Operating and supporting dual mode user equipment
First Claim
1. A method for handling an incoming call to a user equipment by a control node of a cellular telecommunication access network, said method comprising the following steps:
- receiving in the control node an indication of an incoming call to the user equipment, wherein the user equipment is connected to the cellular telecommunication access network,receiving in the control node an indication communicated wirelessly by the user equipment to the cellular telecommunication access network, wherein the indication indicates that the user equipment is connected by a further access network to a device operating according to a session initiation protocol, and wherein the cellular telecommunication access network rather than the further access network initially receives the indication of the incoming call to the user equipment,initiating in the control node the linking in on a route towards the device operating according to a session initiation protocol, of a device that transforms messages sent according to a call control signaling protocol used in the cellular telecommunications access network into messages according to the session initiation protocol,initiating in the control node the linking in on a route towards the device operating according to a session initiation protocol, of a device that transforms user plane transmitted according to a protocol used in the cellular telecommunications access network into user plane transmitted according to an internet protocol and vice versa; and
wherein the control node by performing the first initiating step and the second initiating step provides the incoming call to the user equipment using the device operating according to the session initiation protocol rather than using a wireless radio connection.
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Accused Products
Abstract
A call to a dual mode user equipment is handled by using a further access network from cellular telecommunications access network. An indication of an incoming call to the user equipment is received in a control node that the device can be reached via a device using session initiation protocol (SIP) via the cellular telecommunication access network. The device using SIP sends messages to a device that transforms messages sent according to call control signaling protocol used in the cellular telecommunications network into messages according to SIP. A route to the SIP device is linked to a device that transforms user plane according to protocol in the cellular telecommunications access network into user plane according to internet protocol and vice versa.
30 Citations
23 Claims
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1. A method for handling an incoming call to a user equipment by a control node of a cellular telecommunication access network, said method comprising the following steps:
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receiving in the control node an indication of an incoming call to the user equipment, wherein the user equipment is connected to the cellular telecommunication access network, receiving in the control node an indication communicated wirelessly by the user equipment to the cellular telecommunication access network, wherein the indication indicates that the user equipment is connected by a further access network to a device operating according to a session initiation protocol, and wherein the cellular telecommunication access network rather than the further access network initially receives the indication of the incoming call to the user equipment, initiating in the control node the linking in on a route towards the device operating according to a session initiation protocol, of a device that transforms messages sent according to a call control signaling protocol used in the cellular telecommunications access network into messages according to the session initiation protocol, initiating in the control node the linking in on a route towards the device operating according to a session initiation protocol, of a device that transforms user plane transmitted according to a protocol used in the cellular telecommunications access network into user plane transmitted according to an internet protocol and vice versa; and wherein the control node by performing the first initiating step and the second initiating step provides the incoming call to the user equipment using the device operating according to the session initiation protocol rather than using a wireless radio connection. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method for operating a user equipment that comprises a first transmission unit for communicating with a cellular telecommunications access network and a second transmission unit for communicating with a further access network the method comprising the steps of:
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attaching to the cellular telecommunications access network, determining that the user equipment is currently located in an area that is covered by the further access network, sending a session initiation protocol message for registering the user equipment at a server of the further access network, receiving a session initiation protocol message confirming that the user equipment has been registered, and sending a message from the user equipment to a control node within the cellular telecommunications access network, the message comprising an indication that the user equipment is connected by the further access network to a device operating according to the session initiation protocol, wherein the user equipment is configured to receive an incoming call from the device operating according to the session initiation protocol rather than receive the incoming call over a wireless radio connection directly from the cellular telecommunications access network which initially received the incoming call.
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13. A control node for a cellular telecommunication access network comprising:
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an input unit, an output unit, and a control unit, the control unit adapted; to receive an indication of an incoming call to a user equipment, wherein the user equipment is connected to the cellular telecommunication access network, to determine, based on an indication communicated wirelessly by the user equipment to the cellular telecommunication access network, that the user equipment is connected by a further access network to a device operating according to a session initiation protocol, and wherein the cellular telecommunication access network rather than the further access network initially receives the indication of the incoming call to the user equipment, to initiate the linking in on a route towards the device operating according to a session initiation protocol, of a device that transforms messages sent according to a call control signaling protocol used in the cellular telecommunications access network into messages according to the session initiation protocol and vice versa, to initiate the linking in on a route towards the device operating according to a session initiation protocol, of a device that transforms user plane transmitted according to a protocol used in the cellular telecommunications access network into user plane transmitted according to an internet protocol and vice versa; and wherein the control node by performing the first initiate operation and the second initiate operation provides the incoming call to the user equipment using the device operating according to the session initiation protocol rather than using a wireless radio connection. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20)
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21. A user equipment comprising:
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a first transmission unit for communicating with a first access network of a telecommunications access network, wherein the first transmission unit is connected to the first access network, a second transmission unit for communicating with a further access network, and a control unit, wherein the control unit is adapted; to receive an indication from the second transmission unit that the user equipment is currently located in an area covered by the further access network, and in response thereto; to initiate the registration of the user equipment at a server of the further access network via the second transmission unit, to receive a confirmation that the registration was successful via the second transmission unit, wherein the second transmission unit is connected to the further access network, and to send an indication wirelessly to the first access network, the indication indicating that the user equipment can be reached via a device operating according to a session initiation protocol which is connected to the further access network, wherein the user equipment is configured to receive an incoming call from the device operating according to the session initiation protocol rather than receive the incoming call over a wireless radio connection directly from the first access network which initially received the incoming call. - View Dependent Claims (22, 23)
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Specification