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Call admission control method based on multistage degradation

A call access control, first-class technology, applied in access restrictions, network traffic/resource management, electrical components, etc., can solve the problem of not considering the extra bandwidth of audio and video broadcasting and multicast services, and unable to maximize the use of wireless transmission. System, can not effectively reduce the probability of new call blocking probability, switch call discard probability and other problems, to achieve the effect of excellent new call blocking probability and excellent handover call discard probability

Inactive Publication Date: 2010-08-11
INST OF ACOUSTICS CHINESE ACAD OF SCI
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Problems solved by technology

[0004] The disadvantage of this method is that it does not consider the extra bandwidth occupied by audio and video broadcast and multicast services, so it cannot maximize the use of the bandwidth of the wireless transmission system to support more access services, and cannot effectively reduce the blocking probability of new calls and the drop probability of handoff calls

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  • Call admission control method based on multistage degradation
  • Call admission control method based on multistage degradation
  • Call admission control method based on multistage degradation

Examples

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Embodiment Construction

[0037] The present invention will be further described below in conjunction with the accompanying drawings:

[0038] Call access control is generally implemented by a call access control system, which is hereinafter referred to as a control system for short. as attached figure 1 As shown, according to an embodiment of the present invention, a multi-level downgrade call access control method is provided, including the following steps:

[0039] (1) Control call access service by combining adaptive bandwidth and multi-queue strategy

[0040] (1.1) Establish multiple buffer queues

[0041] Buffer queues are established for call access services according to priorities, and each priority corresponds to a buffer queue.

[0042]The length of the buffer queue can be set as required, for example, 5, 8, and 16 can be used. If the control system used to implement the method requires, the number of queues can also be increased, for example, 100 queues. Taking three queues as an example...

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Abstract

The invention provides a call admission control method based on multistage degradation, comprising the following steps: (1) controlling the call admission service by combining adaptive bandwidth and multi-queue strategy; performing step (2) when the residual bandwidth is less than the minimum bandwidth of the current call admission service; and (2) reducing the bandwidth occupied by audio-video broadcast or / and multicast services for the current call admission service to use. In the step (2), the broadcast or multicast services have degradation states in multiple stages; the degradation statein each stage corresponds to a certain proportion of bandwidth reduction; the audio-video broadcast or / and multicast services are degraded to different stages of degradation states gradually; and thebandwidth occupied by the audio-video broadcast or / and multicast services is gradually reduced until the residual bandwidth meets the requirement of the current call admission service. By degrading the audio-video broadcast and multicast services, the method realizes the requirement of admitting more services to the greatest extent under the condition of changeless total bandwidth.

Description

technical field [0001] The present invention relates to the field of radio resource management, and in particular, the present invention relates to a call access control method. Background technique [0002] Call access control CAC (Call Admission Control) was first proposed in the ATM network. In a wireless network, there are two types of call access requests: a newly originated call (OC, originating call) and a call requiring handover (HC, handoff call). OC refers to a call initiated by a user in the current cell, and HC refers to a call made by a user in another cell that needs to be handed over to the current cell due to mobility. The wireless transmission system decides whether to accept the call access request according to a certain call access control (CAC) method, not only to ensure that the access of new services will not affect the QoS of the accessed services too much, but also to ensure that as many as possible Therefore, the call access control method is a nec...

Claims

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Application Information

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IPC IPC(8): H04W4/06H04W28/20H04W48/16
Inventor 曾学文杨群刘马飞王劲林
Owner INST OF ACOUSTICS CHINESE ACAD OF SCI
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