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).

  • Patent number: 9596640
    Abstract: A method of routing a session from a calling party in a serving communication network of the calling party to a called party is described. The serving communication network of the calling party is distinct from a home communication network of the calling party. The method is executed by a session routing node in the serving communication network of the calling party. In order to optimize a session routing path of signaling data of the session, the method comprises receiving from the home communication network of the calling party a session routing request requesting routing the signaling data of the session to the called party via the serving communication network of the calling party, and routing the signaling data of the session to the called party via the serving communication network of the calling party based on the received session routing request.
    Type: Grant
    Filed: January 16, 2015
    Date of Patent: March 14, 2017
    Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
    Inventors: Ralf Keller, Fredrik Lindholm, Gert Öster, Mats Stille
  • Patent number: 9596275
    Abstract: A technique is described allowing an IMS enabled network to terminate a communication request directed towards a user device in a well-defined way, even for cases in which multiple registrations for IMS are present that are related to the same physical user device. A method embodiment of this technique comprises registering multiple user agents for one and the same user device, wherein from each user agent contact information including a device ID identifying the user device is provided; and processing a communication request directed towards the user device, the processing comprising identifying multiple identical device IDs of registered contacts, and treating the communication request according to a predetermined handling scheme related to the detection of identical device IDs.
    Type: Grant
    Filed: July 1, 2015
    Date of Patent: March 14, 2017
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Ralf Keller, Andreas Witzel, Arne Pehrsson, Stephen Terrill
  • Publication number: 20170029030
    Abstract: A body part of a vehicle includes a structural component and a deformation component. A connecting component is fastened to an end portion of the deformation component. The connecting component has a contact surface configured to come into contact with a mating contact surface of the structural component. A normal spacing is formed between the contact surface and the mating contact surface, and the connecting component is configured to form force-transmitting contact between the contact surface and the mating contact surface in the event of a crash.
    Type: Application
    Filed: July 13, 2016
    Publication date: February 2, 2017
    Inventors: Eduard Ewert, Ralf Keller
  • Publication number: 20170028833
    Abstract: An arrangement in a motor vehicle includes a subframe. An energy source is arranged in a region of the subframe and components are assigned to the energy source. The energy source and the components are positioned in front of the subframe in a crash direction. The subframe has a window which exceeds the external dimensions of at least one of the energy source or the components and is configured to allow the at least one of the energy source or the components to dip into the window.
    Type: Application
    Filed: July 13, 2016
    Publication date: February 2, 2017
    Inventors: Eduard Ewert, Ralf Keller
  • Patent number: 9560517
    Abstract: A method of providing a service to a user equipment (UE) via a packet data network gateway (PDN GW), wherein the UE is served by a visited public land mobile network (V-PLMN) and wherein the UE has a subscription with a home public land mobile network (H-PLMN) comprising the steps of: providing, by a register in the H-PLMN, a H-PLMN-allowed indication, indicating whether a PDN GW in the H-PLMN is authorized to be selected for the UE for execution of the service, and providing, based on the H-PLMN-allowed indication, an indication to the UE, whether the UE can expect successful execution of the service.
    Type: Grant
    Filed: March 3, 2015
    Date of Patent: January 31, 2017
    Assignee: Telefonaktiebolaget L M Ericsson (publ)
    Inventors: Ralf Keller, Patrik Dannebro
  • Publication number: 20170025655
    Abstract: A battery device for an at least partially electrically operated vehicle and a method for producing the battery device. The battery device includes a plurality of battery modules, each having at least one battery cell, and a receiving device for receiving the battery modules. In this arrangement, the receiving device includes a dividing wall, which is arranged underneath the battery modules, and a base plate, which is arranged underneath the dividing wall. The dividing wall and the base plate are attached to at least one connecting element and are connected to one another by the connecting element while being spaced apart.
    Type: Application
    Filed: July 19, 2016
    Publication date: January 26, 2017
    Inventors: Stanislaw Klimek, Bernd Palmer, Matthias Herntier, Ralf Keller, Florian Scheerer
  • Patent number: 9544338
    Abstract: The present invention proposes a solution for providing IMS services to users having circuit-switched controlled terminals. In particular, it is proposed, in order to allow IMS to take the full call and service control, to combine circuit-switched and packet-based multimedia functionality in a new node type called Mobile Access Gateway Control Function (MAGCF). In particular the present invention provides a method for ensuring that the MAGCF node acts as a roaming anchor point in order to enforce the handling of originating and terminating calls in the IMS.
    Type: Grant
    Filed: September 16, 2014
    Date of Patent: January 10, 2017
    Assignee: Telefonaktiebolaget L M Ericsson (publ)
    Inventors: Andreas Witzel, Ralf Keller
  • Patent number: 9538574
    Abstract: A technique for controlling set up of a terminating call to a UE in a CSFB situation involving a first MSC paging the UE and a second MSC where the UE is performing a Location Update is described. A method implementation of this technique comprises receiving, from an HLR, a PRN message and forwarding information received in the PRN message to the second MSC.
