Method and system for switching antenna and channel assignments in broadband wireless networks

摘要

A method and apparatus for antenna switching, grouping, and channel assignments in wireless communication systems. The invention allows multiuser diversity to be exploited with simple antenna operations, therefore increasing the capacity and performance of wireless communications systems. Channel characteristics indicative of signal reception quality for downlink or bi-directional traffic for each channel/antenna resource combination are measured or estimated at a subscriber. Corresponding channel characteristic information is returned to the base station. Channel characteristics information may also be measured or estimated for uplink or bi-directional signals received at each of multiple receive antenna resources. The base station employs channel allocation logic to assign uplink, downlink and/or bi-directional channels for multiple subscribers based on channel characteristics measured and/or estimated for the uplink, downlink and/or bi-directional channels.

主权项

1. A method for wireless communication, said method comprising:
receiving, at a base station from a subscriber station, data corresponding to a measured one or more channel characteristics of a plurality of orthogonal frequency division multiple access (OFDMA) subcarriers hosted by a first antenna resource and a second antenna resource located at the base station, the measured one or more channel characteristics being indicative of reception quality for a corresponding OFDMA subcarrier of the plurality of OFDMA subcarriers, and the first antenna resource and the second antenna resource including a plurality of antennas; assigning one or more OFDMA subcarriers of the plurality of OFDMA subcarriers, said assigning being based at least on the measured one or more channel characteristics of the first antenna resource and the second antenna resource, and at least one OFDMA subcarrier of the plurality of OFDMA subcarriers of said assigning being different from the first antenna resource and the second antenna resource; sending, to the subscriber station, a notification of said assigning; receiving, periodically, from the subscriber station to the base station, updated data corresponding to periodically measured one or more channel characteristics; reassigning one or more reassigned OFDMA subcarriers of the plurality of OFDMA subcarriers, said reassigning being based at least on the updated data corresponding to the periodically measured one or more channel characteristics of the first antenna resource and the second antenna resource; and sending, from the base station to the subscriber station, a notification of said reassigning.