Patents Represented by Attorney Michael Cameron
  • Patent number: 7616607
    Abstract: A method ensures that data is not lost during an inter-Routing Area or inter-Network Service Entity cell change in a GPRS network. When a mobile station passes from one cell into another, a command is sent from the SGSN to the BSS serving the first cell, causing that BSS to discard any data awaiting transmission to the mobile station. A reply is sent from the BSS to the SGSN, and, in response thereto, the SGSN transmits data to the BSS serving the new cell, in order to ensure that all of the data intended for the mobile station is transmitted thereto.
    Type: Grant
    Filed: April 10, 2002
    Date of Patent: November 10, 2009
    Assignee: Telefonaktiebolaget L M Ericsson (PUBL)
    Inventors: Ann-Christine Eriksson, Sandra Collins, Ingemar Backlund
  • Patent number: 7606578
    Abstract: A method of generating a control signal to enable or inhibit a wide variety of applications is provided. The method generally includes the steps of determining the location of a first mobile radio terminal, determining the location of a second mobile radio terminal, comparing the locations of the terminals, and generating a control signal based upon the comparison. The control signal may be generated if the first and second mobile radio terminals are within a specified distance of one another. Alternatively, the control signal may be generated if the first and second mobile radio terminals are separated by at least a specified distance from one another. Additionally, the control signal may be generated if it is determined that the first mobile radio terminal is at a first specified location and the second mobile radio terminal is at a second specified location spacially separated from the first specified location.
    Type: Grant
    Filed: October 21, 2005
    Date of Patent: October 20, 2009
    Assignee: Telefonaktiebolaget L M Ericsson (Publ)
    Inventors: David R. Irvin, Ali S. Khayrallah
  • Patent number: 7587009
    Abstract: A method of estimating a transmission channel (302) comprises receiving a signal burst, which includes a sequence of training symbols; and determining (305) a desired synchronization position (p) of the training sequence with respect to the received signal burst. The method further comprises determining estimates of the transmission channel as a function of the synchronization position (p) and a size of the equalizer window (m); and determining the desired synchronization position and the size of the equalizer window by calculating an error measure based on the received signal burst and the determined estimates for selected values of the synchronization position and of the size of the equalizer window, where the values of the size of the equalizer window are selected between predetermined upper (mu) and lower (ml) bounds.
    Type: Grant
    Filed: October 31, 2003
    Date of Patent: September 8, 2009
    Assignee: Telefonaktiebolaget L M Ericsson (Publ)
    Inventor: Shousheng He
  • Patent number: 7587600
    Abstract: A method of protecting an electronic device from unauthorized reprogramming, the electronic device comprising a data memory and a key memory, the method comprising loading into the key memory a predetermined public key of a cryptographic public key mechanism for verifying subsequent data items to be loaded into the data memory, the subsequent data items being signed with a corresponding private key; characterized in that the method further comprises setting a permanent identifier in the electronic device, the permanent identifier including an identifier identifying an entity authorized to reprogram the electronic device and an indicator identifying a selected one of a number of categories of public keys.
    Type: Grant
    Filed: September 8, 2003
    Date of Patent: September 8, 2009
    Assignee: Telefonaktiebolaget L M Ericsson (Publ.)
    Inventors: Marcus Bodensjö, Harro Osthoff, Patrik Schalin, Bernard Smeets
  • Patent number: 7584293
    Abstract: The present invention relates to the information transmission rate between telecommunications nodes. More particularly the invention relates to the control of the rate at which information is transmitted between access nodes separated by a core network. The present invention provides an information rate control function adapted to authorize and/or establish a communication rate for transmission of information including: determining a plurality of maximum information transmission rates along a path of communication established between the plurality of access nodes; selecting a lowest one of the plurality of maximum information transmission rates, and; authorizing and/or establishing communication at a rate no greater than the selected lowest rate. The invention is suitable for use in the transmission of voice information to and from mobile terminals in third-generation mobile access networks across an ATM core network.
