulation section 115.
Modulation section 115 modulates the encoded data received from encoding section 114 and outputs the modulated signal to RE transmission section 116.
RF transmission section 116 performs transmission processing, such as D/A conversion, up-conversion, and amplification, on the modulated signal received from modulation section 115, and transmits the obtained radio signal to terminal apparatus 200 from the antenna.
RF reception section 201 performs reception processing, such as down-conversion and A/D conversion, on a signal received via an antenna, and outputs the reception-processed signal to demodulation section 202.
Demodulation section 202 performs equalization processing and demodulation processing on the signal received from RF reception section 201, and outputs the signal thus processed to decoding section 203.
Decoding section 203 performs decoding processing on the signal received from demodulation section 202 and extracts control data including reception data and frequency scheduling information.
Encoding section 206 encodes transmission data and outputs the obtained encoded data to modulation section 207.
Modulation section 207 modulates the encoded data received from encoding section 206 and outputs the data-modulated signal to DFT section 208.
DFT section 208 performs DFT processing on the data-modulated signal received from modulation section 207 and outputs the obtained frequency domain data signal to mapping section 209.
Mapping section 209 maps the data signal received from DFT section 208 to the assignment cluster band received from transmission band setting section 205, and outputs the obtained signal to IDFT section 210.
Cluster assignable range setting section 204 performs the same processing as cluster assignable range setting section 112. That is, cluster assignable range setting section 204 holds information about the relationship between the assignable range applied to each of a plurality of clusters and the group of assignable ranges corresponding to the number of clusters applied. Then, cluster assignable range setting section 204 outputs information about the group of assignable ranges corresponding to the number of clusters indicated by input information about the number of clusters (i.e. information about the bands of the assignable ranges that belong to that group (for example, the bandwidth and the position of frequency)), to transmission band setting section 205.
Transmission band setting section 205 extracts the frequency scheduling information contained in the control data received from decoding section 203. Then, transmission band setting section 205 designates the assignment cluster band based on the information about the group of assignable ranges received from cluster assignable range setting section 204 and the frequency scheduling information extracted, and outputs the designated assignment cluster band to mapping section 209.
IDFT section 210 performs IDFT processing on the signal received from mapping section 209. Then, IDFT section 210 outputs the signal obtained by IDFT processing to RF transmission section 211.
RF transmission section 211 performs transmission processing, such as D/A conversion, up-conversion, and amplification, on the signal received from IDFT section 210, and transmits the obtained radio signal to base station apparatus 100 from the antenna.
An operation of a radio communication system formed with base station apparatus 100 and terminal apparatus 200 having the above configuration will be described.
Here, the reason that the upper limit can be set to the number of clusters is based on the probability of occurrence of the number of clusters required for non-contiguous assignment (see Non-Patent Literature 4).
Here, NRB(m) represents the maximum assignment bandwidth [RB] of cluster m. Therefore, in the assignable range group shown in
As is clear from the comparison of
When the assignable range group shown in
However, compared to the conventional method of assigning a cluster band shown in
As described above, according to the present embodiment, in base station apparatus 100, scheduling section 113 selects a maximum of one cluster band in each of a plurality of assignable ranges set in the system band, as assignment resources for a terminal subject to resource assignment, and generates assignment resource information containing information about the selected cluster; and encoding section 114, modulation section 115, and RF transmission section 116, as a transmission means, transmits the assignment resource information generated in scheduling section 113 to the terminal subject to resource assignment. Then, out of that plurality of assignable ranges, while the first assignable range is the whole system band, the second assignable range (corresponding to the assignable range for the second cluster or the assignable range for the third cluster in the above description) is the lower frequency band or the higher frequency band when the system band is divided into half.
By this means, it is possible to maintain system throughput by suppressing decrease in flexibility in assignment, and reduce the amount of signaling of frequency resource assignment information.
A case has been described with the above embodiment where the lower-frequency side partial band is the assignable range for the second cluster and the higher-frequency side partial band is the assignable range for the third cluster, when the system band is divided into two. However, the present invention is not limited to this, and it is possible to set the assignable range for the second cluster and the assignable range for the third cluster in the part not including both ends of the system band. In short, the present invention can be configured in any way as long as, while the first assignable range is the whole system band, the second assignable range that is different from the first assignable range (corresponding to the assignable range for the second cluster or the assignable range for the third cluster in the above description) is a partial band of the system band.
A case will be described with Embodiment 2 where the resource assignment units of the assignable range for the second cluster and the assignable range for the third cluster are set smaller than the resource assignment unit of the assignable range for the first cluster.
