An Extension for SIP Instant Message Using Publish/Subscribe Mode
draft-zhengjp-sipcore-sipim-ext-01

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Last updated 2017-06-20
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Network Working Group                                     Jianping Zheng
Internet-Draft                                                Yichuan Wu
Intended Status: Experimental    China Mobile Communications Corporation
Expires: December 22, 2017                                    Weimin Lei
                                                               Wei Zhang
                                                                  Hao Li
                                                 Northeastern University
                                                           June 21, 2017

   An Extension for SIP Instant Message Using Publish/Subscribe Mode
                   draft-zhengjp-sipcore-sipim-ext-01

Abstract

   SIMPLE (SIP for Instant Messaging and Presence Leveraging Extensions)
   is a protocol suite for instant messaging (IM) service, but it is
   inefficient in processing session-mode instant message due to its
   complex signaling processes and heavy header overheads, which makes
   it difficult to meet the QoE (quality of experience) requirement,
   especially in the usage scenario of mobile Internet and other traffic
   sensitive networks.

   This document describes an alternative Session Initiation Protocol
   (SIP) extension for instant messaging service. The extension uses the
   publish-subscribe mode to simplify signaling procedures and
   introduces message user agent (MUA) to publish and receive message,
   and message broker (MB) as an intermediary to exchange messages
   between MUAs. Message is tagged with a topic, and the lightweight
   message format is more suitable for traffic sensitive networks.

Status of this Memo

   This Internet-Draft is submitted to IETF in full conformance with the
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Zhengjp, et al         Expires December 22, 2017                [Page 1]
Internet-Draft                 sipim-ext                   June 21, 2017

   This Internet-Draft will expire on February 08, 2017.

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Table of Contents

   1  Introduction  . . . . . . . . . . . . . . . . . . . . . . . . .  4
   2  Terminology . . . . . . . . . . . . . . . . . . . . . . . . . .  5
   3  Definitions . . . . . . . . . . . . . . . . . . . . . . . . . .  6
   4  Overview  . . . . . . . . . . . . . . . . . . . . . . . . . . .  6
   5  Entities Behavior . . . . . . . . . . . . . . . . . . . . . . .  8
     5.1  MUA . . . . . . . . . . . . . . . . . . . . . . . . . . . .  8
       5.1.1 User Identity(ID) and User Name  . . . . . . . . . . . .  8
       5.1.2  Connection Maintenance  . . . . . . . . . . . . . . . .  9
       5.1.3  Topic Subscription and Message Publication  . . . . . .  9
       5.1.4  Message ID Generation . . . . . . . . . . . . . . . . .  9
       5.1.5  Session Termination . . . . . . . . . . . . . . . . . .  9
     5.2  MB  . . . . . . . . . . . . . . . . . . . . . . . . . . . .  9
       5.2.1  Request Authentication  . . . . . . . . . . . . . . . . 10
       5.2.2  Connection Maintenance  . . . . . . . . . . . . . . . . 10
       5.2.3  Sending Responses . . . . . . . . . . . . . . . . . . . 10
       5.2.4  Processing Offline Messages . . . . . . . . . . . . . . 10
       5.2.5  Other Features  . . . . . . . . . . . . . . . . . . . . 10
   6  Topic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
     6.1  Topic Policy  . . . . . . . . . . . . . . . . . . . . . . . 11
     6.2  Organization of Topic . . . . . . . . . . . . . . . . . . . 11
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