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    • 1. 发明申请
    • Method and Apparatus for Determining a Cyclic Redundancy Check (CRC) for a Data Message
    • 用于确定数据消息的循环冗余校验(CRC)的方法和装置
    • US20120192044A1
    • 2012-07-26
    • US13012588
    • 2011-01-24
    • Farhad ShafaiKelvin SpencerJason Coppens
    • Farhad ShafaiKelvin SpencerJason Coppens
    • H03M13/09G06F11/10
    • H03M13/091H04L1/0061
    • A CRC (Cyclic Redundancy Check) code for a data message is created by placing an initial portion of the data message on a bus of width W bits consisting of an integral number N of segments of width S such that the initial portion of the message fills n complete segments, where n≦N. A known bit pattern is placed on any segments preceding a start of the message as determined by a start indicator. A first intermediate CRC code is computed for the n segments of the initial portion by applying the W bits of the bus forming an input word to a CRC full processing circuit using a compensating constant to compensate for any known bit pattern preceding the initial portion of the message. Subsequent portions of the message width W are placed on the bus during subsequent bus cycles, and in each case a new first intermediate CRC code is computed on the W bits of the bus as input words using the current first intermediate CRC code as a seed input. A final portion of the message as determined by an end indicator is placed on the bus. The final portion has a width w bits, where w≦W, and at least completely occupies s segments, where s
    • 通过将数据消息的初始部分放置在由宽度为S的整数N个的宽度W位组成的总线上,使得消息的初始部分填充数据消息的CRC(循环冗余校验)代码 n个完整段,其中n≦̸ N。 已知的位模式被放置在由开始指示符确定的消息开始之前的任何段上。 通过使用补偿常数将形成输入字的总线的W位施加到CRC全处理电路,对初始部分的n个部分计算第一中间CRC码,以补偿在初始部分的初始部分之前的任何已知位模式 信息。 消息宽度W的后续部分在随后的总线周期期间放置在总线上,并且在每种情况下,使用当前的第一中间CRC码作为种子输入在总线的W位上计算新的第一中间CRC码作为输入字 。 由终端指示器确定的消息的最后部分放置在总线上。 最终部分具有宽度w比特,其中w≦̸ W,并且至少完全占据s个段,其中s
    • 3. 发明申请
    • Packet Network Interface Apparatus and Method
    • 分组网络接口设备和方法
    • US20120236878A1
    • 2012-09-20
    • US13047511
    • 2011-03-14
    • Farhad ShafaiJason Coppens
    • Farhad ShafaiJason Coppens
    • H04J3/24
    • H04L47/22H04L49/9068
    • A packet network interface apparatus includes a media access control (MAC) module for constructing a packet for transmission over a packet network and a physical coding sublayer (PCS) module for encoding the packet for transmission over a physical interface. An inter packet gap module located between the MAC module and the PCS module directly transfers data to the PCS module while maintaining a certain inter packet gap by deleting or inserting idle characters. The inter packet gap module has at least one memory module for temporary storage of packet data. The modules preferably operate in a common time domain.
    • 分组网络接口装置包括用于构建用于通过分组网络传输的分组的媒体访问控制(MAC)模块和用于对分组进行编码以在物理接口上传输的物理编码子层(PCS)模块。 位于MAC模块和PCS模块之间的分组间隙模块通过删除或插入空闲字符直接将数据传送到PCS模块,同时保持一定的间隔间隔。 间隔间隔模块具有用于临时存储分组数据的至少一个存储器模块。 模块优选地在公共时域中操作。
    • 4. 发明授权
    • Packet network interface apparatus and method
    • 分组网接口设备及方法
    • US08649398B2
    • 2014-02-11
    • US13047511
    • 2011-03-14
    • Farhad ShafaiJason Coppens
    • Farhad ShafaiJason Coppens
    • H04J3/24H04J3/06H04J3/04G06F15/16
    • H04L47/22H04L49/9068
    • A packet network interface apparatus includes a media access control (MAC) module for constructing a packet for transmission over a packet network and a physical coding sublayer (PCS) module for encoding the packet for transmission over a physical interface. An inter packet gap module located between the MAC module and the PCS module directly transfers data to the PCS module while maintaining a certain inter packet gap by deleting or inserting idle characters. The inter packet gap module has at least one memory module for temporary storage of packet data. The modules preferably operate in a common time domain.
    • 分组网络接口装置包括用于构建用于通过分组网络传输的分组的媒体访问控制(MAC)模块和用于对分组进行编码以在物理接口上传输的物理编码子层(PCS)模块。 位于MAC模块和PCS模块之间的分组间隙模块通过删除或插入空闲字符直接将数据传送到PCS模块,同时保持一定的间隔间隔。 间隔间隔模块具有用于临时存储分组数据的至少一个存储器模块。 模块优选地在公共时域中操作。