软交换环境中IP Phone Info Server的设计与实现
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摘要
随着网络技术的飞速发展、网络市场的开放以及用户对多种业务需求的与日俱增，出现了“三网融合”的潮流，即原先独立设计运营的传统电信网、计算机网(主要指因特网)和有线电视网正通过各种方式趋向于相互渗透和融合。以三大业务来划分市场和行业的时代已告结束，三网融合已成为未来信息业发展的重要趋势。
在这一趋势下，构建一个以光为传输、IP为核心、多种接入并存、能提供视频、话音、数据综合业务的网络的观点为学术界和产业界普遍认可。在电信方面，提出了以软交换为核心的技术来实现在一个统一的IP网上实现电信业务思路。该思路具有统一开放的分组交换网络平台、分布式的网络体系结构、控制与连接分离、业务驱动等特点，不但可以满足现有的电信业务，而且在体系结构上就为新业务的产生提供了足够的支持，其中可以通过在软交换体系中构建应用服务器来提供新的业务。
本项目开发的IP Phone Info Server就是为软交换环境中的IP电话提供信息服务的一种应用服务器。本文通过对软交换环境的介绍来说明应用服务器和其它组件的关系。并通对系统设计和软件实现中的一些思路、方法和模式进行探讨，从而总结出一些在软交换环境中开发应用服务器的经验。
With the development of the network technology and the opening of the network services market, the demand for the multi-service is great than ever. The trend of the convergence towards an IP-based core network is obviously.
A multi-service network consists of the optical infrastructure, IP core and multi-access. The idea of building this kind of network has accepted by almost all the people in the world. In the telecommunication field, there is a common idea of deploying the telecommunication service on a next generation network with an IP core using the Softswitch technique. The framework of the Softswitch shares the idea of open standard, distributed structure and service driving. In this framework, new services can be provided with building application servers.
The IP Phone Info Server is a kind of application server to provide an information service for the IP Phone in the Softswitch network. The way of how to develop an application server in the Softswitch network is discussed in this paper.
在这一趋势下，构建一个以光为传输、IP为核心、多种接入并存、能提供视频、话音、数据综合业务的网络的观点为学术界和产业界普遍认可。在电信方面，提出了以软交换为核心的技术来实现在一个统一的IP网上实现电信业务思路。该思路具有统一开放的分组交换网络平台、分布式的网络体系结构、控制与连接分离、业务驱动等特点，不但可以满足现有的电信业务，而且在体系结构上就为新业务的产生提供了足够的支持，其中可以通过在软交换体系中构建应用服务器来提供新的业务。
本项目开发的IP Phone Info Server就是为软交换环境中的IP电话提供信息服务的一种应用服务器。本文通过对软交换环境的介绍来说明应用服务器和其它组件的关系。并通对系统设计和软件实现中的一些思路、方法和模式进行探讨，从而总结出一些在软交换环境中开发应用服务器的经验。
With the development of the network technology and the opening of the network services market, the demand for the multi-service is great than ever. The trend of the convergence towards an IP-based core network is obviously.
A multi-service network consists of the optical infrastructure, IP core and multi-access. The idea of building this kind of network has accepted by almost all the people in the world. In the telecommunication field, there is a common idea of deploying the telecommunication service on a next generation network with an IP core using the Softswitch technique. The framework of the Softswitch shares the idea of open standard, distributed structure and service driving. In this framework, new services can be provided with building application servers.
The IP Phone Info Server is a kind of application server to provide an information service for the IP Phone in the Softswitch network. The way of how to develop an application server in the Softswitch network is discussed in this paper.
引文
[1] IETF, RFC 821 SIMPLE MAIL TRANSFER PROTOCOL, August 1982
[2] IETF, RFC1939 Post Office Protocol-Version 3, May 1996
[3] IETF, RFC 2543 SIP: Session Initiation Protocol, March 1999
[4] IETF, RFC 2705 Media Gateway Control Protocol (MGCP), October 1999
[5] IETF, RFC 3015 Megaco Protocol Version 1.0, November 2000
[6] IETF, RFC2976 The SIP INFO Method, October 2000
[7] ITU, H. 323 Packet-based multimedia communications systems, November 2000
[8] H. Schulzrinne, "A comprehensive multimedia control architecture for the Internet," in Proc. International Workshop on Network and Operating System Support for Digital Audio and Video (NOSSDAV), (St. Louis, Missouri), May 1997.
