Maintaining a packet-switched signaling connection during handover between cells
First Claim
1. A method comprising:
- performing a non-access stratum (NAS) signaling procedure via a NAS signaling connection by a user equipment (UE);
monitoring a radio resource status;
determining whether a radio bearer has been or is being established for a radio resource control (RRC) connection for data transmission in a target network; and
determining whether to release the NAS signaling connection after completing the NAS signaling procedure based on whether the radio bearer in the target network has been or is being established, wherein the UE receives an RRC message from a source network during the NAS signaling procedure, wherein the UE determines that the radio bearer in the target network is being established, and wherein the UE transmits an RRC radio bearer setup complete message to a source network after the radio bearer has been established in the target network.
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Accused Products
Abstract
Methods and apparatus are provided to reduce service interruption for intra-RAT and inter-RAT handover procedures. The UE performs a NAS signaling procedure via a NAS signaling connection in a mobile communication network. The UE monitors a radio resource status and determines whether a radio bearer has been or is being established for a RRC connection for data transmission. The UE determines whether to release the NAS signaling connection after completing the NAS signaling procedure based on whether the radio bearer has been established. In one embodiment, the UE monitors a radio resource status and determines whether a radio bearer has been established for a RRC connection for data transmission. The UE determines whether to start a timer upon completing the NAS signaling procedure based on whether the radio bearer has been or is being established.
6 Citations
14 Claims
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1. A method comprising:
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performing a non-access stratum (NAS) signaling procedure via a NAS signaling connection by a user equipment (UE); monitoring a radio resource status; determining whether a radio bearer has been or is being established for a radio resource control (RRC) connection for data transmission in a target network; and determining whether to release the NAS signaling connection after completing the NAS signaling procedure based on whether the radio bearer in the target network has been or is being established, wherein the UE receives an RRC message from a source network during the NAS signaling procedure, wherein the UE determines that the radio bearer in the target network is being established, and wherein the UE transmits an RRC radio bearer setup complete message to a source network after the radio bearer has been established in the target network. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A user equipment (UE), comprising:
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a memory; a processor, wherein the processor executes program instructions stored in the memory, and wherein the program instructions comprise; a non-access stratum (NAS) layer of a protocol stack that performs a NAS signaling procedure via a NAS signaling connection; and a radio resource control (RRC) layer of the protocol stack that monitors a radio resource status and thereby determines whether a radio bearer in a target network has been or is being established for an RRC connection for data transmission, wherein the processor determines whether to release the NAS signaling connection after completing the NAS signaling procedure based on whether the radio bearer in the target network has been or is being established, wherein the UE is adapted to receive an RRC message from a source network during the NAS signaling procedure, wherein the UE is adapted to determine that the radio bearer in the target network is being established, and wherein the UE is adapted to transmit an RRC radio bearer setup complete message to a source network after the radio bearer has been established in the target network. - View Dependent Claims (8, 9, 10, 11)
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12. A user equipment (UE), comprising:
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a memory; a processor that executes program instructions stored in the memory; a protocol stack circuit for determining whether a radio bearer has been or is being established in a target network for an RRC connection for data transmission; and a management circuit for determining whether to release a non-access stratum (NAS) signaling connection after a NAS signaling procedure has been completed based on whether the radio bearer has been or is being established in the target network, wherein the management circuit interworks with the protocol stack circuit and detects a radio bearer setup message, wherein the UE is adapted to receive an RRC message from a source network during the NAS signaling procedure, wherein the UE is adapted to determine that the radio bearer in the target network is being established, and wherein the UE is adapted to transmit an RRC radio bearer setup complete message to a source network after the radio bearer has been established in the target network. - View Dependent Claims (13, 14)
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Specification