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    • 5. 发明申请
    • Dynamic Header Creation and Flow Control for A Programmable Communications Processor, and Applications Thereof
    • 可编程通信处理器的动态头创建和流控制及其应用
    • US20080159140A1
    • 2008-07-03
    • US11966843
    • 2007-12-28
    • Michael R. ROBINSONJoel I. DANZIGThomas L. JOHNSON
    • Michael R. ROBINSONJoel I. DANZIGThomas L. JOHNSON
    • H04L12/26
    • H04L47/36H04L12/2801H04L47/10H04L47/21H04L47/29H04L49/90H04L49/901H04L49/9042H04L69/22
    • A method, system and computer program product for creating dynamic custom headers and for controlling flow rate of Downstream External Physical layer Interface (DEPI) packets are described herein. The method comprises concatenating or fragmenting a packet descriptor of a DEPU packet based on one or more of associated packet size, maximum transmission unit, packet type, channel configuration information and flow control mode. The method further comprises creating a header for the packet based on data in a programmable header template and storing the header in a header buffer, determining whether to transmit the packet based on one of a flow meter or a maximum transmission unit size and transmitting the packet by sending the packet descriptor to an output direct memory access (DMA) controller. A flow meter flow control mode determines if a packet is to be transmitted based on packet size, bucket size, a low threshold and a high threshold. A maximum transmission unit flow control mode determines if a packet is to transmitted based on packet size and a maximum transmission unit size. The header can be customized for Packet Streaming Protocol (PSP) mode or Moving Picture Experts Group Transport Stream (MPT) mode and includes dynamic customizable fields such as User Datagram Protocol (UDP) port identification, flow identification and session identification.
    • 本文描述了用于创建动态定制头部和用于控制下游外部物理层接口(DEPI)分组的流量的方法,系统和计算机程序产品。 该方法包括基于相关联的分组大小,最大传输单元,分组类型,信道配置信息和流控制模式中的一个或多个来连接或分段DEPU分组的分组描述符。 该方法还包括基于可编程头部模板中的数据创建分组头部,并将头部存储在头部缓冲器中,基于流量计或最大传输单元大小之一确定是否发送分组,并发送分组 通过将分组描述符发送到输出直接存储器访问(DMA)控制器。 流量计流量控制模式基于分组大小,桶大小,低阈值和高阈值来确定是否要发送分组。 最大传输单元流量控制模式基于分组大小和最大传输单元大小确定是否要发送分组。 可以为分组流协议(PSP)模式或运动图像专家组传输流(MPT)模式定制报头,并且包括诸如用户数据报协议(UDP)端口标识,流识别和会话识别之类的动态可定制字段。