Apparatus and method for call handover between packet network system and circuit network system
AssigneesSamsung Electronics Co., Ltd., Industry-Academic Cooperation Foundation, Yonsei University
InventorsEun-Hui Bae, Sung-Ho Choi, Jai-Yong Lee, Hyun-Duk Jung, Kyung-Min Kim
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Abstract
A method and apparatus for performing handover on a voice call between a packet network system and a circuit network system is provided. Considering a communication environment where a UE cannot simultaneously use radio resources of both the next generation mobile communication system (LTE) and the legacy mobile communication system (e.g., GSM/WCDMA), the present invention proposes an SCSE for performing signal translation between the packet switched network and the circuit switched network and anchoring a voice call in the application level, and supports a continuous voice call using the SCSE.
Claims22
A method for performing handover between a packet switched call based on a packet switched network and a circuit switched call based on a circuit switched network, the method comprising:
- receiving, by a service continuity supporting entity (SCSE), a handover request message from a user equipment (UE) over the packet switched network;
- when the handover request message is a protocol message based on the packet switched network, checking, by the SCSE, if the handover-requesting UE is a UE that has been anchored in the SCSE;
- when the handover-requesting UE is not the UE that has been anchored in the SCSE, sending a handover reject message from the SCSE to the handover-requesting UE;
- and
- when the handover-requesting UE is the UE that has been anchored in the SCSE, translating, by the SCSE, the protocol message into a circuit message based on the circuit switched network, and then delivering the circuit message to the circuit switched network.
An apparatus for performing handover between a packet switched call and a circuit switched call, the apparatus comprising:
- a packet switched network;
- a circuit switched network;
- and
- a service continuity supporting entity (SCSE), connected between the packet switched network and the circuit switched network, configured to receive a handover request message from a user equipment (UE) over the packet switched network, configured to check if the handover-requesting UE is a UE that has been anchored in the SCSE when the handover request message is a protocol message based on the packet switched network, configured to send a handover reject message to the handover-requesting UE when the handover-requesting UE is not the UE that has been anchored in the SCSE, and when the handover-requesting UE is the UE that has been anchored in the SCSE, configured to translate the protocol message into a circuit message based on the circuit switched network, and configured to deliver the circuit message to the circuit switched network.
A system for performing handover between a packet switched call based on a packet switched network and a circuit switched call based on a circuit switched network, the system comprising:
- a user equipment (UE), connected to a particular cell of the packet switched network, configured to perform measurement on at least one cell based on the circuit switched network neighboring the particular cell;
- the packet switched network including, an enhanced node B (eNB) of the particular cell, configured to check a measurement report received from the UE to determine whether to perform handover, and a mobile management entity configured to check information on a target network through a handover request message transmitted from the eNB, and configured to transmit a protocol-based handover request message to a service continuity supporting entity (SCSE);
- the SCSE configured to receive the protocol-based handover request message, configured to check if the target network is a circuit switched network, configured to check if the UE has been anchored in the SCSE, sending a handover reject message to the UE when the UE has not been anchored in the SCSE, and when the UE has been anchored in the SCSE, and configured to translate the protocol-based handover request message into a circuit-based handover request message;
- and
- the circuit switched network including a mobile service cg enter (MSC) configured to receive a circuit-based handover request message delivered from the SCSE, configured to assign a particular cell of the circuit switched network, and configured to set up a radio bearer to the assigned particular cell, completing handover.
Dependencies are inferred from the claim text.