Patents by Inventor Stefan Rommer

Stefan Rommer has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 11064457
    Abstract: According to one aspect of the present disclosure, a method of paging policy differentiation in a 5G telecommunications network is provided. A User Plane Function (UPF) receives downlink data for a target User Equipment (UE), and provides a data notification to a Session Management Function (SMF), the data notification comprising a Quality of Service (QoS) indicator, which the SMF uses to determine QoS Information (QoSI) that is sent to an Access Management Function (AMF). The AMF determines whether a paging policy selection should be performed by the AMF or by a Radio Access Node (RAN) that serves the target UE: if by the AMF, the AMF selects a paging policy based on the QoSI and sends a paging message to the RAN, which pages the UE; if by the RAN, the AMF provides paging policy information to the RAN, which selects a paging policy and pages the UE accordingly.
    Type: Grant
    Filed: March 15, 2018
    Date of Patent: July 13, 2021
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Aldo Bolle, Qian Chen, Paul Schliwa-Bertling, Stefan Rommer
  • Publication number: 20210195490
    Abstract: Access and Mobility Management Function, AMF, adapted for taking part in handover from a 5G system, 5GS, to an Evolved Packet System, EPS, an interface being provided between a Mobility Management Entity, MME, of the EPS and the AMF. The AMF being adapted for signalling with a Session Management Function and Packet Data Network, PDN, Gateway-Control plane, SMF and PGW-C, entity, the AMF being adapted for—providing a request (102d, 2-2a) to the SMF and PGW-C entity to provide a Session Management, SM, Context that also includes mapped EPS, Bearer Contexts (102d); —wherein for PDU Sessions with PDU Session type Ethernet or Unstructured, providing (102e1) a capability of a target MME of supporting a Non-IP PDN type to the PGW-C and SMF entity in the request (2-2a) to allow the PGW-C and SMF entity to determine whether or not to include an EPS Bearer context for non-IP PDN type; —transmitting the request (2-2a) to the SMF.
    Type: Application
    Filed: October 17, 2018
    Publication date: June 24, 2021
    Applicant: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Stefan ROMMER, Jan BACKMAN, Qian CHEN, Göran HALL, Åsa LARSEN
  • Publication number: 20210185585
    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.
    Type: Application
    Filed: August 13, 2019
    Publication date: June 17, 2021
    Inventors: Qian Chen, Juying Gan, Stefan Rommer, Ann-Christine Sander, Paul Schliwa-Bertling
  • Patent number: 11039381
    Abstract: There are provided methods, arrangements and entities for an Access and mobility Function, AMF, and for a NF Repository Function, NRF in a 5G supporting Communication Network, CN, providing services to a User Entity. Also, a NF Repository Function, NRF, is described. A request (2A) for SMF information to the NRF to retrieve at least a list of SMFs that supports the DNN and optionally which network slices each SMF supports is transmitted.
    Type: Grant
    Filed: March 15, 2018
    Date of Patent: June 15, 2021
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Maria Luisa Mas Rosique, Göran Hall, Stefan Rommer
  • Patent number: 10993272
    Abstract: Systems and methods for efficient delivery of infrequent small data are provided. A system for providing communication infrequent small Protocol Data Units (PDUs) to/from a UE includes an Access Node (AN); a session management functions node; and a User Plane (UP) functions entity. The session management functions node receives a session setup request and selects the UP functions entity and a tunnel identifier associated with the UE. In case of an IP PDU session type, trigger an establishment of a UP. The UP functions entity creates a UE context for the UE; stores the UE context for the UE; completes an establishment in a Control Plane (CP); and provides the AN with uplink tunnel information. The AN stores the UE context and transmits a session setup response to the UE. In this way, an improved ratio of the signalling/user data relation may be obtained for devices sending infrequent small data.
