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| 국가/구분 | United States(US) Patent 등록 |
|---|---|
| 국제특허분류(IPC7판) |
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| 출원번호 | US-0837337 (2001-04-17) |
| 발명자 / 주소 |
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| 출원인 / 주소 |
|
| 대리인 / 주소 |
|
| 인용정보 | 피인용 횟수 : 209 인용 특허 : 51 |
A method and apparatus for subcarrier selection for systems is described. In one embodiment, a method for subcarrier selection for a system employing orthogonal frequency division multiple access (OFDMA) comprises partitioning subcarriers into groups of at least one cluster of subcarriers, receiving
A method and apparatus for subcarrier selection for systems is described. In one embodiment, a method for subcarrier selection for a system employing orthogonal frequency division multiple access (OFDMA) comprises partitioning subcarriers into groups of at least one cluster of subcarriers, receiving an indication of a selection by the subscriber of one or more groups in the groups, and allocating at least one cluster in the one or more groups of clusters selected by the subcarrier for use in communication with the subscriber.
1. A method for subcarrier selection for a system employing orthogonal frequency division multiple access (OFDMA) comprising:partitioning subcarriers into a plurality of groups of at least one cluster of subcarriers; and receiving an indication of a selection by a subscriber of one or more groups in
1. A method for subcarrier selection for a system employing orthogonal frequency division multiple access (OFDMA) comprising:partitioning subcarriers into a plurality of groups of at least one cluster of subcarriers; and receiving an indication of a selection by a subscriber of one or more groups in the plurality of groups; allocating at least one cluster in the one or more groups of clusters selected by the subscriber for use in communication with the subscriber, including selecting the at least one cluster based on a group priority in which the subscriber has a higher priority for use of the group of cluster containing the at least one cluster than at least one other subscriber. 2. The method defined in claim 1 further comprising the subscriber sending the indication to a base station.3. The method defined in claim 1 further comprising sending an indication of the group of clusters selected by the base station for use by the subscriber.4. The method defined in claim 1 wherein clusters in each of the plurality of groups of clusters are spaced apart over bandwidth allocatable by the base station.5. The method defined in claim 1 wherein clusters in each of the plurality of groups are spaced apart farther than coherent bandwidth of each channel between the bas station and the subscriber.6. The method defined in claim 1 wherein the one or more groups is only a subset of all of the groups of clusters allocatable by a base station.7. The method defined in claim 1 further comprising:sending pilot signal to the subscriber. 8. The method defined in claim 7 wherein the pilot signal indicates availability of each cluster.9. The method defined in claim 1 further comprising receiving feedback information on the one or more groups of clusters of subcarriers from the subscriber, and wherein the feedback information comprises SINR information for at least one cluster in each of the one or more groups.10. The method defined in claim 9 wherein the subscriber has a fixed association with the at least one group of clusters, such that group identifier information to identify groups associated with the SINR information is not necessary.11. The method defined in claim 1 further comprising receiving feedback information on the one or more groups of clusters of subcarriers from the subscriber, and wherein the feedback information is ordered based on SINR values of clusters in the one or more groups.12. The method defined in claim 1 further comprising receiving feedback information on the one or more groups of clusters of subcarriers from the subscriber, and wherein the feedback information comprises a group identifier and SINR value of each cluster within each group.13. The method defined in claim 12 wherein the group identifier comprises a group index.14. The method defined in claim 12 wherein the feedback information is formatted with, for each of the one or more groups, a group identifier followed by the SINR values of clusters in said each of the one or more groups.15. The method defined in claim 1 further comprising receiving feedback information on the one or more groups of clusters of subcarriers from the subscriber, and herein the feedback information is protected using error correcting codes.16. The method defined in claim 1 further comprising receiving feedback information on the one or more groups of clusters of subcarriers from the subscriber, and wherein the feedback information is compressed using source coding techniques and encoded with error correcting codes.17. The method defined in claim 1 further comprising receiving feedback information on the one or more groups of clusters of subcarriers from the subscriber, and herein the feedback information comprises a list of candidate cluster groups desired for use by the subscriber and their associated signal plus interference to noise ratio (SINR), the candidate clusters desired for use being a set of all possible clusters with SINRs relatively higher than other clusters in the set of all possible clusters.18. The method defined in claim 17 wherein the list of candidate cluster groups is ordered based on SINR values of clusters in the list.19. The method defined in claim 17 wherein the list of candidate cluster groups is ordered based on an SINR associated with each cluster in the group of cluster and availability of cluster groups in the list.20. The method defined in claim 17 wherein the feedback information includes a cluster group identifier followed by an SINR value for each cluster in the candidate cluster group.21. The method defined in claim 20 wherein the group identifier