Patents by Inventor Ralf Keller

Ralf Keller 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).

  • Publication number: 20240137392
    Abstract: A method performed by a first IP multimedia system, IMS, node (15), for handling a network function in a communication network. The first IMS node (15) requests a first core network node (13) for at least a part of contact information of a network function instance, and receives a response from the first core network node (13) with at least the part of the contact information for the network function instance. The first IMS node (15) communicates with a second IMS node (16) or a core network node over a service based interface, based on the received part of the contact information for the network function instance.
    Type: Application
    Filed: March 30, 2021
    Publication date: April 25, 2024
    Inventors: Ralf Keller, Afshin Abtin, Anders Ryde, Mattias Dahlqvist
  • Publication number: 20240129029
    Abstract: A method performed by a first network node serving a first terminal when handling a call between the first terminal and a second terminal is provided. The first network node determines that the call is associated with longer than expected delays between the first and second terminals. The network node provides a Long Delay Indication to at least one of said first and second terminals to indicate said longer than expected delays in the call.
    Type: Application
    Filed: February 26, 2021
    Publication date: April 18, 2024
    Inventors: Ralf Keller, Afshin Abtin, Sorin Surdila, Bo Burman
  • Patent number: 11943678
    Abstract: Systems and methods are disclosed herein for performing a controlled handover of a wireless device from an incoming access network to a cellular access network of a visited cellular network. In some embodiments, a method for handover of a wireless device from an incoming access network to a cellular access network of a visited cellular network while in roaming comprises, at the wireless device, sending a message to a core network of the visited cellular network. The message is related to a handover of the wireless device from the incoming access network to the cellular access network of the visited cellular network and comprises an incoming access indication. The incoming access indication is an indication of the incoming access network. The method further comprises, at the core network node, receiving the message and making a decision for the handover based on the incoming access indication.
    Type: Grant
    Filed: September 11, 2019
    Date of Patent: March 26, 2024
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: George Foti, Ralf Keller
  • Publication number: 20240080787
    Abstract: Redirection and retry of registration is disclosed herein. In some embodiments, a User Equipment (UE) of a Next Generation Radio Access Network (NG-RAN) is adapted to transmit a Non-Access Stratum (NAS) registration request comprising one or more Single-Network Slice Selection Assistance Information (S-NSSAI), indicated as one or more requested S-NSSAI. The UE is further adapted to receive, in an Access Stratum (AS) protocol, an AS-level registration reattempt indication to instruct the UE to reattempt the NAS registration request in a target cell. The UE is also adapted to reattempt the NAS registration in the target cell, responsive to receiving the AS-level registration reattempt indication.
    Type: Application
    Filed: January 14, 2022
    Publication date: March 7, 2024
    Inventors: Ralf Keller, Peter Hedman, Angelo Centonza
  • Publication number: 20240080651
    Abstract: Providing Roaming Value Added Service (RVAS) network function for Home Public Land Mobile Network (HPLMN) is disclosed herein. In some embodiments, a Home Network Repository Function (H-NRF) in an HPLMN of a telecommunications network obtains information about a Home Control Network Function (NF) and a Roaming Control NF. A Visited NF in a Visited Public Land Mobile Network (VPLMN) sends a discovery request to the H-NRF in the HPLMN. The H-NRF receives the discovery request from the Visited NF in the VPLMN, and determines that, for the discovery request and the VPLMN, RVAS is applicable. The H-NRF selects the Roaming Control NF and the Home Control NF for the discovery request, and transmits, to the Visited NF, a response to the discovery request, the response comprising an address of the selected Roaming Control NF instead of an address of the selected Home Control NF.
