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    • 12. 发明申请
    • BACKWARD LOOKING ROBUST HEADER COMPRESSION RECEIVER
    • 后视镜看起来坚固的头部压缩接收器
    • US20120113993A1
    • 2012-05-10
    • US13382612
    • 2010-06-18
    • Avinash SridharDavid Brian AndersonDavid Anthony Campana
    • Avinash SridharDavid Brian AndersonDavid Anthony Campana
    • H04L29/02
    • H04L69/22H04L65/604H04L65/607H04L65/608H04L69/04H04L69/28
    • Robust Header Compression (ROHC) offers a way to compress packet header information for more efficient transmission of data. The compression is achieved through various confidence modes set up by the transmitter and the receiver. The Initialization and Refresh state (IR) is the first state of the compressor. This provides a complete, uncompressed context of the data that is being transmitted. In typically operation, the ROHC compressor will periodically transmit IR packets providing context information allowing the ROHC decompressor to decompress one or more packets following the IR packet. However, under certain conditions such as decompressor start-up, it is possible for the decompressor to miss an IR packet. Exemplary methods and apparatus are described in which a decompressor uses a later-received IR packet to decompress earlier packets for which the decompressor had not received context information.
    • 强大的头压缩(ROHC)提供了一种压缩数据包头信息以更有效地传输数据的方法。 通过由发射机和接收机设置的各种置信模式实现压缩。 初始化和刷新状态(IR)是压缩机的第一个状态。 这提供了正在传输的数据的完整的,未压缩的上下文。 在典型的操作中,ROHC压缩器将周期性地发送提供上下文信息的IR分组,允许ROHC解压缩器对IR分组之后的一个或多个分组进行解压缩。 然而,在诸如解压缩器启动的某些条件下,解压缩器可能错过IR分组。 描述了示例性方法和装置,其中解压缩器使用稍后接收的IR分组来解压缩解压缩器尚未接收到上下文信息的先前分组。