Patent Application
20120218943
I. Field
The present disclosure relates generally to communication, and more specifically to techniques for sending control information in a wireless communication system.
II. Background
Wireless communication systems are widely deployed to provide various communication services such as voice, video, packet data, messaging, broadcast, etc. These wireless systems may be multiple-access systems capable of supporting multiple users by sharing the available system resources. Examples of such multiple-access systems include Code Division Multiple Access (CDMA) systems, Time Division Multiple Access (TDMA) systems, Frequency Division Multiple Access (FDMA) systems, Orthogonal FDMA (OFDMA) systems, and Single-Carrier FDMA (SC-FDMA) systems.
A wireless communication system may include many base stations that can support communication for many terminals on the forward and reverse links. The forward link (or downlink) refers to the communication link from the base stations to the terminals, and the reverse link (or uplink) refers to the communication link from the terminals to the base stations. The system may utilize various control channels to support data transmission on the forward and reverse links. For example, a base station may transmit control information to assign resources to terminals, to acknowledge packets received from the terminals, to inform the terminals of operating conditions at the base station, etc. The control information sent by the base station, although beneficial, represent overhead in the system.
There is therefore a need in the art for techniques to efficiently send control information in a wireless communication system.
Techniques for utilizing control resources to send control information in a wireless communication system are described herein. A control segment may be used to send different control channels and may include L tiles, where L≧1. Each tile may include a plurality of transmission units, and each transmission unit may correspond to (e.g., may be mapped to) one subcarrier in one symbol period. A plurality of control resources may be defined for the control segment and may be assigned to the control channels and used to send control information.
In one aspect, the plurality of control resources may be mapped to the transmission units for the control segment in a manner to achieve scalability for the control segment, diversity for each control resource, symmetric mapping of the plurality of control resources across the L tiles, localized mapping for sets of control resources, distributed mapping for consecutive control resources, or any combination of these features. In one design of symmetric mapping, multiple sets of S control resources may be formed for the plurality of control resources, where S≧1. Each batch of L consecutive sets of S control resources may be mapped to S transmission units at the same location in the L tiles. In one design of localized mapping, S>1, and each set of S control resources may be mapped to a cluster of S adjacent transmission units in one tile. In one design of distributed mapping, S=1, and consecutive control resources may be mapped to different tiles. In one mapping design that may be used for both localized and distributed mapping, the multiple sets of S control resources may be traversed, where S>1, and each set of S control resources may be mapped to S transmission units in one tile determined by cycling through the L tiles. The first S control resources may map to tile 0, the next S control resources may map to tile 1, etc. A tradeoff between localization versus diversity may be obtained by choosing a proper value of S. In one design of diversity, each control resource may be mapped to multiple (e.g., three) transmission units in different locations of at least one tile to obtain diversity for the control resource.
In one design, a tile index h and a transmission unit index r for a control resource index R may be determined based on a mapping scheme. A control resource with index R may be mapped to a transmission unit with index r in a tile with index h. Control information may be sent or received via the control resource.
In another aspect, transmission units available for a given control channel may be determined from among all transmission units for a control segment and may exclude transmission units unavailable for the control channel (e.g., transmission units used for pilot, other control channels, and/or other transmissions). Multiple packets may be sent on the control channel in the control segment. Each packet may be mapped to a different set of transmission units, which may be distributed across the transmission units available for the control channel. In one design, the plurality of transmission units in each tile may be traversed, and each transmission unit may be assigned to one packet by cycling through the multiple packets. Each packet may be sent via its set of transmission units.
Various aspects and features of the disclosure are described in further detail below.
