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).

  • Publication number: 20110188425
    Abstract: A Dual mode mobile terminal (MT2) comprising a WLAN interface (WLAN_NIC) and a cellular radio interface (GSM_NIC) has been described wherein when receiving a Page Request message over the cellular radio interface (GSM_NIC), indicating an incoming voice call over the cellular radio interface, or upon receiving an indication from the user of the dual mode terminal to perform an outgoing voice call, performing a determination as to whether a WLAN coverage is possible from an AP providing WLAN telephony calls, and if so responding, by issuing a WLAN call message to a WLAN AP over the WLAN interface to an interworking node (IWFN).
    Type: Application
    Filed: February 28, 2011
    Publication date: August 4, 2011
    Applicant: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Gunnar Rydnell, Hans Rönneke, Stefan Rommer, Jan Lindskog
  • Patent number: 7937085
    Abstract: A Dual mode mobile terminal (MT2) comprising a WLAN interface (WLAN_NIC) and a cellular radio interface (GSM_NIC) has been described wherein when receiving a Page Request (6) message over the cellular radio interface (GSM_NIC), indicating an incoming voice call over the cellular radio interface, or upon receiving an indication from the user of the dual mode terminal to perform an outgoing voice call, performing a determination (7) as to whether a WLAN coverage is possible from an AP providing WLAN telephony calls, and if so responding, by issuing a WLAN call message (8) to a WLAN AP over the WLAN interface to an interworking node (IWFN).
    Type: Grant
    Filed: September 17, 2004
    Date of Patent: May 3, 2011
    Assignee: Telefonaktiebolaget L M Ericcson (PUBL)
    Inventors: Gunnar Rydnell, Hans Rönneke, Stefan Rommer, Jan Lindskog
  • Publication number: 20110064011
    Abstract: In one aspect, the present invention provides a method for selecting a GGSN. The method may include obtaining a network address for a home agent; transmitting a request to a name server for a name associated with the network address; receiving from the name server in response to the request a name associated with the network address; initiating a GPRS attachment; and after initiating the GPRS attachment, initiating a PDP context activation, wherein the step of initiating the PDP context activation comprises transmitting the name to an SGSN, and the SGSN is configured to use the name to lookup an IP address of a GGSN.
    Type: Application
    Filed: May 9, 2008
    Publication date: March 17, 2011
    Inventors: Stefan Rommer, Ann-Christine Sander
  • Publication number: 20110040855
    Abstract: In one aspect of the invention, a system and method reduce central database signalling. The system and method select a gateway in response to an event; determine whether to transmit a gateway identifier identifying the selected gateway to a central database; and indicate whether the gateway identifier has been transmitted to the central database.
    Type: Application
    Filed: October 22, 2008
    Publication date: February 17, 2011
    Inventors: György Miklós, Stefan Rommer, John Michael Walker
  • Publication number: 20110035787
    Abstract: When setting up communication from a user equipment UE (1), such as for providing IP access for the UE in order to allow it to use some service, information or an indication or at least one network properly relating to a first network, e.g. the current access network (3, 3?), is sent to the UE from a node (13) in a sue and network such as the home network (5) of the subscriber ask UE. The information or indication can be sent in a first stage of an authentication procedure being part of the setting up of a connection from the UE. In particular, the network property can indicate whether the access network (3, 3?) is trusted or not.
    Type: Application
    Filed: November 5, 2008
    Publication date: February 10, 2011
    Applicant: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
    Inventors: Mats Naslund, Jari Arkko, Rolf Blom, Vesa Lehtovirta, Karl Norrman, Stefan Rommer, Bengt Sahlin
  • Patent number: 7855999
    Abstract: A wireless station, in a wireless LAN, includes a network interface to a network interface device, e.g., a NIC, that includes a transceiver, an antenna, at least a first power supply or energy holder. The wireless station supports transmission of data in frames of variable length. Frame fragmentation is implemented by dividing a (long) frame into a number of frame fragments. Each fragment is sent as a non-fragmented frame. The length of a time period before or between transmission of (consecutive) frame fragments is controlled in order to decrease energy consumption during a predetermined time interval.
    Type: Grant
    Filed: June 7, 2004
    Date of Patent: December 21, 2010
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Jan Lindskog, Stefan Rommer, Gunnar Rydnell
  • Patent number: 7835384
    Abstract: In a wireless network using a carrier sense multiple access (CSMA) scheme is provided a method, system, devices and instruction sets for detecting transmission levels and adjusting the transmission levels for both a connection point and mobile stations within the network in order to reduce power consumption in network devices and minimize interference problems while keeping hidden node problems on a controlled level.
