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Radio communication system, base station and radio communication method

A wireless communication system and communication channel technology, applied in the field of autonomous decentralized wireless communication systems, to achieve the effect of reducing the impact of interference

Inactive Publication Date: 2008-08-20
KK TOSHIBA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] However, in autonomous decentralized wireless communication systems, in order to achieve higher frequency utilization efficiency, there is a tendency to reuse the same communication resources in adjacent base stations using beamforming and MIMO techniques, etc.
In this case, the interference from neighboring base stations still cannot be ignored, and the interference problem is more obvious when all base stations use the same format
[0006] In this way, in the conventional autonomous distributed wireless communication system, since all the base stations use the same slot format, there is a problem that the influence of interference from other cells (Cells) is large

Method used

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  • Radio communication system, base station and radio communication method
  • Radio communication system, base station and radio communication method
  • Radio communication system, base station and radio communication method

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Embodiment Construction

[0052] Hereinafter, embodiments of the present invention will be specifically described with reference to the drawings.

[0053] FIG. 1 is a diagram showing a configuration example of an autonomous distributed wireless communication system 10 according to the present embodiment. The autonomous distributed wireless communication system 10 is composed of a plurality of base stations BSA to BSE and a mobile station MS.

[0054] FIG. 2 is a diagram showing an example of a frame configuration of the autonomous distributed radio communication system 10 according to the present embodiment. One frame consists of a plurality of control channels CCH and communication channels TCH, and downlink channels (downlink control channels, downlink communication channels) and uplink channels (uplink control channels, uplink communication channels) are The time-division duplex communication method (TDD method) is time-divided. The control channel CCH and the communication channel TCH form a pair ...

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Abstract

The present invention is provided with a control channel searching unit 90 which measures reception power levels of a plurality of control channels, searches for a control channel having a small reception power level and thereby determines the control channel to be used, a format specification unit 140 which specifies a desired channel format from among a plurality of channel formats according to a determined control channel to be used and base station communication units 170,110, 120, 50, 40, 20 which communicate with a mobile station using the desired channel format.

Description

technical field [0001] The invention relates to an autonomous decentralized wireless communication system, in particular to a method for determining a channel format. Background technique [0002] The next-generation PHS system currently being researched is considered to be an autonomous decentralized wireless communication system that does not implement base station placement through careful calculation. In an autonomous distributed wireless communication system that uses communication resources in cooperation with surrounding base stations, even if the same format is used for all communication resources (slots), there is no problem from the original concept. In fact, in the current PHS, the formats of all communication time slots are basically the same. [0003] That is, in conventional autonomous distributed wireless communication systems such as PHS, all base stations use a common slot format (for example, refer to Non-Patent Document 1). [0004] Non-Patent Document 1...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/26H04B1/707H04J3/06H04W16/02H04W24/08H04W48/12H04W72/04H04W92/20
CPCH04L5/0062H04W72/0493H04L5/0007H04W48/12H04L5/003Y02B60/50H04W48/16H04L5/0066H04L5/0053
Inventor 坂耕一郎
Owner KK TOSHIBA