Combined Time Division And Frequency Division Patents (Class 370/478)
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Patent number: 8654740Abstract: Techniques for periodically resetting the polar cap for a differential codebook precoding scheme for wireless communications are described. An apparatus may comprise a fixed device for a mobile broadband communications system utilizing an orthogonal frequency-division multiple access technique, the fixed device having a precoding module operative to generate a precoding matrix using a received first codeword of a first base codebook, subsequently reconstruct the precoding matrix using a received polar-cap codeword of a polar-cap codebook, and periodically reset the precoding matrix to clear accumulated error at the fixed device using a received second codeword of a second base codebook. Other embodiments are described and claimed.Type: GrantFiled: September 25, 2009Date of Patent: February 18, 2014Assignee: Intel CorporationInventors: Yuan Zhu, Qinghua Li
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Patent number: 8644270Abstract: A method and system for configuring a frame in a communication system is provided.Type: GrantFiled: February 22, 2008Date of Patent: February 4, 2014Assignee: Samsung Electronics Co., Ltd.Inventors: Jeong-Ho Park, Kwan-Hee Roh, Jae-Hee Cho, Tae-Young Kim, Jin-Kyu Koo, Dong-Seek Park, Ho-Kyu Choi
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Patent number: 8638737Abstract: A method and apparatus are provided for use in a wireless communications system to enable dynamic selection of k sub-MAPs, and rates for transmitting these k sub-MAPs within communication frames. The method comprises the steps: a) for at least one communication frame comprised within a first interval of time, retrieving information on statistical distribution of downlink (DL) channel rates for a group of subscriber devices; b) based on that information, selecting k and corresponding transmission rates for k sub-MAPs, to minimize total amount of resources to be allocated for MAP and sub-MAPs transmission within that communication frame comprised within the first time interval and/or within a second interval of time that proceeds the first interval of time; and c) transmitting the k sub-MAPs at the selected corresponding transmission rates in communication frames comprised within the first time interval and/or within the second interval of time that proceeds the first one.Type: GrantFiled: December 29, 2010Date of Patent: January 28, 2014Assignee: Alvarion Ltd.Inventor: Yaniv Weizman
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Patent number: 8638746Abstract: A method and apparatus is disclosed herein for scheduling and transmission for downlink multi-user MIMO (MU-MIMO). In one embodiment, the method comprises allocating a subset of time-frequency resources in the time-frequency plane to each distinct bin class, where each bin class comprises one or more bins of user terminals across the topology, and wherein user terminals in the one or more bins of each bin class are served across the topology by the subset of time-frequency resources. The method also comprises performing joint downlink MU-MIMO transmission using a plurality of bin class-dependent wireless transmission architectures at the plurality of base stations, where one or more bin classes is associated with one of the plurality of bin class-dependent architectures, and where each of the plurality of bin class-dependent architectures use different combinations of scheduling training and MU-MIMO transmission across the topology.Type: GrantFiled: November 3, 2011Date of Patent: January 28, 2014Assignee: NTT DoCoMo, Inc.Inventors: Haralabos Papadopoulos, Sean Ramprashad, Giuseppe Caire
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Patent number: 8638819Abstract: A wireless communication transceiver and a mode switch device thereof. The transceiver includes: a first band transmission path; a first band reception path; a second band transmission path; a second band reception path; a path switch and a control unit. In a dual band time division duplexing mode, the control unit controls the path switch so that the path switch connects a received radio frequency signal from an antenna to the first band reception path, and connects a transmitted radio frequency signal from the second band transmission path to the antenna in an odd cycle or an even cycle; and controls the path switch so that the path switch connects a received radio frequency signal from the antenna to the second band reception path, and connects a transmitted radio frequency signal from the first band transmission path to the antenna in another odd cycle or another even cycle.Type: GrantFiled: September 29, 2010Date of Patent: January 28, 2014Assignee: International Business Machines CorporationInventors: Jian Wen Chen, Lin Chen, Yong Hua Lin, Qing Wang, Rong Yan, Zhen Bo Zhu
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Patent number: 8619613Abstract: The invention relates to a method of configuration of random access resources in the case of carrier aggregation wherein one or more uplink and downlink component carriers can be configured by the network, the method comprising the resolution of carrier ambiguity in case of downlink and uplink asymmetric component carrier (CC) configuration by allowing the network to determine on which downlink component carrier the UE camps on. The invention further relates to a method of random access and a network entity and a user equipment for implementing the methods.Type: GrantFiled: November 20, 2009Date of Patent: December 31, 2013Assignee: LG Electronics Inc.Inventor: Dragan Vujcic
