User equipment, call continuity application server, and network handover method
First Claim
1. A method for a user equipment (UE) to perform network handover, comprising:
- sending, by the UE, a network handover request carrying session description information of the UE to a call continuity application server in a target network;
performing, by the UE that initiates a handover, a session negotiation on call continuity handover in a call-hold state with an Other End Point (OEP) according to the session description information via the call continuity application server; and
handing over a call corresponding to the network handover request to the target network after the session negotiation succeeds; and
wherein the session description information includes call-hold information of the UE that initiates the network handover.
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Accused Products
Abstract
A network handover method applicable to network handover in ringing/ring back tone (RBT) or call hold is provided. According to this method, in ringing/RBT, one party performs a session negotiation with an Other End Point (OEP) via a call continuity application server, and then sends an off-hook signal to the OEP via the call continuity application server after the negotiation succeeds. Further, a call continuity application server and a user equipment (UE) are provided. According to the present disclosure, in ringing/RBT or call hold, even if the network coverage is not good, the UE may also be handed over to another network through call continuity, so as to effectively prevent the UE from dropping a call in ringing/RBT or call hold and thus improve the conversation quality of the user.
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Citations
15 Claims
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1. A method for a user equipment (UE) to perform network handover, comprising:
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sending, by the UE, a network handover request carrying session description information of the UE to a call continuity application server in a target network; performing, by the UE that initiates a handover, a session negotiation on call continuity handover in a call-hold state with an Other End Point (OEP) according to the session description information via the call continuity application server; and handing over a call corresponding to the network handover request to the target network after the session negotiation succeeds; and wherein the session description information includes call-hold information of the UE that initiates the network handover. - View Dependent Claims (2, 3)
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4. A network handover method of a user equipment (UE), comprising:
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receiving a network handover request from the UE that initiates a handover, wherein the network handover request carries session description information of the UE; if it is detected that a call is in a call-hold state, updating the session description information and sending the session description information carrying call-hold information of the UE that initiates the handover to an Other End Point (OEP); and handing over the call to a target network according to the network handover request after a session negotiation of the UE with the OEP, by using the session description information, succeeds. - View Dependent Claims (5, 6, 7, 8, 9, 10, 11, 12)
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13. A user equipment (UE), comprising:
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a session negotiation processing unit configured to send a network handover request carrying session description information of the UE to a call continuity application server in a target network, and perform a session negotiation on call continuity handover in a call-hold state with an Other End Point (OEP) according to the session description information via the call continuity application server; and a call-hold call continuity handover unit configured to hand over a call corresponding to the network handover request to the target network after the session negotiation succeeds; and wherein the session description information includes call-hold information of the UE that initiates the network handover.
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14. A call continuity application server, comprising:
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a processing unit configured to receive a network handover request from the UE that initiates a handover wherein the network handover request carries session description information of the UE, if it is detected that a call is in a call-hold state update the session description information and send the session description information carrying call-hold information of the UE that initiates the handover to an Other End Point (OEP), and perform a session negotiation by using the session description information for a handover to a target network in a call-hold state; and a control unit configured to control a call continuity network handover in a call-hold state after the session negotiation succeeds. - View Dependent Claims (15)
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Specification