    Type: Grant
    Filed: October 16, 2017
    Date of Patent: April 27, 2021
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Kaj Johansson, Gunnar Rydnell, Stefan Rommer, Jan Backman
  • Publication number: 20210076352
    Abstract: Embodiments herein related to notifications concerning UE unreachability. Especially, the embodiments herein provide methods performed by an Access and Mobility Management Function, AMF, as well as a corresponding Access and Mobility Management Function, AMF, relating to notifications concerning UE unreachability.
    Type: Application
    Filed: April 10, 2019
    Publication date: March 11, 2021
    Applicant: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Qian CHEN, Roland GUSTAFSSON, Stefan ROMMER, Hans RÖNNEKE, Paul SCHLIWA-BERTLING
  • Patent number: 10924919
    Abstract: A wireless communication device (12) served by a wireless wide area network (WWAN) base station supports per-bearer switching of bearer traffic between the WWAN and a wireless local area network (WLAN) in a manner transparent to the WLAN. The device in this regard establishes a secure tunnel (24) through the WLAN to a security gateway (22), based on the device receiving a message from the WWAN base station (18) to establish the secure tunnel (24). The device switches bearer traffic between the WWAN and the WLAN on a per bearer basis, with bearer traffic switched to the WLAN being transported through the secure tunnel (24) and over a connection (26) between the security gateway (22) and the WWAN base station (18).
    Type: Grant
    Filed: October 7, 2016
    Date of Patent: February 16, 2021
    Assignee: Telefonaktiebolaget LM Ericsson (Publ)
    Inventors: Helka-Liina Määttanen, Mattias Bergström, Torsten Dudda, Gino Masini, Filip Mestanov, Stefan Rommer, Jari Vikberg
  • Patent number: 10848497
    Abstract: The present invention faces the issue of introducing a new direct interface NG10, between a unified data management function and a session management function in a HPLMN, i.e., a home SMF, in order to obtain a service profile for a UE, at the home SMF from the UDM, and provides for the home SMF obtaining such service profile from a policy control function via the existing NG7 interface.
    Type: Grant
    Filed: March 3, 2017
    Date of Patent: November 24, 2020
    Assignee: Telefonaktiebolaget LM Ericsson (Publ)
    Inventors: David Castellanos Zamora, Göran Hall, Angel Navas Cornejo, Stefan Rommer
  • Patent number: 10841863
    Abstract: A network node controls communication of user equipment in a mobile network with cellular network access and wireless local area network access. The network node receives from a further network node, information concerning a wireless local area network access to which the user equipment is attached and information concerning a cellular network access to which the user equipment is attached. On the basis of the received information, the network node controls whether to provide at least one service via the wireless local area network access or via the cellular network access.
    Type: Grant
    Filed: May 29, 2018
    Date of Patent: November 17, 2020
    Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (publ)
    Inventors: Ralf Keller, Afshin Abtin, Magnus Hallenstål, Stefan Rommer
  • Patent number: 10834649
    Abstract: The present disclosure relates to a method, in a mobility function (MF) node. The method comprises receiving (S1) information about a mapping to a property, of each of a plurality of radio bearers of a radio device for carrying data traffic between the radio device and a first radio access network (RAN). The method also comprises determining (S2) based on the received (S1) information, that at least one of the radio bearers can be handed over to a second RAN. The method also comprises initiating (S3) a handover command to the radio device instructing the radio device to hand over the at least one radio bearer to the second RAN.
    Type: Grant
    Filed: May 28, 2014
    Date of Patent: November 10, 2020
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Dinand Roeland, Stefan Rommer, Mattias Bergström, Oumer Teyeb
  • Publication number: 20200344655
    Abstract: Disclosed is a method and access management entity for selecting a session management (SM) entity for serving a wireless communication device (WCD) in a core network that comprises an access management entity serving the WCD and an anchor SM entity that controls a first user plane entity that handles a data session associated with the WCD in a first domain, and a second SM entity for controlling a second user plane entity in a second domain of the core network. The method is performed by the access management entity and comprises selecting—based on WCD information and SM domain information—the second SM entity as an additional intermediate SM entity to control a user plane entity in the second domain for handling the data session in the second domain; requesting the second SM entity to act as the additional intermediate SM; and receiving a session response message.
