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 start a timer upon completing the NAS signaling procedure based on whether the radio bearer has been or is being established in the target network, wherein the UE starts the timer if no radio bearer has been established in the target network, and wherein the UE releases the NAS signaling connection upon the timer expiring.
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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.
9 Citations
16 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 start a timer upon completing the NAS signaling procedure based on whether the radio bearer has been or is being established in the target network, wherein the UE starts the timer if no radio bearer has been established in the target network, and wherein the UE releases the NAS signaling connection upon the timer expiring. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A User Equipment (UE) comprising:
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a non-access stratum (NAS) layer circuit that performs a NAS signaling procedure via a NAS signaling connection by the UE; a management circuit that monitors a radio resource status and determines 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 a timer, wherein the UE determines whether to start the timer upon completing the NAS signaling procedure based on whether the radio bearer has been or is being established in the target network, wherein the UE starts the timer if no radio bearer has been established in the target network, and wherein the UE releases the NAS signaling connection upon the timer expiring. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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Specification