| 发明名称 |
A METHOD OF DETERMINING THE PACKET CHECK-SUM OF THE MODIFIED DATA |
| 摘要 |
<p>This invention discloses a method of method of determining the packet check-sum of the modified data, the method includes: (A) Add all the data before being modified corresponding to the related modified data segments in the packet, and obtain a sum value x; (B) Add all the modified data corresponding to the related modified data segments in the packet, and obtain a sum value y; (C) Obtain the check-sum Z of the packet before being modified; (D) Obtain the check-sum after being modified based on the value of the equation: (M<<k)+(Z-M)-x+y, wherein, (M<<k) means that moving left the M for k bits, k is the number of the bits of the data segments, the M is the number of the related modified data segments. The usage of this invention can simplify the priority method of determining the packet check-sum of the modified data, and it can save the resource of the processor, improve the efficiency of working.</p> |
| 申请公布号 |
WO2005064880(A1) |
申请公布日期 |
2005.07.14 |
| 申请号 |
WO2004CN01347 |
申请日期 |
2004.11.24 |
| 申请人 |
HUAWEI TECHNOLOGIES CO., LTD.;XIONG, LIQUN;WANG, LIANG;GU, JIANGCHUN;ZOU, YONG |
发明人 |
XIONG, LIQUN;WANG, LIANG;GU, JIANGCHUN;ZOU, YONG |
| 分类号 |
H04L1/00;H04L29/06;(IPC1-7):H04L29/06 |
主分类号 |
H04L1/00 |
| 代理机构 |
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