| 摘要 |
The invention provides a method and system for fault-tolerant communication. It utilizes three wide area networks, including the cell phone network, the internet and the telephone network (PSTN). The method and system monitors the wide-area networks and sends warning messages if they cannot be accessed from a local site. Primary failure conditions relate to the access and use of the three wide-area networks. Secondary failure conditions include power outages. The possible fault conditions include: ‘telephone out’, ‘internet out’, ‘wireless radio out’, ‘power out’. If these failure conditions are detected, the method and system alerts the user and redirects voice, text message, and data traffic via a detour over a different wide-area network in order to avoid that failure. A method and system has been disclosed that routs information over one of multiple networks in a fault-tolerant manner. In case of network failure, detour routers allow the start-detour routers to switch the information flow over another network to an end-detour router, where the information flow is switched back to the originally-intended network. Cell radios are utilized, as well as telephones and the internet to provide redundancy and fail-over under ‘telephone out’, ‘internet out’, ‘cell phone out’ conditions. The method has particular strengths in supporting communication even with dynamically assigned addresses, thus assuring that remote users receive monitoring and alarm information in a timely manner.
|
