Time Division (tdma) Patents (Class 370/321)
  • Patent number: 8982770
    Abstract: Provided is a wireless relay system that improves system throughput between terminal stations and flexibly makes system throughput variable with respect to short-term traffic fluctuations. In the wireless relay system, a plurality of relay stations relay communication between two terminal stations that perform random access. The terminal stations and the relay stations include a slot synchronization unit, a time synchronization unit, and a transmission unit. The slot synchronization unit synchronizes slot timing of a time slot indicating a unit time. The time synchronization unit performs time synchronization for synchronization of the slot timing. The transmission unit transmits a transmission packet to a wireless line in synchronization with the slot timing.
    Type: Grant
    Filed: September 28, 2010
    Date of Patent: March 17, 2015
    Assignee: Nippon Telegraph and Telephone Corporation
    Inventors: Takatoshi Sugiyama, Daisuke Umehara, Masaaki Tanaka
  • Patent number: 8982848
    Abstract: The present invention relates to transmitting a downlink reference signal in a wireless communication system. A method for a base station to transmit a downlink signal by using two or more layers includes multiplexing and transmitting a reference signal for the two or more layers on the basis of a reference signal pattern on a data region of a downlink subframe and transmitting data for the two or more layers on the data region of the downlink subframe, wherein the reference signal for the two or more layers is a dedicated reference signal that is used to demodulate the data for the two or more layers on a receiving end, and in the multiplexing of the reference signal, the reference signal for the two or more layers is code-division-multiplexed by an orthogonal code having a length of at least 2.
    Type: Grant
    Filed: July 19, 2010
    Date of Patent: March 17, 2015
    Assignee: LG Electronics Inc.
    Inventors: Hyun Soo Ko, Jae Hoon Chung, Bin Chul Ihm, Moon Il Lee
  • Patent number: 8976727
    Abstract: Techniques for improving data rates at mobile terminals that are subject to periodic channel interruptions in a beyond-line-of-sight communication system are disclosed, including improved encoding and decoding systems that identify blockages and modify receiver operation during blockages to reduce data errors. In certain embodiments, encoding, symbol mapping, interleaving, and use of unique periodic identifiers function to enable a series of packets that may be received in a blockage impaired channel with reduced errors.
    Type: Grant
    Filed: July 2, 2012
    Date of Patent: March 10, 2015
    Assignee: ViaSat, Inc.
    Inventors: Donald Wilcoxson, John O'Neill, Daniel Chester, Brian Sleight, Changping Li
  • Patent number: 8977325
    Abstract: The present invention provides a method and a system for processing cell sleeping. The method comprises: a cell sending a sleeping request message to a neighbor cell (S102); according to the sleeping request message, the neighbor cell sends a corresponding sleeping response message to the cell (S104); according to the sleeping response message, the cell decides to perform sleeping or not (S106). The present invention ensures the continuity of user communication.
    Type: Grant
    Filed: March 15, 2011
    Date of Patent: March 10, 2015
    Assignee: ZTE Corporation
    Inventors: Jianmin Fang, Feng He, Yin Gao
  • Patent number: 8976776
    Abstract: In operation, a transmitting device selects a synchronization pattern associated with the desired timeslot that is at least mutually exclusive from synchronization patterns associated with other timeslots on the same frequency in the system. Once selected, the transmitting device transmits a burst embedding the synchronization pattern that was selected, where appropriate. If the receiving device detects the synchronization pattern, it immediately synchronizes with the timeslot with confidence that it is synchronizing to the desired timeslot by using sets of synchronization patterns associated with the desired timeslot that are at least mutually exclusive from synchronization patterns associated with the other timeslots on the same frequency.
    Type: Grant
    Filed: September 4, 2012
    Date of Patent: March 10, 2015
    Assignee: Motorola Solutions, Inc.
    Inventors: David G. Wiatrowski, Dipendra M. Chowdhary, Thomas B. Bohn
  • Patent number: 8966046
    Abstract: An ad hoc network having self-organized clusters of nodes, i.e., one-hop ad hoc subnetworks. Any node can assume the role of a routing node if it is able to communicate with at least one node in another cluster so as to self-organize the clusters of nodes into a multi-hop ad hoc network. An intra-cluster synchronization of sleep and awake periods of nodes in a power-saving mode of operation is performed separately within each cluster. An inter-cluster synchronization of awake periods of neighboring clusters to be temporally non-overlapping is performed by the routing nodes.
    Type: Grant
    Filed: June 9, 2011
    Date of Patent: February 24, 2015
    Assignee: Defendec Inc.