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Patent number: 8619789Abstract: In one embodiment, a battery-operated communication device “quick-samples” a frequency hopping sequence at a periodic rate corresponding to a substantially low duty cycle, and is discovered by (e.g., attached to) a main-powered communication device. During a scheduled sample, the main-powered communication device transmits a control packet to be received by the battery-operated communication device, the control packet containing timing information and transmitted to account for worst-case clock drift error between the two devices. The battery-operated communication device responds to the control packet with a link-layer acknowledgment containing timing information from the battery-operated communication device. Accordingly, the two devices may re-synchronize their timing based on the timing information in the control packet and acknowledgment, respectively.Type: GrantFiled: July 12, 2011Date of Patent: December 31, 2013Assignee: Cisco Technology, Inc.Inventors: Jonathan W. Hui, Lik Chuen Alec Woo, Wei Hong
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Patent number: 8620988Abstract: A system and method for processing syndication information for a mobile device that includes: identifying a plurality of syndication servers to which a user of the mobile device subscribes; polling, at a first predetermined interval, the plurality of syndication servers to determine if syndication information on each the syndication server has been updated; if the syndication information has been updated, requesting and receiving updated syndication information; adapting the updated syndication information into a predetermined format, and sending the adapted syndication information to the mobile device. The sending of the adapted syndication information may also be performed at a predetermined interval. The predetermined format preferably uses less data and requires less processing than the original format.Type: GrantFiled: March 23, 2005Date of Patent: December 31, 2013Assignee: Research In Motion LimitedInventors: Mark Sohm, Jennifer Emery, Michael Clewley
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Patent number: 8594117Abstract: A base station in a mobile communications system which uses a single-carrier technique for uplink includes a classifying unit which classifies, for each of multiple user apparatuses according to a path loss between the respective user apparatus and the base station, the multiple user apparatuses into two or more groups; and a scheduler which plans allocating of uplink resources to the user apparatuses. Uplink signals of each user apparatus that have multiple frequency components lined up in equal frequency intervals are multiplexed using a distributed frequency division multiplexing technique such that they are made mutually orthogonal on a frequency axis, the scheduler plans the resource allocating such that the user apparatuses belonging to different groups utilize different group bands or different time slots, and the group bands are specified by dividing a system band into groups.Type: GrantFiled: June 13, 2007Date of Patent: November 26, 2013Assignee: NTT DoCoMo, Inc.Inventors: Teruo Kawamura, Yoshiaki Ofuji, Yoshihisa Kishiyama, Kenichi Higuchi, Mamoru Sawahashi, Seizo Onoe
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Patent number: 8594573Abstract: This document presents a wireless communication scheme utilizing a combination of two wireless communication schemes: a short range communication scheme and a radio communication scheme having a longer wireless transmission range than the wireless transmission range of the short range communication scheme. A short range signal is used to indicate a radio resource to be used for transmitting a radio signal, and the radio signal is then communicated in the radio resource indicated by the short range signal.Type: GrantFiled: July 6, 2011Date of Patent: November 26, 2013Assignee: Polar Electro OyInventors: Jari Miettinen, Juhani Kemppainen
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Patent number: 8588052Abstract: A multi-tone modem has a plurality of shared and discrete components forming a transmit path and a receive path configured to couple to a wired communication medium for packet based communication thereon. The transmit path includes components for forming a communication packet including a hybrid preamble portion and a data portion. The hybrid preamble portion integrates both synch and timing info for packet alignment together with header information for determining at least packet destination, thereby shortening packet length by avoiding a requirement of a distinct header portion. The receive path includes components operative in a time domain to detect, in a stream of digitized samples, a symbol alignment of a received communication packet based on synch and timing info in the hybrid preamble portion thereof and operative in a frequency domain to extract header information from the hybrid preamble.Type: GrantFiled: October 6, 2009Date of Patent: November 19, 2013Assignee: Ikanos Communications, Inc.Inventor: Sigurd Schelstraete
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Patent number: 8582417Abstract: A transmitting device for transmitting data and pilot symbols in an OFDM transmission system having transmission antennas. The device includes symbol generating means for generating data and pilot symbols, means for transmitting the data and pilot symbols using subcarriers of the OFDM system. The symbol generating means generates a first and second type pilot symbol, the second having an inverted value of the first so that a first pilot symbol pattern to be transmitted by using one of said plurality of transmission antennas has a different pattern in the frequency and time dimension from a second pilot symbol pattern to be transmitted by using another transmission antenna. First and second pilot symbols are comprised in respective first and second pilot symbol patterns, where at least some of the first and second pilot symbols have the same time allocation and being alternately identical and inverted to each other.Type: GrantFiled: April 11, 2011Date of Patent: November 12, 2013Assignee: Sony Deutschland GmbHInventors: Zhaocheng Wang, Richard Stirling-Gallacher
