Method and system for mapping HARQ-ACK bits
A subscriber station is provided. The subscriber station includes a transmit path circuitry to transmit uplink control information (UCI) in a subframe comprising one or more resource blocks, each resource block comprising S SC-FDM symbols. Each of the S symbols comprises N virtual subcarriers, and each subcarrier of each symbol comprises a resource element. The subscriber station also includes a UCI symbol allocator to allocate a first vector sequence of HARQ-ACK bits to a control region of each of four symbols of a resource block, the control region allocated for HARQ-ACK bits. The UCI symbol allocator also allocates a second vector sequence of HARQ-ACK bits to a control region of a fifth symbol of the resource block when a condition is met. The control region of the fifth symbol can be allocated for rank information (RI) bits.
1. A subscriber station comprising:
a transmit path circuitry configured to transmit uplink control information (UCI) in a subframe comprising one or more resource blocks, each resource block comprising S single carrier frequency division multiplexing (SC-FDM) symbols, each of the S single carrier frequency division multiplexing (SC-FDM) symbols comprising N virtual subcarriers, and each virtual subcarrier of each symbol comprises a resource element;
and a UCI symbol allocator configured to: allocate a first vector sequence of hybrid automatic-repeat-request acknowledgement (HARQ-ACK) bits to a control region of each of four symbols of a resource block, the control region allocated for HARQ-ACK bits, and allocate a second vector sequence of HARQ-ACK bits to a control region of a fifth symbol of the resource block when a condition is met, wherein the control region of the fifth symbol can be allocated for rank information (RI) bits.
2. The subscriber station in accordance with claim 1 , wherein the condition is met when Q′ ACK is greater than 4R′ mux , where Q′ ACK =Q ACK /Q m , where Q ACK denotes a total number of coded HARQ-ACK information bits in both the first vector sequence and the second vector sequence, Q m denotes a number of bits per symbol, and
where R′ mux =R mux /Q m ,
R mux =(H″·Q m )/C mux , H″=H′+Q′ RI , Q′ RI =Q RI /Q m , and C mux =N symb PUSCH (the number of symbols in a physical uplink shared channel, and
where Q RI denotes a total number of coded rank information (RI) bits in the subframe.
3. The subscriber station in accordance with claim 1 , wherein the condition is met when a particular state is indicated by an information element in at least one of a radio resource control (RRC) signaling and a physical layer (PHY) signaling.
4. The subscriber station in accordance with claim 1 , wherein the condition is met when RI bits are not scheduled in the subframe.
5. The subscriber station in accordance with claim 1 , wherein the condition is met when a channel quality information (CQI)/precoding matrix information (PMI) report is not scheduled in the subframe, and wherein the control region of the fifth symbol is allocated for PMI/CQI bits.
6. The subscriber station in accordance with claim 5 , wherein the CQT/PMI report is an aperiodic CQI/PMI report.
7. The subscriber station in accordance with claim 1 wherein the condition is met when a single input multiple output physical uplink shared channel (SIMO PUSCH) is scheduled to carry the HARQ-ACK information bits.
8. The subscriber station in accordance with claim 1 , wherein the second vector sequence of HARQ-ACK bits is allocated to the control region of the fifth symbol in a reverse order as the RI bits are allocated starting from a first virtual subcarrier and moving downwards.
9. The subscriber station in accordance with claim 1 , wherein the second vector sequence of HARQ-ACK bits is allocated to the control region of the fifth symbol in a same order as the RI bits are allocated starting from a last virtual subcarrier and moving upwards.
10. The subscriber station in accordance with claim 1 , wherein the second vector sequence of HARQ-ACK bits is allocated to the control region of the fifth symbol in a same order as the RI bits are allocated following a largest-numbered RI symbol vector and moving upwards.
