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Method and device for eliminating intercell interference in multi-cell MIMO (Multiple Input Multiple Output) wireless communication network

A wireless communication network and multi-cell technology, which is applied in the field of wireless communication networks processed by single base station and multi-antenna, can solve the problems of total system throughput loss, performance degradation of mobile terminals with spatial freedom, etc., and achieve the effect of reducing overhead

Active Publication Date: 2010-07-07
ALCATEL LUCENT SHANGHAI BELL CO LTD
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AI Technical Summary

Problems solved by technology

The reduction of the spatial degrees of freedom of the base station 11' for signal transmission will lead to poor performance of the mobile terminal 21'
In some cases, the throughput loss caused by the reduction of signal spatial degree will be greater than the throughput gain caused by the reduction of adjacent cell interference, so that the loss of total system throughput

Method used

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  • Method and device for eliminating intercell interference in multi-cell MIMO (Multiple Input Multiple Output) wireless communication network
  • Method and device for eliminating intercell interference in multi-cell MIMO (Multiple Input Multiple Output) wireless communication network
  • Method and device for eliminating intercell interference in multi-cell MIMO (Multiple Input Multiple Output) wireless communication network

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Embodiment Construction

[0037] For the sake of brevity in the following description, the following terms are defined here:

[0038] Base station working in interference cancellation mode: If a base station needs to provide services for mobile terminals belonging to it and also needs to eliminate interference to another mobile terminal belonging to adjacent cells, then the base station is said to be working in interference in erasure mode.

[0039] Mobile terminal working in interference cancellation mode: If a mobile terminal needs the base station of a neighboring cell to cancel interference to it, then the mobile terminal is said to be working in interference cancellation mode.

[0040] Serving base station: If a mobile terminal receives data from a base station, then the base station is called the serving base station of the mobile terminal.

[0041] Served mobile terminal: If a mobile terminal receives data from a base station, then the mobile terminal is called the served mobile terminal of the...

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Abstract

The invention provides a method and a device for eliminating intercell interference in a multi-cell MIMO wireless communication network. In the method, a mobile terminal selects data stream fluxion transmitted by a service base station according to a downlink physical channel transmission matrix, generates a filtration matrix based on the matrix and the fluxion, carries out precoding processing on detection signals by using a conjugate transpose matrix of the filtration matrix, and then transmits the detection signals to the service base station and an interference base station; and the service base station receives the detection signals from the mobile terminal and the detection signals from the interfered mobile terminal, estimates a downlink equivalent channel transmission matrix from the base station to a serviced mobile terminal and a downlink equivalent channel transmission matrix from the base station to the interfered mobile terminal; generates a precoding matrix based on a predetermined rule, and then carries out precoding process the signals to be transmitted with the matrix and transmits the signals to the serviced mobile terminal. The invention can improve the performance for interference elimination and reduces expense of detection signals without extra signalling expense.

Description

technical field [0001] The present invention relates to a wireless communication network based on multi-cell MIMO, in particular to a wireless communication network based on multi-cell cooperative single base station multi-antenna processing. Background technique [0002] The evolution of standards such as IEEE820.16m and 3GPP LTE+ aims to achieve higher average sector throughput and user throughput at the cell edge. These objectives are particularly challenged in low-frequency reuse systems where system performance is highly limited by inter-cell interference. Many techniques for solving inter-cell interference problems have been widely discussed in IEEE820.16m and 3GPP LTE+ standards. Among these technologies, interference nulling has become the most advanced due to its simplicity, minimal impact on the current system, low overhead, and the ability to increase cell edge throughput without sacrificing average sector throughput. One of the promising options. [0003] The ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/02H04B7/26H04B7/04
Inventor 吴克颖宋扬杨红卫
Owner ALCATEL LUCENT SHANGHAI BELL CO LTD
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