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Patent number: 8576871Abstract: A collision avoidance method for subscribers to fight for a right to speak of a multi-party conversation in a digital intercommunication system includes: sending a frame of instructions from the transmitting subscriber to the receiving subscribers for declaring a beginning of a fight for phase; in a subset of frame moments during the fight-for phase, sending maintenance information by the transmitting subscriber to the receiving subscribers; in another subset of the frame moments during the fight-for phase, broadcasting a request for the right to speak by the receiving subscribers intending to obtain the right to speak in turn, the fight-for phase not closing until at least one of the receiving subscribers sends out a request message; hearing the request message, ceasing fighting for the right to speak by the other receiving subscribers; and the receiving subscriber obtaining the right to speak as a new transmitting subscriber and beginning to speak.Type: GrantFiled: January 8, 2008Date of Patent: November 5, 2013Assignee: Spreadtrum Communications (Shanghai) Co., Ltd.Inventors: Hongchao Deng, Jingdong Lin
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Patent number: 8570973Abstract: A wireless communication system in which a terminal selects a signal from a plurality of known signals and transmits the signal to the base station by any region in a region specified by the base station. The wireless communication system includes a setting unit that sets a region by a frequency range and a time interval as the region to be specified, wherein the region set by the setting unit and a region set by another neighboring base station have a same frequency range and a same time interval.Type: GrantFiled: October 23, 2008Date of Patent: October 29, 2013Assignee: Fujitsu LimitedInventor: Junichi Suga
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Patent number: 8553725Abstract: A node is configured to receive an instruction to establish a channel having a bandwidth that corresponds to an operating spectrum an optical fiber; obtain information that identifies a channel spacing and a pointer that identifies where, within the spectrum, to establish bandwidth allocations; identify a group of bandwidth segments based on the spectrum and the channel spacing; and generate bit words that correspond to the bandwidth allocations, where the bit words includes bits that, when set to a value, cause sets of segments to be reserved within the spectrum, and where the sets of segments identify where the bandwidth allocations begin and end, within the spectrum, relative to the pointer.Type: GrantFiled: September 30, 2011Date of Patent: October 8, 2013Assignee: Infinera CorporationInventors: Iftekhar Hussain, Abinder Dhillon, Zhong Pan, Marco E. Sosa
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Patent number: 8547922Abstract: The present disclosure discloses a signal resource determination method, and the method includes that: carrying a dedicated demodulation data reference signal in a Resource Element (RE) on an Orthogonal Frequency Division Multiplexing (OFDM) symbol, wherein the OFDM symbol is in a non-control channel area of a Resource Block (RB) and carries a non-common reference signal.Type: GrantFiled: June 10, 2010Date of Patent: October 1, 2013Assignee: ZTE CorporationInventors: Guanghui Yu, Ruyue Li, Yunfeng Sun, Bo Dai, Junfeng Zhang
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Patent number: 8547883Abstract: A system and method for transmitting resource allocation information by a base station in a communication system is provided. The method includes generating first MAP messages for user terminals, each of which includes an identifier of a corresponding user terminal and corresponds to resource allocation information on a first band, in an order of user terminals, generating a second MAP message, which corresponds to resource allocation information for a user terminal allocated resources of only a second band, and generating third MAP messages, which correspond to resource allocation information on the second band, for user terminals allocated resources of both the first band and the second band, among the user terminals, in the order of user terminals allocated resources of both the first band and the second band, transmitting the first MAP message through the first band, and transmitting the second and third MAP messages through the second band.Type: GrantFiled: August 19, 2008Date of Patent: October 1, 2013Assignee: Samsung Electronics Co., Ltd.Inventors: Young-Ho Jung, Yung-Soo Kim, Myeon-Kyun Cho
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Patent number: 8526410Abstract: Methods and apparatus related to the sharing of wide area network (WAN) downlink bandwidth with peer to peer communication signaling usage are described. A WAN, e.g., cellular, wireless communications device using a base station attachment point, transmits a signal to be used by a peer to peer wireless communications device for controlling its peer to peer transmit power level. The peer to peer wireless communications device receives and measures the strength of the power control signal from the WAN wireless communications device. The measurement information is used by the peer to peer wireless communications device in determining whether or not peer to peer signal transmission is permitted and/or in determining a peer to peer transmission power level. Thus the WAN device is able to manage interference from the peer to peer devices in its vicinity which impacts its recovery of WAN base station downlink signals.Type: GrantFiled: July 6, 2007Date of Patent: September 3, 2013Assignee: QUALCOMM IncorporatedInventors: Junyi Li, Rajiv Laroia, Xinzhou Wu
