Connection set-up between two terminals

摘要

The invention relates to the setting up of a connection between an originating terminal and a terminating terminal. Both terminals may connect via the same access network. The access network accesses a core network through an access gateway. The access gateway transmits and/or receives connection set-up signalling transmitted along a signalling path through at least the core network. Using an information element in the connection set-up signalling, information on media plane access needs of nodes in the signalling path is collected and provided for determining whether a local shortcut of a media path can be established in the access network.

主权项

1. A method of establishing a call between an originating terminal and a terminating terminal that access a core network via the same radio access network (RAN), the method implemented by an access gateway in the core network, the method comprising, during establishment of the call:
receiving a first information element that indicates what level of user plane access core network nodes in a control path of the call require; determining at the access gateway whether to allow a user plane of the call to be locally switched within the RAN; and if the access gateway determines to allow the call's user plane to be locally switched within the RAN, sending from the access gateway to the RAN a second information element that indicates a preference for locally switching the call according to the level of user plane access said core network nodes require.