支持媒体多径中继传输的IMS会话协商机制

A Session Negotiation Mechanism in IMS Supporting Relaybased Media Multipath Transport

针对IMS(IP multimedia subsystem)目前尚不支持媒体多径中继传输模式,提出一种支持媒体多径中继传输的IMS会话协商管控机制.将多径传输功能以一种业务形式引入至IMS系统,将基于应用层中继的多径传输框架MPTS-AR与IMS系统相结合,使得IMS网络侧能够对媒体传输进行多径管理.结果表明,所提方法不仅最大程度地重用IMS现有的网络架构,保护IMS系统的已有资金投入,提高方案可实施性;而且使得IMS网络侧有能力为用户提供差异化的媒体传输服务质量.

Due to IMS（ IP multimedia subsystem） does not support media relay-based multipath transmission mode at present,a session negotiation mechanism in IMS supporting media relay-based multipath transport was presented. Multipath transmission function was introduced to IMS system in a form of service. The multipath transport framework based on application-layer relay was combined with IMS system seamlessly. The network side of IMS was enabled to manage media multipath transmission process. The proposed mechanism not only maximize the reuse of existing IMS network infrastructure to protect the early capital investment and improve the scheme＇s practicability,but also enable the network side of IMS to have the ability to provide users with differentiated media transmission quality.