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Patent number: 8526412Abstract: Techniques for multiplexing multiple data streams using frequency division multiplexing (FDM) in an OFDM system are described. M disjoint “interlaces” are formed with U usable subbands. Each interlace is a different set of S subbands, where U=M·S. The subbands for each interlace are interlaced with the subbands for each of the other M?1 interlaces. M slots may be defined for each symbol period and assigned slot indices 1 through M. The slot indices may be mapped to interlaces such that (1) frequency diversity is achieved for each slot index and (2) the interlaces used for pilot transmission have varying distances to the interlaces used for each slot index, which improves channel estimation performance. Each data stream may be processed as data packets of a fixed size, and different numbers of slots may be used for each data packet depending on the coding and modulation scheme used for the data packet.Type: GrantFiled: October 18, 2004Date of Patent: September 3, 2013Assignee: QUALCOMM IncorporatedInventors: Rajiv Vijayan, Gordon Kent Walker, Raghuraman Krishnamoorthi, Murali R. Chari
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Patent number: 8526366Abstract: A method, apparatuses, and system of broadcasting content data in a macro-diversity region of a data frame includes receiving a stream of transport packets. Selecting at least one burst size, from amongst a set of a plurality of predetermined burst sizes. Allocating one or more data bursts with the selected burst size to the macro-diversity region of the data frame, each data burst comprising at least a portion of the received transport packets and wherein the at least one burst size is selected so as to minimize a number of data bursts allocated to the macro-diversity region. Then communicating the allocation of data bursts to a transmitter that includes the allocation of data bursts in the macro-diversity region of a data frame transmitted by the transmitter.Type: GrantFiled: March 8, 2011Date of Patent: September 3, 2013Assignee: Wi-Lan, Inc.Inventors: Dennis P. Connors, Huei-Jiun Ju, Keerthi S. Govind, Sina Zahedi
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Patent number: 8509178Abstract: A method and apparatus for requesting uplink resources in a wireless communication system is provided. A user equipment determines whether a scheduling request for requesting uplink resources is triggered. If the scheduling request is triggered, the user equipment transmits a first set of frequency domain sequences and a second set of frequency domain sequences in a subframe.Type: GrantFiled: April 17, 2012Date of Patent: August 13, 2013Assignee: LG Electronics Inc.Inventors: Yeong Hyeon Kwon, Seung Hee Han, Hyun Woo Lee, Jae Hoon Chung, Jin Sam Kwak, Dong Cheol Kim, Min Seok Noh
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Patent number: 8503480Abstract: Systems and methods for allocating network bandwidth between a plurality of networks. Requests for bandwidth allocation from other networks can be received. A coexistence frame requesting an allocation of bandwidth for a local network can be generated based upon the bandwidth allocation requests received from other networks. The coexistence frame can be transmitted, and utilization of the requested allocation can be delayed by a reservation period.Type: GrantFiled: June 4, 2008Date of Patent: August 6, 2013Assignee: Qualcomm Atheros, Inc.Inventors: Lawrence W. Yonge, III, Srinivas Katar, Richard E. Newman
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Patent number: 8503287Abstract: An IS-OFDM system for ultra-wideband (UWB) wireless communications that suppresses narrow-band interference, comprising an in-premises base station (IBS) is described. The IBS further comprises an IS-OFDM transceiver for communicating with a plurality of in-premises terminals (ITs) without creating interference outside an in-premises perimeter. Further, a method for operating an IS-OFDM system for ultra-wideband (UWB) wireless communications that suppresses narrow-band interference and provides local area networking services, in-premises distribution of broadcast cable channels and in-premises wireless access and routing to external networks is described, without creating interference outside an in-premises perimeter.Type: GrantFiled: March 12, 2012Date of Patent: August 6, 2013Assignee: AT&T Intellectual Property II, L.P.Inventors: Diakoumis Parissis Gerakoulis, Saeed S. Ghassemzadeh
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Patent number: 8498242Abstract: Techniques for transmitting beacon signals to assist user equipments (UEs) perform cell search and techniques for detecting for beacon signals are described. In an aspect, cells may be assigned beacon patterns defined based on orthogonal grouping of subcarriers. U subcarriers usable for beacon may be arranged into G orthogonal groups, with each group including S subcarriers. P=SG different beacon patterns may be defined based on the G groups of S subcarriers. In another aspect, the cells may transmit their beacon signals at configurable transmit power levels, which may be determined based on target beacon detection performance. In yet another aspect, a UE may perform overlapping DFTs in order to capture more received power when symbol timing at the UE is not aligned with symbol timing of cells being detected. In yet another aspect, the UE may perform beacon detection with maximal likelihood decoding.Type: GrantFiled: November 6, 2007Date of Patent: July 30, 2013Assignee: QUALCOMM IncorporatedInventors: Tao Luo, Durga Prasad Malladi, Hao Xu
