Patents by Inventor Jacobus Cornelis Haartsen

Jacobus Cornelis Haartsen 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: 20090215450
    Abstract: The invention relates to a technique of performing a random access procedure over a radio interface (106) in a mobile terminal (102). A method embodiment or the random access procedure as performed in the mobile terminal comprises the steps of selecting an access time slot for transmission of an access burst (112) over the radio interface; and setting an access bandwidth for transmission of the access burst, wherein the access bandwidth is set smaller than an available transmission bandwidth associated with the radio interface.
    Type: Application
    Filed: October 20, 2006
    Publication date: August 27, 2009
    Applicant: TELEFONAKTIEBOLAGET LM ERICSSON (pub)
    Inventors: Robert Baldemaier, Maria Edvardsson, Erik Dahlman, Jacobus Cornelis Haartsen, Stefan Parkvall
  • Patent number: 7580683
    Abstract: An entire radio transceiver can be completely integrated into one IC chip. In order to integrate the IF filters on the chip, a heterodyne architecture with a low IF is used. A single, directly modulated VCO is used for both up-conversion during transmission, and down-conversion during reception. Bond-wires are used as resonators in the oscillator tank for the VCO. A TDD scheme is used in the air interface to eliminate cross-talk or leakage. A Gaussian-shaped binary FSK modulation scheme is used to provide a number of other implementation advantages.
    Type: Grant
    Filed: January 27, 2005
    Date of Patent: August 25, 2009
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Karl Håkan Torbjörn Gärdenfors, Sven Mattisson, Jacobus Cornelis Haartsen
  • Publication number: 20090196209
    Abstract: A device may include logic to enter a power savings mode and wirelessly transmit a first synchronization packet to a remote device within a first transmission time slot in a first power savings cycle, the first synchronization packet including a code that is a member of a set consisting of a predetermined number of codes. In addition, the logic may be configured to sleep after transmitting the first synchronization packet to save energy, awake at a first receive time slot in the first power savings cycle, and receive a reply synchronization packet, the reply synchronization packet including a code is that is a member of the set from the remote device. The logic may be further configured to sleep until a start of a second power savings cycle that follows the first power savings cycle to save energy.
    Type: Application
    Filed: February 4, 2008
    Publication date: August 6, 2009
    Applicant: SONY ERICSSON MOBILE COMMUNICATIONS AB
    Inventor: Jacobus Cornelis HAARTSEN
  • Publication number: 20090141700
    Abstract: The invention relates to a technique for performing a random access procedure over a radio interface, for example between a mobile terminal and a radio base station of a mobile network, A method aspect of the invention comprises the steps of transmitting a synchronization request for synchronization information; receiving synchronization information in response to the synchronization request; and transmitting, based on at least one transmission parameter adjusted in accordance with the synchronization information, a resource request for data transmission resources.
    Type: Application
    Filed: October 20, 2006
    Publication date: June 4, 2009
    Inventors: Robert Baldemair, Maria Edvardsson, Erik Dahlman, Jacobus Cornelis Haartsen, Stefan Parkvall
  • Patent number: 7522689
    Abstract: In a frequency hopped wireless network, more robust method and system are disclosed for recovering clock synchronization. The method and system of the invention relies on the fact that correct decoding of a received packet occurs only when the same clock value is used to generate the decoding sequence at both the sender and the receiver. Several decoding sequences are tried based on different clock values to decode the packet. The different clock values used may be adjacent or nearby an initial estimated clock value. The clock value of the first decoding sequence to result in a correctly decoded packet is taken as the proper clock value for synchronization. Correct decoding is determined by checking the CRC of the packet.
    Type: Grant
    Filed: September 23, 2002
    Date of Patent: April 21, 2009
    Assignee: Telefonaktiebolaget L M Ericsson (Publ)
    Inventor: Jacobus Cornelis Haartsen
  • Publication number: 20090073870
    Abstract: This disclosure relates to frequency hopping (FH) communication systems, such as Bluetooth. In particular, it relates to a substantially automatic recovery procedure for re-establishing a previously lost link or connection between a master unit and a slave unit in a frequency hopping communications system. Some embodiments of the disclosed invention relates to methods for recovery of a previously lost link or connection between two Bluetooth units in a Bluetooth Sniff mode.
