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Radio communication system, base station apparatus, and downstream transmission directing characteristic control method used therefor

By using controllable directivity antennas in base station equipment to calculate and equalize the downlink communication bit rate of each sector, the problem of high communication rate terminal interference in the CDMA system is solved and the system communication capability and stability are improved.

Inactive Publication Date: 2006-03-08
NEC CORP
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This problem cannot be solved even with the techniques in the above patent references

Method used

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Embodiment Construction

[0019] Next, embodiments of the present invention will be described with reference to the drawings. figure 1 is a block diagram showing the configuration of a base station device according to an embodiment of the present invention. refer to figure 1 , the base station device according to the embodiment of the present invention is an adaptive antenna base station device used in a radio communication system, more specifically, a mobile communication system utilizing a CDMA (Code Division Multiple Access) scheme for The downlink transmission directional characteristic control is performed at the communication bit rate obtained by dividing the cells representing the service area of ​​the base station.

[0020] In the above background, the base station apparatus of this embodiment performs zone control so that the downlink bit rate of each zone is as uniform as possible, considering that interference of downlink communication in a radio communication system based on the CDMA sch...

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Abstract

A communication bit rate computing unit (24) computes the cumulative bit rate of downlink communication data, at which a base station communicates with a terminal, and totalizes the bit rates for each sector area. A amplitude / phase control unit (23) checks whether the cumulative bit rate for each sector area, reported from the communication bit rate computing unit (24), is higher than a first threshold or lower than a second threshold. If the cumulative bit rate is higher than the first threshold, the amplitude / phase control unit (23) performs directing characteristic control so as to narrow the area range of the corresponding sector area to a range smaller than a standard area range. If the cumulative bit rate is lower than the second threshold, the amplitude / phase control unit (23) performs directing characteristic control so as to widen the area range of the corresponding sector area to a range larger than the standard area range.

Description

technical field [0001] The present invention relates to a radio communication system, a base station device, a downlink transmission directional characteristic control method used therein, and a program therein, and more particularly, relates to a communication between terminals in a radio communication system based on a CDMA (Code Division Multiple Access) scheme. reduction of interference. Background technique [0002] A radio communication system based on the CDMA scheme is a communication scheme characterized by reducing interference between communication terminals by assigning codes having orthogonality to respective communication terminals and multiplexing communication signals using the codes. On the other hand, current mobile communication systems have been standardized so as to support not only voice communication but also packet data communication and the like. In a mobile communication system based on the CDMA scheme, it is possible to change the spreading rate (...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04Q7/36H04B1/707H04B1/7097H04B7/06H04B7/10H04W16/02H04W16/04H04W16/24H04W16/28H04W16/30H04W28/08H04W28/10
CPCH04W28/22H04W16/04H04W28/10H04W16/24
Owner NEC CORP