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以Presence/IM为代表的OTT业务具有实时在线、随时随地沟通的便利性成了移动互联网时代的应用热点.在当前电信标准体系中,Presence/IM实现机制分为SIMPLE和XMPP两大类,但这两类协议制定较早,在流量、功耗及传输上都没考虑移动互联网的特点,本文将在分析SIMPLE和XMPP协议的基础上,提出一种基于订阅/发布模型的移动互联网Presence/IM机制并给出具体实现,并重点阐述多终端同时在线情况时的消息路由机制.最后将本文提出的协议与SIMPLE和XMPP进行了对比分析.
The OTT service represented by Presence / IM is real-time online, and the convenience of communication anytime, anywhere has become an application hotspot in the era of mobile Internet. In the current telecommunication standard system, the implementation mechanism of Presence / IM is divided into two categories: SIMPLE and XMPP Both of these protocols have been established earlier and have not considered the characteristics of mobile Internet in traffic, power consumption and transmission. Based on the analysis of SIMPLE and XMPP protocols, this paper proposes a mobile Internet Presence / IM based on subscription / publish model Mechanism and gives the concrete realization, and focuses on the message routing mechanism when multiple terminals are online at the same time.Finally, the protocol proposed in this paper is compared with SIMPLE and XMPP.