11. A method of operating a subscriber station, the method comprising:
transmitting uplink control information (UCI) in a subframe comprising one or more resource blocks, each resource block comprising S single carrier frequency division multiplexing (SC-FDM) symbols, each of the S single carrier frequency division multiplexing (SC-FDM) symbols comprising N virtual subcarriers, and each subcarrier of each symbol comprises a resource element;
allocating a first vector sequence of hybrid automatic-repeat-request acknowledgement (HARQ-ACK) bits to a control region of each of four symbols of a resource block, the control region allocated for HARQ-ACK bits; and
allocating a second vector sequence of HARQ-ACK bits to a control region of a fifth symbol of the resource block when a condition is met, wherein the control region of the fifth symbol can be allocated for rank information (RI) bits.
12. The method in accordance with claim 11 , wherein the condition is met when Q′ ACK is greater than 4R′ mux , where Q′ ACK =Q ACK /Q m , where Q ACK denotes a total number of coded HARQ-ACK information bits in both the first vector sequence and the second vector sequence, Q m denotes a number of bits per symbol, and
where R′ mux =R mux /Q m , where R mux =(H″·Q m )/C mux , H″=H′+Q′ RI , Q′ RI =Q RI /Q m , and C mux =N symb PUSCH (the number of symbols in a physical uplink shared channel, and where Q RI denotes a total number of coded rank information (RI) bits in the subframe.
13. The method in accordance with claim 11 , wherein the condition is met when a particular state is indicated by an information element in at least one of a radio resource control (RRC) signaling and a physical layer (PHY) signaling.
14. The method in accordance with claim 11 , wherein the condition is met when RI bits are not scheduled in the subframe.
15. The method in accordance with claim 11 , wherein the condition is met when a channel quality information (CQI)/precoding matrix information (PMI) report is not scheduled in the subframe, and
wherein the control region of the fifth symbol is allocated for PMI/CQI bits.
16. The method in accordance with claim 15 , wherein the CQI/PMI report is an aperiodic CQI/PMI report.
17. The method in accordance with claim 11 , wherein the condition is met when a single input multiple output physical uplink shared channel (SIMO PUSCH) is scheduled to carry the HARQ-ACK information bits.
18. The method in accordance with claim 11 , wherein the second vector sequence of HARQ-ACK bits is allocated to the control region of the fifth symbol in a reverse order as the RI bits are allocated starting from a first virtual subcarrier and moving downwards.
19. The method in accordance with claim 11 , wherein the second vector sequence of HARQ-ACK bits is allocated to the control region of the fifth symbol in a same order as the RI bits are allocated starting from a last virtual subcarrier and moving upwards.
20. The method in accordance with claim 11 , wherein the second vector sequence of HARQ-ACK bits is allocated to the control region of the fifth symbol in a same order as the RI bits are allocated following a largest-numbered RI symbol vector and moving upwards.
21. A base station comprising:
a receive path circuitry configured to receive: uplink control information (UCI) in a subframe comprising one or more resource blocks, each resource block comprising S single carrier frequency division multiplexing (SC-FDM) symbols, each of the S single carrier frequency division multiplexing (SC-FDM) symbols comprising N virtual subcarriers, and each subcarrier of each symbol comprises a resource element;
a first vector sequence of hybrid automatic-repeat-request acknowledgement (HARQ-ACK) bits in a control region of each of four symbols of a resource block, the control region allocated for HARQ-ACK bits; and
a second vector sequence of HARQ-ACK bits in a control region of a fifth symbol of the resource block when a condition is met,
wherein the control region of the fifth symbol can be allocated for rank information (RI) bits.
22. The base station in accordance with claim 21 , wherein the condition is met when Q′ ACK is greater than 4R′ mux , where Q′ ACK =Q ACK /Q m , where Q ACK denotes a total number of coded HARQ-ACK information bits in both the first vector sequence and the second vector sequence, Q m denotes a number of bits per symbol, and
where R′ mux =R mux /Q m , where R mux =(H″·Q m )/C mux , H″=H′+Q′ RI , Q′ RI =Q RI /Q m , and C mux =N symb PUSCH (the number of symbols in a physical uplink shared channel, and
where Q RI denotes a total number of coded rank information (RI) bits in the subframe.
23. The base station in accordance with claim 21 , wherein the condition is met when a particular state is indicated by an information element in at least one of a radio resource control (RRC) signaling and a physical layer (PRY) signaling.
