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Closed-loop power controlling method in radio communication system

A closed-loop power control, wireless communication system technology, applied in wireless communication, transmission control/equalization, power management, etc., can solve problems such as shortage of dedicated signaling resources, insufficient dedicated resources, etc., to ensure power control effects, The effect of reducing the demand for system resources and reducing the frequency of power control

Inactive Publication Date: 2006-04-26
北京墨丘科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0019] Therefore, using the traditional power control method, it is necessary to adjust the power of all users with services within a certain transmission time interval, and it is necessary to use dedicated resources to ensure that all users who transmit / receive services at the same time in code division can receive / Send out their own power control commands; in this way, for communication systems where the resources for transmitting dedicated signaling are relatively short and power control is necessary, there are often situations where there are not enough dedicated resources for the transmission of power control commands

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  • Closed-loop power controlling method in radio communication system
  • Closed-loop power controlling method in radio communication system
  • Closed-loop power controlling method in radio communication system

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Embodiment Construction

[0044] To control the transmission power in the wireless communication system, it is not necessary to periodically adjust the power of each user at the same time, but only need to control the power of the most needed users. In this way, the present invention can allocate a small amount of system resources adjust the transmission power of the required users in a manner; the specific implementation mode of the present invention is as follows figure 1 , figure 2 Shown:

[0045] The closed-loop power control method in the wireless communication system of the present invention includes: forward closed-loop power control and reverse closed-loop power control, wherein:

[0046] The forward closed-loop power control includes:

[0047] Step 1: The mobile station determines the current signal-to-interference ratio target value SIR_target, and measures the SIR (signal-to-interference ratio) of the received demodulated base station signal at regular intervals T;

[0048] At the same t...

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Abstract

This invention concerns a method of closed loop power control in wireless communication system. The method includes: the receiving end measures signal-to-jamming ratio value of receiving signal; and judging the signal-to-jamming ratio of received signal whether or not being in the range of threshold value; according the measuring value the receiving end informing transmit whether to make power adjustment. The current invention doesní»t make power control to all operation users periodically, only make a control to the users that need power adjustment, namely to users of signal-to-jamming ratio exceeding certain range send down TPC order, reduce power control frequency, save code resources, assure basic effects of power control. This Invention is applied especially in the wireless communication systems that doní»t need to support fast mobile users, and some wireless communication system that have less resource for transferring definite purpose signaling.

Description

technical field [0001] The present invention relates to the technical field of wireless communication, in particular to a closed-loop power control method in a wireless communication system. Background technique [0002] For some self-interfering wireless communication systems, such as CDMA (Code Division Multiple Access) communication systems, multiple users are code-division multiplexed at the same time, making channel fading and multi-path interference significantly restrict the system capacity. In order to reduce the interference level as much as possible, for the uplink, it is necessary to maintain the transmit power of each mobile station on the basis of just meeting the communication requirements. Can obtain approximately equal received power; for the downlink, it is necessary to reduce adjacent cell interference and multipath interference. [0003] In order to reduce the interference level, power control technology is usually used; by estimating the energy or signal...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04Q7/20H04B7/26H04B7/005H04W52/08
Inventor 周雷马莎
Owner 北京墨丘科技有限公司