    Type: Grant
    Filed: September 8, 2000
    Date of Patent: September 1, 2009
    Assignee: Telefonaktiebolaget L M Ericsson (Publ)
    Inventors: Leslie Gary Graf, Stephen Christopher Terrill, Christian Norman Groves, Mark Alan Hollis, Juan Noguera-Rodriguez, Ian Rytina
  • Patent number: 7583760
    Abstract: Method of, and arrangement and device for, decoding a communications signal in a digital communications system, where the communications signal is modulated according to a modulation scheme including amplitude information; generating a likelihood value for a received communications signal, decoding the communications signal based on at least the generated likelihood value, providing a reliability indication of the amplitude information conveyed by the received communications signal wherein the step of generating the likelihood value further comprises generating the likelihood value on the basis of the provided reliability indication of the amplitude information.
    Type: Grant
    Filed: October 9, 2003
    Date of Patent: September 1, 2009
    Assignee: Telefonaktiebolaget L M Ericsson (Publ)
    Inventors: Bo Bernhardsson, Bengt Lindoff, Peter Malm
  • Patent number: 7584471
    Abstract: Method and system for extending and/or modifying functionality of a platform for a product, such as a mobile terminal for a wireless telecommunications system. The system includes a platform domain having a software services component for providing functionality, and an interface component having at least one interface for providing access to the software services component for enabling application software to be installed, loaded and run in said platform via the at least one interface. The system also includes plug-in software for use together with the application software for extending and/or modifying the functionality of the software services component of the platform domain via the at least one interface.
    Type: Grant
    Filed: September 19, 2003
    Date of Patent: September 1, 2009
    Assignee: Telefonaktiebolaget L M Ericsson (Publ)
    Inventors: Björn Bjäre, Chi Thu Le, Jonas Hansson, Henrik Svensson, Mikael Danielsson
  • Patent number: 7583155
    Abstract: A device for generating a random sequence (10) of bits is disclosed. The device comprises oscillating means (13), which will generate a random sequence of bits when biased with a noise signal. The oscillating means comprises at least one oscillator amplifier being protected from interfering signals by means of a load and a tail-current source for providing high noise-interference ratio. Further, the present invention relates to an integrated circuit and an electronic apparatus comprising the device for generating a random sequence according to the invention.
    Type: Grant
    Filed: March 19, 2004
    Date of Patent: September 1, 2009
    Assignee: Telefonaktiebolaget L M Ericsson (PUBL)
    Inventor: Sven Mattisson
  • Patent number: 7558953
    Abstract: Disclosed is a method of loading data, such as software, into a mobile terminal, where the data is loaded from a loading station, and the data comprises payload data and header data. The mobile terminal accepts the data conditioned on a verification process based on the header data. The step of receiving the data further comprises the steps of receiving a header message including the header data from the loading station by the mobile terminal, verifying the received header data by the mobile terminal, and receiving at least a first payload message including the payload data, if the header data is verified successfully.
    Type: Grant
    Filed: December 20, 2002
    Date of Patent: July 7, 2009
    Assignee: Telefonaktiebolaget L M Ericsson (Publ)
    Inventors: Harro Osthoff, Bernard Smeets, Christian Gehrmann
  • Patent number: 7558573
    Abstract: A communication system supports multiple source coding and/or channel coding schemes. When a handoff is needed that transfers radiocommunication service support responsibility from a base station controlled by one MSC to a base station controlled by another MSC, signaling procedures are employed to handle the transfer as it pertains to the source coding and/or channel coding, i.e., ensuring that the new MSC links in an appropriate codec to support the handed off connection. Various techniques are described to provide such signaling, both in the direction of the new (target) MSC and in the direction of the user equipment being handed off.
    Type: Grant
    Filed: September 14, 2004
    Date of Patent: July 7, 2009
    Assignee: Telefonaktiebolaget L M Ericsson (Publ.)
