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A radio communication system, a repeater apparatus and a control method of the repeater

A wireless communication system and repeater technology, applied in wireless communication, radio transmission systems, transmission systems, etc., can solve the problems of untimely resending requests, increased processing time, inability to meet the requirements of mobile communication wireless interface standards, etc. The effect of setting the number of base stations, improving throughput, and improving the cost performance of base station setting

Inactive Publication Date: 2010-02-10
HITACHI LTD
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Problems solved by technology

However, due to the buffering or repeated processing of the signal, the processing time increases, so the signal is delayed from several frames to dozens of frames compared to the signal directly communicated between the base station and the terminal
Due to this delay, for example, the retransmission request of Hybrid ARQ becomes untimely, and the requirements of the wireless interface standard (UMB, etc.) of mobile communication cannot be met.

Method used

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  • A radio communication system, a repeater apparatus and a control method of the repeater
  • A radio communication system, a repeater apparatus and a control method of the repeater
  • A radio communication system, a repeater apparatus and a control method of the repeater

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Embodiment Construction

[0079] The present invention provides a method for increasing the coverage area of ​​a base station and distributing load among base stations by using a repeater in a wireless communication system.

[0080] figure 1 It is an explanatory diagram showing an example of the wireless communication system according to the first embodiment of the present invention.

[0081] Base station (BS) 101 covers the area of ​​cell 102 (in figure 1 In the example of , the area enclosed by the thick line), the cell 102 is divided into a plurality of sectors 103 (in figure 1 In the example, 3 hexagonal areas around the base station 101). The base station 101 exchanges data with other base stations or other communication systems via a base station controller (BSC) 104 and a PDSN (Packet Data Serving Node) 105 . The base station 101 exchanges data with other communication systems via the IP network 106 .

[0082] Figure 2A It is an explanatory diagram showing the first problem of the conventi...

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Abstract

Provided is a radio communication system including a plurality of base stations and a repeater apparatus, in which the repeater apparatus amplifies and transmits a radio signal received from at leastone of the plurality of base stations, and controls a domain in which the radio signal is transmitted based on a traffic amount of each of the plurality of base stations. Accordingly, the number of installed base stations which are costly is reduced, and an operating rate of the respective base stations is gained along with the decrease in number of installed base stations.

Description

technical field [0001] The present invention relates to a wireless communication system including a repeater device and a repeater control device as constituent elements. Background technique [0002] First, the background of the wireless mobile communication system will be described. [0003] In a wireless communication system, a base station device connected to a backbone network and a terminal device having only a wireless I / F wirelessly transmit data signals (including audio signals). [0004] As an interface standard for this wireless part, there is UMB (Ultra Mobile Broadband), for example. UMB belongs to the so-called 3.9th generation mobile communication system. In the standard document, the rules of the transmission method of the data signal, the control signal, etc. are stipulated for each base station and each terminal. [0005] UMB adopts OFDMA (Orthogonal Frequency Division Multiple Access) and CDMA (Code Division Multiple Access) methods to transmit data sig...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W16/26H04W16/28H04W28/08H04W88/04
CPCH04W16/08H04W16/26H04J11/0069H04B7/1555
Inventor 藤岛坚三郎上野幸树
Owner HITACHI LTD
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