    Type: Application
    Filed: January 24, 2022
    Publication date: March 7, 2024
    Inventors: Ralf Keller, George Foti
  • Patent number: 11917516
    Abstract: A method of operating a user equipment (“UE”) to handle an internet protocol multimedia subsystem (“IMS”) emergency call can include sending a session initiation protocol (“SIP”) REGISTER request relating to an emergency registration to a proxy call session control function (“P-CSCF”) of an IMS network. The method can further include, responsive to sending the SIP REGISTER request, receiving a response from the P-CSCF. The method can further include, responsive to receiving the response, performing an action based on the response.
    Type: Grant
    Filed: May 3, 2021
    Date of Patent: February 27, 2024
    Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
    Inventors: Fredrik Lindholm, Ralf Keller, Susana Fernandez Alonso, Ivo Sedlacek
  • Patent number: 11864091
    Abstract: A method for discovering services in a telecommunication network provided by a network function, NF, in a Service Based Architecture, SBA, based telecommunication network, said method comprising the steps of receiving a discovery request, from a Network function, NF, consumer, for discovering an NF producer to interact with, wherein said discovery request comprises a Mobile Station International Subscriber Directory Number, MSISDN, associated with said NF consumer, transmitting to an address translate server, an address translate query, wherein said address translate query comprises said MSISDN, receiving an address translate response, wherein said address translate response comprises a Universal Resource Identifier, URI, and transmitting, to said NF, a discovery response, wherein said discovery response comprises an NF producer instance for interaction with said NF.
    Type: Grant
    Filed: December 3, 2018
    Date of Patent: January 2, 2024
    Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
    Inventors: Ralf Keller, David Castellanos Zamora, Jose Miguel Dopico Sanjuan
  • Patent number: 11838805
    Abstract: A technique for preparing User Equipment, UE, mobility from a 4G network to a 2G/3G network for a UE moving from a 5G network to the 2G/3G network via the 4G network is disclosed. A method implementation of the technique is performed by a network node after the UE has moved from the 5G network to the 4G network and includes triggering, for each of one or more bearers handed over from the 5G network to the 4G network for the UE, an update bearer procedure to provide one or more 2G/3G Quality of Service, QoS, parameters to the UE required to hand over the respective bearer to the 2G/3G network when the UE moves from the 4G network to the 2G/3G network.
    Type: Grant
    Filed: August 21, 2018
    Date of Patent: December 5, 2023
    Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
    Inventors: Ralf Keller, Afshin Abtin, Ann-Christine Sander
  • Publication number: 20230388909
    Abstract: Systems and methods are disclosed herein for ensuring network control of simultaneous access to network slices with application awareness. In one embodiment, a method performed in a cellular communications system comprises, at a wireless communication device, sending, to a Policy and Control Function (PCF) via an Access and Mobility Management Function (AMF), application identifiers (IDs) of applications used by the wireless communication device and receiving, from the PCF via the AMF, one or more User Equipment (UE) Route Selection Policy (URSP) rules that are based on the application IDs. The method further comprises, at the PCF, obtaining information about one or more mutually exclusive network slices, generating the one or more URSP rules based on the application IDs and the information about the one or more mutually exclusive network slices, and sending the one or more URSP rules to the wireless communication device via the AMF.
    Type: Application
    Filed: September 17, 2021
    Publication date: November 30, 2023
    Inventors: Peter Hedman, Ralf Keller, Maria Belen Pancorbo Marcos, George Foti, Divya Peddireddy
  • Patent number: 11811033
    Abstract: A battery arrangement for a motor vehicle, with a battery which has a battery housing and a plurality of battery cells. The battery cells are arranged in the battery housing. A protective plate is arranged at least on one side of the battery. A damage detection apparatus has a damage indicator. The damage indicator is arranged on the protective plate. The damage indicator is embedded into the protective plate.
