The present invention provides a communication network comprising a host network, a plurality of base stations, at least a mobile host capable of establishing links to the base stations, and a hierarchy-network of plural routers which are improved in transferring performances for ensuring continuous operations with a reduced load without packet loss.
* 2002/0181,437 Data link transmission control methods, mobile communication systems, data link transmission control apparatus, base stations, mobile stations, mobile station control programs, and computer-readable recording media
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