    Type: Application
    Filed: December 11, 2007
    Publication date: March 19, 2009
    Applicant: SONY ERICSSON MOBILE COMMUNICATIONS AB
    Inventors: Jacobus Cornelis HAARTSEN, Geert Hendrik WEINANS
  • Publication number: 20090067542
    Abstract: This invention relates to a system, terminals, and a method of communicating broadcast information where broadcast information comprising at least two parts is transmitted to at least one communications terminal. The transmission comprises transmitting the broadcast information during at least a first time instance, and where the transmission further comprises transmitting incremental broadcast information during a time instance being different than the first time instance. In this way, by sending the broadcast information in increments, i.e. incrementally, it is ensured that terminals capable of it (due to better capabilities like higher information rate, greater bandwidth, etc. and/or due to better location like near the base station, having favorable propagation conditions, having line-of-sight to the base station, etc.
    Type: Application
    Filed: December 5, 2006
    Publication date: March 12, 2009
    Applicant: TELEFONAKTIEBOLAGET L M ERICSSON (PUBL)
    Inventor: Jacobus Cornelis Haartsen
  • Publication number: 20090067355
    Abstract: Methods and apparatus are disclosed for reducing mobile terminal energy consumption during data transmissions by allocating link resources and adapting link parameters in an energy-aware manner, based on throughput requirements and prevailing channel conditions. A combination of transmit parameters that includes a transmit channelization scheme and is designed to minimize the total energy consumed during data transmission is selected based on a throughput requirement and one or more channel conditions associated with the data transmission. The channelization scheme includes a number of subchannels to be used and subchannel configuration parameters for each subchannel, such as spreading codes, spreading factors, and subchannel power levels. The combination of transmit parameters may also include a modulation format, coding scheme, and transmit power setting, as well as parameters relating to multiple-antenna transmit schemes.
    Type: Application
    Filed: September 12, 2007
    Publication date: March 12, 2009
    Inventors: Jacobus Cornelis Haartsen, Bengt Lindoff, Anders Wallen
  • Publication number: 20090069057
    Abstract: Methods and apparatus are disclosed for reducing mobile terminal energy consumption during data transmissions by allocating resources and adapting link parameters in an energy-aware manner, based on throughput requirements and prevailing signal propagation conditions. A combination of transmit parameters designed to minimize the total energy consumed during data transmission is selected based on a throughput requirement and a path loss associated with a data transmission by a mobile terminal. The combination of transmit parameters includes a bandwidth allocation and may also include a modulation format, coding scheme, and transmit power setting, as well as parameters relating to multiple-antenna transmit schemes. The bandwidth allocation may correspond to a number of sub-carriers of an OFDM signal, or may correspond to a number of resource blocks in an SC-FDMA signal.
    Type: Application
    Filed: September 11, 2007
    Publication date: March 12, 2009
    Inventors: Jacobus Cornelis Haartsen, Bengt Lindoff, Anders Wallen
  • Publication number: 20090068969
    Abstract: Methods and apparatus are disclosed for operating a multi-mode wireless communications device to select a radio access technology (RAT) requiring the lowest energy consumption by the device for a desired operating mode. An exemplary method comprises scanning a plurality of frequency bands to determine a set of available radio access technologies that support the desired operating mode, and evaluating, for each available RAT, RAT-specific system parameters and RAT-specific operating conditions. Based on the evaluation, the RAT requiring the lowest energy consumption by the wireless device for the desired operating mode is selected.
