Patents by Inventor Tommi Tapani Koivisto

Tommi Tapani Koivisto 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: 9490883
    Abstract: A double structured codebook is described that has a wideband codebook portion C(W1) and a frequency-selective codebook portion C(W2). Portion C(W2) is characterised in that for at least one rank index RI, each codeword of C(W2) is uniquely distinguished over all other codewords of C(W2) by at least two beam selection vectors per layer. A device (UE, eNB, etc) utilises the at least two different beam selection 10 vectors per layer to uniquely select a codeword W2 from C(W2) (404); and constructs a pre-coder W from the selected codeword W2 and from another codeword W1 selected from the wideband codebook portion C(W1) for signalling channel conditions (406). An additional co-phasing term for ensuring orthogonality can be utilised with the beam selection vectors per layer to uniquely select the codeword from C(W2), and the two different beam selection vectors per layer correspond to different polarizations (410).
    Type: Grant
    Filed: January 20, 2014
    Date of Patent: November 8, 2016
    Inventors: Karol Schober, Tommi Tapani Koivisto, Mihai Enescu
  • Patent number: 9374716
    Abstract: Embodiments provide a feedback indicator for coordinated multi-point operations of various coordinated multi-point schemes and/or scenarios. An exemplary embodiment involves generating a feedback indicator for coordinated multi-point operations, the feedback indicator indicating a recommendation for a CoMP controller entity to request signaling of multi-point feedback information with respect to multiple coordinated multi-point transmission points, and signaling the generated feedback indicator for coordinated multi-point operations to the CoMP controller entity.
    Type: Grant
    Filed: February 26, 2013
    Date of Patent: June 21, 2016
    Assignee: BROADCOM CORPORATION
    Inventors: Mihai Enescu, Tommi Tapani Koivisto, Helka-Liina Määttänen
  • Patent number: 9344953
    Abstract: An apparatus and method for initialization and mapping of reference signals in a communication system. In one embodiment, the apparatus includes a processor and memory including computer program code. The memory and the computer program code are configured to, with the processor, cause the apparatus to generate a reference signal employable with a plurality of physical resource blocks corresponding to a bandwidth of a communication system, and allocate resource elements of an assigned physical resource block from the plurality of physical resource blocks to a user equipment. The memory and the computer program code are further configured to, with the processor, cause the apparatus to generate a dedicated reference signal for the user equipment by allocating elements of the reference signal in accordance with allocated resource elements of the assigned physical resource block.
    Type: Grant
    Filed: August 16, 2010
    Date of Patent: May 17, 2016
    Assignee: Nokia Technologies Oy
    Inventors: Mieszko Chmiel, Peter Skov, Tommi Tapani Koivisto, Xiangguang Che, Timo Roman
  • Publication number: 20160020837
    Abstract: A double structured codebook is described that has a wideband codebook portion C(W1) and a frequency-selective codebook portion C(W2). Portion C(W2) is characterised in that for at least one rank index RI, each codeword of C(W2) is uniquely distinguished over all other codewords of C(W2) by at least two beam selection vectors per layer. A device (UE, eNB, etc) utilises the at least two different beam selection 10 vectors per layer to uniquely select a codeword W2 from C(W2) (404); and constructs a pre-coder W from the selected codeword W2 and from another codeword W1 selected from the wideband codebook portion C(W1) for signalling channel conditions (406). An additional co-phasing term for ensuring orthogonality can be utilised with the beam selection vectors per layer to uniquely select the codeword from C(W2), and the two different beam selection vectors per layer correspond to different polarizations (410).
    Type: Application
    Filed: January 20, 2014
    Publication date: January 21, 2016
    Applicant: BROADCOM CORPORATION
    Inventors: Karol SCHOBER, Tommi Tapani KOIVISTO, Mihai ENESCU
  • Publication number: 20150319742
    Abstract: Embodiments include methods for allocating physical-layer (PHY) resources of a communication system for a control channel, including determining a set of resource allocation patterns, selecting at least one resource allocation pattern from the determined set, encoding a plurality of indices identifying each of the selected resource allocation patterns, wherein the plurality of indices comprises a first index identifying a selected resource group allocation and a second index identifying a selected resource block allocation, and sending a message comprising the plurality of indices for the selected resource allocation patterns. Other embodiments include methods for determining resource allocation patterns used to allocate PHY resources for a control channel, and methods for receiving an allocation of PHY resources for a control channel. Other embodiments include various apparatus and computer-readable media embodying one or more of the methods.
