| 摘要 |
The message filter has a first filter has a number of elementary masks that operate on all incident messages having an identifier Mi coded from N bits. Each mask performs a logical AND operation to produce a set of prefiltered messages. A second filter operates on these. The second filter has a number of numeric templates that perform an exclusive OR operation on the prefiltered messages, generating second level prefiltered messages. These second level messages are combined with an OR operation to deliver n messages of acceptance or rejection. Messages are accepted if the result of the last combination is logic zero. Accepted messages are combined with an AND operation to indicate the existence of a message at the node.
|