Cluster assignment unit setting section 301 outputs the same number of cluster assignment units as the number of clusters input, to scheduling section 302. Specifically, cluster assignment unit setting section 301 holds information about the relationship between the assignable range applied to each of a plurality of clusters and the resource assignment unit in each assignable range. Then, cluster assignment unit setting section 301 receives the information about the assignable range group output from cluster assignable range setting section 112, and outputs the resource assignment unit corresponding to each of a plurality of assignable ranges forming that assignable range group, to scheduling section 302. The resource assignment unit here indicates the unit of frequency resources assigned to a terminal, i.e. assignment granularity.
Here again, the upper limit value is set for the number of clusters to apply to a terminal subject to frequency assignment. Therefore, the resource assignment unit corresponding to each of the plurality of assignable ranges forming the fixed group is output to scheduling section 302.
Scheduling section 302 has the same function as scheduling section 113. However, scheduling section 302 uses the resource assignment unit corresponding to an arbitrary assignable range received from cluster assignment unit setting section 301, as a standard unit used when selecting an assignment cluster band in that arbitrary assignable range (i.e. frequency resource assignment unit).
Cluster assignment unit setting section 401 performs the same processing as cluster assignment unit setting section 301. That is, cluster assignment unit setting section 401 outputs the same number of cluster assignment units as the number of clusters input, to transmission band setting section 402. Specifically, cluster assignment unit setting section 401 holds information about the relationship between the assignable range applied to each of the plurality of clusters and the resource assignment unit in each assignable range. Then, cluster assignment unit setting section 401 receives the information about the assignable range group output from cluster assignable range setting section 204, and outputs the resource assignment unit corresponding to each of the plurality of assignable ranges forming that assignable range group, to transmission band setting section 402.
Transmission band setting section 402 extracts frequency scheduling information contained in control data received from decoding section 203. Then, transmission band setting section 402 designates assignment cluster bands based on the information about the assignable range group received from cluster assignable range setting section 204, the resource assignment unit in each assignable range received from cluster assignment unit setting section 401, and the extracted frequency scheduling information, and outputs the designated assignment cluster bands to mapping section 209.
Further, the first resource assignment unit used in the assignable range for the first cluster is different from the second resource assignment unit used in each of the assignable range for the second cluster and the assignable range for the third cluster. Specifically, the second resource assignment unit is smaller than the first resource assignment unit. Further, the size of the resource assignment unit is set according to the bandwidth of the assignable range to which the resource assignment unit is applied. That is, as the assignable range has a broader bandwidth, the resource assignment unit used in that assignable range is set larger.
Here, P(m) represents the assignment unit [RB] for cluster m. In the case of the assignable range group shown in
As is clear from the comparison of
As described above, according to the present embodiment, in base station apparatus 300, scheduling section 302 sets the second resource assignment unit of the second assignable range (corresponding to the assignable range for the second cluster or the assignable range for the third cluster in the above description) smaller than the first resource assignment unit of the first assignable range (corresponding to the assignable range for the first cluster in the above description).
By this means, the resource assignment unit is set small in the second assignable range having a narrow bandwidth, so that, even when the assignment granularity is set dense, it is possible to suppress increase of the number of signaling bits. Further, because the resource assignment unit is set large in the first assignable range having a broad bandwidth and the assignment granularity is set coarse, is possible to suppress increase of the number of signaling bits required for the whole assignable range group.
Further, it is possible to vary the assignment granularity depending on the assignable range. For example, the transmission bandwidth of VoIP data for transmitting speech data of a terminal used in the LTE system or the LTE-A system is narrow, being one or two RBs. Therefore, small available resources of 1 or 2 RBs frequently appears in the band in which VoIP data is transmitted. Therefore, by assigning the cluster bands selected in the above-described second assignable range (corresponding to the assignable range for the second cluster or the assignable range for the third cluster in the above description) to VoIP data transmission, it is possible to perform fine-tuned resource assignment to VoIP data transmission. Therefore, because it is possible to assign a terminal to the above-described available resources, the utilization rate of the frequency resources increases, making it possible to improve system throughput performance.
A case has been described with Embodiment 3 where a scheduling section adjusts the position of frequency of the second assignable range based on channel quality, and includes offset information about clearance between the adjusted position of frequency and the base position, in assignment resource information.
Offset setting section 501 determines the amount of offset of an assignable range having a narrower bandwidth than the bandwidth of the system band, out of a plurality of assignable ranges forming the assignable range group output from cluster assignable range setting section 112, based on the channel quality received from channel estimation section 107.
Scheduling section 502 adjusts the position of frequency of the assignable range having a narrower bandwidth than the bandwidth of the system band, out of a plurality of assignable ranges forming the assignable range group output from cluster assignable range setting section 112, based on the amount of offset received from offset setting section 501. Then, scheduling section 502 selects the assignment cluster bands using the assignable range group after adjustment of frequency, in the same way as scheduling section 113.
