In a bearer-independent core network, the switching and transport of the bearer streams is separated from the processing of call sessions that control the bearer streams. The switching and transport of the bearer streams is executed by media gateways and packet switches in the switching and transport...http://www.google.fr/patents/US7532568?utm_source=gb-gplus-shareBrevet US7532568 - Geographic redundancy for call servers in a cellular system based on a bearer-independent core network
Geographic redundancy for call servers in a cellular system based on a ...