comprises a group index.22. The method defined in claim 1 further comprising receiving feedback information on the one or more groups of clusters of subcarriers from the subscriber, and wherein the subscriber is associated with at least one group of clusters and, further wherein the feedback information includes an SINR value associated with each group of clusters without explicitly specifying an index to the group of clusters.23. The method defined in claim 1 further comprising receiving addition feedback information on the one or more groups of clusters; and allocating additional clusters to the subscriber.24. A method for subcarrier selection for a system employing orthogonal frequency division multiple access (OFDMA) comprising:partitioning subcarriers into a plurality of groups of at least one cluster of subcarriers; and receiving an indication of a selection by a subscriber of one or more groups in the plurality of groups; receiving feedback information on the one or more groups of clusters of subcarriers from the subscriber, and wherein the feedback information comprises a group identifier and SINR value of each cluster within each group; and allocating at least one cluster in the one or more groups of clusters selected by the subscriber for use in communication with the subscriber. 25. The method defined in claim 24 wherein the group identifier comprises a group index.26. The method defined in claim 24 wherein the feedback information is formatted with, for each of the one or more groups, a group identifier followed by the SINR values of clusters in said each of the one or more groups.27. The method defined in claim 24 further comprising the subscriber sending the indication to a base station.28. The method defined in claim 24 further comprising sending an indication of the group of clusters selected by the base station for use by the subscriber.29. The method defined in claim 24 wherein clusters in each of the plurality of groups of clusters are spaced apart over bandwidth allocatable by the base station.30. The method defined in claim 24 wherein clusters in each of the plurality of groups are spaced apart farther than coherent bandwidth of each channel between the base station and the subscriber.31. The method defined in claim 24 further comprising selecting the at least one cluster based on a group priority in which the subscriber has a higher priority for use of the group of clusters containing the at least one cluster than at least one other subscriber.32. The method defined in claim 24 wherein the one or more groups is only a subset of all of the groups of clusters allocatable by a base station.33. The method defined in claim 24 further comprising:sending a pilot signal to the subscriber. 34. The method defined in claim 33 wherein the pilot signal indicates availability of each cluster.35. The method defined in claim 24 further comprising receiving feedback information on the one or more groups of clusters of subcarriers from the subscriber, and wherein the feedback information comprises SINR information for at least one cluster in each of the one or more groups.36. The method defined in claim 35 wherein the subscriber has a fixed association with the at least one group of clusters, such that group identifier information to identify groups associated with the SINR information is not necessary.37. The method defined in claim 24 further comprising receiving feedback information on the one or more groups of clusters of subcarriers from the subscriber, and wherein the feedback information is ordered based on SINR values of clusters in the one or more groups.38. The method defined in claim 24 further comprising receiving feedback information on the one or more groups of clusters of subcarriers from the subscriber, and wherein the feedback information is protected using error correcting codes.39. The method defined in claim 24 further comprising receiving feedback information on the one or more groups of clusters of subcarriers from the subscriber, and wherein the feedback information is compressed using source coding techniques and encoded with error correcting codes.40. The method defined in claim 24 further comprising receiving feedback information on the one or more groups of clusters of subcarriers from the subscriber, and wherein the feedback information comprises a list of candidate cluster groups desired for use by the subscriber and their associated signal plus interference to noise ratio (SINR), the candidate clusters desired for use being a set of all possible clusters with SINRs relatively higher than other clusters in the set of all possible clusters.41. The method defined in claim 40 wherein the list of candidate cluster groups is ordered based on SINR values of clusters in the list.42. The method defined in claim 40 wherein the list of candidate cluster groups is ordered based on an SINR associated with each cluster in the group of cluster and availability of cluster groups in the list.43. The method defined in claim 40 wherein the feedback information includes a cluster group identifier followed by an SINR value for each cluster in the candidate cluster group.44. The method defined in claim 43 wherein the group identifier comprises a group index.45. The method defined in claim 24 further comprising receiving feedback information on the one or more groups of clusters of subcarriers from the subscriber, and wherein the subscriber is associated with at least one group of clusters and, further wherein the feedback information includes an SINR value associated with each group of clusters without explicitly specifying an index to the group of clusters.46. The method defined in claim 24 further comprising:receiving additional feedback information on the one or more groups of clusters; and allocating additional clusters to the subscriber. 