Patents by Inventor Stefan Eriksson

Stefan Eriksson 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: 20090279587
    Abstract: First and second groups of mobile terminal communications in a cell are defined. A basic frequency hopping sequence for both groups is identified. An offset from the basic hopping sequence is determined for each mobile terminal communication in the first and second groups and is used along with the basic frequency hopping sequence to generate an assigned frequency hopping sequence for each mobile terminal. Some of the assigned frequency hopping sequences overlap such that a first communication from the first group and a second communication from the second group simultaneously use the same time-frequency radio resource during one hop in their corresponding assigned frequency hopping sequences.
    Type: Application
    Filed: December 30, 2008
    Publication date: November 12, 2009
    Applicant: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Stefan Eriksson, Miguel Lopez, Marten Sundberg
  • Publication number: 20090042572
    Abstract: The invention relates to a handover or cell change procedure in a cellular radio communications system comprising a mobile user terminal present in a serving cell and having multiple radio resources simultaneously allocated for communication with a base station of the cell. In this procedure, when there is a need for a cell change, the multiple radio resources are sequentially replaced with radio resources allocated to the terminal for communication with at least one base station having an associated cell different from the serving cell. This cell change procedure provides macro diversity without requiring the complexity of soft handovers and has enhanced service coverage and handover robustness compared to hard handover.
    Type: Application
    Filed: April 18, 2006
    Publication date: February 12, 2009
    Inventors: Stephen Craig, Stefan Eriksson
  • Patent number: 7471928
    Abstract: The invention involves selection of modulation scheme for a mobile unit (100) having access to a link quality enhancing algorithm (130) operable only on data modulated using a subset of the available modulation schemes. The mobile unit (100) performs signal quality measurements on a communications link (410), over which data modulated with a first modulation scheme is communicated. A link quality measure is then determined for this first modulation. A quality enhancement due to operation of the algorithm (130) is also determined. This quality measure and the quality enhancement are used for generating decision information, which is reported to the network (200). There the information is used for estimating link quality measure(s) of currently non-employed modulation(s) for the mobile unit (100). The selection of a modulation scheme for the communications link is then performed based on the decision information and the estimated quality measure(s).
    Type: Grant
    Filed: June 1, 2004
    Date of Patent: December 30, 2008
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Johan Axnas, Stephen Craig, Dayong Chen, Stefan Eriksson
  • Patent number: 7424405
    Abstract: The invention refers to a method and an arrangement for signal processing for a target detecting device (1) where a return signal (8) is divided into two parallel branches where a first compression filter (15) compresses the signal in the first branch and where a second compression filter (17) compresses the signal in the second branch. The second compression filter (17) compresses the return signal (8) to a higher degree than the first compression filter (15). A delay filter (19) delays the first compressed signal (16a) compensating for a delay ?T. Detectors (21, 22) processes the compressed signals (16b, 18) giving rise to detector signals (21, 23). The detector signals are compared and the minimum value of the compared detector signals (21, 23) is selected for all time frames, giving rise to a first output signal (25) comprising the minimum values from the first and second detector signals (21, 23).
    Type: Grant
    Filed: December 16, 2003
    Date of Patent: September 9, 2008
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventor: Stefan Eriksson
  • Publication number: 20080025266
    Abstract: A method and apparatus for determining the content in bursts to be transmitted from a base station in a mobile network on a broadcast frequency in specific timeslots of a broadcast frequency frame structure. A current state of the logical channel allocated to the forthcoming burst is checked, and the content in the forthcoming burst is determined depending on the current channel state. A dummy burst with a base station specific training sequence is transmitted if there is no data to transmit, and if the dummy burst cannot be confused with a regular traffic burst according to the current channel state. The dummy burst contains no intelligible information to mobile terminals.
