Methods and apparatus for reporting and/or using control information
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
H04W-024/10
H04W-072/04
출원번호
US-0813096
(2015-07-29)
등록번호
US-10159006
(2018-12-18)
발명자
/ 주소
Das, Arnab
Anigstein, Pablo
Srinivasan, Murari
Li, Junyi
출원인 / 주소
QUALCOMM Incorporated
대리인 / 주소
Patterson & Sheridan, L.L.P
인용정보
피인용 횟수 :
0인용 특허 :
209
초록▼
A wireless communications system supports wireless connections between base station sector attachment points and wireless terminals. Individual wireless connections correspond to one of a downlink-macrodiversity mode of operation and a downlink non-macrodiversity mode of operation. A wireless termin
A wireless communications system supports wireless connections between base station sector attachment points and wireless terminals. Individual wireless connections correspond to one of a downlink-macrodiversity mode of operation and a downlink non-macrodiversity mode of operation. A wireless terminal has, for each of its current connections, a base station assigned dedicated control channel for communicating uplink control information reports. The uplink control information reports include downlink signal-to-noise ratio reports based on measured received pilot channel signals. If a connection corresponds to a macrodiversity mode of operation, a reporting format for the SNR report is used which reports (i) an SNR value and (ii) an indication as to whether or not the connection is considered a preferred connection by the wireless terminal. If a connection corresponds to a non-macrodiversity mode of operation, a reporting format for the SNR report is used which reports an SNR value.
대표청구항▼
1. A method of operating a base station in a communications system including a wireless terminal that communicates control information reports, the method comprising: receiving a first report of a particular type according to a first reporting format from said wireless terminal operating in a first
1. A method of operating a base station in a communications system including a wireless terminal that communicates control information reports, the method comprising: receiving a first report of a particular type according to a first reporting format from said wireless terminal operating in a first mode of operation, said first reporting format communicating a signal-to-noise-ratio value without a preferred link indicator; andreceiving a second report of the same particular type according to a second reporting format from said wireless terminal operating in a second mode of operation, said second reporting format being different from said first reporting format, said second reporting format communicating both a signal-to-noise ratio value and a preferred link indicator value,wherein said first reporting format and said second reporting format each encode information into the same number of information bits. 2. The method of claim 1, wherein said first and second reports of the particular type include an absolute signal-to-noise ratio report. 3. The method of claim 2, wherein reports of the particular type are received in an uplink dedicated control channel segment, said uplink dedicated control channel segment being dedicated exclusively for said wireless terminal to use on a contention free basis for transmitting uplink control information. 4. The method of claim 3, wherein said uplink dedicated control channel segment is an orthogonal frequency division multiplexing (OFDM) segment. 5. The method of claim 1, wherein said first mode of operation is a wireless terminal non-macrodiversity mode of operation and wherein said second mode of operation is a wireless terminal macrodiversity mode of operation. 6. The method of claim 5, wherein in the macrodiversity mode of operation a set of data intended for communication to the wireless terminal, is available to at least two different link layer controllers, which can be used in communicating the data over different wireless connections to the wireless terminal. 7. The method of claim 6, wherein at least one of the two different link layer controllers is in said base station. 8. The method of claim 5, wherein in the macrodiversity mode of operation the wireless terminal has simultaneous connections to two different base station attachment points, at least one of said two different attachment points corresponding to said base station, the two different base station attachment points being different from each other in at least one of: base station, base station sector or tone block. 9. The method of claim 1, further comprising: simultaneously receiving multiple reports of the particular type, each of said multiple reports corresponding to a different wireless terminal. 10. The method of claim 9, wherein some of the simultaneously received reports are in accordance with the first reporting format and at least one of said simultaneously received reports is in accordance with the second reporting format. 11. The method of claim 10, further comprising: storing state information indicating whether individual wireless terminals from which reports of the particular type may be received are operating in a macrodiversity mode of operation or a non-macrodiversity mode of operation. 12. The method of claim 1, wherein the highest SNR value that can be conveyed by the first reporting format is higher than the highest SNR value that can be reported by the second reporting format. 13. A base station in a communications system including a wireless terminal that communicates control information reports, the base station comprising: a receiver module for receiving reports from the wireless terminal;a first recovery module for recovering, from the received reports, a first report of a particular type according to a first reporting format, the first report received from the wireless terminal operating in a first mode of operation, the first reporting format communicating a signal to noise ratio value without a preferred link indicator; anda second recovery module for recovering, from the received reports, a second report of the same particular type according to a second reporting format, the second report received from the wireless terminal operating in a second mode of operation, the second reporting format communicating a signal to noise ratio value and a preferred link indicator value,wherein said first reporting format and said second reporting format each encode information into the same number of information bits. 14. The base station of claim 13, wherein said first and second reports of the particular type include an absolute signal-to-noise ratio report. 15. The base station of claim 14, wherein reports of the particular type is received in an uplink dedicated control channel segment, said uplink dedicated control channel segment being dedicated exclusively for the wireless terminal to use on a contention free basis for transmitting uplink control information. 16. The base station of claim 15, wherein said uplink dedicated control channel segment is an orthogonal frequency division multiplexing (OFDM) segment. 17. The base station of claim 13, wherein said first mode of operation is a non-macrodiversity mode of operation and wherein said second mode of operation is a wireless terminal macrodiversity mode of operation. 18. The base station of claim 17, further comprising: a memory including stored state information indicating whether individual wireless terminals from which reports of the particular type may be received are operating in a macrodiversity mode of operation or a non-macrodiversity mode of operation. 