Patents by Inventor Kai-Erik Sunell
Kai-Erik Sunell 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).
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Patent number: 8605642Abstract: The method and arrangement according to the present invention relates to of scheduling and coding in communication systems utilizing automatic repeat request (ARQ) and/or multihop scheduling and forwarding. According to the inventive method the receiving nodes selectively stores received information, also overheard information, as a priori information and feed back information about their respective stored a priori information to a sending node. The sending node forms composite data packets by jointly encoding and scheduling multiple data packets, which composite data packets are transmitted to receiving nodes. Upon receiving a composite data packet the receiving nodes uses their stored a priori information in the process of extracting data for themselves from the composite data packets.Type: GrantFiled: July 7, 2005Date of Patent: December 10, 2013Assignee: Telefonaktiebolaget LM Ericsson (Publ)Inventors: Peter Larsson, Kai-Erik Sunell, Niklas Johan Johansson
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Patent number: 8526397Abstract: The technology applies to a cellular radio communication system in which a mobile radio terminal transmits information in transmission time intervals (TTIs) that is received by a serving base station and by one or more non-serving base stations. A number N of hybrid automatic repeat request (HARQ) transmissions transmitted together by the mobile terminal is determined. An HARQ transmission includes a first transmission, one or more retransmissions of the first transmission, or both. An indication of the number N of HARQ transmissions is provided either directly or indirectly to the one or more non-serving base stations so that the one or more non-serving base stations can take the number N into account when combining HARQ transmissions received from the mobile terminal.Type: GrantFiled: December 29, 2008Date of Patent: September 3, 2013Assignee: Telefonaktiebolaget L M Ericsson (publ)Inventors: Johan Bergman, Henrik Enbuske, Dirk Gerstenberger, Kai-Erik Sunell
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Patent number: 8509263Abstract: Communication efficiency may be enhanced by using compressed headers. In an example embodiment, a method is performed by a transmitting device to reduce header size. A mapping is created between a logical channel identifier and a compressed logical channel identifier. The compressed logical channel identifier occupies fewer bits than the logical channel identifier. The mapping is transmitted to a receiving device. A compressed header that includes the compressed logical channel identifier is formulated. A communication that includes the compressed header is transmitted to the receiving device. In another example embodiment, a method is performed by a receiving device to decode a header having a reduced size. A mapping and a communication including a compressed header are received. A compressed logical channel identifier is extracted from the compressed header. A logical channel identifier is recovered from the compressed logical channel identifier using the mapping.Type: GrantFiled: February 3, 2009Date of Patent: August 13, 2013Assignee: Telefonaktiebolaget LM Ericsson (Publ)Inventors: Anders Jonsson, Janne Peisa, Kai-Erik Sunell
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Publication number: 20130095816Abstract: The embodiments herein relate to a method in a base station for communicating with a user equipment in the communication network. The base station is configured to communicate with the user equipment according to a selectable of at least two user equipment categories. Based on information about a selected user equipment category, the base station determines a first number of maximum transmission layers supported by the base station. The base station communicates with the user equipment according to up to the determined first number of maximum transmission layers and according to the selected user equipment category.Type: ApplicationFiled: October 14, 2011Publication date: April 18, 2013Inventors: Dirk Gerstenberger, Kai-Erik Sunell, Henning Wiemann, Daniel Larsson
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Patent number: 8345638Abstract: An access node in the boundary area of a single frequency network service area transmits a boundary indication to the mobile terminals in the boundary area to notify the mobile terminals that they are approaching the boundaries of the single frequency network. The mobile terminals receiving the boundary indications may then take steps to maintain continuity of broadcast services when the mobile terminals leave the service area of the single frequency network.Type: GrantFiled: January 28, 2008Date of Patent: January 1, 2013Assignee: Telefonaktiebolaget L M Ericsson (publ)Inventors: Mats Buchmayer, Henrik Enbuske, Gunnar Mildh, Kai-Erik Sunell
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Publication number: 20120230261Abstract: Embodiments herein relate to a method in a mobile terminal (10) for requesting access to a wireless communication system. The mobile terminal (10) receives broadcasted system information that indicates a first available resource of a contention based channel. The mobile terminal (10) derives a second available resource of the contention based channel based on the first available resource of the contention based channel. The mobile terminal (10) further transmits an access request preamble mapped to the second available resource to access the wireless communication system.Type: ApplicationFiled: September 28, 2011Publication date: September 13, 2012Inventors: Jose Luis Pradas, Gertie Alsenmyr, Francisco Manzano, Kai-Erik Sunell, Janne Peisa
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Patent number: 8243758Abstract: The object of the present invention is to provide a mechanism for a more efficient carrier search. The object is achieved by a method for sending a signal in a first node. The first node communicates with a second node via radio communication, which radio communication is performed by multi carrier transmission. The first node uses a carrier, being associated with a frequency range. The method comprises the step of transmitting an end-marker signal within or close to the frequency range. The end-marker signal is intended to be received and used by the second node for identifying the frequency range of the used carrier.Type: GrantFiled: May 19, 2006Date of Patent: August 14, 2012Assignee: Telefonaktiebolaget LM Ericsson (publ)Inventors: Johan Axnäs, Niklas Johansson, Johan Nyström, Per Skillermark, Kai-Erik Sunell