Offset setting section 601 extracts frequency scheduling information contained in the control data received from decoding section 203. Then, offset setting section 601 outputs the offset information contained in the extracted frequency scheduling information to transmission band setting section 602.
Transmission band setting section 602 adjusts the position of frequency forming the assignable range group received from cluster assignable range setting section 204, based on the input offset information. Then, transmission band setting section 602 converts the position of the assignment cluster band transmitted from the base station apparatus into the position of the assignable range after this adjustment of the position of frequency, and sets the assignment cluster band after the frequency position conversion in mapping section 209.
In base station apparatus 500, offset setting section 501 determines the amount of offset so that the band having good channel quality in a terminal subject to assignment is included in the assignable range. Here, the base position of the assignable range, which constitutes the standard when determining the amount of offset, is set at one end of the lower frequency side in the system band. In the channel quality shown in
Then, scheduling section 502 adjusts the position of the assignable range based on the amount of offset determined in offset setting section 501, and includes information about the amount of offset in assignment resource information. As described above, because information about the amount of offset is included in assignment resource information, in order to reduce an equivalent number of signaling bits to the number of reduced signaling bits achieved in Embodiment 1, it is prerequisite that the bandwidths of the assignable range for the second cluster and the assignable range for the third cluster described above are made narrower than the bandwidths shown in
As is clear from the comparison of
As described above, according to the present embodiment, in base station apparatus 500, channel estimation section 107 estimates channel quality of a terminal subject to resource assignment, in the system band; offset setting section 501 determines the amount of offset of the second assignable range (corresponding to the assignable range for the second cluster or the assignable range for the third cluster in the above description) based on the channel quality; and scheduling section 502 adjusts the position of frequency of the second assignable range to the position the amount of offset apart from the base position, and includes information about the amount of offset in assignment resource information.
By this means, it is possible to make an assignable range match a band having good channel quality, improving the channel quality of the assignment cluster band selected in that assignable range. Therefore, because it is possible to assign a band having good channel quality to a terminal subject to resource assignment, it is possible to reduce the probability that transmission errors will occur, making it possible to improve system throughput.
Further, here, the bandwidth of the second assignable range is set smaller than ½ of the bandwidth of the whole system band. By this means, it is possible to counterbalance the amount of increase of signaling bits corresponding to the information about the amount of offset.
A case has been described with the above embodiment where processing of adjusting the position of an assignable range based on channel quality is applied to base station apparatus 100 according to Embodiment 1. However, the present invention is not limited to this, and it is possible to apply processing of adjusting the position of an assignable range based on channel quality to base station apparatus 300 according to Embodiment 2.
A case will be described with Embodiment 4 where the position of frequency of the above-described second assignable range is changed between the first terminal subject to resource assignment and the second terminal subject to resource assignment. This information about the position of frequency is contained in assignment resource information as offset information, in the same way as in Embodiment 3.
Offset setting section 701 sets the different amounts of offset for the first terminal subject to resource assignment and the second terminal subject to resource assignment, to each of which the resources are assigned in the same period. Specifically, offset setting section 701 holds a table showing correspondence of a plurality of terminal IDs and information about the amount of offset corresponding to each terminal ID. This terminal ID is assigned to a terminal by base station apparatus 500, for example, at the time when that terminal in the cell of base station apparatus 500 makes initial access. Then, offset setting section 701 receives as input the terminal ID of the terminal subject to resource assignment, and outputs the information about the amount of offset corresponding to this terminal ID, to scheduling section 502. Here, the amount of offset is defined by per base station or by a system as a function of a terminal ID.
Offset setting section 801 performs the same processing as offset setting section 701. That is, offset setting section 801 holds a table showing correspondence of a plurality of terminal IDs and information about the amount of offset corresponding to each terminal ID. Then, offset setting section 801 receives as input the terminal ID of the terminal subject to resource assignment, and outputs the information about the amount of offset corresponding to this terminal ID, to transmission band setting section 602.
As described above, offset setting section 701 outputs the information about the amount of offset corresponding to a terminal ID of a terminal subject to resource assignment, to scheduling section 502. The information about the amount of offset includes the amount of offset for the above-described second assignable range. Therefore, as shown in
As described above, according to the present embodiment, the position of frequency of the second assignable range differs between the first terminal subject to resource assignment and the second terminal subject to resource assignment.
By this means, it is possible to disperse the positions of frequency of the assignable ranges for terminals in the cell, in the system band, so that it is possible to smooth the number of terminals that can be assigned per resource assignment unit, in the system band. By this means, it is possible to obtain constant multi-user diversity gain in the whole system band, making it possible to improve the utilization rate of the frequency resource in the cell. As a result of this, it is possible to improve system throughput.
