Patents by Inventor Fredrik Lindholm

Fredrik Lindholm 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: 20190274025
    Abstract: A method in a proxy call session control function, P-CSCF, of handling an unauthenticated emergency call originating from a roaming user equipment that is not attached to the P-CSCF. The P-CSCF receives a session initiation protocol (SIP) REGISTER request from the UE, where the REGISTER request relating to the emergency registration. The P-CSCF determines an IP address of the UE. The P-CSCF sends an identity query to a policy and charging rules function (PCRF) indicating the IP address of the UE and requesting other identifiers of the UE. The P-CSCF receives one or more other identifiers of the UE from the PCRF. The P-CSCF obtains a TEL and/or SIP uniform resource identifier (URI) for the UE on the basis of at least one of the one or more other identifiers. The P-CSCF sends a 200 OK response to the UE in response to the SIP REGISTER request, where the 200 OK response includes the TEL and/or SIP URI.
    Type: Application
    Filed: May 17, 2019
    Publication date: September 5, 2019
    Inventors: Fredrik LINDHOLM, Ralf KELLER, Susana FERNANDEZ ALONSO, Ivo SEDLACEK
  • Patent number: 10326605
    Abstract: Methods and apparatuses for updating policy and charging rules relating to early dialogs in session initiation protocol forking in a telecommunications network. A node comprises a receiver (304), configured to receive a plurality of preliminary responses originating from a plurality of terminating end points as part of Session Initiation Protocol, SIP, forking. The node comprises an early dialog controller (314), configured, for each received preliminary response, to determine a unique identifier and to control a transmitting means, which may be a transmitter (302), to transmit a corresponding preliminary message comprising the unique identifier to a further node (400) for use as a Policy and Charging Rules Function, PCRF (200), for creating an early dialog by the further node. The receiver is further configured to receive updated data for at least one of the preliminary responses.
    Type: Grant
    Filed: July 16, 2014
    Date of Patent: June 18, 2019
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Ignacio Rivas Molina, Venkata Ramesh Balabhadruni, Patrik Dannebro, Rikard Eriksson, Susana Fernandez Alonso, Fredrik Lindholm
  • Patent number: 10123085
    Abstract: A method of synchronizing streaming media between a plurality of UEs connected to a communications network, wherein the UEs are involved in a SIP-enabled voice session over said communications network. A timestamp is provided to each of the UEs. Each of the UEs then sends a request for streamed media to an IPTV service, receives streamed media from the IPTV service, and commences playout of the streamed media in dependence upon the timestamp.
    Type: Grant
    Filed: April 15, 2014
    Date of Patent: November 6, 2018
    Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
    Inventors: Björn Norhammar, Fredrik Lindholm
  • Publication number: 20180241784
    Abstract: A method in an IP multimedia subsystem, IMS, of a telecommunications network. The loss of a secure association between a P-CSCF of the IMS and a user equipment, UE, served by the P-CSCF is detected, or a UE is relocated from a further P-CSCF to the first mentioned P-CSCF. The first mentioned P-CSCF sends a reregistration request to the UE; receives a SIP REGISTER message from the UE; and performs P-CSCF registration with the UE including establishing a new secure association with the UE.
    Type: Application
    Filed: February 27, 2015
    Publication date: August 23, 2018
    Inventors: Magnus HALLENSTÅL, Fredrik LINDHOLM
  • Patent number: 10021038
    Abstract: A method in a first network node handles data sessions in a communications network. The method includes receiving information indicating a second data session entering the communications network. The method further includes creating a second rule associated with the second data session. The second rule causes the first data session to be associated with the second data session. The method further includes determining that the second rule share a guaranteed bit rate (GBR) with a first rule associated with the first data session based on the second data session entering the communications network. The method further includes transmitting first information that the second rule and an indicator indicating the first rule and the second rule should share the GBR.
