| 摘要 |
A method for detecting collisions between digital messages transmitted on a common cable communication system is disclosed. A transmitting station computes a cylic redundancy checking (CRC) code for the transmitted message, and stores the value of the code after N bits have been sent. N bits corresponds to the number of bits transmitted during the "collision window" of the particular system. The transmitting station monitors the receive channel and computes a CRC value for N bits of the received message. If the CRC value calculated for the received message does not match the stored CRC value for the transmitted message, a collision is assumed. If no message is received by the transmitting station after the collision window has elapsed, a collision is also assumed.
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