The techniques described herein may be used for various wireless communication systems such as CDMA, TDMA, FDMA, OFDMA and SC-FDMA systems. The terms “system” and “network” are often used interchangeably. A CDMA system may implement a radio technology such as cdma2000, Universal Terrestrial Radio Access (UTRA), etc. An OFDMA system may implement a radio technology such as Ultra Mobile Broadband (UMB), Evolved ULTRA (E-UTRA), IEEE 802.16, IEEE 802.20, Flash-OFDM®, etc. UTRA and E-UTRA are described in documents from an organization named “3rd Generation Partnership Project” (3GPP). cdma2000 and UMB are described in documents from an organization named “3rd Generation Partnership Project 2” (3GPP2). These various radio technologies and standards are known in the art. For clarity, certain aspects of the techniques are described below for UMB, and UMB terminology is used in much of the description below. UMB is described in 3GPP2 C.S0084-001, entitled “Physical Layer for Ultra Mobile Broadband (UMB) Air Interface Specification,” August 2007, which is publicly available.
Terminals 120 may be dispersed throughout the system, and each terminal may be stationary or mobile. A terminal may also be referred to as an access terminal (AT), a mobile station, a user equipment, a subscriber unit, a station, etc. A terminal may be a cellular phone, a personal digital assistant (PDA), a wireless communication device, a wireless modem, a handheld device, a laptop computer, a cordless phone, etc. A terminal may communicate with zero, one, or multiple base stations on the forward and/or reverse link at any given moment.
For a centralized architecture, a system controller 130 may couple to base stations 110 and provide coordination and control for these base stations. System controller 130 may be a single network entity or a collection of network entities. For a distributed architecture, the base stations may communicate with one another as needed.
The time frequency resources in each PHY frame may be partitioned into tiles. A tile may also be referred to as a time frequency block, a resource block, etc. A tile may cover a particular time and frequency dimension, which may be fixed or configurable. In one design, a tile includes physical resources, e.g., a block of subcarriers in one or more symbol periods. In another design, a tile includes logical resources that may be mapped to physical resources based on any mapping. In one design, the system bandwidth may be partitioned into multiple (K) orthogonal subcarriers with orthogonal frequency division multiplexing (OFDM). K hop-ports may be defined and may be mapped to the K subcarriers based on a known mapping. The tiles may be defined based on either subcarriers (which are physical resources) or hop-ports (which are logical resources).
Referring back to
The system may utilize a set of control channels to send different types of control information on the forward link. Table 1 lists an example set of control channels and provides a short description of each control channel. These control channels are described in detail in the aforementioned 3GPP2 C.S0084-001.
In one design, the control channels may be sent in an FL control segment in each PHY frame. The FL control segment may include a sufficient amount of resources, e.g., a sufficient number of tiles, to carry the control information for all of the control channels.
In one design, the common segment may be partitioned into NFLCS FLCS resources, where NFLCS may be dependent on the number of FLCS tiles for the common segment and possibly other factors. The FLCS resources are logical resources that may simplify the allocation and use of the common segment. The FLCS resources may be mapped to transmission units in the common segment in various manners. The resource mapping may be such that the common segment can achieve one or more of the following:
In one design, third order diversity may be obtained by mapping each FLCS resource to three transmission units in up to three different FLCS tiles. Other diversity orders (e.g., 2, 4, etc.) may also be obtained by mapping each FLCS resource to different numbers of transmission units. For clarity, much of the following description assumes FLCS resource mapping to obtain third order diversity.
In a first FLCS resource mapping scheme, the FLCS resources are mapped to transmission units in the common segment in a manner to achieve scalability, third order diversity, and localized mapping. The first FLCS resource mapping scheme may also be referred to as a Block Resource Channel (BRCII) mapping scheme.
For the first FLCS resource mapping scheme, each FLCS tile may be as shown in
N
FLCS=└110/3┘×L=36×L, Eq (1)
where “└ ┘” denotes a floor operator. The NFLCS FLCS resources may be assigned indices of 0 through NFLCS−1.
In the design shown in
The design shown in
In one design, localized mapping may be achieved by mapping four consecutive FLCS resources to a 2×2 cluster of four transmission units. Referring back to
For the first FLCS resource mapping scheme, FLCS resource R may be mapped to three transmission units according to the following procedure.