    Type: Grant
    Filed: July 1, 2004
    Date of Patent: November 16, 2010
    Assignee: Telefonaktiebolaget LM Ericsson
    Inventors: Anders Furuskär, Arne Simonsson, Jonas Pettersson, Stefan Rommer
  • Publication number: 20100281148
    Abstract: A technique for registering a mobile terminal with an anchor node and for handling data packets after registration is provided. A method implementation of this technique comprises the steps of providing support for a plurality of mobility management protocols, wherein the mobility management protocols are deployed in parallel within a protocol stack of an anchor node, receiving, from a mobile terminal, a registration message, and selectively handling the registration message in accordance with the mobility management protocol associated with the registration message.
    Type: Application
    Filed: October 9, 2007
    Publication date: November 4, 2010
    Inventors: Zoltan Richard Turanyi, Gergely Pongracz, Stefan Rommer, Goran Hall
  • Publication number: 20100097977
    Abstract: The present invention relates to a device, method, system, and program for facilitating the control in an intermediate telecommunications network (202) of user plane traffic between a visiting node (209, 210), attached to an access network (203), and a home network (201). The intermediate network includes a mobile IP proxy (207) for acting as home agent for the mobile node and relaying user plane packets between the home network and visiting node.
    Type: Application
    Filed: December 28, 2006
    Publication date: April 22, 2010
    Applicant: TELEFONAKTIEBOLAGET L M ERICSSON (PUBL)
    Inventors: Stefan Rommer, Zoltán Richárd Turányi
  • Publication number: 20090313379
    Abstract: A method, infrastructure node (11, 12, 202), and mobile node (1) arranged to hide topology information from the user and mobile node by translating topology information to non-topology related address information and using session management messages of a first communication protocol as bearer for Internet Protocol mobility messages relating to a second communication protocol.
    Type: Application
    Filed: July 3, 2006
    Publication date: December 17, 2009
    Applicant: TELEFONAKTIEBOLAGET L M ERICSSON (PUBL)
    Inventors: Gunnar Rydnell, Tomas Goldbeck-Löwe, Stefan Rommer
  • Publication number: 20080305744
    Abstract: The present invention relates to a method and a wireless station for initiating radio resource measurements. A wireless station identifies a need for radio resource measurements by a second wireless station despite there is no association between the wireless station and the second wireless station allowing direct radio communication between said stations. The wireless station initiates a request for radio resource measurements by the second wireless station.
    Type: Application
    Filed: December 5, 2005
    Publication date: December 11, 2008
    Inventors: Anders Furuskar, Arne Simonsson, Jonas Pettersson, Per Magnusson, Stefan Rommer
  • Publication number: 20080219218
    Abstract: A network architecture comprising at least one core network, each core network comprising a number of packet data gateway access supporting nodes GASNs handling mobile user station access over an access network, said core network(s) further providing access to one or more global packet data communication networks (IN), and one or more nodes holding subscriber or mobile user station related information. The GASNs are further adapted to support intercommunication over a mobility protocol interface to, at reception of a request for change of access type from a mobile user station, establish information about the previous GASN of the mobile user station, and to, using the established information, update an established communication context concerning the mobile user station or create a new communication context concerning the mobile user station such that mobility between different access network types is enabled for a mobile user station without interruption of an ongoing session.
    Type: Application
    Filed: September 27, 2005
    Publication date: September 11, 2008
    Inventors: Gunnar Rydnell, Stefan Rommer, Krister Boman
  • Publication number: 20080058003
    Abstract: A Dual mode mobile terminal (MT2) comprising a WLAN interface (WLAN_NIC) and a cellular radio interface (GSM_NIC) has been described wherein when receiving a Page Request (6) message over the cellular radio interface (GSM_NIC), indicating an incoming voice call over the cellular radio interface, or upon receiving an indication from the user of the dual mode terminal to perform an outgoing voice call, performing a determination (7) as to whether a WLAN coverage is possible from an AP providing WLAN telephony calls, and if so responding, by issuing a WLAN call message (8) to a WLAN AP over the WLAN interface to an interworking node (IWFN).
