In this work, Session Initiation Protocol model is established by using Timed Colored Petri Nets (TCPN). SIP (Session Initiation Protocol) is a protocol developed to assist in providing advanced telephony services acr...In this work, Session Initiation Protocol model is established by using Timed Colored Petri Nets (TCPN). SIP (Session Initiation Protocol) is a protocol developed to assist in providing advanced telephony services across the Internet. The Session Initiation Protocol (SIP) has become the quasi-standard for Voiceover-Internet Protocol (VoIP) communications. SIP is based on a client–server infrastructure in which user agents represent the end-terminals as clients, proxy servers handle SIP message routing between the user agents, and registrar servers store the client’s contact information into a location service. By use of timed color set and useful time attributes in tokens defined in CPN tools, timer and time-related problems of SIP are modeled and analyzed. Timer is an important part for SIP, especially the INVITE transaction.展开更多
为提高基于IP的语音传输(Voice over Internet Protocol,VoIP)音频通信系统的可用性,设计并实现了一款基于会话初始协议(Session Initiation Protocol,SIP)的高可用VoIP音频通信系统。首先,基于虚拟IP技术,建立系统在路由层的高可用框...为提高基于IP的语音传输(Voice over Internet Protocol,VoIP)音频通信系统的可用性,设计并实现了一款基于会话初始协议(Session Initiation Protocol,SIP)的高可用VoIP音频通信系统。首先,基于虚拟IP技术,建立系统在路由层的高可用框架。其次,在SIP协议栈层搭建SIP服务器集群,实现系统在网络音频通信业务层的高可用和负载均衡。最后,使用关系型数据库,成功搭建集群在数据一致性方面的高可用模型。实验结果表明,通过该设计可以有效降低VoIP通信系统的故障停机时间,同时可以提高系统的业务负载能力。展开更多
文摘In this work, Session Initiation Protocol model is established by using Timed Colored Petri Nets (TCPN). SIP (Session Initiation Protocol) is a protocol developed to assist in providing advanced telephony services across the Internet. The Session Initiation Protocol (SIP) has become the quasi-standard for Voiceover-Internet Protocol (VoIP) communications. SIP is based on a client–server infrastructure in which user agents represent the end-terminals as clients, proxy servers handle SIP message routing between the user agents, and registrar servers store the client’s contact information into a location service. By use of timed color set and useful time attributes in tokens defined in CPN tools, timer and time-related problems of SIP are modeled and analyzed. Timer is an important part for SIP, especially the INVITE transaction.
文摘为提高基于IP的语音传输(Voice over Internet Protocol,VoIP)音频通信系统的可用性,设计并实现了一款基于会话初始协议(Session Initiation Protocol,SIP)的高可用VoIP音频通信系统。首先,基于虚拟IP技术,建立系统在路由层的高可用框架。其次,在SIP协议栈层搭建SIP服务器集群,实现系统在网络音频通信业务层的高可用和负载均衡。最后,使用关系型数据库,成功搭建集群在数据一致性方面的高可用模型。实验结果表明,通过该设计可以有效降低VoIP通信系统的故障停机时间,同时可以提高系统的业务负载能力。