    Type: Grant
    Filed: May 16, 2014
    Date of Patent: July 10, 2018
    Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
    Inventors: Lars Lovsen, Rikard Eriksson, Fredrik Lindholm, Maria Belen Pancorbo Marcos
  • Patent number: 10009747
    Abstract: A method of operating an emergency call procedure in a telecommunications network includes storing, for a user of an IMS network, emergency contact Uniform Resource Identifiers (URIs) of one or more emergency contacts of the user who may be contacted by emergency services in the event of an emergency call from the user. The method also includes receiving an emergency call from the user and providing the emergency contact URIs to a Public Safety Answering Point, PSAP.
    Type: Grant
    Filed: June 17, 2014
    Date of Patent: June 26, 2018
    Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
    Inventors: Venkata Ramesh Balabhadruni, Fredrik Lindholm
  • Publication number: 20180146399
    Abstract: A method and apparatus for transferring a session from a packet switched access network to a circuit switched access network. A Mobility Management Entity receives a service type indicator from a gateway node. The service type indicator indicates a type of service for the session, and is associated with bearers used for the session. The Mobility Management Entity subsequently receives, from an eNodeB, an indication that the session is to be transferred from the packet switched network to the circuit switched access network. The Mobility Management Entity determines the bearers associated with the session using the service type indicator, and initiates transfer of the session using those bearers. This ensures that the correct bearers are transferred regardless of whether or not identifiers such as QCI values have been ascribed to other types of service.
    Type: Application
    Filed: January 17, 2018
    Publication date: May 24, 2018
    Inventors: Fredrik Lindholm, Ralf Keller
  • Patent number: 9924414
    Abstract: The invention relates to methods and nodes for supporting a session transfer, for a user equipment, from a circuit switched network to a packets witched network. According to one aspect a method for operating a control node of a core network is provided. The method comprises the steps: requesting from a radio access network of the circuit switched network information on whether a capability of the user equipment related to the session transfer are compatible with a network configuration related to the session transfer; receiving from the radio access network an indication whether the capability of the user equipment and the network configuration are compatible; determining whether to indicate that the session transfer is supported by using the received compatibility indication; and setting an indication whether the session transfer is supported according to the determination.
    Type: Grant
    Filed: May 15, 2013
    Date of Patent: March 20, 2018
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Ralf Keller, Peter Hedman, Fredrik Lindholm
  • Publication number: 20180063688
    Abstract: A method in a proxy call session control function, P-CSCF, of handling an unauthenticated emergency call originating from a roaming user equipment, UE, which is not attached to the P-CSCF. The P-CSCF receives a SIP INVITE request from the UE, the INVITE request relating to the unauthenticated emergency call, and determines an IP address of the UE. The P-CSCF sends an identity query to a policy and charging rules function, PCRF, indicating the IP address of the UE and requesting other identifiers of the UE, and receives one or more other identifiers of the UE from the PCRF. The P-CSCF constructs a TEL and/or SIP uniform resource identifier, URI, for the UE on the basis of at least one of said other identifiers, inserts the URI into the SIP INVITE request, and sends the SIP INVITE request to a public safety answering point, PSAP. Also provided are corresponding methods in other nodes and for authenticated emergency calls, and apparatus for implementing the methods.
    Type: Application
    Filed: April 1, 2015
    Publication date: March 1, 2018
    Inventors: Fredrik LINDHOLM, Ralf KELLER, Susana FERNANDEZ ALONSO, Ivo SEDLACEK
  • Patent number: 9900806
    Abstract: A method and apparatus for handling a call transfer from a circuit switched access network to a packet switched access network. A Mobile Switching Centre Server receives a notification that a call for a terminal requires handover from a circuit switched access network to a packet switched access network. The MSC Server determines whether the terminal is currently registered in an IMS network and/or whether the MSC Server is registered such that it can perform handover from the circuit switched access network to the packet switched access network. If so, then return Single Radio Voice Call Continuity is invoked to perform a handover of the call from the circuit switched access network to the packet switched access network. If not then the MSC Server invokes error handling procedures.