1. Define h=└R/4┘ mod L. Eq (2)
2. Define r=4×R/(4L)J+(R mod 4). Eq (3)
3. For k=0, 1, 2}
c. Let hk=(h—k)mod L. Eq (4)
For clarity, the following terms are used in the description herein. “Traversing” refers to going through a set of elements only once, e.g., from the first element to the last element in the set. “Cycling through” refers to going through a set of elements multiple times, e.g., from the first element to the last element in the set each time.
Each FLCS resource is mapped to three tile segments 0, 1 and 2 in up to three different FLCS tiles with indices h0, h1 and h2, which are computed as shown in equation (4). h0 is equal to the starting FLCS tile index h provided by equation (2). h1 and h2 are for the next two FLCS tiles, which may wrap around to 0 after reaching L−1 due to the mod L operation. h2 may be equal to h if L=2, and h1 and h2 may be equal to h if L=1.
Each FLCS resource is mapped to three transmission units with the same index r in the three tile segments 0, 1 and 2. For each tile segment k, where kε{0, 1, 2}, function FPk( ) provides the hop-port pk for transmission unit r, and function FSk( ) provides the OFDM symbol period tk, for transmission unit r. Functions FP0( ) and FS0( ) for tile segment 0 may be determined by the left tile segment in
In a second FLCS resource mapping scheme, the FLCS resources are mapped to transmission units in the common segment in a manner to achieve scalability, third order diversity, and avoidance of forbidden zone. The second FLCS resource mapping scheme may also be referred to as a Distributed Resource Channel (DRCH) mapping scheme.
For the second FLCS resource mapping scheme, the total number of FLCS resources for the common segment may be given as:
N
FLCS
=└N
AVAIL/3┘×L. Eq (5)
The NFLCS FLCS resources may be assigned indices of 0 through NFLCS−1. The number of FLCS resources per FLCS tile, M, may be given as:
M=└N
AVAIL/3┘×L. Eq (6)
In the design shown in
For the second FLCS resource mapping scheme, FLCS resource R may be mapped to three transmission units according to the following procedure.
1. Define h=R mod L. Eq (7)
2. Define r=1R/L. Eq (8)
3. For k={0, 1, 2}
a. Let rk=k×└NAVAIL/3┘+r. Eq (9)
b. Let hk=(h+k)mod L. Eq (10)
c. The transmission unit with index rk in the FLCS tile with index hk is allocated to the FLCS resource with index R.
Each FLCS resource may be mapped to three different transmission units with indices r0, r1 and r2 in up to three different FLCS tiles with indices h0, h1 and h2, respectively, which are computed as shown in equations (9) and (10). h0 is equal to the starting FLCS tile index h provided by equation (7). h1 and h2 are for the next two FLCS tiles, which may wrap around to 0 after reaching L−1 due to the mod L operation. r0 is equal to the transmission unit index r provided by equation (8). h2 may be equal to h if L=2, and h1 and h2 may be equal to h if L=1. r1 is equal to r+M, and r2 is equal to r+2M. FLCS resource R is mapped to transmission unit r0 in FLCS tile h0, transmission unit r1 in FLCS tile h1, and transmission unit r2 in FLCS tile h2.
For the second FLCS resource mapping scheme, transmission units 0 through M−1 may be considered as belonging to tile segment 0, transmission units M through 2M−1 may be considered as belonging to tile segment 1, and transmission units 2M through 3M−1 may be considered as belonging to tile segment 3. Each tile segment may include M transmission units. The second FLCS resource mapping scheme may be similar to the first FLCS resource mapping scheme, albeit with different FHk( ) and FSk( ) mapping functions for the three tile segments.
The system may support only the first FLCS resource mapping scheme, only the second FLCS resource mapping scheme, or both mapping schemes. If both mapping schemes are supported, then either the first or second FLCS resource mapping scheme may be selected for use. For example, a parameter UseDRCHForFLCS may be set to 0 to select the first FLCS resource mapping scheme or to 1 to select the second FLCS resource mapping scheme.
