Interference coordination method among downlink cells in relay wireless communication network

A wireless communication network and inter-cell interference technology, applied in wireless communication, network planning, electrical components, etc., can solve the problems of low user resolution and difficult interference avoidance, and achieve flexible interference coordination, less information, and beam coverage small effect

Inactive Publication Date: 2011-06-22
BEIHANG UNIV
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  • Abstract
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Problems solved by technology

[0006] The traditional system uses beamforming at the base station. Since the base station serves many users, the ability to di

Method used

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  • Interference coordination method among downlink cells in relay wireless communication network
  • Interference coordination method among downlink cells in relay wireless communication network
  • Interference coordination method among downlink cells in relay wireless communication network

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Embodiment Construction

[0034] The method for coordinating interference between downlink cells in the relay wireless communication network proposed by the present invention has a flow chart as shown in figure 1 shown, including the following steps:

[0035] (1) Each base station in the downlink of the relay wireless communication network sends an interference avoidance request to the base station of the adjacent cell. If the users served this time include users at the edge of the cell, the edge users are called "protection users". ", the interference avoidance request sent by the base station to the adjacent cell base station includes the number of "protection users" and the location information of the "protection users"; The number of "protection users" is recorded as zero in the interference avoidance request sent by the base station of the adjacent cell;

[0036] (2) Each base station receives the interference avoidance request from the base station of the adjacent cell. If the number of "protect...

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Abstract

The invention relates to an interference coordination method among downlink cells in a relay wireless communication network, belonging to the technical field of wireless communication. The base station of the downlink of the relay wireless communication network divides the user area of the cell into non-interference user and interference user according to amount and position of users on the adjacent cell service edge, traditional transmission mode is adopted for the non-interference user, and interference evaded transmission mode is adopted for the interference user. In the interference evaded transmission mode, a relay carries out wave beam forming on the position information of the adjacent cell-edge user and the channel information of the cell interference user so that the interferenceof the adjacent cell-edge user is effectively evaded. In the method, when all cells adopt the interference evading policy, the performance of all cell-edge users can be effectively protected so that the throughput of the cell-edge user can be improved.

Description

technical field [0001] The invention relates to a method for coordinating interference between downlink cells in a relay wireless communication network, and belongs to the technical field of wireless communication. Background technique [0002] In a cellular system, users at the cell edge receive poor signal energy and receive strong inter-cell interference energy. Therefore, the communication link quality of cell edge users is relatively low, which often cannot meet user quality of service (QoS) requirements. The cellular system can use inter-cell interference coordination technology to manage inter-cell interference, and use relay technology to improve the communication quality of cell edge users. [0003] Since the cell edge users are far away from the base station, when the base station adopts direct transmission, the signal energy that the edge users can effectively receive is low. If the transmit power of the base station is increased, more serious inter-cell interfer...

Claims

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Application Information

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IPC IPC(8): H04W16/26H04W16/28H04W72/08
Inventor 刘婷婷侯雪颖张千杨晨阳
Owner BEIHANG UNIV
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