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Patent number: 8498284Abstract: Enhancements are provided for the radio link control (RLC) protocol in wireless communication systems where variable RLC packet data unit (PDU) size is allowed. When flexible RLC PDU sizes are configured by upper layers, radio network controller (RNC)/Node B flow control, RLC flow control, status reporting and polling mechanisms are configured to use byte count based metrics in order to prevent possible buffer underflows in the Node B and buffer overflows in the RNC. The enhancements proposed herein for the RLC apply to both uplink and downlink communications.Type: GrantFiled: February 4, 2008Date of Patent: July 30, 2013Assignee: InterDigital Technology CorporationInventors: Diana Pani, James M. Miller, Paul Marinier, Stephen E. Terry, Sudheer A. Grandhi
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Patent number: 8494006Abstract: A method and apparatus for transmitting a downlink reference signal in a wireless communication system supporting multiple antennas is disclosed. A method for transmitting Channel State Information-Reference Signals (CSI-RSs) for eight or less antenna ports includes selecting one of a plurality of CSI-RS Resource Element (RE) groups defined on a data region of a downlink subframe and mapping CSI-RSs for the eight or less antenna ports to the selected CSI-RS RE group, and transmitting the downlink subframe in which the CSI-RSs for the eight or less antenna ports are mapped. The plurality of CSI-RS RE groups is defined such that a transmission diversity RE pair for data transmitted on the downlink subframe is not broken.Type: GrantFiled: January 14, 2011Date of Patent: July 23, 2013Assignee: LG Electronics Inc.Inventors: Dae Won Lee, Hak Seong Kim, Byoung Hoon Kim, Ki Jun Kim, Eun Sun Kim
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Patent number: 8488633Abstract: Dynamic time-spectrum block allocation for cognitive radio networks is described. In one implementation, without need for a central controller, peer wireless nodes collaboratively sense local utilization of a communication spectrum and collaboratively share white spaces for communication links between the nodes. Sharing local views of the spectrum utilization with each other allows the nodes to dynamically allocate non-overlapping time-frequency blocks to the communication links between the nodes for efficiently utilizing the white spaces. The blocks are sized to optimally pack the available white spaces.Type: GrantFiled: October 18, 2010Date of Patent: July 16, 2013Assignee: Microsoft CorporationInventors: Paramvir Bahl, Thomas Moscibroda, Gopala Sri Hari Narlanka, Yunnan Wu, Yuan Yuan, Ranveer Chandra
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Patent number: 8483039Abstract: A transmitting device for transmitting data and pilot symbols in an OFDM transmission system having transmission antennas. The device includes symbol generating means for generating data said pilot symbols, means for transmitting the data and pilot symbols using subcarriers of the OFDM system. The symbol generating means generates a first and second type pilot symbol, the second having an inverted value of the first so that a first pilot symbol pattern to be transmitted by using one of said plurality of transmission antennas has a different pattern in the frequency and time dimension from a second pilot symbol pattern to be transmitted by using another transmission antenna. First and second pilot symbols are comprised in respective first and second pilot symbol patterns, where at least some of the first and second pilot symbols have the same time allocation and being alternately identical and inverted to each other.Type: GrantFiled: April 11, 2011Date of Patent: July 9, 2013Assignee: Sony Deutschland GmbHInventors: Zhaocheng Wang, Richard Stirling-Gallacher
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Patent number: 8483235Abstract: Provided are a preamble structure and a channel estimation algorithm thereof. A communication method for a transmitter for channel estimation in a Multiple Input Multiple Output (MIMO) wireless communication system having N receiving antennas, includes generating a preamble interval having a short training field that includes a predetermined pattern iterated N times on a time domain and is used for compensating for a carrier frequency offset, and transmitting a packet having the preamble interval.Type: GrantFiled: December 10, 2008Date of Patent: July 9, 2013Assignee: Electronics and Telecommunications Research InstituteInventors: Minho Cheong, Sok-Kyu Lee, Seung-Chan Bang, Il-Gu Lee
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Patent number: 8472480Abstract: A communication system, including a transmitter that transmits a signal by using a two-dimensional spread code used for making a spread in time and frequency directions and a receiver that receives the signal transmitted from the transmitter, where the transmitter includes a selecting unit that selects spread codes in which at least one of the time and the frequency directions are mutually orthogonal, and a transmitting unit that spreads a signal by using the selected spread codes and transmits the signal, where each of the selected spread codes are able to be split in two or more parts, which are mutually orthogonal with the same parts of other selected spread codes in at least one of the time and the frequency directions.Type: GrantFiled: June 10, 2011Date of Patent: June 25, 2013Assignee: Fujitsu LimitedInventors: Tsuyoshi Shimomura, Dai Kimura, Tetsuya Yano
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Patent number: 8472414Abstract: A method including enabling a first mode of a first radio communications protocol using a shared radio frequency band and having a first defined schedule for communication in the shared radio frequency band; enabling a second mode of a second radio communications protocol using the shared radio frequency band and having a second defined schedule for communication in the shared radio frequency band; and enabling the first mode and disabling the second mode at a conflict time at which the first defined schedule and the second defined schedule coincide.Type: GrantFiled: January 11, 2008Date of Patent: June 25, 2013Assignee: Nokia CorporationInventors: Seemal Naphade Brandt, Kanji Kerai, Natividade Albert Lobo