    Inventors: Jürgo-Sören Preden, Madis Uusjärv
  • Patent number: 8953588
    Abstract: Mobile communication data received at the sending based transceiver station via a radio frequency transmission is received a packet data network from a sending base transceiver station. The mobile communication data is forwarded to a base station controller via an interface defined at least in part by a third party base station controller vendor.
    Type: Grant
    Filed: September 5, 2006
    Date of Patent: February 10, 2015
    Assignee: Broadcom Corporation
    Inventors: Elliott Hoole, Steve McMeekin, William M. Stevens, Donald P. Wahlstrom, Yan Zhang
  • Patent number: 8953517
    Abstract: A system and method for adapting code rate are provided. A method for a first communication device to transmit a resource assignment to at least one communication device includes assigning at least one transmission resource to transmit the resource assignment, adapting a code rate of an encoded payload based on the at least one transmission resource and a threshold, thereby producing an adapted payload, and transmitting the adapted payload.
    Type: Grant
    Filed: June 21, 2011
    Date of Patent: February 10, 2015
    Assignee: Futurewei Technologies, Inc.
    Inventors: Anthony Soong, Philippe Sartori, Brian Classon, Zhongfeng Li, Zhengwei Gong
  • Patent number: 8948081
    Abstract: Some demonstrative embodiments include devices, systems and/or methods of multiple-stream wireless communication. For example, an apparatus may include a wireless communication unit to perform wireless peer-to-peer (P2P) communication according to a time allocation scheme defining a plurality of scheduled allocations (teeth) for wireless P2P communication within a wireless communication network based on a predefined priority scheme, which assigns a plurality of priorities to a plurality of streams corresponding to a plurality of service types, wherein a tooth may be scheduled for P2P communication between a pair of endpoints of the wireless communication network, and wherein the tooth includes one or more contiguous portions (slices), a slice having a predefined duration allocated for communication of one or more streams having the same priority.
    Type: Grant
    Filed: September 27, 2012
    Date of Patent: February 3, 2015
    Assignee: Intel Corporation
    Inventors: Eran Sudak, Solomon B. Trainin, Ophir Edlis, Ran Mor, Oren Kedem
  • Patent number: 8948080
    Abstract: Systems and methods of satellite communications for moving terminals, including but not limited to on-the-move and mobile terminals (e.g., on-the-pause terminals), are implemented in certain embodiments using smaller antennas (e.g., aperture area with diameter less than 50 cm), open standard waveforms to secure availability from several suppliers, payment for service only when using the terminal, interference avoidance to adjacent satellites, and low cost. Low cost is achieved in part by operating at frequency bands that are currently operated by terrestrial microwave links so that existing low cost microwave components are utilized. The system also includes an interference elimination system that continuously monitors for interference to adjacent satellites from a user terminal's uplink signal.
    Type: Grant
    Filed: July 17, 2007
    Date of Patent: February 3, 2015
    Assignee: OverHorizon (Cyprus) PLC
    Inventors: Per Wahlberg, Kennet Lejnell
  • Patent number: 8942327
    Abstract: The present invention employs hierarchical modulation to simultaneously transmit information on different modulation layers using a carrier RF signal. Initially, first data to be transmitted is assigned to a first modulation layer and second data is assigned to a second modulation layer. In one embodiment of the present invention, the first and second data are assigned based on reliability criteria. The first and second modulation layers are hierarchical modulation layers of the carrier RF signal. Once assigned, the first data is transmitted using the first modulation layer of the carrier RF signal and the second data is transmitted using the second modulation layer of the carrier RF signal. In one embodiment of the present invention, information may be transmitted to one end user using one modulation layer, and information may be transmitted to a different end user using a different modulation layer.
    Type: Grant
    Filed: October 11, 2012
    Date of Patent: January 27, 2015
    Assignee: Apple Inc.
    Inventors: Ming Jia, Jianglei Ma, Peiying Zhu, Wen Tong, Curt Dodd
  • Patent number: 8929901
    Abstract: A method, NodeB and User Equipment for TDD operation in a communication system operating in TDD mode in a frequency band allocated for FDD operation. Preferably, operation is in TDD uplink and downlink mode in a first frequency band designated or normally used for FDD uplink communication, and in TDD downlink-only mode in a second frequency band designated or normally used for FDD downlink communication. The invention provides the following advantages: Provides a flexible method to deploy a time division duplex architecture in frequency division duplex spectrum. Allows flexible use of system capacity by adjusting the uplink and downlink capacity split. Removes previous FDD duplex restrictions.
