IMS policy deciding functional entity and implementing method bearing resource control thereof

Abstract

The invention discloses an IMS policy decision function entity, which comprises a Diameter adaptor, an entitlement management module, a COPS adaptor, a bearer management module, an LDAP adaptor, a resource monitoring module and a policy decision module; the entitlement management module receives and processes messages from the Diameter adaptor and triggers the policy decision module to perform session entitlement decision; the policy decision module obtains an admission policy through the resource monitoring module and then obtains policy rules and production policy through the LDAP adaptor, and SBLP information is updated by the entitlement management module; the bearer management module receives and processes messages from the COPS adaptor and triggers the policy decision module to perform bearer entitlement; and the policy decision module sends the production bearer policy to GGSN. The invention also discloses a realization method for the policy-based bearer resource control through the policy decision function entity. The QoS resource entitlement management and the IMS bearer resource management are accomplished through the policy decision function entity of the invention, and thereby a new efficient solution is provided for the end-to-end QoS deployment.

Description

technical field [0001] The present invention relates to the technical field of IP Multimedia Subsystem (IP Multimedia Subsystem, IMS), in particular to the design and implementation of policy-based bearer resource control of a Policy Decision Function (PDF). Background technique [0002] Looking back at the development history of mobile communication, communication technology has gone through the first generation of analog communication, the second generation of digital communication, and is now entering the era of third generation multimedia communication. The Third Generation Partnership Project 3GPP proposed four versions of R99, R4, R5 and R6 respectively during the evolution from GSM to UMTS, providing a smooth path for this evolution transition. In R5, 3GPP proposed an all-IP core network structure. IMS is the center of the UMTS core network that provides end-to-end multimedia services and trunking multimedia services. It is used to handle the increasing IP multimedia ...

AI Technical Summary

Problems solved by technology

Moreover, end-to-end resource-based admission control cannot be provided: as long as the session can be established at the application layer, PDF will authorize all QoS resource requests; while GGSN can only perform admission control based on local bearer resources

This solution only provides the access network QoS guarantee mechanism. If the IMS service network or external network is limited by resources or network congestion, the end-to-end QoS of the session will not be guaranteed

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