Communication system volume expansion method

A communication system and signal technology, applied in wireless communication, electrical components and other directions, can solve the problems of beam collision, co-channel interference, etc., to reduce interference, improve spectrum utilization and system capacity, and improve spectrum utilization and system capacity. Effect

Inactive Publication Date: 2010-06-23
PEKING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, allocating forward beams according to users at different angles in a cell can avoid inter-beam interference in the same cell, but beams in adjacent cells may collide, resulting in large co-channel interference (such as Figure 1 shows that beam 1 and beam 2 collide)

Method used

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  • Communication system volume expansion method
  • Communication system volume expansion method
  • Communication system volume expansion method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] First, the location information between base stations of adjacent cells is obtained. The positions of adjacent base stations are relatively fixed, and the position information between the base stations has been basically determined when the base stations are set up, or determined through the cable and optical cable transmission signals between the base stations.

[0044] The second step is to obtain the location information and channel quality information of the mobile terminal. The location information and channel quality information of the mobile terminal are obtained through the received uplink signal.

[0045]The third step is planning and coordinating forward beam transmit power between adjacent cells in the next time slot to avoid inter-beam interference. From the first and second steps, the base station of each cell can obtain the location information of its surrounding adjacent base stations, as well as the location and channel quality information of the mobile...

Embodiment 2

[0049] First, the location information between base stations of adjacent cells is obtained. The positions of adjacent base stations are relatively fixed, and the position information between the base stations has been basically determined when the base stations are set up, or determined through the cable and optical cable transmission signals between the base stations.

[0050] The second step is to obtain the location information of the mobile terminal. The location information and channel quality information of the mobile terminal are obtained through the received uplink signal.

[0051] The third step is to plan and control the direction of the forward beam forming of the next time slot in each cell to realize beam avoidance.

[0052] a) Cell sectorization. The cell is sectorized first, and each cell is divided into several sectors with the base station as the center. Such as Figure 5 Shown, the situation when 3 sectors are given.

[0053] b) Coordinate forward beam a...

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Abstract

The invention discloses a communication system volume expansion method, which belongs to the wireless communication field. The method comprises the following steps: firstly, determining the relative position information of each base station and adjacent base stations; determining the position information and the signal channel quality information of a mobile terminal in a subdistrict through received up-running signals; then, coordinating a forward wave beam between adjacent subdistricts at a next down-running time interval by each base station according to the relative position information, the mobile terminal position information and the signal channel quality information to avoid the interference between the forward wave beams of the adjacent subdistricts; and finally, carrying out the wave beam molding for sending the coordinated forward wave beam as the down-running signals. At the same time, the invention adds an antenna patch in the base station, and the antenna patch is used for receiving the up-running signals for further expanding the volume. Compared with the prior art, the invention can avoid the interference between the signal wave beams, can improve the frequency spectrum utilization rate and the system volume, and simultaneously realizes the transmission of the up-running and down-running data at the same frequency and the same time interval is realized through adding the antenna patch, so the system volume is further and greatly improved.

Description

technical field [0001] The invention relates to a capacity expansion method applied to a communication system, aiming at avoiding or reducing interference between signal beams, improving frequency spectrum utilization, and expanding system capacity; it is suitable for the field of wireless communication. Background technique [0002] A basic task of the wireless communication system is to establish and maintain the communication link between the wireless terminal and the base station, to realize the two-way transmission of communication data, and the link from the base station to the wireless terminal is called the forward (or downlink) link. ; The link from the wireless terminal to the direction of the base station is called the reverse (or uplink) link. According to different duplex modes, communication systems are generally classified into time division duplex (TDD) systems and frequency division duplex (FDD) systems. [0003] The TDD system uses the same frequency for u...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W88/08
Inventor 焦秉立李建业马猛张雷鸣
Owner PEKING UNIV
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