47. A method for subcarrier selection for a system employing orthogonal frequency division multiple access (OFDMA) comprising:partitioning subcarriers into a plurality of groups of at least one cluster of subcarriers; and receiving an indication of a selection by a subscriber of one or more groups in the plurality of groups; receiving feedback information on the one or more groups of clusters of subcarriers from the subscriber, and wherein the feedback information is compressed using source coding techniques and encoded with error correcting codes; and allocating at least one cluster in the one or more groups of clusters selected by the subscriber for use in communication with the subscriber. 48. The method defined in claim 47 further comprising the subscriber sending the indication to a base station.49. The method defined in claim 47 further comprising sending an indication of the group of clusters selected by the base station for use by the subscriber.50. The method defined in claim 47 wherein clusters in each of the plurality of groups of clusters are spaced apart over bandwidth allocatable by the base station.51. The method defined in claim 47 wherein clusters in each of the plurality of groups are spaced apart farther than coherent bandwidth of each channel between the base station and the subscriber.52. The method defined in claim 47 further comprising selecting the at least one cluster based on a group priority in which the subscriber has a higher priority for use of the group of clusters containing the at least one cluster than at least one other subscriber.53. The method defined in claim 47 wherein the one or more groups is only a subset of all of the groups of clusters allocatable by a base station.54. The method defined in claim 47 further comprising:sending a pilot signal to the subscriber. 55. The method defined in claim 54 wherein the pilot signal indicates availability of each cluster.56. The method defined in claim 47 wherein the feedback information comprises SINR information for at least one cluster in each of the one or more groups.57. The method defined in claim 56 wherein the subscriber has a fixed association with the at least one group of clusters, such that group identifier information to identify groups associated with the SINR information is not necessary.58. The method defined in claim 47 wherein the feedback information is ordered based on SINR values of clusters in the one or more groups.59. The method defined in claim 47 wherein the feedback information comprises a group identifier and SINR value of each cluster within each group.60. The method defined in claim 59 wherein the group identifier comprises a group index.61. The method defined in claim 59 wherein the feedback information is formatted with, for each of the one or more groups, a group identifier followed by the SINR values of clusters in said each of the one or more groups.62. The method defined in claim 47 wherein the feedback information is protected using error correcting codes.63. The method defined in claim 47 wherein the feedback information comprises a list of candidate cluster groups desired for use by the subscriber and their associated signal plus interference to noise ratio (SINR), the candidate clusters desired for use being a set of all possible clusters with SINRs relatively higher than other clusters in the set of all possible clusters codes.64. The method defined in claim 63 wherein the list of candidate cluster groups is ordered based on SINR values of clusters in the list.65. The method defined in claim 63 wherein the list of candidate cluster groups is ordered based on an SINR associated with each cluster in the group of cluster and availability of cluster groups in the list.66. The method defined in claim 63 wherein the feedback information includes a cluster group identifier followed by an SINR value for each cluster in the candidate cluster group.67. The method defined in claim 66 wherein the group identifier comprises a group index.68. The method defined in claim 47 wherein the subscriber is associated with at least one group of clusters and, further wherein the feedback information includes an SINR value associated with each group of clusters without explicitly specifying an index to the group of clusters.69. The method defined in claim 47 further comprisingreceiving additional feedback information on the one or more groups of clusters; and allocating additional clusters to the subscriber. 70. A method for subcarrier selection for a system employing orthogonal frequency division multiple access (OFDMA) comprising:partitioning subcarriers into a plurality of groups of at least one cluster of subcarriers; and receiving an indication of a selection by a subscriber of one or more groups in the plurality of groups; receiving feedback information on the one or more groups of clusters of subcarriers from the subscriber, and wherein the feedback information comprises a list of candidate cluster groups desired for use by the subscriber and their associated signal plus interference to noise ratio (SINR), the candidate clusters desired for use being a set of all possible clusters with SINRs relatively higher than other clusters in the set of all possible clusters; and allocating at least one cluster in the one or more groups of clusters selected by the subscriber for use in communication with the subscriber. 71. The method defined in claim 70 wherein the list of candidate cluster groups is ordered based on SINR values of clusters in the list.72. The method defined in claim 70 wherein the list of candidate cluster groups is ordered based on an SINR associated with each cluster in the group of clusters and availability of cluster groups in the list.73. The method defined in claim 70 wherein the feedback information includes a cluster group identifier followed by an SINR value for each cluster in the candidate cluster group.74. The method defined in claim 73 wherein the group identifier comprises a group index.75. The method defined in claim 70 further comprising the subscriber sending the indication to a base station.76. The method defined in claim 70 further comprising sending an indication of the group of clusters selected by the base station for use by the subscriber.77. The method defined in claim 70 wherein clusters in each of the plurality groups of clusters are spaced apart over bandwidth allocatable by the base station.78. The method defined in claim 70 wherein clusters in each of the plurality of groups are spaced apart farther than coherent bandwidth of each channel between the base station and the subscriber.79. The method defined in claim 70 further comprising selecting the at least one cluster based on a group priority in which the subscriber has a higher priority for use of the group of clusters containing the at least one cluster than at least one other subscriber.80. The method defined in claim 70 wherein the one or more groups is only a subset of all of the groups of clusters allocatable by a base station.81. The method defined in claim 70 further comprising:sending pilot signal to the subscriber. 