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Patent number: 8463229Abstract: A system for managing wireless communication in view of other potentially interfering wireless signal sources. Signal-related information may be collected from one or more apparatuses that are participating in a network. The information may then be evaluated in order to determine expected signal activity in the environment in which the apparatuses are operating. In some instances the signal activity may then be compared to a scan schedule utilized, for example, to identify legacy apparatuses operating in the environment. This scan schedule may be altered to avoid potential conflicts that may exist with the expected signal activity. The scan schedule may then be communicated to the networked apparatuses.Type: GrantFiled: January 27, 2010Date of Patent: June 11, 2013Assignee: Nokia CorporationInventors: Jan Erik Suumäki, Zexian Li, Andrea Bacioccola
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Patent number: 8457062Abstract: A method performed in a wireless network includes receiving signals within a downlink frequency domain to enable channel estimation and measuring two or more signals only for two or more frequency bands of the downlink frequency domain that correspond to two or more uplink frequency bands associated with a scheduling grant or channel allocation that correspond to physical uplink channel frequency bands. The method also includes calculating path loss values for each of the frequency bands and calculating a total power based on the path loss values corresponding to the frequency bands. The method further includes determining a power allocation per frequency band based on the calculated total power to be applied to an uplink transmission and allocating the total power.Type: GrantFiled: September 15, 2008Date of Patent: June 4, 2013Assignee: Telefonaktiebolaget LM Ericsson (Publ)Inventors: Per Burström, Anders Furuskär, David Astely, Arne Simonsson
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Patent number: 8451792Abstract: The object is achieved by providing a base station apparatus for performing time and frequency scheduling in uplink packet access with: an interference amount measurement part configured to measure an uplink interference amount for each interference amount measurement unit which comprises a predetermined period and a predetermined number of frequency blocks; an interference amount determination part configured to determine whether the uplink interference amount satisfies a predetermined condition; and an overload indicator reporting part configured to report an overload indicator to a neighboring cell when the predetermined condition is satisfied.Type: GrantFiled: April 25, 2008Date of Patent: May 28, 2013Assignee: NEC CorporationInventors: Motohiro Tanno, Yoshihisa Kishiyama, Kenichi Higuchi, Mamoru Sawahashi, Toshifumi Sato
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Patent number: 8446885Abstract: Certain aspects of the present disclosure propose techniques and apparatus of fast system selection for a multimode terminal that can support both Time Division Synchronous Code Division Multiple Access (TD-SCDMA) technology and Global System for Mobile communications (GSM) technology.Type: GrantFiled: July 29, 2010Date of Patent: May 21, 2013Assignee: QUALCOMM IncorporatedInventors: Tom Chin, Guangming Shi, Kuo-Chun Lee
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Patent number: 8442002Abstract: For enhancing user throughput and coverage within a multi-cell radio system a method for operating a multi-cell radio system, especially an OFDMA-based radio system including a plurality of base stations, wherein different frequency reuse factors are used within different reuse zones of one cell by a fractional frequency reuse (FFR) scheme, the method includes the following steps: allocating a size or resource to the different reuse zones, and allocating users into different reuse zones. Further, a multi-cell radio system is described, preferably for carrying out the above mentioned method.Type: GrantFiled: September 7, 2009Date of Patent: May 14, 2013Assignees: NEC Europe Ltd., NEC CorporationInventors: Jun Zhou, Linghang Fan, Yuefeng Zhou, Tetsu Ikeda
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Patent number: 8432939Abstract: To assist in minimizing interference, a bandwidth range can have guards on either side to reduce leakage into neighboring bandwidth ranges. However, in relatively low power situations the risk of leakage is reduced. Therefore, the guard bandwidths can be used to open new channels upon which information can be transmitted. Thus, there can be a larger amount of bandwidth used while still retaining protective aspects, such as low interference to neighboring bands. Using the guard bandwidth to transmit new channels facilitates backward compatibility since legacy devices do not commonly monitor the guard bandwidth. These techniques can also be used at high power base stations by advertising a larger guard than necessary to legacy devices and using the additionally created guard bandwidth to transmit new channels.Type: GrantFiled: September 19, 2008Date of Patent: April 30, 2013Assignee: QUALCOMM IncorporatedInventors: Kapil Bhattad, Ravi Palanki