    Type: Application
    Filed: December 18, 2003
    Publication date: January 31, 2008
    Inventors: Tobias Tynderfeldt, Stephen Craig, Ari Kangas, Stefan Eriksson
  • Publication number: 20070080853
    Abstract: The invention refers to a method and an arrangement for signal processing for a target detecting device (1) where a return signal (8) is divided into two parallel branches where a first compression filter (15) compresses the signal in the first branch and where a second compression filter (17) compresses the signal in the second branch. The second compression filter (17) compresses the return signal (8) to a higher degree than the first compression filter (15). A delay filter (19) delays the first compressed signal (16a) compensating for a delay ?T. Detectors (21, 22) processes the compressed signals (16b, 18) giving rise to detector signals (21, 23). The detector signals are compared and the minimum value of the compared detector signals (21, 23) is selected for all time frames, giving rise to a first output signal (25) comprising the minimum values from the first and second detector signals (21, 23).
    Type: Application
    Filed: December 16, 2003
    Publication date: April 12, 2007
    Inventor: Stefan Eriksson
  • Patent number: 7188300
    Abstract: Flexibly configurable layer one transport channels produce radio blocks in response to communication information and extract communication information from radio blocks. Each transport channel can include an encoder or a decoder coupled to and cooperable with a data puncturer or a data repeater. An information source can produce for each transport channel first configuration information and second configuration information, wherein the first configuration information is indicative of how the associated transport channel is to be configured if a first modulation type is used for a current radio block, and wherein the second configuration information is indicative of how the associated transport channel is to be configured if a second modulation type is used for the current radio block. The physical layer can include a description information source that provides description information from which various configurations of the transport channels can be determined.
    Type: Grant
    Filed: April 26, 2002
    Date of Patent: March 6, 2007
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Stefan Eriksson, Arne Berglund, David Bladsjo
  • Patent number: 7164890
    Abstract: A network node (28) of a wireless telecommunication network (20) uses a first coding scheme (selected from plural possible coding schemes) for encoding of a point-to-multipoint (PTM) transmission carried to plural mobile stations (30) on a common downlink channel (32). The mobile stations (30) receiving the point-to-multipoint transmission on the common downlink channel (32) evaluate the link quality of the point-to-multipoint transmission. Feedback from the plural mobile stations (30) regarding the link quality of the point-to-multipoint transmission is provided to the network node (28) on a common uplink channel (36). A controller (48) at the network node (28) monitors information received on the common uplink channel for feedback regarding the link quality of the point-to-multipoint transmission.
    Type: Grant
    Filed: November 21, 2003
    Date of Patent: January 16, 2007
    Assignee: Telefonaktiebologet LM Ericsson (publ)
    Inventors: Stefan Eriksson, Hannes Ekstroem, Andreas Schieder, Henning Wiemann
  • Patent number: 7150473
    Abstract: Method and arrangement for providing a coupling device for conduits of pressurized media which consists of (includes) at least two coupling parts (1, 2) that are possible to couple to each other in the shape of a female part and a male part which is insertable into the female part. A locking device is arranged to hold the coupling parts completely coupled in a locking position. The locking device comprises a locking member (11) positioned at one of the coupling parts (2) which in a locking position attaches into a recess (12) in the other coupling part. A sealing member (6) in the locking position achieves sealing between the coupling parts. The other coupling part (1) exhibits a further recess (16) in which the locking member can be brought to locking of the coupling parts (1, 2) in an outer locking position when the two coupling parts are coupled to each other.
    Type: Grant
    Filed: May 15, 2004
    Date of Patent: December 19, 2006
    Assignee: Volvo Lastvagnar AB
    Inventors: Mats Sandborn, Stefan Eriksson
  • Patent number: 7103020
    Abstract: Flexibly configurable layer one transport channels produce radio blocks in response to communication information and extract communication information from radio blocks. One of the transport channels can be enabled to extract its associated communication information from a radio block while another of the transport channels is maintained disabled. The one transport channel provides the extracted communication information to a decision maker in a higher layer. In response to the extracted communication information, the decision maker decides whether the other transport channel should be enabled, and provides to the physical layer an indication of its decision.