    Type: Application
    Filed: September 10, 2007
    Publication date: March 12, 2009
    Inventors: Bengt Lindoff, Jacobus Cornelis Haartsen, Anders Wallen
  • Publication number: 20080182574
    Abstract: A device that uses Ultra-Wideband modulation techniques is operated in a low duty cycle mode in which an amount of time during which the device is permitted to transmit a signal is limited. In response to ascertaining that a high-throughput service is to be performed, the device operates in a detect and avoid mode in which it is permitted to transmit continuously on a selected frequency band at a maximum output power until a victim service is detected operating on the selected frequency band. In response to a victim service being detected, the device is again operated in the low duty cycle mode while attempting to identify another frequency band in which to operate the device in the detect and avoid mode. Measures can be taken to maintain a comparable QoS in LDC mode while the device searches for a new DAA mode frequency band.
    Type: Application
    Filed: March 21, 2007
    Publication date: July 31, 2008
    Applicant: TELEFONAKTIEBOLAGET L M ERICSSON (PUBL)
    Inventor: Jacobus Cornelis Haartsen
  • Publication number: 20080159183
    Abstract: A first transceiver in a packet-based communications system is operated to achieve efficiencies. The transceiver comprises a receiver and a transmitter for bidirectionally communicating with a second transceiver. In various embodiments, data and control traffic scheduling enables several unrelated items to be bundled during single transmission and/or reception instances. In one aspect, receiver operation involves receiving a first signal from the second transceiver, the first signal requiring that return link information be sent to the second transceiver. A period of time during which the first transceiver can begin a bundled transmission of the return link information and initiating link information that is unrelated to the information carried by the first signal is determined. The bundled transmission of the initiating and return link information is begun during the determined period of time.
    Type: Application
    Filed: May 31, 2007
    Publication date: July 3, 2008
    Applicant: TELEFONAKTIEBOLAGET L M ERICSSON (PUBL)
    Inventors: Bengt Lindoff, Jacobus Cornelis Haartsen
  • Publication number: 20080153431
    Abstract: A transceiver is operated in a cellular communications system, wherein the transceiver has a variable transmitter output power that spans a range of power levels comprising a low-power domain and a high-power domain. Operation includes determining whether the transmitter output power of the transceiver is in the low-power domain or the high-power domain. If the transmitter output power of the transceiver is in the low-power domain, then transceiver operation is initiated in a full-duplex mode in which transmitted and received signals pass through a duplexer associated with a transceiver antenna. If the transmitter output power of the transceiver is in the high-power domain, then transceiver operation is initiated in a half-duplex mode and bypassing the duplexer.
    Type: Application
    Filed: September 14, 2007
    Publication date: June 26, 2008
    Inventors: Jacobus Cornelis Haartsen, William Camp
  • Publication number: 20080075191
    Abstract: A single-carrier signal is generated from a number, N, of symbols in a way that results in a low PAPR. This includes generating an initial set of N complex frequency components from the N symbols. Ns different sets of N complex frequency components are generated by, for each of Ns times, permuting the initial set of N complex frequency components by one of Ns possible permutations. Ns different sets of M complex frequency components are generated by mapping each of the Ns different sets of N complex frequency components onto a set of M carrier frequencies. After shaping, an IDFT generates a candidate set of N time-domain symbols from each of the Ns different sets of M complex frequency components. That one of the Ns different candidate sets of N time-domain symbols that is associated with the smallest PAPR is selected for further processing.
    Type: Application
    Filed: March 12, 2007
    Publication date: March 27, 2008
    Applicant: TELEFONAKTIEBOLAGET L M ERICSSON (PUBL)
    Inventor: Jacobus Cornelis Haartsen
  • Patent number: 7313123
    Abstract: A system and method for resource management and traffic control in time division duplex communication systems. A multi-radio base station maintains communication links with a plurality of remote terminals, each of which requests a specific bandwidth ratio. A controller analyzes the requested bandwidth ratios and allocates slots in the base station radios according to a packing scheme that synchronizes the transmission and receive timing of the multiple base station radios communication links. The resource management and traffic control techniques may be applied to a variety of communication devices communicating over a variety of interfaces, such as WLAN or a BLUETOOTH short range communications technology interface. Furthermore, the techniques can be employed with devices communicating with two or more remote devices via different interfaces.
