公开(公告)号：US12200651B2

公开(公告)日：2025-01-14

申请号：US17638851

申请日：2020-08-18

Applicant: Telefonaktiebolaget LM Ericsson (publ)

Inventor： Lasse Olsson ,  Qian Chen ,  Peter Ramle

IPC: H04W60/04 ,  H04W12/06 ,  H04W12/08 ,  H04W36/00 ,  H04W36/06 ,  H04W40/34 ,  H04W48/18

Abstract: Systems and methods are disclosed herein for Access and Mobility Function (AMF) re-allocation. In one embodiment, a method for AMF re-allocation includes, at an initial AMF, receiving a registration request for a User Equipment (UE) from a Radio Access Network (RAN), deciding to initiate an AMF re-allocation procedure, sending the registration request to the RAN for delivery to a target AMF for the AMF re-allocation procedure, and sending a UE security context of the UE to another Network Function (NF). The method further includes, at the target AMF, receiving a message from the RAN wherein the message includes the registration request from the UE, obtaining the UE security context of the UE from the other NF, and performing protected NAS signaling related to a registration procedure for the UE using the UE security context of the UE.

公开(公告)号：US12167497B2

公开(公告)日：2024-12-10

申请号：US17609664

申请日：2020-05-06

Applicant: Telefonaktiebolaget LM Ericsson (publ)

Inventor： Lasse Olsson ,  Stefan Rommer ,  Qian Chen

IPC: H04W8/12 ,  H04M15/00 ,  H04W28/02 ,  H04W84/04

Abstract: Disclosed herein is a method performed by an AMF entity in a Visited Public Land Mobile Network, VPLMN, entity serving a roaming UE, the method comprises: obtaining, by the AMF entity, a subscribed UE-AMBR for the UE; sending, by the AMF entity, an Access Management, AM, Policy request message towards a Visited Policy Control Function, V-PCF, entity in the VPLMN to establish or update an AM Policy for the roaming UE; receiving by the AMF entity in response to sending the AM Policy request message, an AM Policy response message sent by the V-PCF entity and comprising Access and mobility related policy information that includes a serving network UE-AMBR for the UE decided by the V-PCF entity; and deploying the serving network UE-AMBR instead of the subscribed UE-AMBR by sending the policy control information including the determined UE-AMBR to a RAN node in the serving network.

公开(公告)号：US12127150B2

公开(公告)日：2024-10-22

申请号：US17642744

申请日：2020-10-06

Applicant: Telefonaktiebolaget LM Ericsson (publ)

Inventor： Qian Chen ,  Christofer Lindheimer ,  Stefan Rommer ,  Paul Schliwa-Bertling ,  Magnus Stattin ,  Alessio Terzani

IPC: H04W60/00 ,  H04W76/15 ,  H04W84/04

CPC classification number: H04W60/005 ,  H04W76/15 ,  H04W84/042

Abstract: A method performed by a UE having multiple USIMs is provided. The method includes registering the UE in a first PLMN. The method includes moving the UE into a CM-connected state in the first PLMN. The method includes setting up a PDU session in the first PLMN. The method includes using a DNS, via the PDU session in the first PLMN, to select a N3IWF in a second PLMN. The method includes accessing the N3IWF via IP connectivity provided by the first PLMN and initiating a registration procedure with an AMF node in the second PLMN using the N3IWF, the UE indicating that the AMF node shall only use N3IFW for NAS notifications after registration. The method includes completing the registration procedure to register with the second PLMN. The method includes setting up a PDU session with a SMF node in the second PLMN without user plane resources.

公开(公告)号：US11800440B2

公开(公告)日：2023-10-24

申请号：US17522592

申请日：2021-11-09

Applicant: Telefonaktiebolaget LM Ericsson (publ)

Inventor： Daniel Nilsson ,  Qian Chen ,  Stefan Rommer ,  Paul Schliwa-Bertling

IPC: H04W48/18 ,  H04W76/11 ,  H04W8/08 ,  H04W8/22 ,  H04W12/06 ,  H04W60/00 ,  H04W84/04

CPC classification number: H04W48/18 ,  H04W8/08 ,  H04W8/22 ,  H04W12/06 ,  H04W60/00 ,  H04W76/11 ,  H04W84/042

Abstract: A method performed by a serving Access and Mobility Management Function (AMF) serving a wireless communication device. The method includes receiving, from a target AMF, a request for information regarding the wireless communication device. The method also includes submitting, in reply to the request for information, a current user equipment (UE) context of the wireless communication device and an identifier of an ongoing non 3rd Generation Partnership Project (non-3GPP) access Protocol Data Unit (PDU) session for the wireless communication device. The method further includes notifying a Non-3GPP Interworking Function (N3IWF) to remove the current UE context, wherein the N3IWF is configured to enable the wireless communication device to attach to the core network over non-3GPP access.

公开(公告)号：US20230284114A1

公开(公告)日：2023-09-07

申请号：US18112865

申请日：2023-02-22

Applicant: Telefonaktiebolaget LM Ericsson (publ)

Inventor： Qian Chen ,  Juying Gan ,  Stefan Rommer ,  Ann-Christine Sander ,  Paul Schliwa-Bertling

IPC: H04W36/32 ,  H04W8/08 ,  H04W36/00 ,  H04W48/16

CPC classification number: H04W36/32 ,  H04W8/08 ,  H04W36/0022 ,  H04W48/16

Abstract: System comprising a mobility management entity, MME, a first Radio Access node, RAN (eNB) offering Long Term Evolution, LTE, access, and a second radio access node, RAN (gNB) offering New Radio, NR, access; a user entity, UE, supporting both Long Term Evolution, LTE, and New Radio, NR, Radio Access Technology, RAT.

