Methods and apparatus for reporting and/or using control information
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
H04B-017/00
H04W-024/10
출원번호
US-0487051
(2006-07-14)
등록번호
US-9125092
(2015-09-01)
발명자
/ 주소
Das, Arnab
Anigstein, Pablo
Srinivasan, Murari
Li, Junyi
출원인 / 주소
QUALCOMM Incorporated
대리인 / 주소
Patel, Ashish L.
인용정보
피인용 횟수 :
4인용 특허 :
176
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 wireless terminal to communicate control information reports, the method comprising: operating the wireless terminal in a first mode of operation in which the wireless terminal communicates a first type of report using a first reporting format, reports generated in accorda
1. A method of operating a wireless terminal to communicate control information reports, the method comprising: operating the wireless terminal in a first mode of operation in which the wireless terminal communicates a first type of report using a first reporting format, reports generated in accordance with said first reporting format communicating a signal-to-noise-ratio value; andoperating the wireless terminal in a second mode of operation in which the wireless terminal communicates the first type of report using a second reporting format, said second reporting format being different than said first reporting format, reports generated in accordance with said second reporting format communicating both a signal-to-noise ratio value and a preferred link indicator value. 2. The method of claim 1, wherein said first type of report is an absolute signal-to-noise ratio report. 3. The method of claim 2, wherein the first type of report is communicated using 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. 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 non-macrodiversity mode of operation and wherein said second mode of operation is a 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 the two different link layer controllers are in different base stations. 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, the two different base station attachment points being different from each other in at least one of: base station, base station sector, and tone block. 9. The method of claim 5, wherein said first reporting format and said second reporting format each encode information into the same number of information bits. 10. The method of claim 9, 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. 11. The method of claim 9, wherein the preferred link indicator indicates whether or not a connection over which said first type of report is being communicated corresponds to a wireless terminal preferred downlink connection. 12. The method of claim 11, wherein the lowest SNR value that can be communicated for a non-preferred connection is lower than the lowest SNR value that can be communicated for a wireless terminal preferred downlink connection. 13. The method of claim 11, wherein the highest SNR value that can be communicated for a preferred connection is higher than the highest SNR value that can be communicated for a wireless terminal non-preferred downlink connection. 14. The method of claim 5, wherein operating a wireless terminal in a first mode of operation includes: measuring received downlink pilot channel signals communicated over a first connection;determining a first SNR value corresponding to the first connection;generating a first report corresponding to the first connection including a quantized representation of the determined first SNR value; andtransmitting the first report over the first connection. 15. The method of claim 5, wherein operating a wireless terminal in a second mode of operation includes: measuring received downlink pilot signals communicated over a first connection;determining a first SNR value corresponding to the first connection;measuring received downlink pilot signals communicated over a second connection, said second connection being different from said first connection;determining a second SNR value corresponding to the second connection;selecting one of said first and second connections as a preferred connection;generating a first report corresponding to the first connection including a quantized representation of the determined first SNR value and a first report preferred connection indicator value;generating a second report corresponding to the second connection including a quantized representation of the determined second SNR value and a second report preferred connection indicator value, wherein the first and second report preferred connection indicator values are different;transmitting the first report over the first connection; andtransmitting the second report over the second connection. 16. The method of claim 15, wherein operating a wireless terminal in a second mode of operation further comprises: deciding to subsequently select a different one of said first and second connections as the preferred connection; andcommunicating the new preferred connection information. 17. The method of claim 16, wherein the wireless terminal is restricted from changing preferred connections until at least a predetermined fixed number of reports indicating the same preferred connection are transmitted. 18. The method of claim 16, further comprising: operating the wireless terminal to communicate DCCH reports using a full-tone DCCH format during a first time interval;operating the wireless terminal to communicate DCCH reports using a split-tone format during a second time interval, said second time interval being different than said first time interval, and wherein when using full-tone format said at least a fixed number of predetermined reports is a first value, and wherein when using split-tone format said at least a fixed number of predetermined reports is a second value, said second value being different than said first value. 19. The method of claim 18, wherein said first value is larger than said second value. 20. The method of claim 19, wherein said first value is 10 and said second value is 6. 