Inter-cell interference avoidance for downlink transmission
AssigneeSamsung Electronics Co., Ltd.
InventorsLingjia Liu, Jianzhong Zhang, Zhouyue Pi
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Abstract
A system and method for inter-cell interference avoidance. A base station is configured to perform interference avoidance. The base station receives feedback information from either a second base station or a subscriber station served by the second base station. The base station selects a codebook vectors or matrices for transmission to subscriber stations based, at least in part, on a portion of the feedback information. The base station is further configured to select which subscriber stations will participate in interference avoidance calculations.
Claims20
For use in a wireless communications network, a subscriber station capable of receiving precoding wireless communications, said subscriber station comprising:
- a plurality of receive antennas;
- and
- a processor configured to perform channel estimation, wherein the processor is configured to:
- identify a first signal from a serving base station and a second signal from an interfering base station,
- generate compressed feedback information, the compressed feedback information including a threshold information and codebook information for the interfering base station, and
- transmit the compressed feedback information, wherein the compressed feedback information is used by at least one of the serving base station and interfering base station to select a codebook information in order to avoid interference in communications between the serving base station and the subscriber station.
A wireless communications network comprising a plurality of base stations and a plurality of subscriber stations, at least one of the base stations capable of performing interference avoidance, the at least one base station comprising:
- a receiver configured to receive compressed feedback information from at least one subscriber station, the compressed feedback information comprising a threshold information and at least one of a recommended set of codebook information and a restricted set of codebook information;
- a controller configured to use the compressed feedback information to select a codebook vector information in order to avoid interference in communications between a serving base station and the subscriber station.
For use in a wireless communications network, a method of interference avoidance, the method comprising:
- transmitting compressed feedback information, the compressed feedback information comprising a threshold information and an interference avoidance message indicating at least one of a preferred set of codebook information and a restricted set of codebook information;
- wherein a codebook information is selected based at least in part on said compressed feedback information.
Dependencies are inferred from the claim text.