Method for uplink collaborative SDMA user pairing in WIMAX

A method, system, and communication network for grouping a pair of independent information signals on the same time-frequency orthogonal frequency division multiplexing (OFDM) resources for uplink (UL) collaborative SDMA, in a wireless communication system. An uplink scheduling (ULS) utility employs...

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Bibliographic Details
Main Author Yu, Xiaoyong
Format Patent
LanguageEnglish
Published 24.08.2010
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Summary:A method, system, and communication network for grouping a pair of independent information signals on the same time-frequency orthogonal frequency division multiplexing (OFDM) resources for uplink (UL) collaborative SDMA, in a wireless communication system. An uplink scheduling (ULS) utility employs an estimated channel gain associated with the transmission path(s) of each user to create a pairing metric that effectively computes the correlation between each pair of independent information signals on a specific sub-carrier frequency channel. Pairs of information signals are considered as possible groupings when the values of the corresponding pairing metrics are less than a threshold maximum value. An optimal selection of final pairings is based on the relative values of the pairing metric(s) and other priority conditions which may include quality of service requirements. The ULS utility enables the UL scheduler to pair information signals with a clear spatial distinction and minimal correlation.