24. The base station in accordance with claim 21 , wherein the condition is met when RI bits are not scheduled in the subframe.
25. The base station in accordance with claim 21 , wherein the condition is met when a channel quality information (CQI)/precoding matrix information (PMI) report is not scheduled in the subframe, and wherein the control region of the fifth symbol is allocated for PMI/CQI bits.
26. The base station in accordance with claim 25 , wherein the CQI/PMI report is an aperiodic CQI/PMI report.
27. The base station in accordance with claim 21 , wherein the condition is met when a single input multiple output physical uplink shared channel (SIMO PUSCH) is scheduled to carry the HARQ-ACK information bits.
28. The base station in accordance with claim 21 , wherein the second vector sequence of HARQ-ACK bits is allocated to the control region of the fifth symbol in a reverse order as the RI bits are allocated starting from a first virtual subcarrier and moving downwards.
29. The base station in accordance with claim 21 , wherein the second vector sequence of HARQ-ACK bits is allocated to the control region of the fifth symbol in a same order as the RI bits are allocated starting from a last virtual subcarrier and moving upwards.
30. The base station in accordance with claim 21 , wherein the second vector sequence of HARQ-ACK bits is allocated to the control region of the fifth symbol in a same order as the RI bits are allocated following a largest-numbered RI symbol vector and moving upwards.
31. A method of operating a base station, the method comprising:
receiving uplink control infoimation (UCI) in a subframe comprising one or more resource blocks, each resource block comprising S single carrier frequency division multiplexing (SC-FDM) symbols, each of the S symbols comprising N virtual subcarriers, and each subcarrier of each symbol comprises a resource element;
receiving a first vector sequence of hybrid automatic-repeat-request acknowledgement (HARQ-ACK) bits in a control region of each of four symbols of a resource block, the control region allocated for HARQ-ACK bits; and
receiving a second vector sequence of HARQ-ACK bits in a control region of a fifth symbol of the resource block when a condition is met, wherein the control region of the fifth symbol can be allocated for rank information (RI) bits.
32. The method in accordance with claim 31 , wherein the condition is met when Q′ ACK is greater than 4R′ mux , where Q′ ACK =Q ACK /Q m ,
where Q ACK denotes a total number of coded HARQ-ACK information bits in both the first vector sequence and the second vector sequence, Q m denotes a number of bits per symbol, and where R′ mux =R mux /Q m ,
where R mux =(H″·Q m )/C mux , H″=H′+Q′ RI , Q′ RI =Q RI /Q m , and C mux =N symb PUSCH (the number of symbols in a physical uplink shared channel, and where Q RI denotes a total number of coded rank information (RI) bits in the subframe.
33. The method in accordance with claim 31 , wherein the condition is met when a particular state is indicated by an information element in at least one of a radio resource control (RRC) signaling and a physical layer (PHY) signaling.
34. The method in accordance with claim 31 , wherein the condition is met when RI bits are not scheduled in the subframe.
35. The method in accordance with claim 31 , wherein the condition is met when a channel quality information (CQI)/precoding matrix information (PMI) report is not scheduled in the subframe, and wherein the control region of the OFDM symbol is allocated for PMI/CQI bits.
36. The method in accordance with claim 35 , wherein the CQI/PMI report is an aperiodic CQI/PMI report.
37. The method in accordance with claim 31 , wherein the condition is met when a single input multiple output physical uplink shared channel (SIMO PUSCH) is scheduled to carry the HARQ-ACK information bits.
38. The method in accordance with claim 31 , wherein the second vector sequence of HARQ-ACK bits is allocated to the control region of the fifth symbol in a reverse order as the RI bits are allocated starting from a first virtual subcarrier and moving downwards.
39. The method in accordance with claim 31 , wherein the second vector sequence of HARQ-ACK bits is allocated to the control region of the fifth symbol in a same order as the RI bits are allocated starting from a last virtual subcarrier and moving upwards.
40. The method in accordance with claim 31 , wherein the second vector sequence of HARQ-ACK bits is allocated to the control region of the fifth symbol in a same order as the RI bits are allocated following a largest-numbered RI symbol vector and moving upwards.