公开(公告)号：US11197216B2

公开(公告)日：2021-12-07

申请号：US16535691

申请日：2019-08-08

Applicant: MEDIATEK INC.

Inventor： Chien-Chun Huang-Fu ,  Chi-Hsien Chen

IPC: H04W36/14 ,  H04W36/36 ,  H04W76/11 ,  H04W88/06 ,  H04W76/20 ,  H04W8/18 ,  H04W40/02 ,  H04W48/12 ,  H04L12/813 ,  H04L29/06 ,  H04L12/725 ,  H04W28/02 ,  H04W28/12 ,  H04W36/00 ,  H04W68/02 ,  H04W76/27 ,  H04L29/08 ,  H04W28/04 ,  H04W36/08 ,  H04W48/18 ,  H04W84/04

Abstract: A method for handling PDU session handover procedure collision in a next generation NG/5G system is proposed. Both network-triggered and UE-triggered PDU session handover procedures can occur at the same time. If Paging or Notification for PDU session handover comes before UE initiated MO PDU session establishment procedure for PDU session handover, then UE should avoid sending the PDU session establishment request for PDU session handover but only send the service request as a response to paging. On the other hand, if Paging or Notification for PDU session handover comes after UE initiated MO PDU session establishment procedure for PDU session handover, then UE should avoid sending the service request for PDU session handover but proceed with the PDU session establishment procedure as a response to paging.

公开(公告)号：US11039361B2

公开(公告)日：2021-06-15

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: H04W36/14 ,  H04W76/20 ,  H04W76/11 ,  H04W40/02 ,  H04W48/12 ,  H04L12/813 ,  H04L29/06 ,  H04L12/725 ,  H04W28/02 ,  H04W28/12 ,  H04W36/00 ,  H04W68/02 ,  H04W76/27 ,  H04L29/08 ,  H04W28/04 ,  H04W36/08 ,  H04W48/18 ,  H04W84/04

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：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：US10952094B2

公开(公告)日：2021-03-16

申请号：US16371442

申请日：2019-04-01

Applicant: MEDIATEK INC.

Inventor： Chien-Chun Huang-Fu ,  Chi-Hsien Chen

IPC: H04W28/02 ,  H04W76/20 ,  H04W80/10 ,  H04W48/18 ,  H04W76/22

Abstract: A method of defining ATtention (AT) commands for 5G QoS management is proposed. AT commands for modifying PDU sessions, creating and modifying QoS flows and QoS rules, and for querying QoS flow and QoS rule parameters are defined for 5G networks. Specifically, the AT command can be a set command for triggering a PDU session modification procedure and thereby creating and modifying QoS flows and QoS rules. For example, AT command +C5GQOS is introduced for creating and modifying QoS flows, AT command +C5GQOSRDP is introduced for retrieving QoS flow parameters, AT command +CGTFT can be reused for creating and modifying QoS rules, and AT command +CGTFTRDP can be reused for retrieving QoS rule parameters.

公开(公告)号：US20210051516A1

公开(公告)日：2021-02-18

申请号：US16937407

申请日：2020-07-23

Applicant: MediaTek Inc.

Inventor： Chien-Chun Huang-Fu ,  Chi-Hsien Chen

IPC: H04W28/02 ,  H04W8/06

Abstract: Various solutions for single network slice selection assistance information (S-NSSAI) based congestion control with respect to user equipment and network apparatus in mobile communications are described. An apparatus may receive a message with a back-off timer from the network node. The apparatus may determining whether the back-off timer is applied in all public land mobile networks (PLMNs). The apparatus may start the back-off timer and associating the back-off timer with a mapped home PLMN (HPLMN) S-NSSAI of a protocol data unit (PDU) session in an event that the back-off timer is applied in all PLMNs.

公开(公告)号：US20200267783A1

公开(公告)日：2020-08-20

申请号：US16792448

申请日：2020-02-17

Applicant: MEDIATEK INC.

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

IPC: H04W76/11 ,  H04W76/30

Abstract: A method of handling mapped EPS bearer context with duplicate EPS bearer ID (EBI) for 5GS to EPS inter-system change enhancement is proposed. UE is provided with a mapped EPS bearer context IE by the network to create a new mapped EPS bearer associated with a PDU session. UE detects collision of the new mapped EPS bearer—it has the same EBI as an existing EPS bearer. Upon successfully process the create request, UE either replaces the existing EPS bearer with the new mapped EPS bearer, or deletes the EPS bearer with duplicate EBI by explicit signaling to the network. As a result, when inter-system change from 5G to EPS happens, there is no EPS collision.

公开(公告)号：US20200162968A1

公开(公告)日：2020-05-21

申请号：US16687166

申请日：2019-11-18

Applicant: MEDIATEK INC.

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

IPC: H04W36/00

Abstract: A method of handling mapped Evolved Packet System (EPS) bearer context for invalid QoS flow description is proposed. During a PDU session establishment procedure or a PDU session modification procedure, a UE may receive a mapped EPS bearer context IE for creating a new mapped EPS bearer of a PDU session. If there is no corresponding QoS flow description associated to the new mapped EPS bearer, e.g., if there is no corresponding authorized QoS flow description IE in the PDU session establishment accept message or in the PDU session modification command message, then the UE should send another PDU session modification request message to the network to delete the new mapped EPS bearer context.

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：US20200053596A1

公开(公告)日：2020-02-13

申请号：US16530152

申请日：2019-08-02

Applicant: MEDIATEK INC.

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

IPC: H04W28/12 ,  H04W28/02

Abstract: A method of QoS rule management with enhanced handling on QoS flow description is proposed. UE checks QoS configuration received from the network for QoS operation errors. When UE receives a QoS rule associated with a specific QFI but has no QoS flow description for the QFI, UE further determines whether the QoS rule is of a GBR QoS flow. If so, UE detects a QoS operation error. If the QoS rule is the default QoS rule, then UE releases the PDU session. If the QoS rule is not the default QoS rule, then UE either rejects a PDU session modification command that carries the QoS rule or deletes the QoS rule carried by a PDU session establishment accept with a 5GSM cause value indicating the QoS operation error.

公开(公告)号：US20200053010A1

公开(公告)日：2020-02-13

申请号：US16525852

申请日：2019-07-30

Applicant: MEDIATEK INC.

Inventor： Chien-Chun Huang-Fu ,  Chi-Hsien Chen

IPC: H04L12/813 ,  H04W28/04 ,  H04W28/02

Abstract: A method at enhanced error handling for 5G QoS operations is proposed. A PDU session defines the association between the UE and the data network that provides a PDU connectivity service. Each PDU session is identified by a PDU session ID, and may include multiple QoS flows and QoS rules. Within a PDU session, there should be one and only one default QoS rule. The default QoS rule indication (DQR) and the QoS flow identifier (QFI) of QoS rule should not be changed. When the QoS operation carried by the command message is “Modify existing QoS rule and delete packet filters”, then it is defined as a semantic error in the QoS operation if all the packet filters of a QoS rule are deleted, and the QoS rule is a QoS rule of a PDU session of IPv4, IPv6, IPv4v6, or Ethernet PDU session type.