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Publication number: 20120176951Abstract: Embodiments herein relate to a method in a mobile terminal (10) for requesting access to a wireless communication system. The mobile terminal (10) receives broadcasted system information directly indicating first access request preambles for a first contention based channel, and indirectly indicating second access request preambles for a second contention based channel based on the directly indicated first access request preambles. The mobile terminal (10) further derives the second access request preambles from the first access request preambles. Additionally, the mobile terminal requests access using the second access request preambles or the first access request preambles to access the wireless communication system.Type: ApplicationFiled: September 28, 2011Publication date: July 12, 2012Applicant: Telefonaktiebolaget L M Ericsson (PUBL)Inventors: Jose Luis Pradas, Gertie Alsenmyr, Francisco Manzano, Kai-Erik Sunell, Janne Peisa
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Patent number: 8139587Abstract: Packets may be routed in a heterogeneous communications network as follows: for a set of packets comprising at least one packet to be transmitted from a sending node, said sending node being able to handle communication according to at least two access technologies,—selecting in a selection unit in the sending node an access technology for use when transmitting the set of packets,—selecting a receiving node in the network to which to transmit the set of packets among nodes in the network that are able to handle said selected access technology—transmitting the set of packets to the selected receiving node using the selected access technology. Alternatively, a set of packets may be transmitted to one or more nodes using at least two different access technologies. Depending on the transmission quality, one node may be selected to forward the set of packets.Type: GrantFiled: November 11, 2004Date of Patent: March 20, 2012Assignee: Telefonaktiebolaget LM Ericsson (publ)Inventors: Peter Larsson, Mikael Prytz, Kai-Erik Sunell, Johan Lundsjo, Niklas Johansson
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Publication number: 20120008563Abstract: Teachings presented herein provide reduced computational complexity and/or memory requirements for a mobile terminal to determine the power backoff required for a multi-carrier uplink signal. In particular, the mobile terminal determines whether its power headroom falls below a pre-defined power headroom threshold, indicating that it is headroom limited. If so, it5 quantizes power allocated to each carrier of the multi-carrier uplink signal according to a pre-defined quantization policy. In doing so, the mobile terminal thereby reduces the possible configurations that may be selected for the multi-carrier uplink signal. Thus, in one embodiment, the mobile terminal stores the required backoff in a look-up table for only the configurations that may be selected when the mobile terminal is headroom limited. This relieves 10 the memory requirements of the mobile terminal as compared to storing the required backoff for all possible configurations of the multi-carrier uplink signal.Type: ApplicationFiled: December 28, 2009Publication date: January 12, 2012Applicant: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)Inventors: Klas Johansson, Torgny Palenius, Kai-Erik Sunell, Anders Wallen
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Patent number: 7920501Abstract: A relaying node is in bidirectional communication with at least a first and a second sending/receiving radio node, and the relaying radio node receives at least a first signal carrying at least first data and a second signal carrying at least second data. The relaying node generates a reduced representation of at least the first and second signal, with a reduced information content as compared to the first and second data, by a joint non-linearly encoding operation, and transmits the reduced representation to at least the first and the second communication node. The first and second sending/receiving node can extract data from the reduced representation by a non-linear decoding operation using stored a priori information.Type: GrantFiled: December 22, 2005Date of Patent: April 5, 2011Assignee: Telefonaktiebolaget LM Ericsson (publ)Inventors: Peter Larsson, Niklas Johansson, Kai-Erik Sunell
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Patent number: 7920888Abstract: A radio network entity in charge of outer loop power control for a communication with a mobile radio is informed about erroneous data units, requested retransmissions, and/or data units transmission attempts associated with the data units sent by the mobile radio to the radio network. Another radio network entity, which sends a transmission power control signal to the mobile radio to control the mobile's transmit power level based on a target value, detects errors in data units received from the mobile radio and requests retransmission. Information associated with the requested retransmission is used to generate a revised target value. The target value may be revised by an outer loop power controller node or by an outer loop power controller entity in the same node as an ARQ entity that generates the information about erroneous data units, requested retransmissions, and/or data units transmission attempts associated with the data units sent by the mobile radio to the radio network.Type: GrantFiled: April 6, 2004Date of Patent: April 5, 2011Assignee: Telefonaktiebolaget L M Ericsson (Publ)Inventors: Per Beming, Stefan Parkvall, Kai-Erik Sunell, Eva Englund
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Publication number: 20110038352Abstract: The technology applies to a cellular radio communication system in which a mobile radio terminal transmits information in transmission time intervals (TTIs) that is received by a serving base station and by one or more non-serving base stations. A number N of hybrid automatic repeat request (HARQ) transmissions transmitted together by the mobile terminal is determined. An HARQ transmission includes a first transmission, one or more retransmissions of the first transmission, or both. An indication of the number N of HARQ transmissions is provided either directly or indirectly to the one or more non-serving base stations so that the one or more non-serving base stations can take the number N into account when combining HARQ transmissions received from the mobile terminal.Type: ApplicationFiled: December 29, 2008Publication date: February 17, 2011Applicant: TELEFONAKTIEBOLAGET l M ERICSSON (publInventors: Johan Bergman, Henrik Enbuske, Dirk Gerstenberger, Kai-Erik Sunell