    Type: Grant
    Filed: May 23, 2011
    Date of Patent: January 3, 2017
    Assignee: TElefonaktiebolaget L M Ericsson (publ)
    Inventors: Ralf Keller, Karl-Peter Ranke, Andreas Witzel
  • Patent number: 9538361
    Abstract: The invention provides a solution for registering a terminal having a packet-switched and circuit-switched functionality in a packet-switched service domain, such as the IMS over a circuit-switched access domain. In particular it is proposed to send a packet-switched registration message packed in a circuit-switched transport bearer (USSD) to a circuit node (HLR, MSC, dispatcher) which selects an adapter node (IA) being responsible for performing a registration in the packet-switched service domain on behalf of the user using the information provided with the packet-switched registration message and by deriving and adding additional information.
    Type: Grant
    Filed: September 7, 2007
    Date of Patent: January 3, 2017
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Andreas Witzel, Ralf Keller
  • Patent number: 9521590
    Abstract: The present invention relates to a method of operating a radio access node (10) adapted to handle multiple bearers, a related radio access node (10), a method of operating a network control node (36) adapted to control the radio access node (10) handling multiple bearers, a communication system adapted to control multiple bearers, a computer program and a computer program product. Multiple bearers comprise a first packet switched bearer related to a voice service and at least one second packet switched bearer. Upon change of an operative condition for a first packet switched bearer a transfer of a voice service is initiated (S10) from the first packet switched bearer to a circuit switched bearer. This is followed by a decision (S12) on initiation of a handover for the second packet switched bearer, parallel to the transfer of the voice service, from a first packet switched access to a second packet switched access based on bearer control information indicating possibility of a parallel handover.
    Type: Grant
    Filed: February 12, 2014
    Date of Patent: December 13, 2016
    Assignee: Telefonaktiebolaget L M Ericsson (publ)
    Inventors: Ralf Keller, Ann-Christine Sander
  • Patent number: 9509547
    Abstract: The invention includes methods of using IMS Centralized Services, ICS, in the selection of a service domain relating to a call involving a User Equipment, UE, being served by a CS access network. In one aspect a method includes receiving a request from a routing node, such as a Mobile Switching Center, MSC, or a Gateway Mobile Switching Center, GMSC, for a service domain selection at a Service Control Point, SCPin the UE's IMS network (801). The SCP has a Service Domain Selection, SDS, function, which retrieves data relating to the UE from a Domain Selection function (802). Based on the retrieved data, the SDS selects either the IMS service domain or the CS service domain as the service domain for routing the call (803), and sends an indication of the selected service domain to the routing node (805). Other aspects include methods for domain selection at the originating and terminating sides of the call, and network entities configured to carry out the methods.
    Type: Grant
    Filed: December 7, 2010
    Date of Patent: November 29, 2016
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Ralf Keller, Fredrik Lindholm
  • Publication number: 20160345226
    Abstract: In a mobile network with a plurality of access networks, a control node controls access of a user equipment to that one of the access networks which is currently used by the user equipment. The control node determines an access capability of the user equipment in the access network. The access capability includes whether an IP Multimedia Subsystem (IMS) voice over Packet Switched (PS) session is supported. The control node provides an indication of the determined access capability to a Home Subscriber Server (HSS) associated with the user equipment. The indication may then be retrieved from the HSS and used to control termination of a connection to the user equipment.
    Type: Application
    Filed: August 1, 2016
    Publication date: November 24, 2016
    Inventors: Ralf Keller, Peter Hedman, Fredrik Lindholm, Magnus Olsson
  • Publication number: 20160330666
    Abstract: A system, method, node and computer program for handling re-selection of a RAN (120, 130, 140) by a UE (100) is described. The UE (100) is attached via a first RAN (120, 130) to a CS control node (110) for execution of a CS service. The method comprises that the CS control node (110) receives an indication that the execution of the CS service shall be terminated. The CS control node (110) then determines whether the UE (100) shall perform re-selection of the RAN (120, 130, 140). If so,the CS control node (110) determines selection criteria for the re-selection of the RAN (120, 130, 140) and sendsthem to the UE (100) using Non-Access Stratum related signaling. The UE (100) receives the determined selection criteria from the CS control node (110) andre-selects the RAN (120, 130, 140), considering the received selection criteria.
    Type: Application
    Filed: January 15, 2014
    Publication date: November 10, 2016
    Inventors: Ralf Keller, Peter Hedman, Paul Schliwa-Bertling
  • Patent number: 9491668
    Abstract: A method of informing a control node in a serving communication network of address information about a session anchor node in the serving communication network is described. The control node is accessible by a terminal via a circuit switched access of the serving communication network. The serving communication network of the terminal is different from an internet protocol based home communication network of the terminal. The method is executed by a session anchor node in the home communication network. The method includes receiving an update request for the control node being updated of address information about the session anchor node in the serving communication network, receiving address information about the session anchor node in the serving communication network, and sending the received address information based on the received update request.
