IMS相关软件的开发
摘要
IMS(IP Multimedia Subsystem)是3GPP提出的支持IP多媒体业务的子系统。它的显著特点是采用了SIP体系,通信与接入方式无关,可以具备多种媒体业务控制功能和承载功能分离、呼叫与会话分离、应用与服务分离、业务与网络分离、以及移动网与因特网业务融合等多种能力。
随着网络以及多媒体技术的不断发展,多媒体业务逐渐在Internet应用中占据主导地位,其中IP语音技术的应用尤为突出。信令技术是发展IP语音技术的关键之一,目前广泛应用的两种信令协议分别是H.323和SIP。SIP协议具有结构简洁、易于扩展和实现,以及适于Internet接入等良好特性,更符合未来网络发展的趋势。因此,研究基于SIP协议的IP语音软终端的设计与实现具有深远的意义和巨大的实用价值。
本文介绍了开发IP语音软终端的关键技术以及SIP的网络体系,并对SIP和H.323标准在各方面进行了比较。本文重点论述了Windows平台上IP语音终端的结构设计,包括音频流的采集、编解码和网络传输方案以及SIP终端的工作流程等;并通过在局域网内进行软终端通信功能测试,验证了本课题所设计的软终端能够使用SIP信令建立连接,可以完成基于IP网络的实时通信功能,并且针对软终端及服务器所出现的bug进行了测试和分析。
IMS (IP Multimedia Subsystem) is a subsystem which support to IP multimedia operation that is brought forward by 3GPP. Its marked characteristic is that it adopt SIP system, correspondence is not related to connecting mode, it has multimedia operation controlling function is separated from carrying capacity, calling is separated from conversation, application is separated from service, operation is separated from network, mobile network is syncretized with internet, etc.
With the development of technology in the network and multimedia area, the business of multimedia communication, especially the Voice IP technology has become a leading element in the Internet applications. The key technology of the development of Voice IP technology is Signaling Technology. At the present time, the most widely used protocols are H.323 and SIP. The Session Initiation Protocol is very concise in the structure, easy to be extended and realized, especially more suitable to access the Internet. All these advantages show that SIP is better than H.323 for Voice IP technology and the future development of network. So, the design and realization of IP Voice Soft-terminal based on SIP will be meaningful practice usage.
This paper introduces the key technologies of developing IP voice soft-terminal, the SIP network architecture and makes comparison between SIP and the H.323 standard. This paper emphasizes the structure design implementation of IP voice soft-terminal based on the Windows platform, including the capture and compression of audio steams, the working thread of IP voice soft-terminal, and so on. And it shows that this soft-terminal can create the connection by SIP Signaling and finish the real-time communication through IP network by a functional testing experiment in local area network. Also tested the function of the soft-terminal and the server.
随着网络以及多媒体技术的不断发展,多媒体业务逐渐在Internet应用中占据主导地位,其中IP语音技术的应用尤为突出。信令技术是发展IP语音技术的关键之一,目前广泛应用的两种信令协议分别是H.323和SIP。SIP协议具有结构简洁、易于扩展和实现,以及适于Internet接入等良好特性,更符合未来网络发展的趋势。因此,研究基于SIP协议的IP语音软终端的设计与实现具有深远的意义和巨大的实用价值。
本文介绍了开发IP语音软终端的关键技术以及SIP的网络体系,并对SIP和H.323标准在各方面进行了比较。本文重点论述了Windows平台上IP语音终端的结构设计,包括音频流的采集、编解码和网络传输方案以及SIP终端的工作流程等;并通过在局域网内进行软终端通信功能测试,验证了本课题所设计的软终端能够使用SIP信令建立连接,可以完成基于IP网络的实时通信功能,并且针对软终端及服务器所出现的bug进行了测试和分析。
IMS (IP Multimedia Subsystem) is a subsystem which support to IP multimedia operation that is brought forward by 3GPP. Its marked characteristic is that it adopt SIP system, correspondence is not related to connecting mode, it has multimedia operation controlling function is separated from carrying capacity, calling is separated from conversation, application is separated from service, operation is separated from network, mobile network is syncretized with internet, etc.
With the development of technology in the network and multimedia area, the business of multimedia communication, especially the Voice IP technology has become a leading element in the Internet applications. The key technology of the development of Voice IP technology is Signaling Technology. At the present time, the most widely used protocols are H.323 and SIP. The Session Initiation Protocol is very concise in the structure, easy to be extended and realized, especially more suitable to access the Internet. All these advantages show that SIP is better than H.323 for Voice IP technology and the future development of network. So, the design and realization of IP Voice Soft-terminal based on SIP will be meaningful practice usage.
This paper introduces the key technologies of developing IP voice soft-terminal, the SIP network architecture and makes comparison between SIP and the H.323 standard. This paper emphasizes the structure design implementation of IP voice soft-terminal based on the Windows platform, including the capture and compression of audio steams, the working thread of IP voice soft-terminal, and so on. And it shows that this soft-terminal can create the connection by SIP Signaling and finish the real-time communication through IP network by a functional testing experiment in local area network. Also tested the function of the soft-terminal and the server.
引文
[1]IETF RFC 3265.Session Initiation Protocol SIP Specific Event Notification[S].
[2]IETF RFC 3261.SIP:Session Initiation Protocol[S].
[3]IETF RFC 3515.The Session Initiation Protocol(SIP)Refer Method[S].