公开(公告)号：US11729742B2

公开(公告)日：2023-08-15

申请号：US16753717

申请日：2018-10-05

Applicant: Telefonaktiebolaget LM Ericsson (publ)

Inventor： Qian Chen ,  Stefan Rommer ,  Paul Schliwa-Bertling

IPC: H04W68/02 ,  H04W76/27 ,  H04W8/08 ,  H04W48/16 ,  H04W68/00

CPC classification number: H04W68/02 ,  H04W8/08 ,  H04W48/16 ,  H04W68/005 ,  H04W76/27

Abstract: Embodiments herein relate generally to a Control plane, CP, node, a method performed by the CP node, a Radio Access Network, RAN, node and a method performed by the RAN node. More particularly the embodiments herein relate to handling paging.

公开(公告)号：US11722568B2

公开(公告)日：2023-08-08

申请号：US17277937

申请日：2019-08-05

Applicant: Telefonaktiebolaget LM Ericsson (publ)

Inventor： Hans Bertil Rönneke ,  Qian Chen ,  Stefan Rommer

IPC: H04L67/141 ,  H04W76/10 ,  H04L12/46

CPC classification number: H04L67/141 ,  H04L12/4633 ,  H04W76/10

Abstract: Methods are provided to operate an SMF node. A request to create a session for a wireless device is received. A communication establishment request is transmitted to an NEF node responsive to receiving the request to create the session for the wireless device, wherein the communication establishment request includes UPF node information for a tunnel between a UPF node and the NEF node to be used for the session for the wireless device. A communication establishment response is received from the NEF node, wherein the communication establishment response includes NEF node information for the tunnel between the UPF node and the NEF node to be used for the session for the wireless device. A tunnel information update is transmitted to the UPF node after receiving the communication establishment response, wherein the tunnel information update includes the NEF node information for the tunnel between the UPF node and the NEF node.

公开(公告)号：US20230018958A1

公开(公告)日：2023-01-19

申请号：US17786637

申请日：2020-12-18

Applicant: Telefonaktiebolaget LM Ericsson (publ)

Inventor： Juying Gan ,  Yunjie Lu ,  Qian Chen ,  Peter Hedman

IPC: H04W36/00 ,  H04W36/30 ,  H04W76/30 ,  H04W48/18

Abstract: A method performed by a network node for transferring Protocol Data Unit (PDU) sessions of a UE during a mobility procedure in which the UE is moved from a 5GS to an Evolved Packet System (EPS) is disclosed. The method comprises one or more of determining that a target Mobility Management Entity (MME) for the mobility procedure in the EPS supports a first number of EPS Bearers that is less than a second number of EPS Bearer Identities (EBIs) assigned to a number of PDU sessions (e.g., and their associated Quality of Service (QoS) Flows) of the UE that are to be transferred from the 5GS to the EPS; determining which of the PDU sessions and/or QoS Flows of the UE are not to be transferred to the target MME; and releasing, requesting the release of or initiating release of the PDU sessions and/or QoS Flows that are not to be transferred to the target MME.

公开(公告)号：US20220131941A1

公开(公告)日：2022-04-28

申请号：US17277937

申请日：2019-08-05

Applicant: Telefonaktiebolaget LM Ericsson (publ)

Inventor： Hans Bertil Rönneke ,  Qian Chen ,  Stefan Rommer

IPC: H04L67/141 ,  H04W76/10 ,  H04L12/46

Abstract: Methods are provided to operate an SMF node. A request to create a session for a wireless device is received. A communication establishment request is transmitted to an NEF node responsive to receiving the request to create the session for the wireless device, wherein the communication establishment request includes UPF node information for a tunnel between a UPF node and the NEF node to be used for the session for the wireless device. A communication establishment response is received from the NEF node, wherein the communication establishment response includes NEF node information for the tunnel between the UPF node and the NEF node to be used for the session for the wireless device. A tunnel information update is transmitted to the UPF node after receiving the communication establishment response, wherein the tunnel information update includes the NEF node information for the tunnel between the UPF node and the NEF node.

公开(公告)号：US11297551B2

公开(公告)日：2022-04-05

申请号：US16495882

申请日：2017-11-22

Applicant: Telefonaktiebolaget LM Ericsson (publ)

Inventor： Peter Ramle ,  Qian Chen ,  Josefin Karlsson

IPC: H04W36/08 ,  H04W8/08 ,  H04W48/16 ,  H04W48/20 ,  H04W80/10

Abstract: The embodiments herein relate to a method performed by an AMF (106) for handling handover. The AMF (106) receives one of: a handover required message and a first request message. The handover required message is received from an S-RAN (104s) and the first request message is received from another AMF (106) in response to the handover required message. The AMF (106) sends to a SMF (108), a set of one or more first request messages and activates a timer. The AMF (106) determines whether at least one of the following is true: a certain amount of time has elapsed since the timer was activated and the AMF (106) has received a first PDU response message for each one of the first PDU request messages. The AMF (106) transmits a handover request message to a T-RAN (104t) as a result of determining that at least one of the conditions is true.