    Type: Grant
    Filed: August 26, 2011
    Date of Patent: November 8, 2016
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Ralf Keller, Fredrik Lindholm
  • Publication number: 20160302168
    Abstract: Methods are disclosed for requesting an initial attachment of a user equipment (UE) to a packet switched mobile communication network. One method includes analyzing the communication capability of the UE, determining an access point name (APN) based on the result of the analysis. The APN is an address of a gateway node between the packet switched mobile communication network and a further packet switched network. The APN is provided to a control node of the packet switched mobile communication network to establish a bearer to the gateway node. Corresponding operations performed by UEs are disclosed.
    Type: Application
    Filed: December 4, 2014
    Publication date: October 13, 2016
    Inventors: Ralf KELLER, Ivo SEDLACEk
  • Patent number: 9467907
    Abstract: A solution is presented that includes a method of performing a Single Radio Voice Call Continuity, SRVCC, handover of a telecommunications call established by a User Equipment, UE accessing a serving network using a Packet Switched, PS, access. The serving network includes a serving IMS network and the call is a UE-undetected emergency call anchored in the serving IMS network. The method includes receiving an indication from the serving network that the established call is a UE-undetected emergency call anchored in the serving IMS network. A SRVCC handover request to hand over the call from the PS access to a Circuit Switched, CS, access is received. Handover of the call is initiated so that an Emergency Session Transfer Number-Single Radio, E-STN-SR, is used and the call continues to be routed through the IMS network in which it is anchored.
    Type: Grant
    Filed: October 10, 2012
    Date of Patent: October 11, 2016
    Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (publ)
    Inventors: Venkata Ramesh Balabhadruni, Ralf Keller, Fredrik Lindholm
  • Publication number: 20160285627
    Abstract: There is provided mechanisms for configuration of liveness check using Internet key exchange messages. A method is performed by a user equipment. The method comprises transmitting, to a core network node, a first Internet key exchange message comprising a configuration attribute indicating support of receiving a timeout period for liveness check. The method comprises receiving, from the core network node, a second Internet key exchange message comprising a configuration attribute indicating a timeout period for said liveness check.
    Type: Application
    Filed: March 25, 2015
    Publication date: September 29, 2016
    Inventors: Ivo Sedlacek, Rikard Eriksson, Ralf Keller
  • Patent number: 9456400
    Abstract: The invention refers to providing call control within a mobile network with respect to a subscriber associated to one or a plurality of user equipments (10), the mobile network comprising an application server—SCC-AS—(18) responsible for an access domain selection, the application server performing the receiving an indication to provide a best effort—BE—access domain with respect to the user equipment (10), and selecting an access domain in dependency of the received indication for routing a call with respect to the one or the plurality of user equipments. The invention further refers to an application server (18), a computer program loadable into the application server and a user equipment (10).
    Type: Grant
    Filed: March 27, 2013
    Date of Patent: September 27, 2016
    Assignee: Telefonaktiebolaget LM Ericsson (Publ)
    Inventors: Ralf Keller, Fredrik Lindholm
  • Patent number: 9456390
    Abstract: A method and apparatus for maintaining service continuity for User Equipment accessing an IP Multimedia Subsystem communication network. A routing identifier is established that identifies a Service Centralization and Continuity Application Server allocated to the User Equipment. The routing identifier is sent to the User Equipment. In the event of disruption to the service between the User Equipment and the Service Centralization and Continuity Application Server, a handover message is sent from the User Equipment via a Circuit Switched access network. The handover message includes the routing identifier, and is then forwarded to the identified Service Centralization and Continuity Application Server. This allows the same Service Centralization and Continuity Application Server to be used after the handover as was used before the handover, thereby providing service continuity.
    Type: Grant
    Filed: June 30, 2015
    Date of Patent: September 27, 2016
    Assignee: Telefonaktiebolaget L M Ericsson (Publ)
    Inventors: Ralf Keller, Fredrik Lindholm, Jian Wang
  • Publication number: 20160261754
    Abstract: A node of a wireless communication network (150; 160; 170; 210; 220; 230; 240) receives an indication from a user equipment (10). The indication indicates that a limitation of volume charged packet data services is required for the user equipment (10). Depending on the received indication, the node (150; 160; 170; 210; 220; 230; 240) prevents transmission of packet data associated with the volume charged packet data services and allows transmission of packet data associated with one or more other packet data services.
    Type: Application
    Filed: April 14, 2014
    Publication date: September 8, 2016
    Applicant: Telefonaktiebolaget L M Ericsson (Publ)
    Inventors: Ralf Keller, Fredrik Lindholm, Ivo Sedlacek