    Type: Application
    Filed: January 8, 2018
    Publication date: October 29, 2020
    Inventors: Stefan Rommer, Qian Chen, Patrik Dannebro, Åsa Larsen
  • Publication number: 20200305211
    Abstract: Systems and methods relating to providing Data Network (IMS) session continuity across 4G access and 5G access and core networks are disclosed. In some embodiments, a method of operation of a wireless device comprises establishing over a first access network (e.g., 4G) a first packet data connection to a packet data network (e.g., IMS) identified by a first packet data network identifier (e.g., APN), performing a registration with an application entity (P-CSCF) of the packet data network; and sending over a second access network (5G) a request for a second packet data connection to the packet data network (IMS) identified by a second packet data network identifier (e.g., DNN) wherein the request comprises an identifier of the application entity (P-CSCF) of the packet data network with which the wireless device has previously registered. The request for the second packet data connection may comprise the DN public identifier (i.e.
    Type: Application
    Filed: December 4, 2017
    Publication date: September 24, 2020
    Inventors: George FOTI, Stefan ROMMER, Lila MADOUR
  • Publication number: 20200296583
    Abstract: A method of protecting WLAN Control Protocol (WLCP) message exchange between a Trusted WLAN Access Gateway (TWAG)(112) of a Trusted WLAN Access Network (TWAN)(110) and a User Equipment (UE)(101) are provided. The method comprises deriving, by an Authentication, Authorization, and Accounting, (AAA) Server(103) of an Evolved Packet Core (EPC) network which is interfaced with the TWAN, and by the UE, a Master Session Key (MSK) and an Extended MSK (EMSK), sending, from the AAA Server to a Trusted WLAN AAA Proxy (TWAP)(113) of the TWAN and an Access Point (AP)(111) of the TWAN, the MSK or a key derived from at least the MSK, and deriving, by the TWAN or by the AAA Server, and by the UE, from the MSK, the EMSK, or the key derived from at least the MSK or the EMSK, a key for protecting the WLCP message exchange.—Corresponding devices, computer programs, and computer program products are further provided.
    Type: Application
    Filed: May 28, 2020
    Publication date: September 17, 2020
    Inventors: Dinand ROELAND, Vesa LEHTOVIRTA, Karl NORRMAN, Stefan ROMMER
  • Publication number: 20200267689
    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.
    Type: Application
    Filed: October 5, 2018
    Publication date: August 20, 2020
    Applicant: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Qian CHEN, Stefan ROMMER, Paul SCHLIWA-BERTLING
  • Patent number: 10716000
    Abstract: A method of protecting WLAN Control Protocol (WLCP) message exchange between a Trusted WLAN Access Gateway (TWAG) (112) of a Trusted WLAN Access Network (TWAN) (110) and a User Equipment (UE) (101) are provided. The method comprises deriving, by an Authentication, Authorization, and Accounting, (AAA) Server (103) of an Evolved Packet Core (EPC) network which is interfaced with the TWAN, and by the UE, a Master Session Key (MSK) and an Extended MSK (EMSK), sending, from the AAA Server to a Trusted WLAN AAA Proxy (TWAP) (113) of the TWAN and an Access Point (AP) (111) of the TWAN, the MSK or a key derived from at least the MSK, and deriving, by the TWAN or by the AAA Server, and by the UE, from the MSK, the EMSK, or the key derived from at least the MSK or the EMSK, a key for protecting the WLCP message exchange. —Corresponding devices, computer programs, and computer program products are further provided.
    Type: Grant
    Filed: November 29, 2017
    Date of Patent: July 14, 2020
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Dinand Roeland, Vesa Lehtovirta, Karl Norrman, Stefan Rommer
  • Publication number: 20200137672
    Abstract: The embodiments herein relate to methods and functions for handling a user equipment, UE, that is in an idle state with respect to at least one access type e.g., 3GPP access or non-3GPP access.