    Inventors: Martin Stüempert, Phil Hodges
  • Patent number: 7558314
    Abstract: The present invention relates to a method (and corresponding device) of detecting a first signal in a received signal using a pattern, the received signal comprising at least one signal group, each signal group comprising a number of signal symbols, the pattern comprising at least one pattern group, each pattern group comprising at least a number of pattern symbols, wherein the method comprises the steps of for each signal group multiplying each signal symbol with a corresponding pattern symbol of a pattern group and deriving a sum of the products of multiplication, applying a weight factor of one or more weight factors to each sum giving a weighted sum, where said one or more weight factors are selected to preserve an orthogonality relation of said pattern symbols of the least one pattern group, and determining if a signal is detected or not based on said one or more weighted sums.
    Type: Grant
    Filed: August 29, 2003
    Date of Patent: July 7, 2009
    Assignee: Telefonaktiebolaget L M Ericsson (Publ)
    Inventor: Elias Jonsson
  • Patent number: 7555077
    Abstract: A method for adaptively scheduling activation of a path-searcher for a mobile terminal operative in a telecommunication system. The mobile terminal is capable of receiving multi-path signals originating from a scattered signal from a transmitter of at least one base station in the telecommunication system. The time lag between consecutive path-searcher activations is according to the method determined based on a value of the power delay profile discrepancy between two consecutive power delay profiles. The power delay profiles are derived from at least a subset of the powers of signals received at different delays during the path-searcher activation.
    Type: Grant
    Filed: August 23, 2003
    Date of Patent: June 30, 2009
    Assignee: Telefonaktiebolaget L M Ericsson (Publ)
    Inventor: Elias Jonsson
  • Patent number: 7555079
    Abstract: A method of determining a DC offset in a communications signal received via a communications channel, the communications signal comprising a sequence of training symbols. The method comprises providing a channel estimate of the communications channel based on said sequence of training symbols; determining, based on the channel estimate, an estimate of a noise contribution introduced by the communications channel; and determining an estimate of the DC offset from the determined estimate of the noise contribution.
    Type: Grant
    Filed: October 9, 2003
    Date of Patent: June 30, 2009
    Assignee: Telefonaktiebolaget L M Ericsson (Publ)
    Inventor: Shousheng He
  • Patent number: 7536181
    Abstract: A platform system for a mobile terminal for a wireless telecommunications system. The platform system comprises a mobile terminal platform assembly including a software services component having a plurality functional software units, a hardware component having a plurality of hardware units associated with and controlled by the plurality of functional software units, and an interface component having at least one interface for providing access to the mobile terminal platform assembly. The platform system further includes application software loaded, installed and run in said mobile terminal platform assembly via the at least one interface of the interface component. The mobile terminal platform assembly is adapted to be manufactured as a unit and transferred to a user who then loads, installs and runs the application software in the assembly to provide the platform system.
    Type: Grant
    Filed: February 7, 2003
    Date of Patent: May 19, 2009
    Assignee: Telefonaktiebolaget L M Ericsson (Publ)
    Inventors: Torbjörn Sölve, Sebastian Weber, Johan Svenér, Bernd Möller, Bernard Smeets, Matthias Esswein, Michael Bock, Elmar Kirchner, Jan Lind, Rikard Dahlman, Björn Bjäre
  • Patent number: 7526745
    Abstract: A hardware-block constraint specification method includes defining a plurality of hardware-block constraint categories according to at least one of type of constraint and constraint operating mode and defining a plurality of hardware-block constraint commands. Each of the plurality of hardware-block constraint commands is categorized into one of the plurality of hardware-block constraint categories. The method also includes encapsulating the plurality of hardware-block constraint commands within a plurality of modules usable, via an application programming interface, in a stand-alone mode or an integrated mode.
    Type: Grant
    Filed: December 5, 2005
    Date of Patent: April 28, 2009
    Assignee: Telefonaktiebolaget L M Ericsson (Publ)
    Inventor: Mario Vergara-Escobar
  • Patent number: 7526301
    Abstract: Method, devices and computer programs for routing a message to a first network server (MSC1) in a server pool (CNSP) of a mobile communication system are disclosed. The mobile communication system comprises a controller (BSC2) of an access network (AN) connectable to the first network server (MSC1) and at least one further network server (MSC2) in the server pool (CNSP), wherein service points are defined (S100) and one or more of the service points are allocated (S110) uniquely to each of the network servers (MSC1, MSC2) in the server pool (CNSP). At least one of the network servers (MSC1, MSC2) has allocated (S110) at least two of the service points. A temporary identity is assigned (S150) by the first network server (MSC1) to a mobile device (MS). The temporary identity includes a selected service point which is selected (S140) from the one or more service points allocated to the first network server (MSC1).
