公开(公告)号：US11026275B2

公开(公告)日：2021-06-01

申请号：US16593030

申请日：2019-10-04

Applicant: MEDIATEK INC.

Inventor： Chien-Chun Huang-Fu ,  Chi-Hsien Chen ,  Yu-Chieh Tien

IPC: H04W76/11 ,  H04W76/36 ,  H04W76/10 ,  H04W76/18 ,  H04W76/30 ,  H04W8/30 ,  H04W28/04 ,  H04W80/02 ,  H04W12/06 ,  H04W80/10 ,  H04W80/12

Abstract: A method of handling collision between PDU session establishment and PDU session release procedures is proposed. At UE side, a UE first initiates a PDU session establishment procedure to establish a PDU session having a PDU session ID. If UE receives a PDU session release command message on the same PSI, UE should ignore the PDU session release command message, and proceed with the PDU session establishment procedure. At NW side, a network entity initiates a PDU session release procedure to release a PDU session having a PDU session ID. If the network entity receives a PDU session establishment request message from UE on the same PDU session ID, the network entity should locally release the PDU session and proceed with the PDU session establishment procedure.

公开(公告)号：US20200053819A1

公开(公告)日：2020-02-13

申请号：US16532615

申请日：2019-08-06

Applicant: MEDIATEK INC.

Inventor： Chien-Chun Huang-Fu ,  Yu-Chieh Tien ,  Shang-Ru Mo ,  Chi-Hsien Chen

IPC: H04W76/27 ,  H04L29/08

Abstract: A method of 5G session management (5GSM) state mapping is proposed when interworking. For each PDU session in 5GSM state of PDU SESSION active, PDU SESSION MODIFICATION PENDING, or PDU SESSION INACTIVE PENDING, UE maps the PDU session to a PDN connection in 4G ESM state BEARER CONTEXT ACTIVE. For any other PDU session in 5GSM state of PDU SESSION inactive, or PDU SESSION ACTIVE PENDING, UE maps the PDU session to a PDN connection in 4G ESM state BEARER CONTEXT INACTIVE.

公开(公告)号：US20200008268A1

公开(公告)日：2020-01-02

申请号：US16453085

申请日：2019-06-26

Applicant: MEDIATEK INC.

Inventor： Chien-Chun Huang-Fu ,  Yu-Chieh Tien ,  Chi-Hsien Chen ,  Shang-Ru Mo

IPC: H04W80/10 ,  H04W76/11 ,  H04W76/18 ,  H04W76/30 ,  H04W76/25

Abstract: A method for Procedure Transaction Identity (PTI) exception handling on protocol data unit (PDU) session modification and establishment procedure is proposed. If a UE receives a PDU SESSION MODIFICATION COMMAND message in which the PTI value is an assigned value that does not match any PTI in use, the UE stays in the current 5GSM state and sends a 5GSM STATUS message including 5GSM cause #47 “PTI mismatch”, and the network will send another COMMAND message with the correct PTI value. If the UE receives a PDU SESSION ESTABLISHMENT ACCEPT or REJECT message in which the PTI value is an assigned value that does not match any PTI in use, the UE responds with a 5GSM STATUS message including 5GSM cause #47 “PTI mismatch”, and the network will send another ACCEPT or REJECT message with the correct PTI value.