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Forward power controlling method for CDMA clustered communication system

A technology of forward power and trunking communication, which is applied in the direction of code division multiplexing system, multiplexing communication, and communication between multiple stations, and can solve the impact of normal terminal use and the forward power of base station subsystem Limited resources, the method of forward power control cannot be directly applied to the CDMA trunking system, etc., to achieve the effect of improving system capacity and reducing consumption

Inactive Publication Date: 2009-06-10
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In the CDMA trunking communication system, since multiple trunking terminals share a forward shared channel (in order to distinguish it from the forward traffic channel in CDMA, a forward traffic channel shared by multiple trunking terminals is called a forward shared channel), The base station cannot perform power control on the respective forward traffic channels of each cluster terminal
Therefore, the method of forward power control in the CDMA system cannot be directly applied in the CDMA trunking system
Moreover, since the CDMA system is a self-interference system, affected by network planning and other factors, the forward power resources of the base station subsystem are limited. If the forward power value that can be received correctly is transmitted, the forward power of the system will be saturated quickly, which seriously affects the capacity of the cluster terminal and also has a certain impact on the normal terminal use in the current CDMA system

Method used

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  • Forward power controlling method for CDMA clustered communication system
  • Forward power controlling method for CDMA clustered communication system
  • Forward power controlling method for CDMA clustered communication system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] see figure 1 as shown, figure 1 It is a schematic diagram of realizing the forward power control of the cluster terminal in the present invention. The specific process is as follows:

[0019] Step 101, determine the basic transmit power of the base station. When the forward shared channel of the current trunking group is just established, because the network side does not know the distribution of the current trunking terminals in the area served by the local trunking group, the current trunking group All cluster terminals in the cluster can receive the information of the forward shared channel to determine the basic transmit power. Generally, the basic transmit power can be determined according to the value of the cell radius covered by the base station transmit power during network design.

[0020] Step 102, after the establishment of the forward shared channel, all cluster terminals of the current cluster group simultaneously monitor the information of the forward...

Embodiment 2

[0034] First, the same as Step 101 of Embodiment 1, determine the basic transmission power of the base station;

[0035] Then, after establishing the forward shared channel, each cluster terminal sends forward power control information to the base station. Since each power control, the base station has to receive forward power control messages from each terminal, and for cluster terminals, most of the terminals are in the state of listening but not talking, so the base station cannot know the current power control message. When comparing the power control information of multiple cluster terminals, how many cluster terminals are there in your own coverage area, it is likely to be incomplete. Therefore, the base station sets a time parameter after receiving the power control information sent by each cluster terminal. Any one of the cluster terminals expects to increase the transmit power value of the forward shared channel, then increase the transmit power value of the forward ...

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Abstract

This invention discloses a forward power control method in a CDMA cluster communication system including: determining the basic emit power of the base station, after setting up a forward shared channel at the cluster terminal, the current cluster set forward shared channel emit power value is regulated on the basis of ensuring the correct receiving by all clusters in the current cluster set form the basic emit power; which solves the problem of forward power control with one forward shared channel facing to multiple cluster terminals when increasing cluster functions in the CDMA system.

Description

technical field [0001] The invention relates to trunking communication technology, in particular to a method for forward power control of a code division multiple access trunking communication system. Background technique [0002] The Code Division Multiple Access (CDMA) standard belongs to one of the 3G system standard systems. It has been commercialized in many countries and provides voice and high-speed packet data services for terminals. The number of terminals that a single base station can support is limited by conditions such as code resources and power. . [0003] The CDMA trunking communication system is a communication system that upgrades the existing CDMA network to realize dedicated dispatching services. On the one hand, it can enable multiple trunking terminals to share wireless resources and improve the capacity of the wireless cellular system. On the other hand, the trunking system can provide The cluster function can meet the special requirements of some sp...

Claims

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Application Information

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IPC IPC(8): H04J13/02H04B7/26H04B7/005H04W52/20H04W52/24
Inventor 谭莹
Owner HUAWEI TECH CO LTD
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