Methods and Apparatus in a Telecommunications Network

摘要

A method in a switching node of a circuit-switched telecommunications network comprises the steps of receiving from a packet-switched telecommunications network a request to establish a call towards a mobile station of the circuit-switched telecommunications network, and sending a request message to a location register for an instruction comprising one or more parameters for allowing the continuation of the establishment of the call to the mobile station. Upon receiving the one or more parameters from the location register, at least one of the one or more parameters is used to establish the call towards the mobile station. Furthermore, at least one of the one or more parameters is sent to the packet-switched telecommunications network. The at least one or more parameters sent to the packet-switched telecommunications network relates to the location of the mobile station. Therefore, entities within a packet-switched telecommunications network (e.g. an IMS network) that handle the terminating call for a call that is delivered to circuit-switched telecommunications network access (e.g. GSM), receive location information related to the connected party, i.e. the party (mobile terminal) receiving the call. This information is received transparently in SIP signalling.

主权项

1. A method performed in a location register of a circuit-switched telecommunications network, the method comprising:
receiving, as part of a procedure to establish a call with a mobile terminal, a first request message from a first switching node for an instruction comprising one or more parameters associated with continuing the procedure to establish the call to the mobile terminal; sending at least one second request message to a second switching node for a Mobile Station Roaming Number (MSRN) to be used for establishing the call with the mobile terminal, wherein the at least one second request message includes a request for information associated with a location of the mobile terminal; receiving at least one response message from the second switching node, the at least one response message including the MSRN and information associated with the location of the mobile terminal; and sending the MSRN and the location information associated with the mobile terminal to the first switching center.