US 11,963,240 B2
User device, control device, and communication control method
Yudai Kawasaki, Sakai (JP); Tsuyoshi Takakura, Sakai (JP); and Masafumi Aramoto, Sakai (JP)
Assigned to SHARP KABUSHIKI KAISHA, Sakai (JP); and FG Innovation Company Limited, Tuen Mun (HK)
Appl. No. 17/293,942
Filed by SHARP KABUSHIKI KAISHA, Sakai (JP); and FG Innovation Company Limited, Tuen Mun (HK)
PCT Filed Nov. 7, 2019, PCT No. PCT/JP2019/043717
§ 371(c)(1), (2) Date May 14, 2021,
PCT Pub. No. WO2020/100719, PCT Pub. Date May 22, 2020.
Claims priority of application No. 2018-215878 (JP), filed on Nov. 16, 2018.
Prior Publication US 2022/0015158 A1, Jan. 13, 2022
Int. Cl. H04W 4/00 (2018.01); H04W 60/00 (2009.01); H04W 76/10 (2018.01); H04W 76/18 (2018.01); H04W 76/19 (2018.01)
CPC H04W 76/10 (2018.02) [H04W 60/00 (2013.01); H04W 76/18 (2018.02); H04W 76/19 (2018.02)] 5 Claims
OG exemplary drawing
 
1. A user device for implementing error handling, the user device comprising:
a control unit that establishes, with at least one control device in a core network, in a Protocol Data Unit (PDU) session establishment procedure, using a Local Area Data Network (LADN) Data Network Name (DNN), a PDU session for the LADN; and
a transceiver unit that:
transmits, to the at least one control device in the core network, a first PDU session modification request message used to initiate a PDU session modification procedure,
receives, in the PDU session modification procedure, an No. 46 5G Session Management (5GSM) cause value from the at least one control device in the core network, and
prohibits, based on the No. 46 5GSM cause value, transmission of a second PDU session modification request message for the PDU session,
wherein:
the LADN DNN is provided by the user device in the PDU session establishment procedure, the No. 46 5GSM cause value indicates an update to LADN information stored at the user device,
the user device requests, based on reception of the No. 46 5GSM cause value, new LADN information by including an LADN indication information element in a registration request message used to initiate a registration procedure for requesting the new LADN information, and
the transmission of the second PDU session modification request message for the PDU session for the LADN is prohibited until the registration procedure for requesting the new LADN information is completed.