    Type: Grant
    Filed: October 1, 2013
    Date of Patent: January 6, 2015
    Assignee: Sony Corporation
    Inventors: William John Jones, Joseph Chung Shing Cheung, Alan Edward Jones
  • Patent number: 8929279
    Abstract: A system and method for improving efficiency of satellite communications is described. In one embodiment, efficient satellite communications is enabled through event-driven reporting by a mobile terminal.
    Type: Grant
    Filed: April 9, 2012
    Date of Patent: January 6, 2015
    Assignee: SkyBitz, Inc.
    Inventors: Rich Battista, Jay Brosius, Uday Shankar
  • Patent number: 8929900
    Abstract: A method, NodeB and User Equipment for TDD operation in a communication system operating in TDD mode in a frequency band allocated for FDD operation. Preferably, operation is in TDD uplink and downlink mode in a first frequency band designated or normally used for FDD uplink communication, and in TDD downlink-only mode in a second frequency band designated or normally used for FDD downlink communication. The invention provides the following advantages: Provides a flexible method to deploy a time division duplex architecture in frequency division duplex spectrum. Allows flexible use of system capacity by adjusting the uplink and downlink capacity split. Removes previous FDD duplex restrictions.
    Type: Grant
    Filed: December 28, 2010
    Date of Patent: January 6, 2015
    Assignee: Sony Corporation
    Inventors: William J. Jones, Joseph C. Cheung, Alan E. Jones
  • Patent number: 8913548
    Abstract: A frame structure supporting a relay and a method of transmitting control information for supporting a relay system are disclosed. The method of transmitting control information for supporting a relay system comprises configuring a frame to which the relay system is applied; and transmitting a first message to one or more of a mobile station and relay stations, the first message including offset information indicating a beginning time of the frame and zone allocation information indicating configuration of the frame. In this case, a downlink zone of the frame includes a downlink transmit zone and a downlink access zone.
    Type: Grant
    Filed: December 3, 2009
    Date of Patent: December 16, 2014
    Assignee: LG Electronics Inc.
    Inventors: Ae Ran Youn, Jin Sam Kwak, Kyu Jin Park, Ji Wook Chung
  • Patent number: 8914024
    Abstract: A method and application for mobile phone users provides an ability to discover personal attributes including photo of other individuals in vicinity covered by a short range wireless network, such as Bluetooth or similar signals operating in a wireless free spectrum, such as WiFi. The users can elect to exchange, send or receive contact information with ones that are in the vicinity that includes photos.
    Type: Grant
    Filed: January 9, 2009
    Date of Patent: December 16, 2014
    Assignee: Ximoxi, Inc.
    Inventor: Ramzi Alharayeri
  • Patent number: 8908669
    Abstract: Time division multiplexed input signals (i.e., separated into time slots) are spread in each time slot with a destination code. This spreading is applied for destination identification as opposed to signal information modulation. Each spreading signal is associated with a particular destination for a particular time slot. These spread signals are then combined on a code division bus. Output signals for retransmission to the destinations are recovered from the bus by application of despreading codes. Each despread signal has a destination code which appears in its individual time slot. In a variant code division multiplexed signals are directed to a destination by use of time slot interchanger to achieve time division switching to route the CDMA multiplexed channels.
    Type: Grant
    Filed: August 13, 2012
    Date of Patent: December 9, 2014
    Assignee: AT&T Intellectual Property II, L.P.
    Inventor: Diakoumis Parissis Gerakoulis
  • Patent number: 8908572
    Abstract: A method and an apparatus for obtaining information from a target base station are disclosed. The method includes: when a source base station needs to obtain information from a target base station, receiving, through an air interface, a system message in a certain format broadcast by the target base station; and parsing the system message, and obtaining required information. Through the present invention, an LTE base station can communicate with another LTE base station or with a heterogeneous base station directly through an air interface, thereby increasing the efficiency of communication between base stations.
    Type: Grant
    Filed: April 13, 2012
    Date of Patent: December 9, 2014
    Assignee: Huawei Technologies Co., Ltd.
    Inventor: Jianbo Li
  • Patent number: 8908659
    Abstract: Methods and apparatus of slot time synchronization for coexistence of 5 MHz, 10 MHz, and 20 MHz systems in TV white space are provided. The methods and apparatus extend concepts used in traditional 802.11 applications in the MAC layer so that networks that overlap in frequency and space can have access opportunities to TV white space channels. Several passive mechanisms are described which use bits of traditional 802.11 MAC Management Protocol Data Units to receive information related to the slot time of other overlapped networks. An active approach is described that uses measurements from a radio resource measurement service to adjust the slot time of stations in a network to that of the lowest bandwidth overlapped network in frequency and space.