Two FLCS resource mapping schemes have been described above for the common segment. The FLCS resources may also be mapped to the available transmission units in the L FLCS tiles for the common segment in other manners based on other FLCS resource mapping schemes.
The control channels in Table 1 may be sent on the common segment in various manners. The number of FLCS resources to assign to each control channel may be dependent on the amount of control information to send on that control channel as well as the manner in which the control information is sent. In one design, the first seven control channels in Table 1 are sequentially assigned FLCS resources. Table 2 shows a design for sequentially assigning FLCS resources to the seven control channels.
In one design, Na ACK values may be sent on the F-ACKCH, where Na≧0, and up to four ACK values may be sent in a set of four FLCS resources. A sequence of 12 symbols may be generated for each ACK value and denoted as Z00, Z01, Z02, Z10, Z11, Z12, Z20, Z21, Z22, Z30, Z31, Z32}, where Zij is the symbol to be sent on FLCS resource i in the j-th FLCS tile. The symbol sequence may be generated based on the ACK value, a sector identifier (ID) for a sector sending the ACK value, and a Medium Access Control (MAC) ID of a recipient terminal. Four 4-chip orthogonal sequences (e.g., four columns of a 4×4 DFT matrix) may be used for four ACK values that may be sent simultaneously on the same set of FLCS resources. The symbol sequence for each ACK value may be generated based on the orthogonal sequence for that ACK value. For each ACK value, each set of four symbols Z0j, Z1j, Z2j and Zij may be generated based on the orthogonal sequence for that ACK value and sent on four adjacent transmission units in one FLCS tile j.
In one design, Nb start of packet (SP) values may be sent on the F-SPCH, where Nb≧0, and up to four SP values may be sent in a set of four FLCS resources. A sequence of 12 symbols may be generated for each SP value based on that SP value and the sector ID, e.g., in similar manner as the ACK values. Four 4-chip orthogonal sequences may be used for up to four SP values that may be sent simultaneously on the same set of four FLCS resources.
In one design, Nc reverse activity bit (RAB) values may be sent on the F-RABCH, where Nc>0, and each RAB value may be sent in two FLCS resources. A sequence of 6 symbols {c0, c1, c2, c3, c4, c5} may be generated for each RAB value based on that RAB value and the sector ID. The symbol sequence may be sent on six transmission units for two FLCS resources.
In one design, Nd PQI reports may be sent on the F-PQICH, where Nd>0 and each PQI report may be sent in two FLCS resources. A PQI report may include a 4-bit PQI value and may be encoded and mapped to a sequence of 6 symbols {c0, c1, c2, c3, c4, c5} based on that PQI value, the sector ID, and the MAC ID of the recipient terminal. The symbol sequence for each PQI report may be sent on six transmission units for two FLCS resources.
In one design, Ne fast OSI reports may be sent on the F-FOSICH, where Nc≧0, and each fast OSI report may be sent in two FLCS resources. A fast OSI report may include a 4-bit fast OSI value and may be encoded and mapped to a sequence of 6 symbols {c0, c1, c2, c3, c4, C5}based on that fast OSI value and the sector ID. The symbol sequence for each fast OSI report may be sent on six transmission units for two FLCS resources. To reduce transmit power, a fast OS value of ‘0000’, which is most likely to be sent, may be mapped to a sequence of symbols with zero value.
In one design, Nf interference-over-thermal (IOT) reports may be sent on the F-FIOTCH, where Nf≧0, and each IOT report may be sent in two FLCS resources. An IOT report may include a 4-bit IOT value and may be encoded and mapped to a sequence of 6 symbols {c0, c1, c2, c3, C4, c5}based on that IOT value and the sector ID. The symbol sequence for each IOT report may be sent on six transmission units for two FLCS resources.