[9] ISC Reference Architecture, V 1.2, International Softswitch Consortium June 2002
[10] IPCell Technologies, Inc. Call Processing Digit Analysis & Routing, March 24, 2000
[11] IPCell Technologies, Inc. Call Agent and Feature Server Architecture, March 24, 2000
[12] IPCell Technologies, Inter Call Agent Protocol (ICAP) Specification 1.0, Inc. March 24, 2000
[13] Cisco Systems, Inc., Cisco BTS 10200 System Description,
[14] Cisco Systems, Inc,.LDAP Search Programming Guide,
[15] Cisco Systems, Inc.,CTI Applications Architecture and Design for CallManager 3.1
[16] Cisco Systems, Inc.,AXL API Programming Guide,
[17] 朱国东 刘云 铁通发展软交换思路与实践的初探，《通信市场》2002．8
[18] 李晓明 关于新一代网络NGN关键技术问题的探讨，《数据通信》2002．3
[19] 张跃 段云峰 宋俊德 软交换中开放式业务平台的设计，《电信技术》
[20] 短消息网关系统接口协议(SGIP)版本1．2，中国联通公司
[21] 点对点短消息网间互通协议，中国联通公司
[22] 中国联通综合智能业务平台技术体制，中国联通公司
[23] Paul J．Perrone，et al，J2EE构建企业系统 清华大学出版社 2001．6
[24] 扬昆，IP电话及其增值业务技术 人民邮电出版社 2002．1
[25] Rajkumar Buyya高性能集群计算：结构与系统电子工业出版社 2001．6
[2] IETF, RFC1939 Post Office Protocol-Version 3, May 1996
[3] IETF, RFC 2543 SIP: Session Initiation Protocol, March 1999
[4] IETF, RFC 2705 Media Gateway Control Protocol (MGCP), October 1999
[5] IETF, RFC 3015 Megaco Protocol Version 1.0, November 2000
[6] IETF, RFC2976 The SIP INFO Method, October 2000
[7] ITU, H. 323 Packet-based multimedia communications systems, November 2000
[8] H. Schulzrinne, "A comprehensive multimedia control architecture for the Internet," in Proc. International Workshop on Network and Operating System Support for Digital Audio and Video (NOSSDAV), (St. Louis, Missouri), May 1997.
[9] ISC Reference Architecture, V 1.2, International Softswitch Consortium June 2002
[10] IPCell Technologies, Inc. Call Processing Digit Analysis & Routing, March 24, 2000
[11] IPCell Technologies, Inc. Call Agent and Feature Server Architecture, March 24, 2000
[12] IPCell Technologies, Inter Call Agent Protocol (ICAP) Specification 1.0, Inc. March 24, 2000
[13] Cisco Systems, Inc., Cisco BTS 10200 System Description,
[14] Cisco Systems, Inc,.LDAP Search Programming Guide,
[15] Cisco Systems, Inc.,CTI Applications Architecture and Design for CallManager 3.1
[16] Cisco Systems, Inc.,AXL API Programming Guide,
[17] 朱国东 刘云 铁通发展软交换思路与实践的初探，《通信市场》2002．8
[18] 李晓明 关于新一代网络NGN关键技术问题的探讨，《数据通信》2002．3
[19] 张跃 段云峰 宋俊德 软交换中开放式业务平台的设计，《电信技术》
[20] 短消息网关系统接口协议(SGIP)版本1．2，中国联通公司
[21] 点对点短消息网间互通协议，中国联通公司
[22] 中国联通综合智能业务平台技术体制，中国联通公司
[23] Paul J．Perrone，et al，J2EE构建企业系统 清华大学出版社 2001．6
[24] 扬昆，IP电话及其增值业务技术 人民邮电出版社 2002．1
[25] Rajkumar Buyya高性能集群计算：结构与系统电子工业出版社 2001．6