S-CSCF (Serving-Call Session Control Function) allocation method based on service capability P2P (Peer-to-Peer) distribution

Abstract

The invention discloses an S-CSCF (Serving-Call Session Control Function) allocation method based on service capability P2P (Peer-to-Peer) distribution. The method comprises the following steps: whether nodes joining in a Reload (resource location and discovery) overlay network are S-CSCF nodes or I-CSCF (Interrogating-Call Session Control Function) nodes is judged; if the joining nodes are S-CSCF nodes, the S-CSCF nodes join in the Reload overlay network, construct a topology structure, and release on the Reload overlay network according to a service capability set capable of being provided by the S-CSCF nodes; the S-CSCF nodes search in the Reload overlay network by taking all service capability values owned by the S-CSCF nodes as key values, so as to obtain an SIP URI (Session Initiation Protocol Uniform Resource Locator) set of all the S-CSCF nodes corresponding to the service capability values; a ping heartbeat packet test is carried out on each S-CSCF node corresponding to the SIP URI set at set intervals; whether the S-CSCF nodes subjected to the ping heartbeat packet test receive response or not five times is judged; and if the S-CSCF nodes subjected to the ping heartbeat packet test do not receive the response five times, the S-CSCF nodes without the response are deleted from the SIP URI set. The S-CSCF allocation method based on the service capability P2P distribution has the advantages that the S-CSCF load balancing of a system is realized in a service capability layer level, the service capability of the system is improved, and service delay of the system is reduced.

Description

technical field [0001] The invention belongs to the field of mobile Internet and core control network of telecommunication operators, and more specifically relates to an S-CSCF distribution method based on service capability P2P distribution. . Background technique [0002] The IP Multimedia Subsystem (IMS) defined by the standard 3rd Generation Partnership Project (3GPP) proposes to query the call session control function (Interrogating Call Session Control Function, I-CSCF) according to the service The Server Capability of the Serving Call Session Control Function (S-CSCF for short) is allocated by the S-CSCF for the registered client (User Equipment, UE for short). However, in order to improve efficiency, the I-SCCF in the standard IMS requests all the S-CSCFs and their service capabilities in the IMS system from the home server (Home Subscriber Server, HSS for short) each time it is started, and then caches them locally. Real-time update, there is no mechanism to ensur...

AI Technical Summary

Problems solved by technology

However, in order to improve efficiency, the I-SCCF in the standard IMS requests all the S-CSCFs and their service capabilities in the IMS system from the home server (Home Subscriber Server, HSS for short) each time it is started, and then caches them locally. Real-time update, there is no mechanism to ensure that the S-CSCF cached by the I-CSCF and its corresponding service capabilities are consistent with the real service capabilities. CSCF and its service capabilities have single point of failure and performance bottlenecks. In addition, in the standard IMS, the problem of load balancing between S-CSCFs is not considered under the premise of meeting the user's service capability requirements.

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