Enabling local switching in mobile radio networks

摘要

When a new connection needs to be established in a mobile radio network between the core network and the radio access network to terminate a local circuit switched (CS) call, i.e. a CS call for which another connection has already been established between the core network and the same radio access network, the core network includes an optional information element containing “Other party information” in the messages that establish the new connection, allowing the radio access network to correlate the two connections, put them in direct communication and exclude the core network from the user plane data flow.

主权项

1. A method for local switching of circuit switched calls in mobile radio networks, comprising:
receiving, by a base station controller or a base station system from a switching center, a connection message, the connection message including other party information in an optional information element, the other party information including a connection identifier; and in response to detection of the other party information including the connection identifier:
establishing a new connection between a core network and a radio access network;terminating a local circuit switched call, for which another connection has already been established between the core network and the radio access network, to enable direct communication that excludes the core network from user plane data flow; andcorrelating the new connection and the other connection, for which the another connection has already been established with the core network, by the radio access network based on the other party information.