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Publication number: 20110007755Abstract: Communication efficiency may be enhanced by using compressed headers. In an example embodiment, a method is performed by a transmitting device to reduce header size. A mapping is created between a logical channel identifier and a compressed logical channel identifier. The compressed logical channel identifier occupies fewer bits than the logical channel identifier. The mapping is transmitted to a receiving device. A compressed header that includes the compressed logical channel identifier is formulated. A communication that includes the compressed header is transmitted to the receiving device. In another example embodiment, a method is performed by a receiving device to decode a header having a reduced size. A mapping and a communication including a compressed header are received. A compressed logical channel identifier is extracted from the compressed header. A logical channel identifier is recovered from the compressed logical channel identifier using the mapping.Type: ApplicationFiled: February 3, 2009Publication date: January 13, 2011Inventors: Anders Jonsson, Janne Peisa, Kai-Erik Sunell
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Publication number: 20110004797Abstract: The present invention relates to methods and arrangements that enable continuous adaptive control of the number of autonomous HARQ retransmissions. This is achieved by a solution, where the UE and the radio base station are using a number of autonomous HARQ retransmissions that can be adjusted based on observations in the UE and/or the radio base station. What is observed is the amount of HARQ retransmissions needed for the radio base station to correctly decode the latest received data packet(s).Type: ApplicationFiled: December 1, 2008Publication date: January 6, 2011Inventors: Dirk Gerstenberger, Johan Bergman, Kai-Erik Sunell
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Publication number: 20100195622Abstract: An access node in the boundary area of a single frequency network service area transmits a boundary indication to the mobile terminals in the boundary area to notify the mobile terminals that they are approaching the boundaries of the single frequency network. The mobile terminals receiving the boundary indications may then take steps to maintain continuity of broadcast services when the mobile terminals leave the service area of the single frequency network.Type: ApplicationFiled: January 28, 2008Publication date: August 5, 2010Applicant: TELEFONAKTIEBOLAGET L M ERICSSSON (PUBL)Inventors: Mats Buchmayer, Henrik Enbuske, Gunnar Mildh, Kai-Erik Sunell
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Publication number: 20100195592Abstract: In compression of packet data headers the compressor side (100) in a point-to-multipoint connection transmits (301) a message announcing a particular service. The entities (200) receiving the announcement message are adapted to respond to the message and based on the response message(s) (305) the compressor can adapt the compression scheme used. In particular the compressor may compress (315) or not compress (311) the header of the packet data header.Type: ApplicationFiled: March 27, 2008Publication date: August 5, 2010Applicant: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)Inventors: Kai-Erik Sunell, Mats Buchmayer
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Publication number: 20090268662Abstract: The present invention relates to methods and arrangements in a relaying radio node and/or in a sending/receiving radio node, adapted for use in a relaying communication system. The relaying node is in bidirectional communication with at least a first and a second sending/receiving radio node, and the relaying radio node receives at least a first signal carrying at least first data and a second signal carrying at least second data. The relaying node generates a reduced representation of at least the first and second signal, with a reduced information content as compared to the first and second data, by a joint non-linearly encoding operation, and transmits the reduced representation to at least the first and the second communication node. The first and second sending/receiving node can extract data from the reduced representation by a non-linear decoding operation using stored a priori information.Type: ApplicationFiled: December 22, 2005Publication date: October 29, 2009Inventors: Peter Larsson, Niklas Johansson, Kai-Erik Sunell
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Publication number: 20090147738Abstract: The method and arrangement according to the present invention relates to of scheduling and coding in communication systems utilizing automatic repeat request (ARQ) and/or multihop scheduling and forwarding. According to the inventive method the receiving nodes selectively stores received information, also overheard information, as a priori information and feed back information about their respective stored a priori information to a sending node. The sending node forms composite data packets by jointly encoding and scheduling multiple data packets, which composite data packets are transmitted to receiving nodes. Upon receiving a composite data packet the receiving nodes uses their stored a priori information in the process of extracting data for themselves from the composite data packets.Type: ApplicationFiled: July 7, 2005Publication date: June 11, 2009Inventors: Peter Larsson, Kai-Erik Sunell, Niklas Johan Johansson
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Publication number: 20090109902Abstract: The object of the present invention is to provide a mechanism for a more efficient carrier search. The object is achieved by a method for sending a signal in a first node. The first node communicates with a second node via radio communication, which radio communication is performed by multi carrier transmission. The first node uses a carrier, being associated with a frequency range. The method comprises the step of transmitting an end-marker signal within or close to the frequency range. The end-marker signal is intended to be received and used by the second node for identifying the frequency range of the used carrier.Type: ApplicationFiled: May 19, 2006Publication date: April 30, 2009Inventors: Johan Axnas, Niklas Johansson, Johan Nystrom, Per Skillermark, Kai-Erik Sunell