Internet multimedia subsystem (IMS) control over session transfer between communication networks

摘要

In a communication system, a session control server receives a session request for User Equipment (UE) over a first network and exchanges signaling with the UE and a transfer control server to establish a media session. The transfer control server sends an association of the UE and the transfer control server to a translation server. The translation server associates the UE with the transfer control server. The translation server receives a transfer request for the UE from a second network and identifies the transfer control server associated with the UE. The translation server transfers the transfer request for delivery to the transfer control server. The transfer control server exchanges signaling with the second network responsive to the transfer request to transfer the media session for the UE from the first network to the second network.

主权项

1. A method of operating a communication system to transfer a media session for User Equipment (UE) between communication networks, the method comprising:
in a session control server, receiving a session request for the UE over a first one of the communication networks and exchanging first control signaling with the UE and a transfer control server to establish the media session for the UE over the first communication network; in a transfer control server and in response to the first control signaling, transferring an association of the UE and the transfer control server for delivery to a translation server; in the translation server, individually associating the UE with the transfer control server in the data structure responsive to the association from the transfer control server; in the translation server, receiving a transfer request for the UE from a second one of the communication networks and processing the data structure to identify the transfer control server that is associated with the UE and transferring the transfer request for delivery to the transfer control server; and in the transfer control server, exchanging second control signaling with the second communication network responsive to the transfer request to transfer the media session for the UE from the first communication network to the second communication network.