Bearer control mode (NW-only or user-only) handling in intersystem handover
A method, a gateway node, a policy control node and a infrastructure network for handling a handover of a User Equipment communicating wirelessly with the infrastructure network. A first gateway node receives handover information indicative of a handover of the user equipment between two radio access networks the first gateway node determining a bearer control mode on the basis of the handover information the first gateway node transmitting control information determined on the basis of the bearer control mode to a policy control node the first gateway node controlling the bearer binding on the basis of the bearer control mode.
1. A method for handling handover of a user equipment communicating wirelessly with an infrastructure network, comprising the steps of:
a first gateway node receiving handover information indicative of a handover of the user equipment from a first radio access network to a second radio access network,
the first gateway node determining a bearer control mode supported by the second radio access network on a basis of the handover information,
the first gateway node transmitting control information determined on a basis of the bearer control mode to a policy control node, and
the first gateway node controlling a bearer binding on the basis of the bearer control mode.
2. The method according to claim 1 comprising the step of:
a mobility control node determining and transmitting the handover information determined on a basis of the handover of the user equipment.
3. The method according to claim 1 wherein the control information comprises a policy request.
4. The method according to claim 3 wherein the policy request comprises policy rules.
5. The method according to claim 3 wherein the policy control node transmits a policy answer to the first gateway node in response to the policy request.
6. The method according to claim 5 wherein the policy answer comprises policy rules.
7. The method according to claim 1 wherein the user equipment is handed over from an Evolved Universal Terrestrial Radio Access Network (E-UTRAN) to a GSM EDGE Radio Access Network (GERAN) or a UMTS Terrestrial Radio Access Network (UTRAN).
8. The method according to claim 7 wherein the step of determining and transmitting the control information comprises the step of:
the first gateway node detecting that a mobility control node is working in the user equipment initiated Bearer Control Mode (BCM) procedure.
9. The method according to claim 1 wherein the user equipment is handed over from a GSM EDGE Radio Access Network (GERAN) or a UMTS Terrestrial Radio Access Network (UTRAN) to a GERAN or a UTRAN or an Evolved Universal Terrestrial Radio Access Network (E-UTRAN).
10. The method according to claim 9 wherein the step of determining and transmitting the control information comprises the steps of:
the first gateway node detecting that a mobility control node is working in the network initiated Bearer Control Mode (BCM) procedure.
11. A gateway node for handling handover of a user equipment communicating wirelessly with an infrastructure network, the gateway node comprising:
a processor;
a memory unit having instructions stored therein that, when executed by the processor, cause the gateway node to:
receive handover information indicative of a handover of the user equipment from a first radio access network to a second radio access network,
determine a bearer control mode supported by the second radio access network on a basis of the handover information,
transmit control information determined on a basis of the bearer control mode to a policy control node, and
control a bearer binding on the basis of the bearer control mode.
12. A policy control node being adapted to handle handover of a user equipment communicating wirelessly with an infrastructure network, the policy control node comprising:
a processor;
a memory unit having instructions stored therein that, when executed by the processor, cause the gateway node to:
receive control information from a gateway node, the control information being determined on a basis of a bearer control mode supported by a first radio access network,
wherein the bearer control mode is determined on a basis of handover information received by the gateway node and indicating a handover of the user equipment from a second radio access network to the first radio access network.
13. An infrastructure network being adapted to handle handover of a user equipment communicating wirelessly with an infrastructure network, the network comprising at least one gateway node and at least one policy control node, the infrastructure network being adapted to:
receive in a first gateway node handover information indicative of a handover of the user equipment from a first radio access network to a second radio access network,
determine in the first gateway node a bearer control mode supported by the second radio access network on a basis of the handover information,
transmit from the first gateway node control information determined on a basis of the bearer control mode to the at least one policy control node, and
control in the first gateway node a bearer binding on the basis of the bearer control mode.