19. A base station in a communications system including a wireless terminal that communicates control information reports, the base station comprising: means for receiving reports from the wireless terminal;means for recovering, from the received reports, a first report of a particular type according to a first reporting format, the first report received from the wireless terminal operating in a first mode of operation, the first reporting format communicating a signal to noise ratio value without a preferred link indicator; andmeans for recovering, from the received reports, a second report of the same particular type according to a second reporting format, the second report received from the wireless terminal operating in a second mode of operation, the second reporting format communicating a signal to noise ratio value and a preferred link indicator value,wherein said first reporting format and said second reporting format each encode information into the same number of information bits. 20. The base station of claim 19, wherein said first and second reports of the particular type include an absolute signal-to-noise ratio report. 21. The base station of claim 20, wherein reports of the particular type are received in an uplink dedicated control channel segment, said uplink dedicated control channel segment being dedicated exclusively for a wireless terminal to use on a contention free basis for transmitting uplink control information. 22. The base station of claim 21, wherein said uplink dedicated control channel segment is an orthogonal frequency division multiplexing (OFDM) segment. 23. The base station of claim 19, wherein said first mode of operation is a non-macrodiversity mode of operation and wherein said second mode of operation is a wireless terminal macrodiversity mode of operation. 24. The base station of claim 19, further comprising: memory means for storing state information indicating whether individual wireless terminals from which reports of the particular type are received are operating in a macrodiversity mode of operation or a non-macrodiversity mode of operation. 25. A non-transitory computer readable medium embodying machine executable instructions for controlling a base station to implement a method comprising: receiving a first report of a particular type according to a first reporting format from a wireless terminal operating in a first mode of operation, said first reporting format communicating a signal-to-noise-ratio value without a preferred link indicator; andreceiving a second report of the same particular type according to a second reporting format from said wireless terminal operating in a second mode of operation, said second reporting format being different from said first reporting format, said second reporting format communicating both a signal-to-noise ratio value and a preferred link indicator value,wherein said first reporting format and said second reporting format each encode information into the same number of information bits. 26. The non-transitory computer readable medium of claim 25, wherein said first and second reports of the particular type include an absolute signal-to-noise ratio report. 27. The non-transitory computer readable medium of claim 26, wherein reports of the particular type are received in an uplink dedicated control channel segment, said uplink dedicated control channel segment being dedicated exclusively for said wireless terminal to use on a contention free basis for transmitting uplink control information. 28. The non-transitory computer readable medium of claim 27, wherein said uplink dedicated control channel segment is an orthogonal frequency division multiplexing (OFDM) segment. 29. The non-transitory computer readable medium of claim 25, wherein said first mode of operation is a wireless terminal non-macrodiversity mode of operation and wherein said second mode of operation is a wireless terminal macrodiversity mode of operation. 30. The non-transitory computer readable medium of claim 29, wherein in the macrodiversity mode of operation a set of data intended for communication to the wireless terminal, is available to at least two different link layer controllers, which can be used in communicating the data over different wireless connections to the wireless terminal. 31. The non-transitory computer readable medium of claim 30, wherein at least one of the two different link layer controllers is in said base station. 32. The non-transitory computer readable medium of claim 29, wherein in the macrodiversity mode of operation the wireless terminal has simultaneous connections to two different base station attachment points, at least one of said two different attachment points corresponding to said base station, the two different base station attachment points being different from each other in at least one of: base station, base station sector or tone block. 33. The non-transitory computer readable medium of claim 25, further comprising machine executable instructions for: simultaneously receiving multiple reports of the particular type, each of said multiple reports corresponding to a different wireless terminal. 34. The non-transitory computer readable medium of claim 33, wherein some of the simultaneously received reports are in accordance with the first report format and at least one of said simultaneously received reports is in accordance with the second report format. 35. The non-transitory computer readable medium of claim 34, further comprising machine executable instructions for: storing state information indicating whether individual wireless terminals from which reports of the particular type are received are operating in a macrodiversity mode of operation or a non-macrodiversity mode of operation. 36. The non-transitory computer readable medium of claim 25, wherein the highest SNR value that can be conveyed by the first reporting format is higher than the highest SNR value that can be reported by the second reporting format. 37. An apparatus operable in a communications system including a wireless terminal that communicates control information reports, the apparatus comprising: a processor configured to: receive a first report of a particular type according to a first reporting format from said wireless terminal operating in a first mode of operation, said first reporting format communicating a signal-to-noise-ratio value without a preferred link indicator; andreceive a second report of the same particular type according to a second reporting format from said wireless terminal operating in a second mode of operation, said second reporting format being different from said first reporting format, said second reporting format communicating both a signal-to-noise ratio value and a preferred link indicator value,wherein said first reporting format and said second reporting format each encode information into the same number of information bits. 38. The apparatus of claim 37, wherein said first and second reports of the particular type include an absolute signal-to-noise ratio report. 39. The apparatus of claim 38, wherein the processor is configured to: receive at least one of the first or second reports of the particular type from an uplink dedicated control channel segment, said uplink dedicated control channel segment being dedicated exclusively for said wireless terminal to use on a contention free basis for transmitting uplink control information.
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