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    • 5. 发明申请
    • PROTOCOL AND METHOD OF VIA FIELD COMPRESSION IN SESSION INITIATION PROTOCOL SIGNALING FOR 3G WIRELESS NETWORKS
    • 3G无线网络会议启动协议信令中的现场压缩协议及方法
    • WO2008030499A2
    • 2008-03-13
    • PCT/US2007019409
    • 2007-09-05
    • KYOCERA WIRELESS CORPSURI ATULJUNEJA ANUPAMKHARIA YASH
    • SURI ATULJUNEJA ANUPAMKHARIA YASH
    • H04L69/04H04L29/06027H04L65/1006H04L69/22
    • Session initiation protocol "SIP" signaling for 3G wireless networks is provided by using compression in the VIA field to reduce the signaling overhead in SIP messages. Methods of compression include eliminating redundant address information found in each intermediate address along the path traveled by the message and tokenizing certain elements of the header and using the tokens in the VIA header in place of the raw strings. A network device receives (250) an SIP message and examines the VIA field in the header information of the SIP message to identify (260) the domain from which the SIP message was sent. If the domain is not the same (270) as the current domain, then the network device appends (280) the current domain in the VIA field and sends the message along its path to the destination node. If the domain is the same (270) as the current domain, then the network device compresses (290) the domain information and appends (300) the compressed domain information in the VIA field and sends the message along its path to the destination node.
    • 通过在VIA字段中使用压缩来提供3G无线网络的会话发起协议“SIP”信令,以减少SIP消息中的信令开销。 压缩方法包括消除沿着由消息行进的路径的每个中间地址中发现的冗余地址信息,并标记头部的某些元素并使用VIA头中的令牌来代替原始字符串。 网络设备接收(250)SIP消息,并检查SIP消息的报头信息中的VIA字段,以识别(260)发送SIP消息的域。 如果域与当前域不相同(270),则网络设备将当前域追加到(280)VIA字段中,并将该消息沿其路径发送到目的地节点。 如果域与当前域相同(270),则网络设备压缩(290)域信息,并在(VIA)字段中附加(300)压缩域信息,并将消息沿其路径发送到目的地节点。