    Type: Grant
    Filed: October 21, 2015
    Date of Patent: February 20, 2018
    Assignee: Telefonaktiebolaget L M Ericsson (publ)
    Inventors: Fredrik Lindholm, Ralf Keller
  • Patent number: 9900347
    Abstract: A method and apparatus for handling trust in an IP Multimedia Subsystem network. A node in the IP Multimedia Subsystem network receives a Session Initiation Protocol message from a remote node. The message includes an indicator indicating the level of trust of a communication sent from the remote node to the IP Multimedia Subsystem node. The node can then apply a security policy to the message, the security policy being determined by the indicator.
    Type: Grant
    Filed: September 14, 2007
    Date of Patent: February 20, 2018
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Fredrik Lindholm, Peter Hedman, Monica Wifvesson
  • Publication number: 20180041495
    Abstract: A technique for handling an access from a user equipment (110) accessing an application function (150) is provided. As to a method aspect of the technique, the access is received via a packet core network (140) of a mobile telecommunications network (100). The application function (150) determines that the access from the user equipment (110) fulfills a predefined access pattern. The application function (150) triggers sending of a control message to the packet core network (140) in response to the determination. The control message controls the packet core network (140) to terminate a session with the user equipment (110).
    Type: Application
    Filed: March 10, 2015
    Publication date: February 8, 2018
    Inventors: Fredrik Lindholm, Venkata Ramesh Balabhadruni
  • Patent number: 9888409
    Abstract: A method and apparatus for transferring a session from a packet switched access network to a circuit switched access network. A Mobility Management Entity receives a service type indicator from a gateway node. The service type indicator indicates a type of service for the session, and is associated with bearers used for the session. The Mobility Management Entity subsequently receives, from an eNodeB, an indication that the session is to be transferred from the packet switched network to the circuit switched access network. The Mobility Management Entity determines the bearers associated with the session using the service type indicator, and initiates transfer of the session using those bearers. This ensures that the correct bearers are transferred regardless of whether or not identifiers such as QCI values have been ascribed to other types of service.
    Type: Grant
    Filed: June 12, 2015
    Date of Patent: February 6, 2018
    Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
    Inventors: Fredrik Lindholm, Ralf Keller
  • Patent number: 9882943
    Abstract: A method is proposed for providing a mobile terminal associated with a user with access to a visited Internet Protocol based mobile communication network. The mobile terminal generates a network information element that comprises a home network identifying element that identifies a home network of the user, and a domain name of the visited IP based mobile communication network as a base domain identifier. The mobile terminal then provides this special network information element to visited IP based mobile communication network, which executes a subscription generating procedure for generating a subscription for the user upon recognizing the special network information element and provides the mobile terminal access based on the generated subscription.
    Type: Grant
    Filed: May 6, 2016
    Date of Patent: January 30, 2018
    Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
    Inventors: Fredrik Lindholm, Bo Åström, Alf Heidermark
  • Patent number: 9867090
    Abstract: Dual Radio Access Transfer of an IMS in an alerting phase for the Packet Switched to Circuit Switched direction includes initiating an IMS media session towards UE and, during a session alerting phase, making a determination that a DRVCC transfer is required from a PS to CS, access, sending a SIP message from the UE to a SCC-AS, over the PS access, informing the SCC-AS of the DRVCC transfer, and responding to receipt of the SIP message at the SCC-AS by sending a SIP INVITE from the SCC-AS towards MSC. The SIP INVITE includes an identity of the UE as a called party identity and the STN as the calling party identity. The Transfer includes sending from the MSC to the UE a CS Setup message, whereupon the MSC is placed in a state in which it expects a CS Answer from the UE.
    Type: Grant
    Filed: April 12, 2013
    Date of Patent: January 9, 2018
    Assignee: TELEFONAKTIEBOLAGET L M ERICSSON (PUBL)
    Inventors: Magnus Hallenstål, Jan Holm, Fredrik Lindholm
  • Patent number: 9866672
    Abstract: A method is provided for use in a communication system that includes a first terminal and an emergency center. The method includes transmitting, by a second terminal, an indicator indicating that emergency service is required for the first terminal, and automatically establishing a call session between the first terminal and the emergency center in response to the indicator.