In one design, Ng power control (PC) bits may be sent on the F-PCCH, where Ng≧0, and up to three PC bits may be sent on one FLCS resource. A symbol may be generated for each PC bit based on that PC bit and the sector ID. Up to three symbols for up to three PC bits may be sent on three transmission units for one FLCS resource.
Table 2 shows a specific design for assigning FLCS resources to the control channels. In this design, control channels that benefit from localized mapping, such as the F-ACKCH and F-SPCH, are allocated FLCS resources first. These FLCS resources are mapped to adjacent transmission units. Control channels that do not benefit from localized mapping, such as the F-PCCH, are allocated FLCS resources last. These FLCS resources may be mapped to transmission units 32 through 35 located throughout the FLCS tiles. The FLCS resources may also be assigned to the control channels in other manners.
The F-SCCH may be sent on the common segment or the K LAB segments in various manners. In one design, the F-SCCH may be sent on the common segment if either (i) the first FLCS resource mapping scheme is used and no LAB segments are present or (ii) the second FLCS resource mapping scheme is used.
In one design, the F-SCCH may carry a variable number of packets. Each packet may be encoded and mapped to NSYM symbols with QPSK or to NSYM/2 symbols with 16-QAM. Thus, one packet may be sent in NSYM transmission units with QPSK, and two packets may be sent in Nsu transmission units with 16-QAM. P packet-pairs may be sent on the F-SCCH, where P may be dependent on the number of symbols per packet-pair and the number of transmission units available for the F-SCCH. Each packet-pair may include either one packet sent with QPSK and having an index (a, 0) or two packets sent with 16-QAM and having indices (a, 0) and (a, 1), where aε(0, . . . , P−1 is an index for packet-pair, and 0 and 1 denote packets 0 and 1 (if applicable) for the packet-pair.
In a first F-SCCH mapping scheme, the P packet-pairs may be mapped to transmission units in the L FLCS tiles of the common segment according to the foil owing procedure.
1. Initialize the hop-port counter i, block counter k, OFDM symbol counter j to 0.
2. Initialize modulation symbol index p(n)=0, for n=0, 1, 2, . . . , P−1.
3. If hop-port counter i is a usable hop-port for the F-SCCH,
a. Define a=(k+j±i)mod P. Eq (11)
Define b=p(a)mod 2 otherwise. Eq (12)
4. Increment i by 1. If i=16, set k=k+1 and set i=0.
5. If k≧L, set k=0 and increment j by 1.
6. If j≧8, exit. Otherwise go to step 3.
For the first F-SCCH mapping scheme, the procedure starts at OFDM symbol period 0, traverses through all 16 hop-ports for each of the L, FLCS tiles, and maps one packet-pair to each transmission unit. The packet-pair mapped to the transmission unit in hop-port i of OFDM symbol period j in FLCS tile k is determined by equation (11). Equation (11) cycles through the P packet-pairs as hop-port index i is incremented.
A counter p(a) is maintained for each packet-pair and indicates the next symbol to send in the next transmission unit available for that packet-pair. Counter p(a) for each packet-pair is initialized to 0. Thereafter, whenever packet-pair a is mapped to an available transmission unit and QPSK is used, then symbol p(a) of packet al. is mapped to this transmission unit, and index p(a) is incremented. If 16-QAM is used, then symbols from two packets in the packet-pair are alternately mapped to the available transmission units for this packet-pair, e.g., a symbol from packet (a, 0) is mapped to an available transmission unit for packet-pair a, then a symbol from packet (a, 1) is mapped to the next available transmission unit for packet-pair a, etc.
After traversing through all transmission units/hop-ports in one OFDM symbol period, the procedure traverses through all transmission units in the next OFDM symbol period and repeats the mapping. By traversing through all transmission units in all L FLCS tiles of the common segment, each available transmission unit may be identified and used for the F-SCCH.
