Forking interworking

摘要

Communication systems, such as the long term evolution (LTE) of the third generation partnership project (3GPP), may interoperate with other communication systems. Interoperating communication systems may benefit from forking interworking in cases where, for example, one network supports session initiation protocol forking and one network does not. A method may include receiving a session initiation protocol invite request containing a session description protocol offer from a network not supporting forking. The method may also include receiving, in different early dialogs, a plurality of provisional session initiation protocol responses containing session description protocol answers. The method may further include storing information from the answers together with information about a related session information protocol dialog.

主权项

1. A method comprising:
receiving a session initiation protocol invite request containing a session description protocol offer from a network not supporting forking; receiving, in different early dialogues, a plurality of provisional session initiation protocol responses containing session description protocol answers; storing information from the session description protocol answers together with information about session information protocol dialogues respectively related to the session description protocol answers; deriving a session description protocol offer from at least a codec in the information stored from the session description protocol answers; and sending the derived session description protocol offer to the network not supporting forking when a first session description protocol answer and a subsequent session description protocol answer differ from each other with respect to a relevant codec.