    Type: Grant
    Filed: November 8, 2013
    Date of Patent: January 9, 2018
    Assignee: TELEFONAKTIEBOLAGET LM ERISCCON (PUBL)
    Inventors: Venkata Ramesh Balabhadruni, Fredrik Lindholm
  • Patent number: 9854508
    Abstract: An IMS (IP Multimedia Subsystem) network contains at least one of (A) a discovery function (2) for providing ISIM (IP Multimedia Subscriber Identity Module) discovery information to the mobile device (1) and (B) a provisioning function (2, 5, 6) for providing, in response to a request from a mobile device, an ISIM to the mobile device (1). Where the IMS network contains the discovery function, the discovery function is adapted to provide ISIM discovery information to the mobile device, and where the IMS network contains the provisioning function, the provisioning function is adapted to provide an ISIM to the mobile device (1).
    Type: Grant
    Filed: August 31, 2010
    Date of Patent: December 26, 2017
    Assignee: Telefonaktiebolaget L M Ericsson (publ)
    Inventors: Oscar Ohlsson, Luis Barriga, Fredrik Lindholm
  • Patent number: 9813949
    Abstract: Techniques and apparatus are described for controlling set up of a terminating call from an IMS to a UE, in a Circuit Switched Fallback (CSFB) situation. A first MSC receives a terminating call from IMS and tries to page the UE. The UE has moved to the second MSC and performs a Location Update to the second MSC. The second MSC informs the first MSC with a Send Identification message comprising an address of the second MSC. The first MSC maintains the IMS subscription of the UE at Cancel Location and forwards the terminating call to the second MSC. The first MSC acts as relay for subsequent call control messages for calls of the UE. The first and second MSCs are supervising the ongoing calls and as soon as all calls are completed the second MSC registers the UE into IMS and the first MSC de-registers the UE from IMS.
    Type: Grant
    Filed: May 9, 2014
    Date of Patent: November 7, 2017
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Ralf Keller, Fredrik Lindholm, Karl-Peter Ranke
  • Patent number: 9749318
    Abstract: A method and apparatus for key management in a communication network. A Key Management Server (KMS) receives from a first device a request for a token associated with a user identity, the user identity being associated with a second device. The KMS then sends the requested token and a user key associated with the user to the first device. The KMS subsequently receives the token from the second device. A second device key is generated using the user key and a modifying parameter associated with the second device. The modifying parameter is available to the first device for generating the second device key. The second device key is then sent from the KMS to the second device. The second device key can be used by the second device to authenticate itself to the first device, or for the first device to secure communications to the second device.
    Type: Grant
    Filed: August 8, 2014
    Date of Patent: August 29, 2017
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Rolf Blom, Fredrik Lindholm, Mats Näslund, Karl Norrman
  • Publication number: 20170214534
    Abstract: Methods and apparatuses for updating policy and charging rules relating to early dialogs in session initiation protocol forking in a telecommunications network. A node comprises a receiver (304), configured to receive a plurality of preliminary responses originating from a plurality of terminating end points as part of Session Initiation Protocol, SIP, forking. The node comprises an early dialog controller (314), configured, for each received preliminary response, to determine a unique identifier and to control a transmitting means, which may be a transmitter (302), to transmit a corresponding preliminary message comprising the unique identifier to a further node (400) for use as a Policy and Charging Rules Function, PCRF (200), for creating an early dialog by the further node. The receiver is further configured to receive updated data for at least one of the preliminary responses.
    Type: Application
    Filed: July 16, 2014
    Publication date: July 27, 2017
    Applicant: Telefonaktiebolaget LM Ericsso (publ)
    Inventors: Ignacio RIVAS MOLINA, Venkata Ramesh BALABHADRUNI, Patrik DANNEBRO, Rikard ERIKSSON, Susana FERNANDEZ ALONSO, Fredrik LINDHOLM