    Type: Grant
    Filed: May 10, 2011
    Date of Patent: December 9, 2014
    Assignee: Thomson Licensing
    Inventors: Hou-Shin Chen, Wen Gao
  • Patent number: 8902872
    Abstract: A first mobile station configured to operate, in an ad-hoc network, with a second mobile station. The first mobile station includes a transceiver configured to receive a beacon. The beacon indicates a first time slot allocated to the first mobile station and a second time slot allocated to the second mobile station. During the first time slot only the first mobile station is permitted to transmit data. During the second time slot only the second mobile station is permitted to transmit data. A medium access control device is configured to transition the first mobile station from a lower power mode to an active mode prior to the transceiver receiving the beacon, and maintain the first mobile station in the active mode during both the first time slot and the second time slot regardless of whether the first mobile station is receiving data transmitted by the second mobile station.
    Type: Grant
    Filed: September 10, 2012
    Date of Patent: December 2, 2014
    Assignee: Marvell International, Ltd.
    Inventor: Timothy Donovan
  • Patent number: 8897718
    Abstract: A method of provisioning a communications link between remote terminals within a hub-spoke network comprising receiving, by a first remote terminal, information about a second remote terminal from a hub, selecting, by the first remote terminal, a modulation factor, coding rate, symbol rate, center frequency, and power level based on the information received about the second remote terminal, transmitting, by the first remote terminal, a signal using at least one of the selected modulation factor, coding rate, symbol rate, center frequency, and power level, to the second remote terminal such that a communications link is created, and adjusting the modulation factor, coding rate, symbol rate, center frequency, or power level of the transmitted signal such that performance of the link is increased while maintaining a presence of the link.
    Type: Grant
    Filed: May 6, 2014
    Date of Patent: November 25, 2014
    Assignee: Comtech EF Data Corp.
    Inventors: Vasile Manea, Michael Beeler, Frederick Morris, Jeffery Harig
  • Patent number: 8886200
    Abstract: Ambiguity (e.g., confusion) associated with access point identifiers may be resolved by querying candidate target access points and/or by using historical records indicative of one or more access points that the access point has previously accessed. For example, messages may be sent to access points that are assigned the same identifier to cause the access points to monitor for a signal from an access terminal that received the identifier from a target access point. The target access point may then be identified based on any responses that indicate that a signal was received from the access terminal. A mapping may be maintained for that access terminal that maps the identifier to that access point so that the mapping may be used to resolve any future confusion associated with the use of that identifier by that access terminal.
    Type: Grant
    Filed: September 16, 2009
    Date of Patent: November 11, 2014
    Assignee: QUALCOMM Incorporated
    Inventors: Aleksandar M. Gogic, Chandrasekhar T. Sundarraman, Sanjiv Nanda, Peerapol Tinnakornsrisuphap, Rajarshi Gupta
  • Patent number: 8879635
    Abstract: Apparatus and methods of using content information for encoding multimedia data are described. A method of processing multimedia data includes obtaining content information of multimedia data, and encoding the multimedia data so as to align a data boundary with a frame boundary in a time domain, wherein said encoding is based on the content information. In another aspect, a method of processing multimedia data includes obtaining a content classification of the multimedia data, and encoding blocks in the multimedia data as intra-coded blocks or inter-coded blocks based on the content classification to increase the error resilience of the encoded multimedia data. Apparatus that can process multimedia data described in these methods are also disclosed.
    Type: Grant
    Filed: September 26, 2006
    Date of Patent: November 4, 2014
    Assignee: Qualcomm Incorporated
    Inventors: Vijayalakshmi Rajasundaram Raveendran, Gordon Kent Walker, Tao Tian, Phanikumar Kanakadurga Bhamidipati, Fang Shi, Peisong Chen, Sitaraman Ganapathy Subramania, Seyfullah Halit Oguz
  • Patent number: 8862078
    Abstract: A method for communication in a communication terminal having a single communication module and at least two Subscriber Identification Module (SIM) cards is provided. The method includes performing a first call mode when a call is connected through a first base station in a standby mode by using the communication module and a first SIM card through a first time slot in each frame allocated by the first base station, and performing, when a second call is connected through a second base station while performing the first call mode, a second call mode using the communication module and a second SIM card through a second time slot in each frame allocated by the second base station, the second time slot being spaced apart from the first time slot.
    Type: Grant
    Filed: October 13, 2011
    Date of Patent: October 14, 2014
    Assignee: Samsung Electronics Co., Ltd.