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Patent number: 8422437Abstract: A resource assignment method for a communication system provides a method to realize an estimate of channel with high accuracy for terminals which change channels rapidly. A resource assignment unit (102), supplied with channel information ISCI1 to NSCIN, determines assignment of resources to a first to a Nth terminals and outputs a resource assignment information SRA. A multiplex signal generating unit (103), supplied with the resource assignment information SRA, outputs a transmission signal STX. A resource selector (104), supplied with the channel information 1SCI1 to NSCIN and the relative position information SRP, determines the assignment of resources to the first to Nth terminals and outputs the resource assignment information SRA. A resource position generating unit (105), supplied with the resource assignment information SRA, calculates a relative position of an empty resource with respect to a multiplex position of a pilot signal and outputs the relative position information SRP.Type: GrantFiled: March 31, 2006Date of Patent: April 16, 2013Assignee: NEC CorporationInventor: Yoshikazu Kakura
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Patent number: 8416810Abstract: Provided is a base station capable of giving a pilot appropriate for both of multicast data and unicast data which are frequency-multiplexed. In a pilot generation unit (105) of the base station, an insertion unit (1051) inserts a pilot (common pilot) common to a plurality of cells to generate an orthogonal pilot sequence (2). In accordance with the insertion process in the insertion unit (1051), an insertion unit (1052) inserts a sequence (common sequence) common to a plurality of cells to a unique scrambling sequence to generate a scrambling sequence. A scrambling unit (1053) performs a scrambling process for multiplying the orthogonal pilot sequence (2) by the scrambling sequence. This scrambling process generates, in a part of pilot sequences different for respective cells, a pilot sequence containing a pilot common to the cells.Type: GrantFiled: January 18, 2007Date of Patent: April 9, 2013Assignee: Panasonic CorporationInventors: Isamu Yoshii, Akihiko Nishio, Masaru Fukuoka, Katsuhiko Hiramatsu
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Patent number: 8411661Abstract: A method and device for generating a Single-Carrier Frequency Division Multiple Access (SC-FDMA) signal having a transmission bandwidth and a Constant Amplitude Zero-Autocorrelation (CAZAC) sequence of length NCAZAC. The SC-FDMA signal is presumed to have a time-domain formulation with a term representative of an Inverse Discrete Fourier Transform (IDFT) of length M, where M>NCAZAC. A frequency-domain representation of the CAZAC sequence is mapped to NCAZAC of MSEQ frequency points, where NCAZAC<MSEQ<M, and the remaining frequency points are filled with zeros to obtain MSEQ frequency-domain samples. An IDFT of size MSEQ is applied to the resulting frequency-domain samples to obtain a sub-sampled time-domain representation of the CAZAC sequence, which is then up-sampled according to the transmission bandwidth to generate the SC-FDMA signal.Type: GrantFiled: September 15, 2010Date of Patent: April 2, 2013Assignee: Telefonaktiebolaget L M Ericsson (publ)Inventor: Dietmar Lipka
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Patent number: 8396042Abstract: A control apparatus for use in wireless communications includes an antenna unit having antennas, the number of the antennas being equal to a maximum allowable number of connections in a specific frequency band; and a controller for receiving a connection request signal from each terminal attempting to connect to the control apparatus via the antenna unit, and transmitting and receiving a data signal to and from each terminal connected to the control apparatus by using a multiple-input-multiple-output scheme. The controller transmit and receive the data signal to and from each terminal connected to the control apparatus by obtaining a signal value of each antenna based on a predicted channel matrix and the number and types of terminals connected to the control apparatus via the antenna and separating the data signal for each terminal from the signal value according to the multiple-input-multiple-output scheme.Type: GrantFiled: June 5, 2009Date of Patent: March 12, 2013Assignee: Electronics and Telecommunications Research InstituteInventors: Kyeongpyo Kim, Jin Kyeong Kim, Woo Yong Lee, Yong Sun Kim, Nae-Soo Kim, Cheol Sig Pyo
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Patent number: 8396022Abstract: A method for processing a source routed packet comprises determining a next node in a source route for a source routed packet in a mesh network and transmitting the source routed packet to the next node in the source route. A method for creating a source routed packet comprises determining a source route path to a destination node and transmitting a source routed packet that includes the source route path to a first node associated with the source route path.Type: GrantFiled: October 17, 2008Date of Patent: March 12, 2013Assignee: Dust Networks, Inc.Inventors: William Alan Lindsay, Lance R. Doherty
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Patent number: 8396035Abstract: A system and method for communications using time-frequency space enabled coordinated beam switching are provided. A method for transmitting information includes selecting a beam from a set of beams, determining a set of users out of a plurality of users, the set of users preferring the selected beam and for each user in the set of users, selecting a first available subframe-subband pair that maximizes the user's channel quality. The method also includes scheduling the selected subframe-subband pairs, and transmitting information related to the scheduled subframe-subband pairs to the users in the set of users.Type: GrantFiled: April 15, 2010Date of Patent: March 12, 2013Assignee: Futurewei Technologies, Inc.Inventors: Cornelius van Rensburg, Patrick Ahamad Hosein
