- 专利标题： Method of offloading cyclic redundancy check on portions of a packet
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申请号： US14713632申请日： 2015-05-15
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公开(公告)号： US09680605B2公开(公告)日： 2017-06-13
- 发明人: Eric Englert , Bernard Marchand , John F. Pillar
- 申请人： Eric Englert , Bernard Marchand , John F. Pillar
- 申请人地址： US TX Austin
- 专利权人： NXP USA, Inc.
- 当前专利权人： NXP USA, Inc.
- 当前专利权人地址： US TX Austin
- 主分类号： H03M13/00
- IPC分类号： H03M13/00 ; H04L1/00
摘要：
A method and apparatus are provided for computing a CRC value for a data stream packet with a modified portion and an unmodified portion extending a distance to the end of the data stream packet by computing a first CRC value from the unmodified portion, computing a second CRC value from the modified portion, adjusting the second CRC value based on a shift length equal to the distance of the unmodified portion to compute a perspective shifted second CRC value by using a fixed number of distance lookup table operations, and generating an updated CRC value from the first CRC value and perspective shifted second CRC value, thereby avoiding recalculating a complete CRC value based on an entirety of the data stream packet.
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