    Inventor: Ga Ram Yu
  • Patent number: 8856605
    Abstract: A method is provided for transmitting data to user equipments, a communication system, a base station and a mobile station. Data is transmitted to user equipments from a first base station (BBS) and from second base stations (CBS) in a time division multiplexed manner in frames (F). Each frame (F) has a first sub-frame and a second sub-frame. The user equipments are located in cells, each cell a second base station (CBS). Data is transmitted wirelessly, during a first sub-frame of a frame, data from the first base station (BBS) to user equipments in a plurality of cells. Data is transmitted wirelessly, during the second sub-frame of the frame (F), from second base station (CBS) to at least one the plurality of user equipments. The data being transmitted from the first base station (BBS) is also transmitted by the second base station (CBS) to at least one of the plurality of cells.
    Type: Grant
    Filed: February 11, 2009
    Date of Patent: October 7, 2014
    Assignee: Nokia Siemens Networks Oy
    Inventors: Jijun Luo, Egon Schulz, Wolfgang Zirwas
  • Patent number: 8831034
    Abstract: A solution for extending the cell range and in particular for a solution for handling timing alignment is presented herein. The solution comprises determining a distance between user equipment and a radio access network node. User equipment located at a distance related to a pre defined timing advance value is scheduled to handle uplink communication so as to arrive at a later time slot for reducing the risk of conflicting with other transmissions towards the access node.
    Type: Grant
    Filed: September 22, 2010
    Date of Patent: September 9, 2014
    Assignee: Telefonaktiebolaget LM Ericsson (Publ)
    Inventors: Tobias Tynderfeldt, Dirk Gerstenberger, Fredrik Huss, Daniel Larsson
  • Patent number: 8817659
    Abstract: Disclosed is a method of switching modes in a serial data communication network comprising a plurality of interconnected nodes, each of said nodes comprising a plurality of mode-dependent configurations, the method including, during a first mode, issuing an instruction to said nodes, said instruction identifying a next mode of the data communication network; terminating said first mode; and following said termination, reconfiguring each of said nodes in accordance with the configuration corresponding to said next mode identified by said instruction. A serial data communication network implementing such a method is also disclosed.
    Type: Grant
    Filed: December 21, 2010
    Date of Patent: August 26, 2014
    Assignee: NXP B.V.
    Inventors: Andre Krijn Nieuwland, Jan Staschulat, Elisabeth Francisca Maria Steffens, Hubertus Gerardus Hendrikus Vermeulen
  • Patent number: 8817848
    Abstract: A distributed antenna system includes a master unit including a downlink RF input operable to receive an RF input signal from a downlink port of a base station, a first optical port, and a second optical port. The distributed antenna system also includes a first remote unit coupled to the first optical port. The first remote unit comprises a downlink antenna port and a first uplink antenna port and a second remote unit coupled to the second optical port of the master unit. The second remote unit comprises a downlink antenna port and a second uplink antenna port. The master unit is operable to transmit a first RF signal associated with the first RF uplink signal to a first uplink port of the base station and transmit a second RF signal associated with the second RF uplink signal to a second uplink port of the base station.
    Type: Grant
    Filed: September 4, 2012
    Date of Patent: August 26, 2014
    Assignee: Dali Systems Co. Ltd.
    Inventors: Paul Lemson, Shawn Patrick Stapleton, Sasa Trajkovic
  • Patent number: 8811507
    Abstract: Systems, methods, and devices for wireless communication. In one aspect, an apparatus for wireless communication is provided. The apparatus includes a receiver configured to receive a wireless signal comprising a packet over a bandwidth. The packet includes a preamble portion comprising a signaling (SIG) field. A first portion of the SIG field is received over a first bandwidth within the bandwidth. A second portion of the SIG field is received after the first portion, the second portion received over a second bandwidth within the bandwidth. The first bandwidth is different than the second bandwidth, The second portion is replicated at least once within the bandwidth. The apparatus further includes a processor configured to evaluate the wireless signal including at least one of the first or second portions of the SIG field.
    Type: Grant
    Filed: February 28, 2013
    Date of Patent: August 19, 2014
    Assignee: QUALCOMM Incorporated
    Inventors: Eugene J. Baik, Sameer Vermani
  • Patent number: 8805368
    Abstract: An approach is provided for interworking between radio access networks that utilize different radio access technologies. Loading information of a plurality of radio access networks that are accessible by a terminal is determined. A list of candidates from the radio access networks are output based on the loading information for use by the terminal.
    Type: Grant
    Filed: July 2, 2013
    Date of Patent: August 12, 2014
    Assignee: Verizon Patent and Licensing Inc.