    Type: Grant
    Filed: April 26, 2002
    Date of Patent: September 5, 2006
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Stefan Eriksson, Arne Berglund, David Bladsjo
  • Publication number: 20050113099
    Abstract: A network node (28) of a wireless telecommunication network (20) uses a first coding scheme (selected from plural possible coding schemes) for encoding of a point-to-multipoint (PTM) transmission carried to plural mobile stations (30) on a common downlink channel (32). The mobile stations (30) receiving the point-to-multipoint transmission on the common downlink channel (32) evaluate the link quality of the point-to-multipoint transmission. Feedback from the plural mobile stations (30) regarding the link quality of the point-to-multipoint transmission is provided to the network node (28) on a common uplink channel (36). A controller (48) at the network node (28) monitors information received on the common uplink channel for feedback regarding the link quality of the point-to-multipoint transmission.
    Type: Application
    Filed: November 21, 2003
    Publication date: May 26, 2005
    Applicant: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Stefan Eriksson, Hannes Ekstroem, Andreas Schieder, Henning Wiemann
  • Patent number: 6865233
    Abstract: Control signalling for systems employing link adaptation and incremental redundancy is described. A link adaptation/incremental redundancy message can be transmitted from a receiving entity to a transmitting entity to inform the transmitting entity of the receiving entity's incremental redundancy status or preference. Another message, which indicates whether resegmentation should be performed for retransmitted blocks can also be transmitted from a receiving entity to a transmitting entity. Both of these messages can be used by the transmitting entity to determine an appropriate modulation/coding scheme for subsequent transmissions of both original data blocks and retransmitted data blocks. The messages can be used together or independently in either link (uplink or downlink) between a base station and a mobile station in a radiocommunication system.
    Type: Grant
    Filed: February 19, 1999
    Date of Patent: March 8, 2005
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Stefan Eriksson, Anders Furuskär, Stefan Jäverbring, Mattias Wallman
  • Publication number: 20050017504
    Abstract: Method and arrangement for providing a coupling device for conduits of pressurized media which consists of (includes) at least two coupling parts (1, 2) that are possible to couple to each other in the shape of a female part and a male part which is insertable into the female part. A locking device is arranged to hold the coupling parts completely coupled in a locking position. The locking device comprises a locking member (11) positioned at one of the coupling parts (2) which in a locking position attaches into a recess (12) in the other coupling part. A sealing member (6) in the locking position achieves sealing between the coupling parts. The other coupling part (1) exhibits a further recess (16) in which the locking member can be brought to locking of the coupling parts (1, 2) in an outer locking position when the two coupling parts are coupled to each other.
    Type: Application
    Filed: May 15, 2004
    Publication date: January 27, 2005
    Applicant: Volvo Lastvagnar
    Inventors: Mats Sandborn, Stefan Eriksson
  • Patent number: 6705839
    Abstract: In a device and a method for controlling an oiled air compressor (1), which is included in a compressed-air system (2) for a motor vehicle and which is driven by the engine (3) of the motor vehicle and supplies compressed air to at least one consumer (12) in the compressed-air system (2), provision is made of, on the one hand, a control unit (14) for controlling the function of the air compressor (1) by activating the air compressor at a lower predetermined pressure level (P1) for charging the compressed-air system and deactivating the same at a higher predetermined pressure level (P2) for relieving the air compressor, and, on the other, a drainage unit (17), which in connection with the activation of the air compressor (1) drains pollutants, which have accumulated in the air compressor during the deactivation, before the air compressor is allowed to start charging the compressed-air system (2).