[4]Alan Johnston.Session Initiation Protocol Service Examples[EB/OL].http://www1.ietf.org/mail-archive/working-groups/sip-ping/curre nt/msg04068.html.
[5]Niemi A.Requirements for Limiting the Rate of Event Notifications [EB/OL].http://www1.ietf.org/mail-archive/ietf-announce/current/msg23061.html
[6]Gonzalo Camarillo,Miguel A.Garcia-Martin,3G IP多媒体子系统IMS—融合移动网于因特网,北京:人民邮电出版社2006 2-20
[5]黄永峰,因特网语音通信技术及其应用,北京:人民邮电出版社2002:23-45
[6]糜正现,IP网络电话技术,人民邮电出版社2000年6月
[7]苗兰波,冯志勇,吕廷杰,IP电话网络技术,北京,2001,电子工业出版社,21-25
[8]计育青,Voip迈向主流应用,中国电子报,2002.06
[9]廖铮,杨书卷,国外SIP开发的现状和应用,网络世界,2000.12
[10]李胜利,SIP协议的研究,计算机应用,2001,12(3)23-32
[11]孟旭东,基于SIP的IP会话控制技术,南京邮电学院学报,2000,8(3):20-24
[12]姚旭罡,徐子平,SIP协议在IP电话中的应用,军事通信技术,2003.03
[13]陈志贤,王绍棣,SIP协议中认证注册机制的研究,南京邮电学院学报,2003.09
[14]陈文,SIP构建增值平台,中国计算机报,2002.03
[15]Alan B.Johnsto,深入理解SIP(SIP:Understanding the Session Initiation Protocol),2004
[16]张智江,张云勇,刘韵洁,SIP协议及其应用,电子工业出版社
[17]周海华,边恩炯等,下一代网络SIP原理与应用,机械工业出版社
[18]Gonzalo Camarillo,SIP揭密,人民邮电出版社
[19]SINNREICH John Wiley,SIP互联网通信:VoIP提供与多媒体服务
[20]张海潘编著,软件工程导论,清华大学出版社,1998.1第3版
[21]W.Richard Stevens著,范建华等译,TCP/IP详解卷1:协议,机械工业出版社,2001年
[22]司端峰,韩心慧,龙勤,潘爱民《SIP标准中的核心技术与研究进展》软件学报2005年第16卷第2期
[23]孟旭东,H.323与SIP的比较,电信技术,2001.12
[24]顾京红,SIP终将取代H.323,中国计算机报,2001.10
[25]肖韩越,Visual C++6.0中多线程的应用,北京:电子工业出版社,2000:45-47
[26]苏华英,赖平漳,IP电话技术及其应用,北京:人民邮电出版社,2001:12-45
[2]IETF RFC 3261.SIP:Session Initiation Protocol[S].
[3]IETF RFC 3515.The Session Initiation Protocol(SIP)Refer Method[S].
[4]Alan Johnston.Session Initiation Protocol Service Examples[EB/OL].http://www1.ietf.org/mail-archive/working-groups/sip-ping/curre nt/msg04068.html.
[5]Niemi A.Requirements for Limiting the Rate of Event Notifications [EB/OL].http://www1.ietf.org/mail-archive/ietf-announce/current/msg23061.html
[6]Gonzalo Camarillo,Miguel A.Garcia-Martin,3G IP多媒体子系统IMS—融合移动网于因特网,北京:人民邮电出版社2006 2-20
[5]黄永峰,因特网语音通信技术及其应用,北京:人民邮电出版社2002:23-45
[6]糜正现,IP网络电话技术,人民邮电出版社2000年6月
[7]苗兰波,冯志勇,吕廷杰,IP电话网络技术,北京,2001,电子工业出版社,21-25
[8]计育青,Voip迈向主流应用,中国电子报,2002.06
[9]廖铮,杨书卷,国外SIP开发的现状和应用,网络世界,2000.12
[10]李胜利,SIP协议的研究,计算机应用,2001,12(3)23-32
[11]孟旭东,基于SIP的IP会话控制技术,南京邮电学院学报,2000,8(3):20-24
[12]姚旭罡,徐子平,SIP协议在IP电话中的应用,军事通信技术,2003.03
[13]陈志贤,王绍棣,SIP协议中认证注册机制的研究,南京邮电学院学报,2003.09
[14]陈文,SIP构建增值平台,中国计算机报,2002.03
[15]Alan B.Johnsto,深入理解SIP(SIP:Understanding the Session Initiation Protocol),2004
[16]张智江,张云勇,刘韵洁,SIP协议及其应用,电子工业出版社
[17]周海华,边恩炯等,下一代网络SIP原理与应用,机械工业出版社
[18]Gonzalo Camarillo,SIP揭密,人民邮电出版社
[19]SINNREICH John Wiley,SIP互联网通信:VoIP提供与多媒体服务
[20]张海潘编著,软件工程导论,清华大学出版社,1998.1第3版
[21]W.Richard Stevens著,范建华等译,TCP/IP详解卷1:协议,机械工业出版社,2001年
[22]司端峰,韩心慧,龙勤,潘爱民《SIP标准中的核心技术与研究进展》软件学报2005年第16卷第2期
[23]孟旭东,H.323与SIP的比较,电信技术,2001.12
[24]顾京红,SIP终将取代H.323,中国计算机报,2001.10
[25]肖韩越,Visual C++6.0中多线程的应用,北京:电子工业出版社,2000:45-47
[26]苏华英,赖平漳,IP电话技术及其应用,北京:人民邮电出版社,2001:12-45