    Inventors: Yee Sin Chan, Jin Yang
  • Patent number: 8804606
    Abstract: In a satellite-based communication network comprised of a central hub and plurality of remote terminals configured to transmit data to and receive data from the central hub in accordance with EN 301 790 (DVB-RCS), and where one or more of these remote terminals may be configured to include an additional receiver module configured to receive MF-TDMA transmission of other remote terminals, a mesh receiver and methods for coupling the mesh receiver with the host remote terminal. In addition, described herein are methods for synchronizing the mesh receiver on the network's timing and frequency and for utilizing the available link power for achieving efficient connectivity.
    Type: Grant
    Filed: August 10, 2009
    Date of Patent: August 12, 2014
    Assignee: Gilat Satellite Networks Ltd.
    Inventors: Snir Brener, Eran Haccoon, Haim Halfon, Guy Levitas
  • Patent number: 8804604
    Abstract: Methods, systems and apparatuses are provided for transmitting and receiving space-time block coded data in a wireless communications system with co-operative relays. A source node transmits RF signals representing first and second sets of data symbols in respective first and second channels (in time frequency code or any combination) of a wireless communications system, the first and second sets of data symbols being for transmission from separate antennas respectively according to a space-time block code. A relay node receives the RF signals representing the first set of data symbols in the first channel and transmits RF signals representing the first set of data symbols in the second channel. A destination node received the RF signals representing the second set of data symbols from the source node and the RF signals representing the first set of data symbols from the relay node.
    Type: Grant
    Filed: June 27, 2013
    Date of Patent: August 12, 2014
    Assignee: Apple Inc.
    Inventor: James Mark Naden
  • Patent number: 8804605
    Abstract: Systems and methods are disclosed for feeder link configurations to layered modulation. One feeder link system employs feeder link spot beam to antennas in distinct coverage areas to enable frequency reuse. Another system employs narrow beam width feeder link antenna to illuminate individual satellites also enabling frequency reuse. Yet another system uses layered modulation in the feeder link. Another feeder link system employs a higher order synchronous modulation for the satellite feeder link than is used in the layered modulation downlink signals.
    Type: Grant
    Filed: August 31, 2012
    Date of Patent: August 12, 2014
    Assignee: The DIRECTV Group, Inc.
    Inventors: Paul R. Anderson, Joseph Santoru, Ernest C. Chen
  • Patent number: 8797896
    Abstract: A method for wireless communication comprises a donor enhanced Node B (eNB) transmitting system information for a subframe structure to a relay node (RN), which information comprises radio resource configuration and/or timing information for uplink backhaul transmission. The RN uses an automatic method to select the Round Trip Time (RTT) value for the Hybrid Automatic Repeat request (HARQ) on the uplink backhaul (Un) relay link. The RTT value is implicitly determined according to the Un (backhaul) subframe or MBSFN subframe configuration periodicity. The RTT option is signaled by the Un subframe configuration period of the MBSFN Un downlink signals.
    Type: Grant
    Filed: August 18, 2011
    Date of Patent: August 5, 2014
    Assignee: Futurewei Technologies, Inc.
    Inventors: Zhongfeng Li, Philippe Sartori
  • Patent number: 8798014
    Abstract: Disclosed are a data transmission method and device in a carrier aggregation system, used for realizing the data transmission of UE which does not support uplink and downlink transmission simultaneously in a carrier aggregation system which uses different TDD uplink and downlink configurations. The data transmission method in a carrier aggregation system provided in the present application includes: an eNB performing data transmission with specific user equipment (UE) according to the time division duplex (TDD) uplink and downlink sub-frame configuration employed by a specific component carrier in a carrier aggregation system by means of a component carrier in the carrier aggregation system, wherein said specific UE is TDDUE which does not support simultaneously performing uplink data transmission and downlink data transmission in an identical sub-frame.
    Type: Grant
    Filed: July 2, 2012
    Date of Patent: August 5, 2014
    Assignee: China Academy of Telecommunications Technology
    Inventors: Xueming Pan, Zukang Shen, Yanan Lin
  • Patent number: 8797942
    Abstract: Random access coverage is assured while at the same time supporting high uplink data rates in a same service area served by a base station. A set of radio resources are shared by multiple mobile terminals for transmitting uplink to the base station including requests for access to service from the base station and transmissions for active connections with the base station. A first repeating time period and a second different repeating time period are defined. Uplink transmission grants are scheduled for active connections that permit use of a greater amount of the radio resources during the first repeating time period. Uplink transmission grants are also scheduled for active connections that permit use of a smaller amount of those resources during the second repeating time period. At least some random access requests to the base station are controlled to occur only during the second repeating time period.
