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Transmission control device, wireless base station and transmission rate control method

A transmission rate and transmission control technology, applied in the fields of wireless base stations, transmission rate control, and transmission control devices, can solve the problem of not reducing the processing load of transmission rate control, etc.

Inactive Publication Date: 2004-10-20
NTT DOCOMO INC
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this current method does not reduce the processing load at the time of transmission rate control

Method used

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  • Transmission control device, wireless base station and transmission rate control method
  • Transmission control device, wireless base station and transmission rate control method
  • Transmission control device, wireless base station and transmission rate control method

Examples

Experimental program
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Effect test

Embodiment approach 2

[0062] Figure 4 It is a diagram showing an example of a transmission power management table according to Embodiment 2 of the present invention. The transmission power management table is referred to when the mobile station selection unit 24 selects the number of mobile stations. In Embodiment 2, when the mobile station selection unit 24 selects a mobile station to be controlled by the transmission rate, it bases the ratio of the measured value of the total transmission power (total transmission power of the radio base station) on the predetermined power value (threshold value) To determine the number of mobile stations. In the above-mentioned transmission power management table, the number of mobile stations is managed in association with the ratio between a predetermined threshold and the measured value of the total transmission power of a plurality of mobile stations n. For example, management is performed so that when the predetermined power value is 30 dBm, more mobile ...

Embodiment approach 3

[0068] Figure 5 It is a flowchart showing the procedure of the transmission rate control processing according to Embodiment 3 of the present invention. In this example, MS1 (mobile station), MS2, and MS3 communicate at 128kbps, 128kbps, and 64kbps, respectively, each MS measures the transmission quality of the downlink, and when the measured value of the transmission quality is less than or equal to a predetermined value, the BS (wireless base station) ) to send a transmission rate change request. At this time, the above-mentioned transmission rate change request is included in the transmission quality measurement value information reported from the MS side.

[0069] When the BS receives a transmission rate change request from MS2, it performs control to decrease the transmission rate of MS2 (128 kbps→64 kbps in this example), and starts downlink signal transmission with transmission power suitable for the changed transmission rate.

[0070] According to the third embodimen...

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Abstract

Provided is a transmission control apparatus capable of relieving a processing load at control of a downlink transmission rate of a mobile station even when transmission power is increased due to deterioration of a propagation environment or the like. The transmission control apparatus for controlling a transmission rate of a downlink of a communication terminal on the basis of downlink transmission quality solves the problem above and is characterized in to include: a transmission quality acquisition means for the downlink transmission quality of a plurality of communication terminals; a communication terminal selection means for selecting a communication terminal for changing the downlink transmission rate among the plurality of communication terminals in response to the acquisition result of the transmission quality acquisition means; and a transmission rate revision means for revising the downlink transmission rate of the communication terminal selected by the communication terminal selection means.

Description

technical field [0001] The present invention relates to a transmission control device, a wireless base station and a transmission rate control method, specifically, a transmission control device, a wireless base station and a transmission rate control method for controlling the transmission rate of a mobile station in the downlink direction according to the transmission quality in the downlink direction. Background technique [0002] In the WCDMA (Wideband Code division Multiple Access) method adopted in the third-generation mobile communication system, each channel in communication is subject to interference from other communication channels (Multiple Access Interference: MAI) and multi-channel interference from its own communication channel ( Multi-Path Interference). The mobile communication system using the WCDMA method has limited network access capacity due to the above-mentioned interference. Therefore, within the range in which each channel satisfies the required qu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L29/08H04B7/26H04L1/00H04W52/14H04W52/26H04W52/34
CPCH04L1/0002H04L2001/0093H04L1/0026H04W52/346H04W52/267H04W52/143
Inventor 文盛郁中村武宏石井美波
Owner NTT DOCOMO INC
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