21. A wireless terminal comprising: a mode control module for controlling the wireless terminal to operate in first and second modes of operation;a control report generation module responsive to the control module, for generating in the first mode of operation a first type of report using a first reporting format, said first reporting format communicating a signal-to-noise-ratio value, and for generating when in the second mode of operation a first type of report using a second reporting format, said second reporting format being different than said first reporting format, said second reporting format communicating both a signal-to-noise ratio value and a preferred link indicator value in a report; anda transmitter for transmitting generated first type reports. 22. The wireless terminal of claim 21, wherein said first type of report is an absolute signal-to-noise ratio report. 23. The wireless terminal of claim 22, wherein said transmitter uses an uplink dedicated control channel segment to transmit said first type of report, 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. 24. The wireless terminal of claim 23, wherein said transmitter is an orthogonal frequency division multiplexing (OFDM) transmitter and wherein said uplink dedicated control channel segment is an OFDM segment. 25. The wireless terminal of claim 21, wherein said first mode of operation is a non-macrodiversity mode of operation and wherein said second mode of operation is a macrodiversity mode of operation. 26. The wireless terminal of claim 25, wherein in the macrodiversity mode, a set of data intended for communications 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. 27. The wireless terminal of claim 26, wherein the two different link layer controllers are in different base stations. 28. The wireless terminal of claim 25, wherein in the macrodiversity mode of operation the wireless terminal has simultaneous connections to two different base station attachment points, the two different base station attachment points being different from each other in at least one of: base station, base station sector, and tone block. 29. The wireless terminal of claim 25, further comprising: an encoding module for encoding information into information bits, and wherein said first reporting format and said second reporting format each encode information into the same number of information bits. 30. The wireless terminal of claim 29, 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. 31. The wireless terminal of claim 29, wherein the preferred link indicator indicates whether or not a connection over which said first type of report is being communicated corresponds to a wireless terminal preferred downlink connection. 32. The wireless terminal of claim 31, wherein the lowest SNR value that can be communicated for a non-preferred connection is lower than the lowest SNR value that can be communicated for a wireless terminal preferred downlink connection. 33. The wireless terminal of claim 31, wherein the highest SNR value that can be communicated for a preferred connection is higher than the highest SNR value that can be communicated for a wireless terminal non-preferred downlink connection. 34. The wireless terminal of claim 25, further comprising: a receiver for receiving pilot channel signals corresponding to one or more connections;a pilot channel measurement module for measuring received downlink pilot channel signals corresponding to one or more connections;an SNR determination module for determining an SNR value on a per connection basis as a function of one or more received pilot channel signals; anda preferred connection selection module for selecting one of a plurality of ongoing connections as a preferred connection when in the macro-diversity mode of operation. 35. The wireless terminal of claim 34, wherein the wireless terminal is restricted from changing an indicated preferred connection selection until at least a predetermined fixed number of reports indicating the same preferred connection are transmitted. 36. The wireless terminal of claim 34, further comprising: a dedicated control channel mode control module for controlling the wireless terminal to communicate DCCH reports using a full-tone DCCH format during some time interval and for controlling the wireless terminal to communicate DCCH reports using a split-tone format during at least one other time interval, and wherein when using full-tone format said at least a fixed number of predetermined reports is a first value, and wherein when using split-tone format said at least a fixed number of predetermined reports is a second value, said second value being different than said first value. 37. The wireless terminal of claim 36, wherein said first value is larger than said second value. 38. The wireless terminal of claim 37, wherein said first value is 10 and said second value is 6. 39. A wireless terminal comprising: means for controlling the wireless terminal to operate in first and second modes of operation;means for generating control information reports in accordance with the controlled mode of operation, for generating when in the first mode of operation a first type of report using a first reporting format, said first reporting format communicating a signal-to-noise-ratio value, and for generating when in the second mode of operation a first type of report using a second reporting format, said second reporting format being different than said first reporting format, said second reporting format communicating both a signal-to-noise ratio value and a preferred link indicator value in a report; andmeans for transmitting generated first type reports. 40. The wireless terminal of claim 39, wherein said first type of report is an absolute signal-to-noise ratio report. 41. The wireless terminal of claim 40, wherein said transmitter uses an uplink dedicated control channel segment to transmit said first type of report, 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. 42. The wireless terminal of claim 41, wherein said transmitter is an orthogonal frequency division multiplexing (OFDM) transmitter and wherein said uplink dedicated control channel segment is an OFDM segment. 43. The wireless terminal of claim 39, wherein said first mode of operation is a non-macrodiversity mode of operation and wherein said second mode of operation is a macrodiversity mode of operation. 