Using a common media gateway node and a coordinated codec by an originating and a terminating call control node

摘要

A method for a call control node (MSC-S2) for setting up transmission of voice data from a calling party (BSC1) towards a called party (BSC2) via at least one media gateway node (MGW-1, MGW-2) is provided, said call control node (MSC-S2) acting as a terminating call control node being adapted for communicating with the at least one media gateway node (MGW-1) and with an originating call control node (MSC-S1), the method comprising receiving first information from the originating call control node (MSC-S1) indicative of at least one media gateway node (MGW-1, MGW-2) usable for transmitting the voice data, receiving second information from the originating call control node (MSC-S1) indicative of a codec (PCM) to be used from the calling party (BSC1) towards the at least one media gateway node (MGW-1, MGW-2) usable for transmitting the voice data, determining whether the voice data is transmittable by the at least one media gateway node (MGW-1, MGW-2) towards the called party (BSC2) encoded by said codec (PCM)1 determining whether a common media gateway node (MGW-1) is usable by both the originating call control node (MSC-S1) and the terminating call control node (MSC-S2), sending first backward information to the originating call control node (MSC-S1) indicative of the said codec (PCM), and sending second backward information to the originating call control node (MSC-S1) indicative of the common media gateway node (MGW-1).

主权项

1. A method for a call control node for setting up transmission of voice data from a calling party towards a called party via at least a first media gateway node, the call control node acting as a terminating call control node adapted for communicating with the first media gateway node and with an originating call control node, the method comprising:
receiving first information from the originating call control node indicative of the first media gateway node usable for transmitting the voice data; receiving second information from the originating call control node indicative of a codec to be used from the calling party towards the first media gateway node usable for transmitting the voice data; determining whether the voice data is transmittable by the first media gateway node towards the called party encoded by the codec; determining whether the first media gateway is usable as a common media gateway node by both the originating call control node and the terminating call control node; sending first backward information to the originating call control node indicative of the codec; sending second backward information to the originating call control node indicative of the common media gateway node.