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Mobile communication system, emitting power controlling method and base station thereof

A technology for transmitting power control and mobile communication systems, which is applied in power management, transmission systems, wireless communication, etc., and can solve the problems of decreasing average data transmission rate, waste, and inability to increase data transmission rate.

Inactive Publication Date: 2009-04-29
NEC CORP
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0015] As a result, higher speed modes are used for modulation / coding modes, with the disadvantage that the average data transfer rate will drop
[0016] Even when the number of DPCH channels used is very small, because the transmit power of HS-PDSCH is constant, as shown in Figure 2, part of it is wasted
In addition, because the transmission power of HS-PDSCH is constant, and the data transmission rate cannot be increased much, so when providing best-effort service, the transmission rate cannot be increased much, and the delay time cannot be reduced much

Method used

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  • Mobile communication system, emitting power controlling method and base station thereof
  • Mobile communication system, emitting power controlling method and base station thereof
  • Mobile communication system, emitting power controlling method and base station thereof

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Embodiment Construction

[0043] Preferred embodiments of the present invention are described below with reference to the accompanying drawings. image 3 To illustrate the principle of the present invention, in the present invention, the sum of the downlink transmission powers of the channels where the base station transmits signals is constant. exist image 3 The CPICH is a pilot channel, and its transmit power remains constant as usual (see Figure 2). The transmit power of a DPCH comprising a single channel of a single mobile station varies according to the number of mobile stations served in the conventional case (see FIG. 2 ).

[0044] The difference between the present invention and the traditional situation is that the transmission power of the high-speed / large-capacity shared channel HS-PDSCH (hereinafter abbreviated as PDSCH) is controlled according to the variation of the transmission power of the DPCH, and the transmission power of the base station downlink channel and are constants. can a...

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Abstract

A sum of transmission powers for all channels for transmissions from a base station to mobile stations is controlled to constant. Specifically, the transmission power for a high speed and high capacity shared channel is controlled such that a sum of transmission powers for individual channels for individual mobile stations, and the shared channel is always constant. With this constitution, an interference wave power from neighboring cells becomes constant, an average data transfer rate of the shared channel becomes constant, a prediction precision for a wait time for sending / receiving data increases, a lower limit for an actual data transfer rate becomes high, and the number of users in a service quality assurance type service increases. Additionally, when the number of individual channels in use is low, the transmission power for shared channel can increase, and the transmission rate increases and the time decreases when a best effort type service is provided.

Description

technical field [0001] The present invention relates to a mobile communication system, a transmission power control method used in the mobile communication system, and a base station used in the mobile communication system, in particular, a transmission power control method used in the base station of the mobile communication system Power control method, this mobile communication system includes a base station and a mobile station, the base station uses one or two of a single channel and a shared channel shared with other mobile stations to transmit data from the base station. Background technique [0002] Multimedia technology is being developed for handling a large number of still images and intermittent moving images on mobile terminals (mobile stations) such as cellular phones. There is HSDPA (High Speed ​​Downlink Packet Access) method as a large capacity / high speed data transmission method, and people are still considering a data transmission method like HS-PDSCH (High...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W52/34H04W52/36H04B1/04H04B7/005H04B7/26
CPCH04W52/36H04W52/346H04W52/30H04W88/08
Inventor 滨边孝二郎
Owner NEC CORP
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