    Type: Grant
    Filed: September 25, 2009
    Date of Patent: August 5, 2014
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Mats Blomgren, Fredrik Gunnarsson, Bo Hagerman, Klas Johansson
  • Patent number: 8792470
    Abstract: The invention relates to a method for activating and maintaining a plurality of separate and distanced functional units in an aircraft cabin. According to the invention, a wireless network comprising a plurality of nodes is initialized, wherein each node is associated with a device wherein said initializing comprises associating each node a sending time slot within a time frame using a TDMA synchronization scheme, wherein each node is active to send signals during its sending time slot and is active to receive signals during a first set of time slots comprising a number of time slots of said frame, wherein the sending time slot of a node is different from the sending time slots of at least a plurality of its neighbored nodes.
    Type: Grant
    Filed: February 22, 2012
    Date of Patent: July 29, 2014
    Assignee: Zodiac Aerotechnics
    Inventors: Wolfgang Rittner, Rudiger Meckes, Peter Glosekotter, Gunter Boomgaarden
  • Patent number: 8787248
    Abstract: An echo cancellation wireless repeater with first and second antenna arrays having vertical and horizontal feed antenna elements selects a combination of antenna elements for reception and transmission to reduce interference and improve the quality of signal reception. In one embodiment, the antenna elements are switchably connected to transceiver circuits and a combination of antenna elements is selected based on the best desired performance result. In another embodiment, the antenna elements are each connected to its own transceiver circuit and the echo cancellation repeater performs beamforming in baseband to select a combination of antenna elements.
    Type: Grant
    Filed: June 7, 2011
    Date of Patent: July 22, 2014
    Assignee: QUALCOMM Incorporated
    Inventors: James Arthur Proctor, Jr., Kenneth M. Gainey, Steven J. Howard, Hakan Inanoglu
  • Patent number: 8768257
    Abstract: Provided are a method and an apparatus for releasing a blank zone by a macro base station in a wireless communication system. The macro base station: receives channel information from a macro terminal that is serviced therefrom; determines based on the channel information whether or not a downlink blank zone allocated to a resource zone of a femto bas station is released; and transmits downlink blank zone release information to the femto base station if the downlink blank zone is supposed to be released. The downlink blank zone is a resource zone which restricts the downlink transmission, among all the resource zones used by the femto base station. The channel information may be the information about the distance between the femto base station and the macro terminal.
    Type: Grant
    Filed: December 8, 2009
    Date of Patent: July 1, 2014
    Assignee: LG Electronics Inc.
    Inventors: Han Gyu Cho, Doo Hyun Sung
  • Patent number: 8750151
    Abstract: Techniques to calibrate downlink and uplink channels to account for differences in the frequency responses of transmit and receive chains are described. In one embodiment, pilots are transmitted on downlink and uplink channels and used to derive estimates of the downlink and uplink channel responses, respectively. Sets of correction factors are then determined based on estimates of downlink and uplink channel responses. A calibrated downlink channel is formed using a first set of correction factors for the downlink channel, and a calibrated uplink channel is formed using a second set of correction factors for the uplink channel. The first and second sets of correction factors may be determined using a matrix-ratio computation or a minimum mean square error computation. The calibration may be performed in real-time based on over-the-air transmission. Other aspects, embodiments, and features are also claimed and described.
    Type: Grant
    Filed: March 13, 2012
    Date of Patent: June 10, 2014
    Assignee: QUALCOMM Incorporated
    Inventors: Mark S. Wallace, John W. Ketchum, Jay Rodney Walton, Steven J. Howard
  • Patent number: 8744506
    Abstract: A method of wireless communication includes receiving a first signal on a first channel, determining a second channel based on the first signal, receiving a second signal on the second channel, and communicating with a wireless device on the second channel based on a quality of the second signal.
    Type: Grant
    Filed: June 17, 2010
    Date of Patent: June 3, 2014
    Assignee: QUALCOMM Incorporated
    Inventors: Ahmed K. Sadek, Avinash Jain
  • Patent number: 8744494
    Abstract: A method is disclosed for establishing communication links in a satellite based wireless communication system. The method includes: establishing a forward link from the satellite to at least one of a plurality of subscriber wireless communication devices (WCDs) by use of a shared frequency multi-user communication protocol; applying an error correction code to use in the forward link, whereby the error correction applies to an aggregation of communications provided to multiple ones of the WCDs; and receiving communications in a return link signal by use of a protocol providing channels having dedicated frequency assignments and non-slotted channel assignment.
