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Multi-base station cooperative user interference suppressing method for cell system

A cellular system and interference suppression technology, applied in the direction of diversity/multi-antenna systems, etc., can solve the problems of mutual interference between users in adjacent cells, and achieve the effect of interference elimination and interference elimination

Inactive Publication Date: 2009-03-25
HARBIN INST OF TECH
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Problems solved by technology

[0004] In order to solve the problem of mutual interference between adjacent cell users in the existing communication system, the present invention provides a multi-base station cooperative user interference suppression method in a cellular system

Method used

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  • Multi-base station cooperative user interference suppressing method for cell system
  • Multi-base station cooperative user interference suppressing method for cell system
  • Multi-base station cooperative user interference suppressing method for cell system

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specific Embodiment approach 1

[0012] Specific implementation mode one: see Figure 1 to Figure 4 , this embodiment consists of the following steps:

[0013] Step 1. The base station divides the cell into three sectors according to the three directional antennas, and divides the channel sets used by each cell into three non-overlapping groups. Each group is applied to a sector, so the channels in different sectors Users do not interfere with each other. In the direction of each sector, two adjacent base stations are selected as cooperative base stations, that is, adjacent sectors from three adjacent base stations form a cooperative system. One of the three coordinated base stations is selected as the main base station, and other coordinated base stations inform the main base station of the channels they use in the coordinated system. The three cooperative base stations can know the list of all users in the cooperative system in advance by communicating with each other.

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Abstract

A method for suppressing the interference of users through the cooperation of a plurality of stations of a cellular system relates to a method for eliminating the interference of users through the cooperation of a plurality of stations, and aims at solving the problem of the mutual interference between adjacent subdistricts in the prior communication system. A base station is chose to serve as a cooperative base station and a base station is chose to serve as a main base station in a sector and two sectors which are adjacent to the sector and are from different subdistricts; both of each cooperative base station and each main base station conduct the detection on the received signal quality of all users and arrange a limitation of a signal-to-noise ratio of receiving a signal; both of each cooperative base station and each main base station conduct the interference elimination, demodulate all strong user signals which are beyond the limitation of the signal-to-noise ratio of receiving the signal to be sent to a local baseband processing unit; each cooperative base station sends the remaining user signals in the received signals to the main station; and the main station conducts the interference elimination again after combining the user signals of coming from the cooperative base station which are not demodulated, and the user signals of the local which are not demodulated, and sends the signals which have the interference elimination after being combined to the local base band processing unit.

Description

technical field [0001] The invention relates to a multi-base station cooperative user interference elimination method, which belongs to the base station cooperative communication technology in the field of wireless communication. Background technique [0002] Multi-cell joint detection or multi-base station cooperation has become one of the promising research directions of the next generation mobile communication system. Multi-base station cooperation actively utilizes inter-cell interference instead of treating it as noise, and effectively eliminates inter-cell interference by introducing path diversity of different base stations, thus improving the communication quality of cell border users. [0003] At present, the research on base station cooperation mainly focuses on the grouping and selection of cooperative base stations, how to reduce the burden of communication links between base stations, and the joint detection method of multiple users. The problem of interference...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/02
Inventor 沙学军孙丽楠蒋韡琳王荆宁卢为党张中兆张乃通
Owner HARBIN INST OF TECH
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