    Type: Application
    Filed: March 15, 2018
    Publication date: April 30, 2020
    Applicant: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Stefan ROMMER, Qian CHEN, Daniel NILSSON, Paul SCHLIWA-BERTLING
  • Patent number: 10630847
    Abstract: A method and a radio network node, a method and a core network node as well as a method and a charging node for enabling management of a traffic steering policy are disclosed. The radio network node receives, from the core network node, an indication of the traffic steering policy indicating one or more access resources and at least one of a PDN connection, a packet flow and a bearer to use on the one or more access resources. Furthermore, the radio network node determines to steer traffic. radio network node transmits access information to the core network node. The access information indicates a currently used access resource for the PDN connection, the packet flow or the bearer. The core network node transmits the access information. The charging node determines an amount of traffic for the PDN connection, packet flow or bearer on the currently used access resource.
    Type: Grant
    Filed: September 7, 2016
    Date of Patent: April 21, 2020
    Assignee: Telefonaktiebolaget LM Ericsson (Publ)
    Inventors: Jari Vikberg, Ralf Keller, Stefan Rommer
  • Patent number: 10616764
    Abstract: A method implemented in a user equipment (UE) includes connecting to a WLAN access point. The method further includes constructing a domain name for a packet system network, the domain name including network partition information for the packet system network. The method further includes transmitting, to a DNS server via the WLAN access point, the constructed domain name. The method further includes receiving, from the server, at least one address corresponding to a network node associated with the network partition information.
    Type: Grant
    Filed: April 8, 2016
    Date of Patent: April 7, 2020
    Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
    Inventors: Stefan Rommer, Henrik Basilier, Torbjörn Cagenius, Gunnar Mildh, Gunnar Nilsson, Lennart Norell, Göran Rune, Ann-Christine Sander
  • Publication number: 20200107256
    Abstract: The invention relates to methods and devices for enabling relocation of Access and Mobility Management Functions (AMFs). In an aspect of the invention a method performed by a Non-3rd Generation Partnership Project (3GPP) Interworking Function (14, N3IWF) enabling a wireless communication device (10) to attach to a core network (100) over non-3GPP access, to facilitate re-location of the wireless communication device (10) from an Access and Mobility Management Function (13, AMF) currently serving the wireless communication device (10) over non-3GPP access to the core network (100), to a target AMF (21) which is to serve the wireless communication device (10) over 3GPP access to the core network (100). The method comprises receiving (S119a), from the target AMF (21), a request to redirect any further signalling of the wireless communication device (10) from the currently serving AMF (13) to the target AMF (21); and redirecting any signalling of the wireless communication device (10) to the target AMF (21).
    Type: Application
    Filed: May 4, 2018
    Publication date: April 2, 2020
    Applicant: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Daniel NILSSON, Qian CHEN, Stefan ROMMER, Paul SCHLIWA-BERTLING
  • Publication number: 20200107182
    Abstract: A communication network system comprising core network nodes, CNN, such as Session Management Function, a Policy Control function, PCF, an Online Charging System, OCS, and a Network Exposure Function, NEF, the system further comprising a radio access node, RAN, and a User Entity, UE, the system further comprising a user plane function, UPF, communi-cating with a data network, DN; and a control plane, which again comprises at least a control plane comprising an Access Mobility Function, AMF, the system being adapted for the AMF—retrieving (301,) or determining a registration area, RA, for the UE. The CNN—retrieving (4-2,) a service area such as a a TA or TAI, and—allocating a Presence Reporting Area, PRA, —informing (302;) the AMF of the PRA. The AMF—defining (303A) or retrieving (303B) a UE Reporting Area, URA, in dependence of the RA and the PRA, —transmitting (304) the URA, to the UE, or—transmitting (305) the URA to the RAN.
    Type: Application
    Filed: June 21, 2018
    Publication date: April 2, 2020
    Inventors: Qian Chen, Peter Hedman, Josefin Karlsson, Peter Ramle, Stefan Rommer