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Patent number: 8379590Abstract: Respective demodulation reference signals (DM RS) of a user bandwidth can be cyclically shifted with respect to each other. An uplink scheduling grant may include an index for a DM RS resource having a cyclic shift and an orthogonal cover code or interleaved frequency division multiple comb. A usage orthogonal cover or interleaved frequency division multiple comb may be configured using radio resource control message and may optionally be tied statically into DM RS resources. At least some of respective demodulation reference signals of the at least two user bandwidths may be mutually orthogonal.Type: GrantFiled: October 20, 2008Date of Patent: February 19, 2013Assignee: Nokia Siemens Networks OyInventors: Kari Juhani Hooli, Kari Pekka Pajukoski, Esa Tapani Tiirola
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Patent number: 8379506Abstract: System and method for providing multiple access in a multi-band, orthogonal frequency division multiplexed (multi-band-OFDM) communications system. A preferred embodiment comprises determining a transmission bandwidth to support a performance requirement and configuring transmission bands in the multi-band-OFDM communications system based upon the transmission bandwidth, wherein the transmission bands may be made up of smaller transmission bands bonded together. Further comprising initializing communications with the configured transmission bands. The use of bonded transmission bands can provide increased data rates and/or increased range performance.Type: GrantFiled: October 1, 2009Date of Patent: February 19, 2013Assignee: Texas Instruments IncorporatedInventors: Jaiganesh Balakrishnan, Anuj Batra, Anand G. Dabak
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Patent number: 8374619Abstract: Embodiments of the invention provide for allocating spectrum in a wireless communication system that supports simultaneously at least a first mode of operation and a second mode of operation. Logic is arranged for determining a proportion of spectrum required for the wireless communication unit to operate simultaneously in both the first mode of operation and the second mode of operation. Logic for allocating spectrum allocates a temporary guard band between a first portion of spectrum for the first mode of operation and a second portion of spectrum for the second mode of operation for use while the wireless communication unit operates simultaneously in the first mode of operation and second mode of operation.Type: GrantFiled: June 24, 2010Date of Patent: February 12, 2013Assignee: Nvidia CorporationInventors: Alan Edward Jones, Peter Bruce Darwood, Paul Howard
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Patent number: 8374257Abstract: The present disclosure relates generally to a system and method for superposition coding and interference cancellation in a multiple input multiple output (MIMO) system. In one example, the method includes demultiplexing a signal of a user into at least first and second signal portions and demultiplexing a signal of another user into at least third and fourth signal portions. Superposition coding is performed on the first and third signal portions to form a first composite signal and performed on the second and fourth signal portions to form a second composite signal. The first composite signal is transmitted via at least one antenna of a MIMO system and the second composite signal is transmitted via at least another antenna of the MIMO system.Type: GrantFiled: April 23, 2007Date of Patent: February 12, 2013Assignee: Samsung Electronics Co., Ltd.Inventors: Farooq Khan, Jiann-An Tsai, Cornelius Van Rensberg
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Patent number: 8374156Abstract: The present patent application improves DARP by allowing multiple users on one time slot (MUROS). It comprises means and instructions for sharing signals on a single channel, comprising setting up a new connection, allocating a new time slot if there is an unused time slot on a channel frequency, selecting an used time slot for the new connection to share with an existing connection if there is not an unused time slot on the channel frequency, and selecting a different training sequence code for the new connection if the used time slot on the channel frequency has been selected for the new connection to share with an existing connection.Type: GrantFiled: August 20, 2010Date of Patent: February 12, 2013Assignee: Qualcomm IncorporatedInventors: Zhi-Zhong Yu, Mukund Agarwal, Mungal Singh Dhanda, Simon Walke
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Patent number: 8369214Abstract: The present invention relates to a method of transmitting and receiving data in soft handoff of a wireless communication system. According to an aspect of the present invention, in the method of receiving data in soft handoff of a wireless communication system, a mobile station receives a first sequence being generated by interleaving transmission data using a first interleaver pattern, and also receives a second sequence being generated by interleaving the transmission data using a second interleaver pattern. Then, the mobile station combines and decodes the first sequence and the second sequence before receiving an entire frame having the first sequence allocated thereto.Type: GrantFiled: September 21, 2009Date of Patent: February 5, 2013Assignee: LG Electronics Inc.Inventors: Ki Jun Kim, Byung Kwan Yi, Sang Gook Kim, Dong Wook Roh
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Patent number: 8358632Abstract: A method for accessing a reverse channel for communication from a remote unit to a base station is disclosed. The method includes waiting a random period of time in response to determining that the reverse channel is available at a first time. The method also includes monitoring a forward channel after expiration of the random period of time to determine whether the reverse channel is available at a second time. The method further includes transmitting a first portion of data on the reverse channel in response to determining that the reverse channel is available at the second time.Type: GrantFiled: December 28, 2009Date of Patent: January 22, 2013Assignee: AT&T Mobility II LLCInventors: Kevin M. Boyd, Salvador Garcia, Jr., Eamonn Gormley, Anh Nguyen