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CSCF entity disaster-tolerance and load-balancing system and method

A load balancing and P-CSCF technology, applied in the IMS field, can solve problems such as increasing the IMS network load, and achieve the effect of reducing the network load and reducing the number of

Inactive Publication Date: 2012-10-10
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] If there are multiple physical entities in the P-CSCF entity, I-CSCF entity, and S-CSCF entity in the IMS network, a considerable number of SIP OPTIONS signaling for network element availability detection will be added to the network, increasing the IMS network load

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  • CSCF entity disaster-tolerance and load-balancing system and method
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  • CSCF entity disaster-tolerance and load-balancing system and method

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Embodiment Construction

[0033] The present invention will be further described in detail below in conjunction with the accompanying drawings and preferred embodiments.

[0034] Such as figure 2 As shown, it is a schematic structural diagram of the system shown in the present invention, including a P-CSCF entity, an I-CSCF entity, an S-CSCF entity, a UE, and a DNS Server. In this embodiment, it is assumed that there are m P-CSCF entities and n I-CSCF entity, p S-CSCF entities, of which,

[0035] The P-CSCF entity and the I-CSCF entity are used to collect its own load parameters regularly, and convert the load parameters into load equivalents, calculate the absolute value of the difference between the current load equivalent and the previous load equivalent, and use the absolute value to The preset threshold value is compared, and if the absolute value is greater than or equal to the threshold value, the current load equivalent is reported through the DNS UPDATE message immediately; otherwise, the latest l...

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Abstract

The invention relates to a CSCF entity disaster-tolerance and load-balancing system and method, wherein the system comprises a P-CSCF entity, an I-CSCF entity, an S-CSCF entity and a DNS Server; the method is as follows: all CSCF entities submit their load weight respectively to a DNS Server at regular time; the DNS Server adjusts a corresponding CSCF list according to load weight received; when a source CSCF entity has SIP registering signaling needing to be out, DNS inquiry signaling is transmitted to the DNS Server; the DNS Server returns SRV records of a target CSCF entity with minimal load weight in the CSCF list; the source CSCF entity routes SIP registering signaling to the target CSCF entity which the SRV records are corresponding to. The invention lightens the load of IMS networks.

Description

Technical field [0001] The invention relates to the field of IMS (IP Multimedia Subsystem, IP Multimedia Subsystem), in particular to a CSCF (Call Session Control Function, call session control function) entity disaster tolerance and load balancing system and method. Background technique [0002] In the IMS network, the CSCF entity acts as a call session control entity, and its operational reliability is of great significance to the reliable operation of the entire IMS network. In order to ensure the reliable operation of the entire IMS network, the existing IMS proposes the idea of ​​network element availability detection and adjacent network element load balancing selection. The idea of ​​network element availability detection introduces a link detection mechanism in IMS, which uses the SIP (Session Initial Protocol) OPTIONS method to detect the availability of the link between the local network element and the adjacent network element. During the call connection process, the l...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L29/06H04L29/08
CPCH04L29/06217H04L29/14H04L65/1016H04L29/08144H04L29/12066H04L61/1511H04L69/40H04L67/1027H04L65/1046H04L65/1033H04L65/1073H04L67/1025H04L67/1004H04L61/4511H04L65/1104H04L67/1001
Inventor 徐兴民艾红芳韩健任鹏
Owner ZTE CORP