    Type: Application
    Filed: November 3, 2012
    Publication date: November 5, 2015
    Applicant: BROADCOM CORPORATION
    Inventors: Tommi Tapani KOIVISTO, Chunyan GAO
  • Publication number: 20150016288
    Abstract: A user equipment (UE) provides feedback about channel conditions. From a set of primary sub-bands subject to channel state information reporting by the UE, there is identified one or more of the primary sub-bands for reporting channel quality with a finer frequency-domain granularity than other primary sub-bands of the set (202). The one or more is less than all primary sub-bands in the set. In various embodiments, either the UE or the network can select which are the primary sub-bands to be identified for the finer granularity reporting, and the selection can be for example the best primary sub-bands or those with the highest variance in a measure of channel quality or random (206). Then for each of the identified primary sub-bands, the UE measures and reports the channel quality with the finer frequency-domain granularity for each secondary sub-band whose frequency lay within the respective identified primary sub-band.
    Type: Application
    Filed: January 21, 2014
    Publication date: January 15, 2015
    Inventors: Helka-Liina MAATTANEN, Tommi Tapani KOIVISTO, Mihai Horatiu ENESCU, Kari Paavo Kalevi PIETIKAINEN
  • Publication number: 20140301303
    Abstract: Measures including a method, comprising deriving at least one of one or more statistics of an interfering channel and a rate matching parameter of the interfering channel based on an interfering colocation information received from a serving transmission point device, wherein the interfering channel comprises a channel between an apparatus performing the method and an interfering transmission point device different from the serving transmission point device.
    Type: Application
    Filed: April 4, 2014
    Publication date: October 9, 2014
    Applicant: Broadcom Corporation
    Inventors: Timo Eric ROMAN, Tommi Tapani KOIVISTO, Mihai Horatiu ENESCU, Tero Heikki Petteri KUOSMANEN
  • Patent number: 8811516
    Abstract: A method can include providing channel feedback to support efficient rank override For example, in such a method, a rank?r precoder index corresponding to a rank?r precoder is determined, and performance for each rank?1 precoder within the rank?r precoder is measured Based on the measured performance, a rank?1 precoder that maximizes performance is selected.
    Type: Grant
    Filed: October 29, 2010
    Date of Patent: August 19, 2014
    Assignee: Nokia Corporation
    Inventors: Tommi Tapani Koivisto, Timo Eric Roman, Mihai Horatiu Enescu, Karol Schober
  • Publication number: 20140169565
    Abstract: Methods, apparatus and computer readable storage media are provided herein for scrambling code signalling in support of interference cancelling receivers. In some example embodiments, a method is provided that includes receiving scrambling code initialization parameters for at least one wanted codeword and for at least one interfering codeword from a base station. The method of this embodiment may also include detecting the at least one wanted codeword and the at least one interfering codeword in a transmission that is received from a base station. The method of this embodiment may also include decoding the at least one wanted codeword and the at least one interfering codeword. In some example embodiments, the decoded at least one interfering codeword is used in at least one of interference detection or interference cancellation.
    Type: Application
    Filed: December 12, 2013
    Publication date: June 19, 2014
    Applicant: BROADCOM CORPORATION
    Inventors: Timo Eric ROMAN, Tommi Tapani KOIVISTO, Mihai Horatiu ENESCU, Karl Marko Juhani LAMPINEN
  • Publication number: 20140153488
    Abstract: A network node includes, into a field of downlink control information that provides a user equipment with information for reception and decoding of data transmitted from the network node to the user equipment in a mobile communication network, an indication of receiver information. The receiver information is applicable for interference suppression/cancellation by a receiving operation of the user equipment, capable of performing interference suppression/cancellation using the receiver information. The user equipment detects the receiver information from the downlink control information, and can select a receiving operation using the receiver information.