For simplicity,
The F-SCCH may also be sent in the K LAB segments. In one design, P packet-pairs for the F-SCCH may be sent in each LAB segment comprising 3 FLCS tiles, where P may be dependent on the number of symbols per packet-pair and the number of available transmission units per LAB segment. A total of P-K packet-pairs with indices of 0 through P-K−1 may be sent in the K LAB segments. Each packet-pair may include either one packet sent with QPSK and having an index (a, 0) or two packets sent with 16-QAM and having indices (a, 0) and (a, 1), where a {0, . . . , P·K−1} is an index for packet-pair, and 0 and 1 denote packets 0 and 1 (if applicable) for the packet-pair.
In a second F-SCCH mapping scheme, P packet-pairs with indices of q·P to (q+1)·P−1 may be mapped to transmission units in the three FLCS tiles of LAB segment q, for qε{0, . . . , K−1}, according to the following procedure.
1. Initialize the hop-port counter i, block counter k, OFDM symbol counter j to 0.
2. Initialize modulation symbol index p(n)=0, for n=q·P, . . . , (q+1)·P−1.
3. If hop-port counter i is a usable hop-port for the F-SCCH,
a. Define a=[(k+j+i)mod P]+q·P. Eq (13)
Define b=p(a)mod 2 otherwise. Eq (14)
4. Increment i by 1. If i=16, set k=k+1 and set i=0.
5. If k≧3, set k=0 and increment j by 1.
6. If j≧8, exit. Otherwise go to step 3.
The second F-SCCH mapping scheme is similar to the first F-SCCH mapping scheme with the following differences. First, the P packet-pairs for LAB segment q are mapped to three FLCS tiles for LAB segment q in the second scheme whereas the P packet-pairs for the F-SCCH are mapped to L FLCS tiles for the common segment in the first scheme. Second, the available transmission units in the three FLCS tiles for LAB segment q for the second scheme may be different from the available transmission units in the L FLCS tiles for the common segment in the first scheme. Third, index a keeps track of the P packets sent in each LAB segment for the second scheme and keeps track of the P packets for the F-SCCH in the first scheme. For both schemes, the P packet-pairs are cycled through and mapped to different transmission units by traversing through these transmission units in a predetermined order. These two schemes distribute the symbols for each packet approximately uniformly across each FLCS tile used for the packet.
Two F-SCCH mapping schemes have been described above for the F-SCCH. The packets for the F-SCCH may also be mapped to the available transmission units based on other mapping schemes. In another F-SCCH mapping scheme, the available transmission units may be determined initially, and the P packet-pairs may be sequentially mapped to these available transmission units. In this scheme, a single counter p(a) may be maintained for all P packet-pairs.
In one design of symmetric mapping, multiple sets of S control resources may be formed for the plurality of control resources, where S≧1. Each batch of L consecutive sets of S control resources may be mapped to S transmission units at the same location in the L tiles. Different batches of L consecutive sets of S control resources may be mapped to different locations of the L tiles.
In one design of localized mapping, multiple sets of S control resources may be formed for the plurality of control resources, where S>1. Each set of S control resources may be mapped to a cluster of S adjacent transmission units in each of at least one tile. The multiple sets of S control resources may be traversed, and each set of S control resources may be mapped to at least one tile determined by cycling through the L tiles. In one design, S=4, and each set of four control resources may be mapped to a cluster of four adjacent transmission units in each of at least one tile, e.g., as shown in
The control resource with index R may be mapped to multiple (e.g., three) transmission units in at least one tile among the L tiles to obtain diversity for the control resource. The multiple transmission units may be in different locations of the at least one tile. The indices of the multiple transmission units may be determined based on the transmission unit index r.
In one design of diversity, each tile may be associated with multiple tile segments, and each tile segment may include a different subset of the plurality of transmission units in the tile. The transmission units in each tile segment may have pre-assigned indices, e.g., as shown in
In another design of diversity, transmission units available for use in each tile may be assigned unique indices. The control resource with index R may be mapped to multiple transmission units with different indices in at least one tile. The indices of the multiple transmission units may be determined based on the transmission unit index r and may be spaced apart by M, e.g., as shown in
The plurality of control resources may be assigned to a plurality of control channels, one control channel at a time and in a predetermined order. A control channel relying on localized mapping may be assigned control resources first, and a control channel not relying on localized mapping may be assigned control resources later.