    Type: Grant
    Filed: July 21, 2021
    Date of Patent: November 7, 2023
    Inventors: Philipp Kellner, Teiwen Fehse, Christopher Volkmer, Dominik Klaiber, Ralf Keller, Maximilian Müller
  • Patent number: 11780310
    Abstract: A motor vehicle includes a traction battery module which has a hermetically sealed module housing in which at least one cell stack pair including a left-hand-side and a right-hand-side cell stack including, in each case, at least two battery cells is accommodated. The traction battery module is arranged in the vehicle floor and extends symmetrically in relation to the vehicle center (M) in the vehicle transverse direction (X). The traction battery module has a bottom wall in a horizontal plane. A gas space is formed in the module housing in the vehicle center (M) and between the left-hand-side cell stack and the right-hand-side cell stack with respect to the vehicle transverse direction (X). The module bottom wall has a degassing element centrally in the vehicle in the region of the gas space.
    Type: Grant
    Filed: November 9, 2021
    Date of Patent: October 10, 2023
    Inventors: Philipp Kellner, Sascha Mostofi, Christopher Volkmer, Immanuel Vogel, Adrian Starczewski, Dieter Schiebel, Ralf Keller, Maximilian Müller
  • Publication number: 20230319621
    Abstract: A Voice Over Wifi (VoWifi) split Protocol Data Unit (PDU) Session handover is provided. In embodiments described herein, a VoWiFi session is established via a Non-3GPP N3IWF over a 5G Core, and a handover to 3GPP access through the 5G System is initiated. During handover and based on local configuration, the Packet Data Network Gateway-Control Plane (PGW-C) and Session Management Function (SMF) (PGW-C+SMF) accepts the PDU Session transfer towards the User Equipment (UE) and Next Generation Radio Access Network (NG-RAN) by means of setting up only the Quality of Service (QoS) Flow associated with a default QoS Rule. The PGW-C+SMF initiates set up of the QoS Flow for Internet Protocol (IP) Multimedia Subsystem (IMS) voice using the PDU Session Modification procedure after the NG-RAN successfully allocates resources for the transferred PDU Session and the confirmation has reached the PGW-C+SMF.
    Type: Application
    Filed: July 2, 2021
    Publication date: October 5, 2023
    Inventors: Juying Gan, George Foti, Ralf Keller, Chunbo Wang
  • Publication number: 20230286396
    Abstract: A motor vehicle, in particular with an electric drive, having a battery system and an underride protection plate. The underride protection plate is arranged in the motor vehicle at least in sections under the battery system. The battery system includes a battery module, which includes a first wall in a first region of the battery system and a second wall in a second region of the battery system. The underride protection plate is formed in such a way that the underride protection plate directly or indirectly abuts the battery system in the first region and in the second region at least in sections, and, between the first region and the second region, forms a first section of a gas channel between the battery system and the underride protection plate.
    Type: Application
    Filed: February 28, 2023
    Publication date: September 14, 2023
    Applicant: Dr. Ing. h.c. F. Porsche Aktiengesellschaft
    Inventors: Ralf Keller, Gabriel Dilmac, Philipp Kellner, Christopher Volkmer, Simon Frieß, Salvatore Maltisotto, Sascha Mostofi, Frederik Roost
  • Publication number: 20230284108
    Abstract: Embodiments herein relate a method performed by radio network node for handling communication of a UE in a wireless communication network. The radio network node is configured to determine to initiate or avoid initiation of a process for handing over communication of the UE from the radio network node of a first RAN to a second RAN based on whether the communication includes an emergency service or not, and an identity associated to the second RAN and/or the first RAN. based on the target PLMN ID.
    Type: Application
    Filed: August 5, 2020
    Publication date: September 7, 2023
    Inventors: Afshin ABTIN, Christer GUSTAFSSON, Ralf KELLER, Ann-Christine SANDER
  • Publication number: 20230276316
    Abstract: In an example aspect, a method performed by wireless device for communication establishment is provided. The method comprises, in response to a request for establishment of a communication with the wireless device using a first network, receiving a redirection instruction to redirect to a second network, and in response to whether a node in the second network supports communication with a node in the first network, selecting a first procedure or a second procedure for establishing the communication using the second network.
