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    • 2. 发明申请
    • METHOD AND APPARATUS FOR SELECTIVE ROHC HEADER COMPRESSION FOR SIP
    • 用于SIP的选择性ROHC头压缩的方法和装置
    • WO2010002767A1
    • 2010-01-07
    • PCT/US2009/049017
    • 2009-06-29
    • MOTOROLA, INC.TANG, Dah-lain, AlmonDAI, HuiXU, Yingchun
    • TANG, Dah-lain, AlmonDAI, HuiXU, Yingchun
    • H04L29/06
    • H04L69/04H04L65/1006H04L65/608H04W28/06
    • A method and system for providing header compression guidance to mobile devices (133) initiating certain applications and/or protocols. A selective header compression (SHC) utility utilizes a session initiation protocol (SIP) message to provide robust header compression (ROHC) guidance to a mobile device initiating a call involving selected (SIP related) applications, protocols and/or service options. In addition, ROHC guidance allows the mobile device to appropriately select the source and/or destination port (depending on packet origination) for data flows requiring ROHC. ROHC guidance may recommend that the mobile device request ROHC for VoIP flows, but not for video flows. Furthermore, the guidance may specify the range of real-time protocol (RTP) ports at which ROHC is applied. For example, within a specified range of RTP ports, ROHC may be applied to data transmissions via even port numbers but prevented for real-time transport control protocol (RTCP) flows via odd port numbers.
    • 一种用于向启动某些应用和/或协议的移动设备(133)提供报头压缩指导的方法和系统。 选择性报头压缩(SHC)实用程序利用会话发起协议(SIP)消息来向发起涉及所选(SIP相关)应用,协议和/或服务选项的呼叫的移动设备提供鲁棒的报头压缩(ROHC)指导。 另外,对于需要ROHC的数据流,ROHC指导允许移动设备适当地选择源和/或目标端口(取决于分组发起)。 ROHC指导可能建议移动设备请求ROHC进行VoIP流量,但不适用于视频流。 此外,该指导可以指定应用ROHC的实时协议(RTP)端口的范围。 例如,在RTP端口的指定范围内,ROHC可以通过偶数端口号应用于数据传输,但是通过奇数端口号阻止实时传输控制协议(RTCP)流。