发明授权
US08849353B2 Method of grouping users to reduce interference in MIMO-based wireless network
有权
分组用户的方法,以减少基于MIMO的无线网络中的干扰
- 专利标题: Method of grouping users to reduce interference in MIMO-based wireless network
- 专利标题(中): 分组用户的方法,以减少基于MIMO的无线网络中的干扰
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申请号: US11796328申请日: 2007-04-27
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公开(公告)号: US08849353B2公开(公告)日: 2014-09-30
- 发明人: Gerard J. Foschini , Taesang Yoo
- 申请人: Gerard J. Foschini , Taesang Yoo
- 申请人地址: FR Boulogne-Billancourt
- 专利权人: Alcatel Lucent
- 当前专利权人: Alcatel Lucent
- 当前专利权人地址: FR Boulogne-Billancourt
- 代理机构: McCormick, Paulding & Huber LLP
- 主分类号: H04M1/00
- IPC分类号: H04M1/00 ; H04B7/04
摘要:
In a system of MIMO communications in a wireless network, a number of wireless units are logically divided into a plurality of user groups, through operation of a semi-orthogonal user selection sub-system. For example, the user selection sub-system may implement a heuristic user selection algorithm based on near-orthogonality. Each user group is assigned a discrete transmission channel, which may be orthogonally defined in terms of frequency, time, or code. Data is transmitted over the channels (e.g., from network base stations) in a coherently coordinated manner, according to a zero-forcing beamforming operation. The system may be configured for operation in a time/frequency selective manner, e.g., over time/frequency selective fading channels. The wireless units may be allocated to the time/frequency slots based on prioritization of channel strength and considerations of fairness, in conjunction with the application of a semi-orthogonal user selection algorithm.