Patent ID: 9288238
Filing Date: 2016-03-15
CPC Classification: H04L,H04M,H04W

Claim Text:
1. A call session control function server comprising: a memory to store instructions; and a controller coupled to the memory, wherein responsive to executing the instructions, the controller performs operations comprising: receiving a first message via a communication network from originating equipment of a first subscriber of the communication network, the first message regarding origination of a call from the first subscriber to a mobile communication device of a second subscriber of the communication network; sending a second message to a gateway mobile switching center communicatively coupled with the communication network, wherein the gateway mobile switching center comprises a session initiation protocol proxy server, and wherein the second message comprising a first session descriptor protocol relating to a port of the communication network connecting to the originating equipment, whereby the gateway mobile switching center comprises a node on a signaling path for the call; receiving a third message directly from the gateway mobile switching center, the third message comprising a second session descriptor protocol relating to a serving mobile switching center communicatively coupled with the mobile communication device, to facilitate a bearer path between the communication network and the serving mobile switching center, wherein the gateway mobile switching center is not utilized in the bearer path as a result of the communication network receiving the second session descriptor protocol of the serving mobile switching center instead of receiving a third session descriptor protocol of the gateway mobile switching center.