US 9,814,090 B2
Maintaining a packet-switched signaling connection during handover between cells
Yu-Syuan Jheng, Taipei (TW); Chien-Chun Huang-Fu, Hsinchu (TW); Hung-Lin Chang, Taipei (TW); and Yuan-Chieh Lin, Taipei (TW)
Assigned to MEDIATEK INC., Hsinchu (TW)
Filed by MEDIATEK INC., Hsinchu (TW)
Filed on Mar. 11, 2015, as Appl. No. 14/644,443.
Claims priority of provisional application 61/951,691, filed on Mar. 12, 2014.
Prior Publication US 2015/0264741 A1, Sep. 17, 2015
Int. Cl. H04W 36/00 (2009.01); H04W 76/06 (2009.01); H04W 76/04 (2009.01)
CPC H04W 76/068 (2013.01) [H04W 36/0066 (2013.01); H04W 76/046 (2013.01)] 14 Claims
OG exemplary drawing
 
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.