44. The wireless terminal of claim 43, 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. 45. The wireless terminal of claim 44, wherein the two different link layer controllers are in different base stations. 46. The wireless terminal of claim 43, wherein in the macrodiversity mode of operation the wireless terminal has simultaneous connections to two different base station attachment points, the two different base station attachment points being different from each other in at least one of: base station, base station sector, and tone block. 47. The wireless terminal of claim 43, further comprising: means for encoding control information for encoding information into information bits, and wherein said first reporting format and said second reporting format each encode information into the same number of information bits. 48. The wireless terminal of claim 47, 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. 49. The wireless terminal of claim 47, wherein the preferred link indicator indicates whether or not a connection over which said first type of report is being communicated corresponds to a wireless terminal preferred downlink connection. 50. The wireless terminal of claim 49, wherein the lowest SNR value that can be communicated for a non-preferred connection is lower than the lowest SNR value that can be communicated for a wireless terminal preferred downlink connection. 51. The wireless terminal of claim 49, wherein the highest SNR value that can be communicated for a preferred connection is higher than the highest SNR value that can be communicated for a wireless terminal non-preferred downlink connection. 52. The wireless terminal of claim 43, further comprising: means for receiving signals for receiving pilot channel signals corresponding to one or more connections;means for measuring received signals for measuring received downlink pilot channel signals corresponding to one or more connections;means for determining SNR for determining an SNR value on a per connection basis as a function of one or more received pilot channel signals; andmeans for selecting a preferred connection for selecting one of a plurality of ongoing connections as a preferred connection when in the macro-diversity mode of operation. 53. The wireless terminal of claim 52, wherein the wireless terminal is restricted from changing an indicated preferred connection selection until at least a predetermined fixed number of reports indicating the same preferred connection are transmitted. 54. The wireless terminal of claim 52, further comprising: means for controlling dedicated control channel modes for controlling the wireless terminal to communicate DCCH reports using a full-tone DCCH format during some time interval and for controlling the wireless terminal to communicate DCCH reports using a split-tone format during at least one other time interval, and wherein when using full-tone format said at least a fixed number of predetermined reports is a first value, and wherein when using split-tone format said at least a fixed number of predetermined reports is a second value, said second value being different than said first value. 55. The wireless terminal of claim 54, wherein said first value is larger than said second value. 56. The wireless terminal of claim 55, wherein said first value is 10 and said second value is 6. 57. A non-transitory computer readable medium including stored machine executable instructions for controlling a wireless terminal , the computer readable medium comprising: instructions for causing the wireless terminal to operate in a first mode of operation in which the wireless terminal communicates a first type of report using a first reporting format, reports generated in accordance with said first reporting format communicating a signal-to-noise-ratio value; andinstructions for causing the wireless terminal to operate in a second mode of operation in which the wireless terminal communicates the first type of report using a second reporting format, said second reporting format being different than said first reporting format, reports generated in accordance with said second reporting format communicating both a signal-to-noise ratio value and a preferred link indicator value. 58. The computer readable medium of claim 57, wherein said first type of report is an absolute signal-to-noise ratio report. 59. The computer readable medium of claim 58, wherein the first type of report is communicated using 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. 60. The computer readable medium of claim 59, wherein said uplink dedicated control channel segment is an orthogonal frequency division multiplexing (OFDM) segment. 61. The computer readable medium of claim 57, wherein said first mode of operation is a non-macrodiversity mode of operation and wherein said second mode of operation is a macrodiversity mode of operation. 62. The computer readable medium of claim 61, 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. 63. An apparatus operable in a communication system, the apparatus comprising: a processor configured to: operate the apparatus in a first mode of operation in which the apparatus communicates a first type of report using a first reporting format, reports generated in accordance with said first reporting format communicating a signal-to-noise-ratio value; andoperate the apparatus in a second mode of operation in which the apparatus communicates the first type of report using a second reporting format, said second reporting format being different than said first reporting format, reports generated in accordance with said second reporting format communicating both a signal-to-noise ratio value and a preferred link indicator value. 64. The apparatus of claim 63, wherein said first type of report is an absolute signal-to-noise ratio report. 65. The apparatus of claim 64, wherein the processor is configured to: communicate the first type of report using an uplink dedicated control channel segment, said uplink dedicated control channel segment being dedicated exclusively for the apparatus to use on a contention free basis for transmitting uplink control information.
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