82. The method defined in claim 81 wherein the pilot signal indicates availability of each cluster.83. The method defined in claim 70 wherein the subscriber has a fixed association with the at least one group of clusters, such that group identifier information to identify groups associated with the SINR information is not necessary.84. The method defined in claim 70 wherein the feedback information is ordered based on SINR values of clusters in the one or more groups.85. The method defined in claim 70 wherein the feedback information comprises a group identifier and SINR value of each cluster within each group.86. The method defined in claim 85 wherein the group identifier comprises a group index.87. The method defined in claim 85 wherein the feedback information is formatted with, for each of the one or more groups, a group identifier followed by the SINR values of clusters in said each of the one or more groups.88. The method defined in claim 70 wherein the feedback information is protected using error correcting codes.89. The method defined in claim 70 wherein the feedback information is compressed using source coding techniques and encoded with error correcting codes.90. The method defined in claim 70 wherein the subscriber is associated with at least one group of clusters and, further wherein the feedback information includes an SINR value associated with each group of clusters without explicitly specifying an index to the group of clusters.91. The method defined in claim 70 further comprising:receiving additional feedback information on the one or more groups of clusters; and allocating additional clusters to the subscriber. 92. A method for subcarrier selection for a system employing orthogonal frequency division multiple access (OFDMA) comprising:partitioning subcarriers into a plurality of groups of at least one cluster of subcarriers; and receiving an indication of a selection by a subscriber of one or more groups in the plurality of groups; allocating at least one cluster in the one or more groups of clusters selected by the subscriber for use in communication with the subscriber; receiving additional feedback information on the one or more groups of clusters; and allocating additional clusters to the subscriber. 93. The method defined in claim 92 further comprising the subscriber sending the indication to a base station.94. The method defined in claim 92 further comprising sending an indication of the group of clusters selected by the base station for use by the subscriber.95. The method defined in claim 92 wherein clusters in each of the plurality of groups of clusters are spaced apart over bandwidth allocatable by the base station.96. The method defined in claim 92 wherein clusters in each of the plurality of groups are spaced apart farther than coherent bandwidth of each channel between the bas station and the subscriber.97. The method defined in claim 92 further comprising selecting the at least one cluster based on a group priority in which the subscriber has a higher priority for use of the group of clusters containing the at least one cluster than at least one other subscriber.98. The method defined in claim 92 wherein the one or more groups is only a subset of all of the groups of clusters allocatable by a base station.99. The method defined in claim 92 further comprising:sending pilot signal to the subscriber. 100. The method defined in claim 99 wherein the pilot signal indicates availability of each cluster.101. The method defined in claim 92 further comprising receiving feedback information on the one or more groups of clusters of subcarriers from the subscriber, and wherein the feedback information comprises SINR information for at least one cluster in each of the one or more groups.102. The method defined in claim 101 wherein the subscriber has a fixed association with the at least one group of clusters, such that group identifier information to identify groups associated with the SINR information is not necessary.103. The method defined in claim 92 further comprising receiving feedback information on the one or more groups of clusters of subcarriers from the subscriber, and wherein the feedback information is ordered based on SINR values of clusters in the one or more groups.104. The method defined in claim 92 further comprising receiving feedback information on the one or more groups of clusters of subcarriers from the subscriber, and wherein the feedback information comprises a group identifier and SINR value of each cluster within each group.105. The method defined in claim 104 wherein the group identifier comprises a group index.106. The method defined in claim 104 wherein the feedback information is formatted with, for each of the one or more groups, a group identifier followed by the SINR values of clusters in said each of the one or more groups.107. The method defined in claim 92 further comprising receiving feedback information on the one or more groups of clusters of subcarriers from the subscriber, and wherein the feedback information is protected using error correcting codes.108. The method defined in claim 92 further comprising receiving feedback information on the one or more groups