Further, because information about the amount of offset is derived based on the terminal ID assigned to the terminal subject to resource assignment, the terminal subject to resource assignment can derive that information about the amount of offset on its own. Therefore, because it is not necessary to report the information about the amount of offset from a base station to a terminal, it is possible to reduce the number of signaling bits.
A case has been described with the above embodiment where processing of adjusting the position of the assignable range based on the different amounts of offset among a plurality of terminals subject to resource assignment, is applied to base station apparatus 100 according to Embodiment 1. However, the present invention is not limited to this, and it is possible to apply processing of adjusting the position of the assignable range based on the different amounts of offset among a plurality of terminals subject to resource assignment, to base station apparatus 300 according to Embodiment 2.
A bandwidth of the assignable range will be described with Embodiment 5. The base station apparatus and the terminal apparatus according to the present embodiment have the same configurations as base station apparatus 100 and terminal apparatus 200 according to Embodiment 1, and hereinafter explanations will be described with reference to
First, the number of signaling bits required per one cluster can be determined by equation 4.
[4]
Number of signaling bits per one cluster=┌log2(┌NRB/P┐+1C2)┐[bits] (Equation 4)
Further, when the number of signaling bits required is the same, it is preferable that the bandwidth of the assignable range is as broad as possible, from a viewpoint of flexibility in assignment. The reason is that system throughput improves more as assignment is performed more flexibly.
That is, when the target number of signaling bits is set for the second assignable range used by scheduling section 113, it is preferable that the bandwidth of the second assignable range used by scheduling section 113 matches the broadest bandwidth out of the bandwidths with which the number of signaling bits determined by equation 4 is equal to the above-described target number of signaling bits.
Further, it is possible to designate the bandwidth of the second assignable range used in scheduling section 113 as described below. That is, regarding the arbitrary number of signaling bits X (X is a natural number), NRB having the broadest bandwidth out of NRBs satisfying the right-hand side ≦2X in above equation 4 is the optimal bandwidth of the assignable range.
As shown in
As described above, according to the present embodiment, the bandwidth of the second assignable range is the broadest bandwidth out of a plurality of bandwidths with which the number of signaling bits determined using equation 4 is equal to the target number of signaling bits.
By this means, it is possible to efficiently improve the flexibility in assignment using the limited number of signaling bits, and consequently it is possible to improve system throughput efficiently.
(1) Cases have been described with Embodiments 1 to 5 where the maximum number of clusters is three. However, the present invention is not limited to this, and it is possible to use the maximum number of clusters that is four or greater.
(i) In
(ii) In
Even when the above-described assignable range group is used, it is possible to maintain system throughput performance and reduce the number of signaling bits.
(2) Further, it is possible to employ the maximum number of clusters of 2.
(3) A case has been described with Embodiment 5 where the condition in which the broadest bandwidth out of a plurality of bandwidths with which the number of signaling bits determined using equation 4 is equal to the target number of signaling bits is set as the bandwidths of the assignable ranges for the second cluster and the third cluster, is applied. However, the present invention is not limited to this, and it is possible to apply the above condition to the bandwidth of the assignable range for the first cluster.
In that case, when the target number of signaling bits for the assignable range for the first cluster is nine as shown in
Therefore, an optimal bandwidth of the assignable range for the first cluster when the target number of signaling bits is reduced by one to become eight, is shown in
(4) Also, although cases have been described with the above embodiments as examples where the present invention is configured by hardware, the present invention can also be realized by software.
Each function block employed in the description of each of the aforementioned embodiments may typically be implemented as an LSI constituted by an integrated circuit. These may be individual chips or partially or totally contained on a single chip. “LSI” is adopted here but this may also be referred to as “IC,” “system LSI,” “super LSI,” or “ultra LSI” depending on differing extents of integration.
Further, the method of circuit integration is not limited to LSI's, and implementation using dedicated circuitry or general purpose processors is also possible. After LSI manufacture, utilization of a programmable FPGA (Field Programmable Gate Array) or a reconfigurable processor where connections and settings of circuit cells within an LSI can be reconfigured is also possible.
Further, if integrated circuit technology comes out to replace LSI's as a result of the advancement of semiconductor technology or a derivative other technology, it is naturally also possible to carry out function block integration using this technology. Application of biotechnology is also possible.
The disclosure of Japanese Patent Application No. 2009-063030, filed on Mar. 16, 2009, including the specification, drawings and abstract, is incorporated herein by reference in its entirety.
A scheduling apparatus and a scheduling method according to the present invention are useful for maintaining system throughput and reducing the amount of signaling of frequency resource assignment information.
Number | Date | Country | Kind |
---|---|---|---|
2009-063030 | Mar 2009 | JP | national |
Filing Document | Filing Date | Country | Kind | 371c Date |
---|---|---|---|---|
PCT/JP2010/001839 | 3/15/2010 | WO | 00 | 9/14/2011 |