    Type: Application
    Filed: May 5, 2023
    Publication date: August 31, 2023
    Inventors: Ralf Keller, Christer Gustafsson, Åsa Larsen
  • Patent number: 11743705
    Abstract: A method of operating a policy and charging rules function (“PCRF”) node to handle an internet protocol multimedia subsystem (“IMS”) emergency call can include receiving an identity request from a proxy call session control function (“P-CSCF”) of an IMS network. The identity request can include an internet protocol (“IP”) address for a user equipment (“UE”). The method can further include, responsive to receiving the identity request, determining one or more identifiers of the UE based on the IP address. The one or more identifiers are separate from the IP address. The method can further include, responsive to determining the one or more identifiers, transmitting an indication of the one or more identifiers of the UE to the P-CSCF.
    Type: Grant
    Filed: May 3, 2021
    Date of Patent: August 29, 2023
    Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
    Inventors: Fredrik Lindholm, Ralf Keller, Susana Fernandez Alonso, Ivo Sedlacek
  • Patent number: 11722936
    Abstract: In an example aspect, a method performed by wireless device for communication establishment is provided. The method comprises, in response to a request for establishment of a communication with the wireless device using a first network, receiving a redirection instruction to redirect to a second network, and in response to whether a node in the second network supports communication with a node in the first network, selecting a first procedure or a second procedure for establishing the communication using the second network.
    Type: Grant
    Filed: March 21, 2022
    Date of Patent: August 8, 2023
    Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
    Inventors: Ralf Keller, Christer Gustafsson, Åsa Larsen
  • Patent number: 11696182
    Abstract: A method performed by a core network node for handling a data service session in a packet communication network is provided. The packet communication network is configured to support fixed access between a User Equipment (UE) and an access network node. The core network node obtains a decision whether a monitored bandwidth over the fixed access is below a bandwidth requirement authorized to the UE. The bandwidth over the fixed access is monitored for a data service session between the UE and the Data Network via the fixed access. The core network node obtains a decision of how to handle the data service session based on the decision whether the monitored bandwidth over the fixed access is below the bandwidth requirement.
    Type: Grant
    Filed: February 28, 2022
    Date of Patent: July 4, 2023
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Panagiotis Saltsidis, Ralf Keller, Angel Navas Cornejo
  • Publication number: 20230208983
    Abstract: According to techniques disclosed herein, a Visited Communication Network (VCN) (10) selectively reports usage information back to a Home Communication Network (HCN) (50) for user traffic that is offloaded at the VCN (10) to a Data Network (DN) (14) rather than routed back to the HCN (50). Among the various advantages, the reporting supports charging operations in the HCN (50) regarding the offloaded traffic. Further advantages include the application of policy control and service-authorization control jointly between the VCN (10) and the HCN (50).
    Type: Application
    Filed: March 17, 2021
    Publication date: June 29, 2023
    Inventors: Ralf Keller, Maria Belen Pancorbo Marcos, Robert Törnkvist
  • Publication number: 20230187772
    Abstract: A battery for a drive of a motor vehicle includes at least one energy reservoir, a housing, an interior, and a diffuser element. The housing surrounds the interior and the energy reservoir is arranged in the interior. The diffuser element is attached to an exterior of the housing. The diffuser element includes a plurality of diffuser outlets, a plurality of side faces, and a head face. The side faces are arranged between the housing and the head face. A housing outlet is arranged in the housing, which outlet is configured so as to discharge gas out of the interior in an outgoing direction to the diffuser element. The outgoing direction is directed from the housing outlet towards the head face. The diffuser outlets are arranged on the side faces.
    Type: Application
    Filed: December 9, 2022
    Publication date: June 15, 2023
    Applicant: Dr. Ing. h.c. F. Porsche Aktiengesellschaft
    Inventors: Daniel Fink, Ralf Keller, Maximilian Müller