of clusters of subcarriers from the subscriber, and wherein the feedback information is compressed using source coding techniques and encoded with error correcting codes.109. The method defined in claim 92 further comprising receiving feedback information on the one or more groups of clusters of subcarriers from the subscriber, and wherein the feedback information comprises a list of candidate cluster groups desired for use by the subscriber and their associated signal plus interference to noise ratio (SINR), the candidate clusters desired for use being a set of all possible clusters with SINRs relatively higher than other clusters in the set of all possible clusters.110. The method defined in claim 109 wherein the list of candidate cluster groups is ordered based on SINR values of clusters in the list.111. The method defined in claim 109 wherein the list of candidate cluster groups is ordered based on an SINR associated with each cluster in the group of cluster and availability of cluster groups in the list.112. The method defined in claim 109 wherein the feedback information includes a cluster group identifier followed by an SINR value for each cluster in the candidate cluster group.113. The method defined in claim 112 wherein the group identifier comprises a group index.114. The method defined in claim 92 further comprising receiving feedback information on the one or more groups of clusters of subcarriers from the subscriber, and wherein the subscriber is associated with at least one group of clusters and, further wherein he feedback information includes an SINR value associated with each group of clusters without explicitly specifying an index to the group of clusters.115. An apparatus comprising:a cluster location controller to receive an indication of a selection by a subscriber of one or more groups a plurality of groups of at least one cluster of subcarriers and to allocate at least one cluster in the one or more groups of clusters selected by the subscriber for use in communication with the subscriber by selecting the at least one cluster based on a group priority in which the subscriber has a higher priority for use of the group of clusters containing the at least one cluster than at least one other subscriber; and an orthogonal frequency division multiplexing (OFDM) transceiver coupled to the cluster allocation controller to send a notification to the subscriber indicating the at least one cluster in the one or more groups of clusters to be used by the subscriber. 116. An apparatus comprising:a cluster allocation controller to receive an indication of a selection by a subscriber of one or more groups in a plurality of groups of at least one cluster of subcarriers and feedback information on the one or more groups of clusters of subcarriers from the subscriber, and wherein the feedback information comprises a group identifier and SINR value of each cluster within each group, and to allocate at least one cluster in the one or more groups of clusters selected by the subscriber for use in communication with the subscriber; and an orthogonal frequency division multiplexing (OFDM) transceiver coupled to the cluster allocation controller to send a notification to the subscriber indicating the at least one cluster in the on or more groups of clusters to be used by the subscriber. 117. An apparatus comprising:a cluster allocation controller to receive an indication of a selection by a subscriber of one or more groups in a plurality of groups of at least one cluster of subcarriers and feedback information on the one or more groups of clusters of subcarriers from the subscriber, and wherein the feedback information is compressed using source coding techniques and encoded with error correcting codes, and to allocate at least one cluster in the one or more groups of clusters selected by the subscriber for use in communication with the subscriber; and an orthogonal frequency division multiplexing (OFDM) transceiver coupled to the cluster allocation controller to send a notification to the subscriber indicating the at least one cluster in the one or more groups of clusters to be used by the subscriber. 118. An apparatus comprising:a cluster location controller to receive an indication of a selection by a subscriber of one or more groups in a plurality of groups of at least one cluster of subcarriers and feedback information on the one or more groups of clusters of subcarriers from the subscriber, and wherein the feedback information comprises a list of candidate cluster groups desired for use by the subscriber and their associated signal plus interference to noise ratio (SINR), the candidate clusters desired for use being a set of all possible clusters with SINRs relatively higher than other clusters in the set of all possible dust, and to allocate at least one cluster in the one or more groups of clusters selected by the subscriber for use in communication with the subscriber; and an orthogonal frequency division multiplexing (OFDM) transceiver coupled to the cluster allocation controller to send a notification to the subscriber indicating the at least one cluster in the on or more groups of clusters to be used by the subscriber. 119. An apparatus comprising:a cluster allocation controller to receive an indication of a selection by a subscriber of one or more groups in a plurality of groups of at least one cluster of subcarriers, and to allocate at least one cluster in the one or more groups of clusters selected by the subscriber for use in communication with the subscriber; and an orthogonal frequency division multiplexing (OFDM) transceiver coupled to the cluster allocation controller to send a notification to the subscriber indicating the at least one cluster in the one or more groups of clusters to be used by the subscriber, wherein the cluster allocation controller is operable to receive additional feedback information on the one or more groups of clusters and allocate additional clusters to the subscriber.
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