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Maintaining a packet-switched signaling connection during handover between cells

  • US 9,814,090 B2
  • Filed: 03/11/2015
  • Issued: 11/07/2017
  • Est. Priority Date: 03/12/2014
  • Status: Active Grant
First Claim
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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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