    Type: Grant
    Filed: April 5, 2001
    Date of Patent: March 16, 2004
    Assignee: Volvo Lastvagnar AB
    Inventor: Stefan Eriksson
  • Patent number: 6604216
    Abstract: A wireless communications system, transmitter, receiver and method are provided that are capable of supporting incremental redundancy error handling schemes using available gross rate channels. More specifically, the transmitter includes a coding circuit for coding a digital data block and generating a mother code word, and a reordering circuit for reordering the mother code word and generating a reordered mother code word. The transmitter also includes a modulating circuit for modulating at least one subsequence each of which has a desired number of bits taken from the reordered mother code word to fill the available bandwidth of at least one available gross rate channel. The transmitter continues to forward the modulated subsequences to the receiver until the receiver successfully decodes the digital data block.
    Type: Grant
    Filed: February 17, 2000
    Date of Patent: August 5, 2003
    Assignee: Telefonaktiebolaget LM Ericsson
    Inventors: Stefan Jäverbring, Anders Furuskär, Stefan Eriksson, Magnus Frodigh
  • Patent number: 6502063
    Abstract: An apparatus and method for recursive filtering of time discrete measurement data relating to a measurable time-varying attribute to generate an estimated magnitude for the attribute at a particular time instant. Each measurement has an associated reliability indicator representing a relative reliability of the measurement. Using the individual reliability indicators and a time-weighted filtered reliability indicator for a prior time instant, a filtered reliability indicator for the current time instant is generated. The filtered reliability indicator for the current time instant is then used to reliability-weight a weighted average of the plurality of measurements and to reliability-weight a time-weighted estimated magnitude for the prior time instant. The weighted values are then used to generate an estimated magnitude of the time-varying attribute for the current time instant.
    Type: Grant
    Filed: December 9, 1999
    Date of Patent: December 31, 2002
    Assignee: Telefonaktiebolaget LM Ericsson (Publ)
    Inventors: Stefan Eriksson, Anders Furuskär, Stefan Jäverbring
  • Publication number: 20020167969
    Abstract: Flexibly configurable layer one transport channels produce radio blocks in response to communication information and extract communication information from radio blocks. Each transport channel can include an encoder or a decoder coupled to and cooperable with a data puncturer or a data repeater. An information source can produce for each transport channel first configuration information and second configuration information, wherein the first configuration information is indicative of how the associated transport channel is to be configured if a first modulation type is used for a current radio block, and wherein the second configuration information is indicative of how the associated transport channel is to be configured if a second modulation type is used for the current radio block. The physical layer can include a description information source that provides description information from which various configurations of the transport channels can be determined.
    Type: Application
    Filed: April 26, 2002
    Publication date: November 14, 2002
    Inventors: Stefan Eriksson, Arne Berglund, David Bladsjo
  • Publication number: 20020164980
    Abstract: Flexibly configurable layer one transport channels produce radio blocks in response to communication information and extract communication information from radio blocks. One of the transport channels can be enabled to extract its associated communication information from a radio block while another of the transport channels is maintained disabled. The one transport channel provides the extracted communication information to a decision maker in a higher layer. In response to the extracted communication information, the decision maker decides whether the other transport channel should be enabled, and provides to the physical layer an indication of its decision.
    Type: Application
    Filed: April 26, 2002
    Publication date: November 7, 2002
    Inventors: Stefan Eriksson, Arne Berglund, David Bladsjo
  • Publication number: 20020032030
    Abstract: Method in a communication system using a logical control channel transmitting a control channel message, including handover information, between a mobile station 10 and a base station 26, in said system, using a first control channel modulation scheme. The method comprises the step of re-transmitting the control channel message using a second control channel modulation scheme, if the control channel message using the first control channel modulation scheme is not received or understood by the mobile station. According to a preferred embodiment the control channel is a Fast Associated Control Channel (FACCH).
    Type: Application
    Filed: August 24, 2001
    Publication date: March 14, 2002
    Inventors: Arne Kristian Berglund, David Bladsjo, Stefan Eriksson, Joakim Sorelius
  • Patent number: D289163
    Type: Grant
    Filed: November 6, 1984
    Date of Patent: April 7, 1987
    Assignee: Antenn & Elektronik Ekstam & Eriksson
    Inventor: Stefan Eriksson