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Method for realizing access-admission control in WCDMA system

A technology of access control and access system, which is applied in the direction of access restriction, electrical components, radio/inductive link selection and arrangement, etc. It can solve the problems affecting the performance of the communication system, the prediction accuracy cannot be guaranteed, and the prediction method is complicated.

Inactive Publication Date: 2008-10-22
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] However, in reality, since the downlink load factor is already very large, the system will be in an unstable state after new users are connected, which will affect the performance of the communication system
Currently, there is no way to fix this
[0014] In addition, the prediction method of downlink power increment according to formula (2) is more complicated, and because ΔP DL Sensitive to related parameters, the prediction accuracy cannot be guaranteed; therefore, the reliability of the admission control process will be reduced

Method used

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  • Method for realizing access-admission control in WCDMA system
  • Method for realizing access-admission control in WCDMA system
  • Method for realizing access-admission control in WCDMA system

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Embodiment Construction

[0062] The core of the invention is to control the access of users according to the stable load factor value of the system, so as to effectively ensure that the stable load factor of the system will not exceed the set threshold value, so that the stability of the system is greatly improved.

[0063] The specific implementation of the method of the present invention is as follows figure 1 shown, including:

[0064] Step 11: After a new call arrives, the system first obtains the current downlink transmit power P DL，current , and the sum of the current demodulation threshold L DL , current = Σ i = 1 N ( Σ c / N o ) i ; ...

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Abstract

When user accesses WCDMA system, the method not only controls access of user based on transmitting power downward, but also carries out admittance control for accessing use based on factor value of steady load of system. Comparing with prior art, the invention guarantees down going coverage, and guarantees that system is in stable state. The invention overcomes disadvantages that when sub zone is smaller, system stability is not guaranteed effectively. The invention also simplifies method for forecasting down going power increment.

Description

technical field [0001] The invention relates to the technical field of wireless communication, in particular to a method for realizing admission control in a WCDMA (Wideband Code Division Multiple Access) system. Background technique [0002] The downlink carrier transmit power of WCDMA system can be expressed as: [0003] P DL = P cch + P N · L ‾ · Σ i = 1 N ( E c / N 0 ) i ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04Q7/38H04W48/06H04W48/08H04W48/16
Inventor 孙军林杨存东
Owner HUAWEI TECH CO LTD