    Type: Application
    Filed: December 3, 2013
    Publication date: June 5, 2014
    Applicant: BROADCOM CORPORATION
    Inventors: Tommi Tapani KOIVISTO, Mihai Horatiu ENESCU, Timo Eric ROMAN, Karl Marko Juhani LAMPINEN
  • Patent number: 8675592
    Abstract: Embodiments include a method for physical layer transmission in a network equipment including receiving, from a higher layer, messages to be transmitted during a subframe on one or more control channels. The number of elements required (i.e. aggregation level) for each control channel is determined. A plurality of physical resource blocks (PRBs) for transmitting the control channels and partitioning the PRBs into clusters is allocated. The interleaving depth (IDP) for each cluster is determined. Each element is mapped to a cluster according to the IDP for that cluster. A transmission signal including the clusters is generated.
    Type: Grant
    Filed: February 11, 2013
    Date of Patent: March 18, 2014
    Assignee: Broadcom Corporation
    Inventors: Chunyan Gao, Shuang Tan, Erlin Zeng, Tommi Tapani Koivisto, Tero Heikki Petteri Kuosmanen
  • Patent number: 8625632
    Abstract: Messages containing interference vectors are transmitted efficiently to user equipments over a downlink channel. A pre-coding indicator channel is used for transmission in an over-the-air packet-based communication system. A table of pre-coding matrix indices or pre-coding vector information is transmitted to user equipments configured in a spatially multiplexed multiple user MIMO configuration. The UEs receive the pre-coding vector information that allows them to determine the pre-coding vectors used to communicate in the downlink direction from a MIMO base station to other MIMO UEs in the cell or system. The UEs use this information to actively suppress inter-user interference.
    Type: Grant
    Filed: January 28, 2010
    Date of Patent: January 7, 2014
    Assignee: Nokia Corporation
    Inventors: Timo Roman, Cassio Barboza Ribeiro, Tommi Tapani Koivisto, Lars Erik Lindh
  • Publication number: 20130308557
    Abstract: Embodiments include a method for physical layer transmission in a network equipment including receiving, from a higher layer, messages to be transmitted during a subframe on one or more control channels. The number of elements required (i.e. aggregation level) for each control channel is determined. A plurality of physical resource blocks (PRBs) for transmitting the control channels and partitioning the PRBs into clusters is allocated. The interleaving depth (IDP) for each cluster is determined. Each element is mapped to a cluster according to the IDP for that cluster. A transmission signal including the clusters is generated.
    Type: Application
    Filed: February 11, 2013
    Publication date: November 21, 2013
    Applicant: RENESAS MOBILE CORPORATION
    Inventors: Chunyan GAO, Shuang TAN, Erlin ZENG, Tommi Tapani KOIVISTO, Tero Heikki Petteri KUOSMANEN
  • Publication number: 20130021989
    Abstract: Methods, apparatuses and related computer program product for control information signaling.
    Type: Application
    Filed: January 7, 2010
    Publication date: January 24, 2013
    Applicant: NOKIA CORPORATION
    Inventors: Esa Tapani Tiirola, Timo Erkki Lunttila, Kari Pekka Pajukoski, Kari Juhani Hooli, Peng Chen, Tommi Tapani Koivisto
  • Patent number: 8300587
    Abstract: A scrambling sequence is initialized using at least a cell identifier and an offset, and a physical downlink control information DCI is sent to a user equipment which indicates the offset. In more particular embodiments a user equipment-specific reference signal UE-RS is scrambled using the initialized scrambling sequence, and the scrambled UE-RS is sent to the UE for demodulating a downlink shared channel (PDSCH). In another exemplary embodiment the generated UE-RS is sent in a pilot part of a subframe transmission associated with the PDSCH and is for demodulating at least a data part of that subframe transmission. In a specific embodiment from the UE side, the UE receives the UE-RS and the DCI which indicates the offset, descrambles the UE-RS using a scrambling sequence that is initialized using a cell identifier and the indicated offset; and demodulates the PDSCH using the de-scrambled UE-RS.
