Method for the transmission of signalling data in a network interface unit and in a control unit and corrsponding devices
First Claim
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1. A method for signaling by means of signaling messages between a control unit (MGCF) and an interworking unit (IM-MGW), comprising:
- transmitting of a first H.248 ADD.req message from the control unit (MGCF) to the interworking unit,transmitting of a first H.248 ADD.resp message from the interworking unit to the control unit,transmitting of a second H.248 ADD.req message from the control unit to the interworking unit,transmitting of a second H.248 ADD.resp message from the interworking unit to the control unit,executing of an H.223 Multiplexing Level Negotiation by the interworking unit,transmitting of a first H.248 MOD.req message from the control unit to the interworking unit,transmitting of a first H.248 MOD.resp message from the interworking unit to the control unit,transmitting of a second H.248 MOD.req message from the control unit to the interworking unit, andtransmitting of a second H.248 MOD.resp message from the interworking unit to the control unit.
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Abstract
The embodiments relate to, among other things, a network interface unit (IM-MGW) in which signaling data is separated from useful data by the values of received data. The signaling data is tunneled to a control unit (MGCF). Two different data transmission networks (CS, IMS) can thus be simply combined, in particular, for video telephony.
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Citations
9 Claims
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1. A method for signaling by means of signaling messages between a control unit (MGCF) and an interworking unit (IM-MGW), comprising:
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transmitting of a first H.248 ADD.req message from the control unit (MGCF) to the interworking unit, transmitting of a first H.248 ADD.resp message from the interworking unit to the control unit, transmitting of a second H.248 ADD.req message from the control unit to the interworking unit, transmitting of a second H.248 ADD.resp message from the interworking unit to the control unit, executing of an H.223 Multiplexing Level Negotiation by the interworking unit, transmitting of a first H.248 MOD.req message from the control unit to the interworking unit, transmitting of a first H.248 MOD.resp message from the interworking unit to the control unit, transmitting of a second H.248 MOD.req message from the control unit to the interworking unit, and transmitting of a second H.248 MOD.resp message from the interworking unit to the control unit. - View Dependent Claims (3, 4, 5)
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2. The method as claimed in 1, wherein a bearer connection is set up by the interworking unit (bearer establishment).
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6. A context for a video call, comprising terminations:
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T1;
CS domain (CS bearer (BS30) for H.245 control, voice and video),T2;
Multiplexing (H.245 control, voice, video),T3;
Video with own RTP bearer. - View Dependent Claims (8, 9)
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7. The context as claimed in 6, comprising streams:
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Stream1;
between T1 and T2 with data (H.245 control, voice and video),Stream2;
terminates at T2 with H.245 control information,Stream3;
between T2 and T3 with video data, and
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Specification