COMMUNICATION METHOD AND SYSTEM

摘要

The present invention increases reliability of communication over a non-deterministic communication channel, and is particularly suited for inter-substation teleprotection in electric power systems. A communication channel is being monitored based on regular network traffic, i.e. by evaluating messages or data packets carrying real-time operational data as a payload. A permanent determination of a channel quality, including appropriate alarming in case the channel quality is found insufficient, is based on an evaluation, at a receiving node, of data packets continually transmitted by a sending node. These continually or repeatedly transmitted data packets may comprise identical payloads reflecting current states rather than state changes as operational data.