Patents by Inventor Thomas Rimhagen

Thomas Rimhagen 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: 6721278
    Abstract: In a cellular telecommunications system, a method of dynamically allocating packet data radio channels among users competing in a same cell for the channels involves determining a user ranking for each of plural competing users in the cell, and classifying each of the plural competing users into one of plural ranking classes. A number of the packet data radio channels available for each of the ranking classes is then determined, after which the users within each ranking class are sorted by ranking. The packet data radio channels are allocated to the users by sorted position within ranking classes. The user ranking for each of the plural competing users in the cell is related to a weighted combination of plural measures of performance for the user.
    Type: Grant
    Filed: April 30, 1998
    Date of Patent: April 13, 2004
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Thomas Rimhagen, Ke Wang Helmersson
  • Patent number: 6628946
    Abstract: In a cellular telecommunications system or network, tags are associated with one or more system control parameters. For example, a given tag value may be indicative of particular values for one or more system information parameters. In each cell, a base station (BS) transmits or broadcasts currently valid tag values. System information blocks including the system information parameters themselves (which correspond to particular tag(s)) are also broadcast by base stations. A mobile station receiving a valid tag value from a base station determines whether or not it has to read system information block(s) corresponding to that tag value depending upon whether the base station has already stored or cached such block(s) corresponding to the tag value. As will be appreciated by those skilled in the art, different embodiments of the instant invention may result in the mobile station not having to re-read identical system information each time it changes cells, or while moving in the same cell.
    Type: Grant
    Filed: May 18, 2000
    Date of Patent: September 30, 2003
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Niclas Wiberg, Thomas Rimhagen
  • Patent number: 6628956
    Abstract: Delays on a common radio communications channel employed by plural mobile stations to communicate with a base station located in a corresponding geographical cell area are minimized by adapting transmission power based on traffic conditions. For lower traffic loads, a higher transmission power is permitted. For higher traffic loads, a lower power level is set. A transmit power level is determined using a desired signal ratio, such as a target CIR, a transmission path loss over the radio communications channel, and an interference value. One or more adaptive power parameters are also employed in that determination to adapt the open loop power control based on one or more current communications conditions and/or characteristics of the mobile station. For example, an adaptive power parameter may be a function of a current interference in a base station cell either alone or in combination with a current interference in one or more neighboring cells.
    Type: Grant
    Filed: March 15, 1999
    Date of Patent: September 30, 2003
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Gunnar Bark, Thomas Rimhagen, Walter Müller
  • Patent number: 6594238
    Abstract: In a mobile communications system that provides packet data services, a packet data connection is established between a mobile station and a radio access network. The state of the connection specifies one of plural different types of radio channels bearing the connection over the radio interface. The connection state preferably also may specify other parameters including for example, one of plural different mobility management schemes tailored to the selected channel type or channel bit rate(s). The connection is dynamically adapted to an optimal state based on one or more conditions relating to the connection. For example, one or more traffic parameters are determined for the connection and used to predict a future value of that parameter. Based on the predicted parameter value or values, an optimal connection state is determined and implemented.
    Type: Grant
    Filed: June 19, 1998
    Date of Patent: July 15, 2003
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Bo S. P. Wallentin, Leif P. Lindskog, Thomas Rimhagen, Per O. G. Bark, Ulf A. Hansson, Harri P. Vilander
  • Patent number: 6594245
    Abstract: A method and system enables high data-rate users to be serviced even from within congested cells. If a user that is associated with an MS is located within a first cell that is too congested to provide the bandwidth requested by the user, all or a part of the information flow to/from the MS may be transceived from/to other nearby cells. For example, in a TDMA system, a user requiring three time slots per frame in order to aggregate sufficient bandwidth may be in communication with three different cells during each frame. The present invention may additionally be applied in the context of handoffs when, for example, an MS continues to be partially served by the previous cell before the new cell is able to service the high data-rate information flow. In another embodiment, the present invention may be implemented in a local wireless network environment in which multiple radio heads are controlled by a HUB.
    Type: Grant
    Filed: March 29, 1999
    Date of Patent: July 15, 2003
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Thomas Rimhagen, Magnus Frodigh
  • Publication number: 20020077138
    Abstract: Delays on a common radio communications channel employed by plural mobile stations to communicate with a base station located in a corresponding geographical cell area are minimized by adapting transmission power based on traffic conditions. For lower traffic loads, a higher transmission power is permitted. For higher traffic loads, a lower power level is set. A transmit power level is determined using a desired signal ratio, such as a target CIR, a transmission path loss over the radio communications channel, and an interference value. One or more adaptive power parameters are also employed in that determination to adapt the open loop power control based on one or more current communications conditions and/or characteristics of the mobile station. For example, an adaptive power parameter may be a function of a current interference in a base station cell either alone or in combination with a current interference in one or more neighboring cells.
    Type: Application
    Filed: March 15, 1999
    Publication date: June 20, 2002
    Inventors: GUNNAR BARK, THOMAS RIMHAGEN, WALTER MULLER
  • Patent number: 6347091
    Abstract: In a mobile communications system that provides packet data services, a packet data connection is established between a mobile station and a radio access network. The state of the connection is used to specify one of plural different types of radio channels bearing the connection over the radio interface. The connection state preferably also may specify other parameters including, for example, one of plural different mobility management schemes tailored to the selected channel type or channel bit rate(s). The connection is dynamically adapted to an optimal state based on one or more conditions relating to the connection. For example, one or more traffic parameters are determined for the connection and may be used to predict a future value of that parameter. Based on the predicted parameter value or values, an optimal connection state is determined and implemented.
    Type: Grant
    Filed: November 6, 1998
    Date of Patent: February 12, 2002
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Bo S. P. Wallentin, Leif P. Lindskog, Thomas Rimhagen, Per O. G. Bark, Ulf A. Hansson, Harri Vilander
  • Publication number: 20010016482
    Abstract: In a mobile communication network (SYS) data transmission between a radio base station (RBS) and a subscriber station (UE) is carried out by successively transmitting frames. The radio network controller (RNC) inserts at the beginning of the respective frames an indicator flag (MOP) indicating to the subscriber stations (UE) whether the frame or a succeeding frame contains data which must be read and decoded by the subscriber stations (UE). The subscriber station can by reading and decoding the indicator flag (MOP) determine that there is no necessity to read data from the present frame or a succeeding frame and can therefore use the time period of one or more frames to save network resources or to perform inter-frequency measurements on another frequency. The invention finds particular application in a WCDMA mobile communication system.
    Type: Application
    Filed: December 29, 2000
    Publication date: August 23, 2001
    Inventors: Karl Olof Joakim Bergstrom, Thomas Rimhagen