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    • 68. 发明授权
    • Packet interface and method of packetizing information
    • 数据包接口和打包信息的方法
    • US06747977B1
    • 2004-06-08
    • US09437063
    • 1999-11-09
    • Roger SmithSimon Daniel BrueckheimerFai Tsang
    • Roger SmithSimon Daniel BrueckheimerFai Tsang
    • H04L1256
    • H04L12/5601H04L2012/5652H04L2012/5654H04L2012/5664H04L2012/5667H04L2012/5671
    • To obviate inefficient use of bandwidth in a packetised system, such as a broadband ATM domain, the use or amount of header information sent in relation to a channel is restricted by one of two principal mechanisms, as exemplified in FIGS. 3 and 4. First, control information incident to a packet interface (20) is interrogated by a processor (21) to determine (50) packet length requirements. A packet length indicator is then generated (52) for inclusion within a header (44) of a packet. Alternatively, a frame (30) is pre-partitioned (60) into several packets (32-42) having different lengths. An addressed subscriber unit (28) is allocated (64) a particular channel, i.e. at least one particular packet within the frame (30), based on data throughput requirements (62), whereby the location of the packet within the frame inherently identifies the length of the packet. Optionally, the data rate used within that packet may also be identified inherently by the location of the packet within the frame (30).
    • 为了避免诸如宽带ATM域之类的分组化系统中的带宽的低效使用,相对于信道发送的报头信息的使用或数量被两个主要机制之一限制,如图1和2所示。 首先,由处理器(21)询问入站到分组接口(20)的控制信息,以确定(50)分组长度要求。 然后生成分组长度指示符(52)以包括在分组的报头(44)内。 或者,帧(30)被预分区(60)成具有不同长度的数个分组(32-42)。 基于数据吞吐量要求(62),寻址订户单元(28)被分配(64)特定信道,即帧(30)内的至少一个特定分组(62),由此分组在帧内的位置固有地标识 数据包的长度。 可选地,在该分组内使用的数据速率也可以由分组在帧(30)内的位置固有地识别。