    Type: Application
    Filed: September 17, 2004
    Publication date: March 6, 2008
    Applicant: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
    Inventors: Gunnar Rydnell, Hans Ronneke, Stefan Rommer, Jan Lindskog
  • Publication number: 20070223403
    Abstract: In a wireless network using a carrier sense multiple access (CSMA) scheme is provided a method, system, devices and instruction sets for detecting transmission levels and adjusting the transmission levels for both a connection point and mobile stations within the network in order to reduce power consumption in network devices and minimize interference problems while keeping hidden node problems on a controlled level.
    Type: Application
    Filed: July 1, 2004
    Publication date: September 27, 2007
    Inventors: Anders Furuskar, Arne Simonsson, Jonas Pettersson, Stefan Rommer
  • Patent number: 7024188
    Abstract: The invention discloses a method for use in a wireless communications system with a plurality of broadcasting nodes, comprising the step of enabling one node in the system to function as a central node in said system and letting said node enable measurements on at least one frequency in a frequency band used by the system. Said measurements are carried out to detect if said at least one frequency is being utilized by a transmitter foreign to the system. Preferably, the measurement is enabled by means of the node transmitting a message to other nodes in the system, said message being a message pre-defined within the system as a message prohibiting all nodes from transmitting during a certain interval, said message being transmitted after the system has been detected by the node to be silent during a predefined interval between frame transmissions from the nodes in the system.
    Type: Grant
    Filed: September 13, 2002
    Date of Patent: April 4, 2006
    Assignee: Telefonaktiebolaget L M Ericsson (publ)
    Inventors: Jamshid Khun-Jush, Peter Schramm, Jan Lindskog, Stefan Rommer, Mathias Pauli, Gerd Zimmermann, Fredrik Johansson, Anders Ranheim, Peter Larsson
  • Publication number: 20050157688
    Abstract: A method of performing selective filtering, a network comprising a station, an AP and a PAC, whereby synchronisation between the AP and the PAC is performed in order to allow filtering of messages in at least the AP or in the PAC has been provided. An AP is moreover provided being able to perform both legacy and 802.11i association and authentication, whereby if a 802.11i station is encountered, filtering is performed until a 802.11i association and authentication is successful, and if a legacy station is encountered allowing the station to initiate login procedure with a PAC, if the station is not authenticated by the PAC, filtering messages to the station in question.
    Type: Application
    Filed: March 10, 2003
    Publication date: July 21, 2005
    Inventors: Gunnar Rydnell, Jan Lindskog, Stefan Rommer, Per-Erik Johansson
  • Publication number: 20050068924
    Abstract: A method for providing quality of services of at least one mobile terminal in a wireless network, such as a 802.11 wireless network, wherein a service proxy functionality within an access point of the network or another entity provide quality of service operations to the at least one mobile terminal.
    Type: Application
    Filed: November 12, 2002
    Publication date: March 31, 2005
    Inventors: Jan Lindskog, Stefan Rommer, Gunnar Rydnell, Ulf Hansson, Jan Kullander, Frederik Johansson
  • Publication number: 20050054294
    Abstract: The invention discloses a method for use in a wireless communications system with a plurality of broadcasting nodes, comprising the step of enabling one node in the system to function as a central node in said system and letting said node enable measurements on at least one frequency in a frequency band used by the system. Said measurements are carried out to detect if said at least one frequency is being utilized by a transmitter foreign to the system. Preferably, the measurement is enabled by means of the node transmitting a message to other nodes in the system, said message being a message pre-defined within the system as a message prohibiting all nodes from transmitting during a certain interval, said message being transmitted after the system has been detected by the node to be silent during a predefined interval between frame transmissions from the nodes in the system.
    Type: Application
    Filed: September 13, 2002
    Publication date: March 10, 2005
    Inventors: Jamshid Khun-Jush, Peter Schramm, Jan Lindskog, Stefan Rommer, Mathias Pauli, Gerd Zimmermann, Fredrik Johansson, Anders Ranheim, Peter Larsson
  • Publication number: 20050018638
    Abstract: The present invention relates to a wireless station, in a wireless LAN, comprising a network interface to network interface means comprising receiving/transmitting means, antenna means, at least first power supply means or energy holding means, said wireless station further supporting transmission of data in frames of variable length. Frame fragmentation is implemented by dividing a (long) frame into a number of frame fragments. Each fragment is sent as a non-fragmented frame and means are provided for controlling the length of the time periods before/between transmission of (consecutive) frame fragments in order to decrease energy consumption during a predetermined time interval.
    Type: Application
    Filed: June 7, 2004
    Publication date: January 27, 2005
    Applicant: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Jan Lindskog, Stefan Rommer, Gunnar Rydnell