A set of transmission units for a packet may be determined from among the transmission units available for the control channel and may be distributed across these available transmission units (block 1414). The control segment may include at least one tile, and each tile may include a plurality of transmission units. In one design, the plurality of transmission units in each tile may be traversed, and each transmission unit may be assigned to one packet among multiple packets by cycling through the multiple packets, e.g., as shown in
The modules in
At terminal 120, an antenna 1652 may receive the forward link signal from base station 110 and provide a received signal to a receiver (RCVR) 1654. Receiver 1654 may condition and digitize the received signal and provide samples. A received (RX) data processor 1656 may perform demodulation on the samples (e.g., for OFDM) and demodulate and decode the resultant symbols to obtain decoded data and control information. Processor 1656 may provide the decoded data to a data sink 1658 and the decoded control information to a controller/processor 1660.
On the reverse link, a TX data processor 1674 at terminal 120 may receive traffic data from a data source 1672 and control information from controller/processor 1660. The data and control information may be processed (e.g., encoded, symbol mapped, and modulated) by TX data processor 1674 and further conditioned by a transmitter 1676 to generate a reverse link signal, which may be transmitted via antenna 1652. At base station 110, the reverse link signals from terminal 120 and other terminals may be received by antenna 1618, conditioned by a receiver 1632, and demodulated and decoded by an RX data processor 1634.
Controllers/processors 1620 and 1660 may direct the operation at base station 110 and terminal 120, respectively. Controller/processor 1620 may direct transmission of data and control information on the forward link and may determine the control resources to use for each control channel. Controller/processor 1620 and/or 1660 may perform process 1200 in
The techniques described herein may be implemented by various means. For example, these techniques may be implemented in hardware, firnmware, software, or a combination thereof. For a hardware implementation, the processing units used to perform the techniques at an entity (e.g., a base station or a terminal) may be implemented within one or more application specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field programmable gate arrays (FPGAs), processors, controllers, micro-controllers, microprocessors, electronic devices, other electronic units designed to perform the functions described herein, a computer, or a combination thereof.
For a firmware and/or software implementation, the techniques may be implemented with code (e.g., procedures, functions, modules, instructions, etc.) that performs the functions described herein. In general, any computer/processor-readable medium tangibly embodying firmware and/or software code may be used in implementing the techniques described herein. For example, the firmware and/or software code may be stored in a memory (e.g., memory 1622 or 1662 in
The previous description of the disclosure is provided to enable any person skilled in the art to make or use the disclosure. Various modifications to the disclosure will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other variations without departing from the spirit or scope of the disclosure. Thus, the disclosure is not intended to be limited to the examples and designs described herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
The present application is a divisional of U.S. patent application Ser. No. 11/968,642, entitled “CONTROL RESOURCE MAPPING FOR A WIRELESS COMMUNICATION SYSTEM,” inventors Aamod Khandekar et al., filed Jan. 2, 2008, which claims priority to provisional U.S. Application Ser. No. 60/883,387, entitled “METHOD AND APPARATUS FOR UTILIZING OTHER SECTOR INTERFERENCE (OSI) INDICATION,” filed Jan. 4, 2007, and provisional U.S. application Ser. No. 60/883,758, entitled “WIRELESS COMMUNICATION SYSTEM,” filed Jan. 5, 2007, all assigned to the assignee hereof and incorporated herein by reference.
| Number | Date | Country | |
|---|---|---|---|
| 60883387 | Jan 2007 | US | |
| 60883758 | Jan 2007 | US |
| Number | Date | Country | |
|---|---|---|---|
| Parent | 11968642 | Jan 2008 | US |
| Child | 13465943 | US |