    Type: Grant
    Filed: June 6, 2003
    Date of Patent: December 25, 2007
    Assignee: Telefonaktiebolaget L M Ericsson (publ)
    Inventor: Jacobus Cornelis Haartsen
  • Patent number: 7272078
    Abstract: A representative measurement indicating a relative oscillation speed of a reference clock during a representative calibration period is ascertained. Multiple calibration periods are defined including first and second calibration periods. The first calibration period begins at a first start time, wherein a first time offset value is equal to a difference between the first start time and a transition point of the reference clock signal within the first calibration period. The second calibration period begins at a second start time, wherein a second time offset value is equal to a difference between the second start time and a transition point of the reference clock signal within the second calibration period. The first and second time offset values are different from one another. Measurements are generated by, for each one of the calibration periods, measuring the speed of the reference clock. The measurements are then averaged.
    Type: Grant
    Filed: October 12, 2006
    Date of Patent: September 18, 2007
    Assignee: Telefonaktiebolaget L M Ericsson (publ)
    Inventor: Jacobus Cornelis Haartsen
  • Patent number: 7269144
    Abstract: An entire radio transceiver can be completely integrated into one IC chip. In order to integrate the IF filters on the chip, a heterodyne architecture with a low IF is used. A single, directly modulated VCO is used for both up-conversion during transmission, and down-conversion during reception. Bond-wires are used as resonators in the oscillator tank for the VCO. A TDD scheme is used in the air interface to eliminate cross-talk or leakage. A Gaussian-shaped binary FSK modulation scheme is used to provide a number of other implementation advantages.
    Type: Grant
    Filed: November 11, 2005
    Date of Patent: September 11, 2007
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Karl Håkan Torbjörn Gärdenfors, Sven Mattisson, Jacobus Cornelis Haartsen
  • Patent number: 7180903
    Abstract: A method and apparatus for communication using a plurality of time slots within a frequency spectrum is described. A fast frequency hopping traffic channel having a set of the plurality of time slots and a first set of hop carrier frequencies is established between a first and a second communication unit. A slow frequency hopping traffic channel having a second set of hop carrier frequencies is established between a third and fourth communication unit.
    Type: Grant
    Filed: September 21, 2000
    Date of Patent: February 20, 2007
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventor: Jacobus Cornelis Haartsen
  • Patent number: 7149191
    Abstract: An entire radio transceiver can be completely integrated into one IC chip. In order to integrate the IF filters on the chip, a heterodyne architecture with a low IF is used. A single, directly modulated VCO is used for both up-conversion during transmission, and down-conversion during reception. Bond-wires are used as resonators in the oscillator tank for the VCO. A TDD scheme is used in the air interface to eliminate cross-talk or leakage. A Gaussian-shaped binary FSK modulation scheme is used to provide a number of other implementation advantages.
    Type: Grant
    Filed: July 24, 2003
    Date of Patent: December 12, 2006
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Karl Håkan Torbjörn Johansson-Gardenfors, Sven Mattisson, Jacobus Cornelis Haartsen
  • Patent number: 7068171
    Abstract: An entire radio transceiver can be completely integrated into one IC chip. In order to integrate the IF filters on the chip, a heterodyne architecture with a low IF is used. A single, directly modulated VCO is used for both up-conversion during transmission, and down-conversion during reception. Bond-wires are used as resonators in the oscillator tank for the VCO. A TDD scheme is used in the air interface to eliminate cross-talk or leakage. A Gaussian-shaped binary FSK modulation scheme is used to provide a number of other implementation advantages.
    Type: Grant
    Filed: April 12, 2004
    Date of Patent: June 27, 2006
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Karl Håkan Torbjörn Gärdenfors, Sven Mattisson, Jacobus Cornelis Haartsen