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Forward power overload controlling method in CDMA system

An overload control, forward power technology, applied in code division multiplexing systems, transmission control/equalization, multiplexing communications, etc., can solve problems such as increasing system complexity and increasing processor burden, etc. Achieve the effect of improving safe and reliable operation and rapid overload power control

Inactive Publication Date: 2003-02-26
ZTE CORP
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method increases the complexity of the system, especially in user-intensive areas or when the load is heavy, it will greatly increase the burden on the processor

Method used

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  • Forward power overload controlling method in CDMA system
  • Forward power overload controlling method in CDMA system
  • Forward power overload controlling method in CDMA system

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Embodiment Construction

[0025] Forward power overload control and forward power control are closely related, the relationship between the two can be used figure 1 Clearly, the thin solid arrows in the figure represent the outer loop power control, the thick solid arrows represent the power overload control, and the dotted arrows represent the inner loop power control. Forward power control is divided into outer loop power control and closed loop power control. The outer loop power control is implemented on the mobile phone (MS) side, and the closed loop power control is jointly implemented by the base station (BTS) and the mobile phone. Outer loop power control is implemented in this way: when the mobile phone receives the forward frame, it demodulates and decodes 100 to obtain the frame quality information and Eb / No, uses the frame quality information to count the frame error rate 110 of the forward frame, and compares it with the system setting The set Eb / No threshold value 120 is adjusted by comp...

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Abstract

The forward power overload controlling method for CDMA system includes counting total emitting power in every frame of system; averaging total emitting power in every overload period to obtain the total system power in the overload period; comparing the total system power in the overload period with preset several levels of overload controlling threshold to judge the system power load case; and starting corresponding overload control operation if the total system emitting power is greater than the lower preset threshold P1. The present invention considers the control speed and validity of overload control and the utlization of system power resource and raises the system capacity while ensuring system safety and relaibility.

Description

technical field [0001] The invention relates to a power control method of a wireless communication system, in particular to a forward power overload control technology in a Code Division Multiple Access (CDMA) communication system. Background technique [0002] Generally, there are three types of wireless spread spectrum communication technologies used in digital cellular mobile communications: Frequency Division Multiple Access (FDMA), Time Division Multiple Access (TDMA) and Code Division Multiple Access (CDMA). Among them, the first two multiple access methods, FDMA and TDMA, each voice channel occupies a certain bandwidth or time width. When the frequency reuse coefficient is constant, the voice channel capacity of the cell is determined. The other multiple access method, CDMA, has great advantages in improving system capacity, alleviating the contradiction between limited frequency band and unlimited user requirements, and meeting operators' needs for high-capacity, che...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/26H04J13/02
Inventor 周学梅胡留军乔嘉王跃夏树强
Owner ZTE CORP
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