Method of offloading cyclic redundancy check on portions of a packet
US9680605B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 15, 2015 |
| Grant date | Jun 13, 2017 |
| Priority date | — |
| Expiry date | Aug 5, 2035 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L1/0061
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.