    Type: Grant
    Filed: March 1, 2010
    Date of Patent: October 30, 2012
    Assignee: Nokia Corporation
    Inventors: Mieszko Chmiel, Peng Chen, Tommi Tapani Koivisto, Xiang Guang Che, Timo Eric Roman
  • Patent number: 8248997
    Abstract: In accordance with an example embodiment of the present invention, a method is disclosed that comprises receiving a reference signal from each of at least two target neighbor cells via at least one receiving branch at a user equipment; estimating a timing range based at least on one of a timing advance for a serving cell and an inter-cell distance between the target neighbor cell and the serving cell; computing a reference signal time difference for the received reference signal from the target neighbor cell; and screening the computed reference signal time difference using the estimated timing range.
    Type: Grant
    Filed: August 17, 2009
    Date of Patent: August 21, 2012
    Assignee: Nokia Corporation
    Inventors: Gilles Charbit, Tommi Tapani Koivisto
  • Publication number: 20120201321
    Abstract: A method can include providing channel feedback to support efficient rank override For example, in such a method, a rank?r precoder index corresponding to a rank?r precoder is determined, and performance for each rank?1 precoder within the rank?r precoder is measured Based on the measured performance, a rank?1 precoder that maximizes performance is selected
    Type: Application
    Filed: October 29, 2010
    Publication date: August 9, 2012
    Applicant: NOKIA CORPORATION
    Inventors: Tommi Tapani Koivisto, Timo Eric Roman, Mihai Horatiu Enescu, Karol Schober
  • Publication number: 20120113851
    Abstract: In an embodiment, state of a wireless channel on which information is received is measured; the measured state is used to select from a codebook a plurality of N codewords which optimize a predefined measure, and first and second codewords of the plurality are reported which best optimizes and next-best optimizes the predefined measure. If by example the above is done by a user equipment UE, in another embodiment the network receives first and second indications, searches a codebook using the first and second indications to find the first and second codewords; and utilizes them to improve the channel state information, such as by interpolating between them to find an estimate of the channel. In examples the channel is a MIMO channel that is estimated at two or more antenna ports, there are interpolation weights sent with the codeword indications, and the interpolating uses a geodesic algorithm.
    Type: Application
    Filed: April 22, 2010
    Publication date: May 10, 2012
    Applicant: NOKIA CORPORATION
    Inventors: Karol Schober, Tommi Tapani Koivisto, Timo Eric Roman, Mihai Horatiu Enescu, Timo Erkki Lunttila
  • Publication number: 20110305211
    Abstract: Disclosed is a method, apparatus and a computer readable memory medium that stores a program of computer instructions for enabling a resource allocation to be made for user equipment. The method includes forming a resource allocation for a particular system bandwidth, where the resource allocation has a larger number of resource blocks than a maximum number of resource blocks associated with the particular system bandwidth, while maintaining a same resource block group size as would be present with the maximum number of resource blocks for the particular system bandwidth. The step of forming includes the use of an extended parameter in a derivation of the resource allocation. The method further includes transmitting information descriptive of the resource allocation to user equipment. The resource allocation may be a downlink resource allocation or an uplink resource allocation.
    Type: Application
    Filed: September 25, 2008
    Publication date: December 15, 2011
    Applicant: NOKIA CORPORATION
    Inventors: Timo Erkki Lunttila, Timo Eric Roman, Tommi Tapani Koivisto
  • Publication number: 20110243090
    Abstract: In accordance with the exemplary embodiments of the invention, there is described herein at least a method, executable computer program, and apparatus to form a resource allocation for a particular bandwidth, including defining at least one search space for a first bandwidth region used by a first user equipment and for a second bandwidth region used by a second user equipment, each search space including control channel elements, where there are first control channel elements in the first bandwidth region and second control channel elements in the second bandwidth region, and transmitting information descriptive of the resource allocation to the first user equipment and the second user equipment.
    Type: Application
    Filed: December 9, 2009
    Publication date: October 6, 2011
    Applicant: NOKIA CORPORATION
    Inventors: Asbjorn Grovlen, Lars Erik Lindh, Timo Eric Roman, Tommi Tapani Koivisto