    Type: Grant
    Filed: December 13, 2006
    Date of Patent: April 28, 2009
    Assignee: Telefonaktiebolaget L M Ericsson (Publ)
    Inventors: Aitor Artola, Aldo Baserga, Mauro Bellora, Klaus Turina
  • Patent number: 7511586
    Abstract: A device for generating a noise signal, which may be used for generating a truly random sequence (10) of bits is disclosed. The device comprises a noise source (11), and an amplifier (12) connected to the noise source (11). The device according noise source according to the invention is protected from interfering signals to provide high noise-interference ratio. Further, the present invention relates to an integrated circuit and an electronic apparatus comprising the device for generating a noise signal according to the invention.
    Type: Grant
    Filed: March 19, 2004
    Date of Patent: March 31, 2009
    Assignee: Telefonaktiebolaget L M Ericsson (PUBL)
    Inventor: Sven Mattisson
  • Patent number: 7502930
    Abstract: A method of providing secure communications between a first and a second communications unit comprising a key exchange between the communications units resulting in a shared secret key, the? key exchange including a user interaction. The method includes the steps of providing, at least partly by means of a user interaction, a passcode to the first and second communications units; generating a first contribution to the shared secret key by the first communications unit and a second contribution to the shared secret key by the second communications unit, and transmitting each generated contribution to the corresponding other communications unit; authenticating the transmitted first and second contributions by the corresponding receiving communications unit based on at least the passcode: and establishing said shared secret key by each of the communications units from at least the corresponding received first or second contribution, only if the corresponding received contribution is authenticated successfully.
    Type: Grant
    Filed: August 22, 2007
    Date of Patent: March 10, 2009
    Assignee: Telefonaktiebolaget L M Ericsson (Publ)
    Inventor: Christian Gehrmann
  • Patent number: 7480342
    Abstract: A sub-optimal method is disclosed for calculating the reliability values (soft values) for the bits of a multilevel signal. The log-likelihood values are approximated using only the dominant terms, so called max-log approximation, that is for each bit position only the two closest signal symbols of opposite bit value (S8, S6) are considered in the sum. The used modulation scheme is 16-QAM together with Gray-labelling. Two versions of approximation are proposed: one version consists of using the two distances between the received value and the two closest symbols of opposite bit value (?1 ?2 ). In order to simplify and speed up the calculation, the second version consists of using the distance between the two closest symbols (?3 ) to approximate the distance between the second closest symbol and the received value. Furthermore, precalculated results are stored in look-up tables to speed up the calculation.
    Type: Grant
    Filed: February 26, 2003
    Date of Patent: January 20, 2009
    Assignee: Telefonaktiebolaget L M Ericsson (Publ)
    Inventors: Leif Wilhelmsson, Peter Malm
  • Patent number: 7480356
    Abstract: A signal-path-selection method in a RAKE receiver includes producing C channel estimates from M received signal paths, determining a plurality of best signal paths using the C produced channel estimates, choosing A signal paths of the plurality of best signal paths in accordance with at least one pre-determined criterion, and combining the A signal paths. C is a measure of channel-estimation capacity of the RAKE receiver. M is greater than C. This Abstract is provided to comply with rules requiring an Abstract that allows a searcher or other reader to quickly ascertain subject matter of the technical disclosure. This Abstract is submitted with the understanding that it will not be used to interpret or limit the scope or meaning of the claims. 37 CFR 1.72(b).
    Type: Grant
    Filed: December 8, 2004
    Date of Patent: January 20, 2009
    Assignee: Telefonaktiebolaget L M Ericsson (PUBL)
    Inventor: Andres Reial