    Type: Grant
    Filed: June 4, 2007
    Date of Patent: June 3, 2014
    Assignee: Qualcomm Incorporated
    Inventor: Ahmad Jalali
  • Patent number: 8737366
    Abstract: A method for transmission of data requires a transmitting node sending a request message identifying at least one time slot that is available for the transmitting node to transmit a data transmission to a plurality of receiving nodes, a first receiving node transmitting a first time slot grant message in response to the request message, a second receiving node transmitting a second time slot grant message in response to the request message, the transmitting node receiving the first and second time slot grant messages, the transmitting node evaluating the first and second time slot grant messages to determine at least one available time slot for transmitting, the transmitting node transmitting at least one confirmation message to the first and second receiving nodes, and the transmitting node transmitting the data transmission in the at least one available time slot identified in the at least one confirmation message.
    Type: Grant
    Filed: January 31, 2012
    Date of Patent: May 27, 2014
    Assignee: Siemens Enterprise Communications GmbH & Co. KG
    Inventors: Matthias Hollick, Parag Sudhir Mogre, Christian Schwingenschlogl, Andreas Ziller
  • Patent number: 8730855
    Abstract: A method for detecting a channel in a mixed-mode communications system is presented. The channel contains a primary synchronization pattern in a predetermined location within the channel. The primary synchronization pattern is compared against different predetermined channel synchronization patterns to detect a channel. Upon detection of the channel, a look-back channel detector confirms the existence of the channel by using the location of the primary synchronization pattern. Detection and confirmation of the channel may be employed simultaneously to each channel of a multiple-channel direct mode of operation signal. Audio holes may be eliminated in a 2:1 TDMA direct mode operation where both time slots contain signals from two different originating communication devices and the signals have different priority.
    Type: Grant
    Filed: December 22, 2010
    Date of Patent: May 20, 2014
    Assignee: Motorola Solutions, Inc.
    Inventors: Hun Weng Khoo, Yueh Ching Chung, David G. Wiatrowski
  • Patent number: 8732325
    Abstract: A device for transmitting data to a further device is arranged for transmitting a first class of data as a guaranteed stream of data-units, and for transmitting a second class of data-units on a best effort basis. The device starts the transmission of a burst of data-units which belong to the second class at a point in time where the remaining time interval until the start of the next burst of first-class data minus the required time for transmitting the burst of second-class of data is less than a predetermined time.
    Type: Grant
    Filed: May 3, 2006
    Date of Patent: May 20, 2014
    Assignee: ST-Ericsson SA
    Inventor: Ewa Hekstra-Nowacka
  • Patent number: 8724542
    Abstract: A transmission of information within a wireless cellular network may include a first and second group of samples. A first group of samples is created comprising at least a first and a last subgroup, wherein the last subgroup is same as the first subgroup. A second group of samples created. A transformed set of samples produced by jointly transforming the created first and second group with a discrete Fourier transform (DFT). The transformed set of samples is expanded to produce an expanded set, and the expanded set is transformed with an inverse discrete Fourier transform (IDFT) to produce an OFDM symbol with a fractional payload. The first group of samples is a reference signal (RS), which is known to the receiver before the transmission occurs, while the second group of samples is information data.
    Type: Grant
    Filed: August 18, 2010
    Date of Patent: May 13, 2014
    Assignee: Texas Instruments Incorporated
    Inventors: Tarik Muharemovic, Zukang Shen, Jing Jiang
  • Patent number: 8724464
    Abstract: Aspects of a method and system for near continuous data rate limit adjustment via a plurality of link variables in an energy efficient network. In this regard, power consumption of a network device may be controlled by enabling and/or disabling one or more components in the network device based on an adjustment of a plurality of data rate variables that control a data rate limit at which the network device may communicate. Exemplary data rate variables may comprise a number of active channels of a network link over which the network device communicates, a symbol rate on an Ethernet link over which said network device communicates, an inter-frame gap time on an Ethernet link over which said network device communicates, a signal constellation utilized for representing signals on an Ethernet link over which said network device communicates.
    Type: Grant
    Filed: October 1, 2008
    Date of Patent: May 13, 2014
    Assignee: Broadcom Corporation
    Inventor: Wael William Diab
  • Patent number: 8717963
    Abstract: A wireless star topology communication network is implemented in which a centrally located access point supports a very large number of fixed location nodes distributed over a large metropolitan area. Communication is by direct sequence spread spectrum modulating m-ary quadrature amplitude modulation symbols. The access point and all nodes are synchronized using GPS or other means to prevent data collisions. Multiple access is primarily based on signal propagation time between the access point and a node which allows nodes at different ranges to use the same direct sequence code.
    Type: Grant
    Filed: January 27, 2013
    Date of Patent: May 6, 2014
    Inventor: Gregory Hubert Piesinger
  • Patent number: 8718569
    Abstract: A method of provisioning a communications link between remote terminals within a hub-spoke network comprising receiving, by a first remote terminal, information about a second remote terminal from a hub, selecting, by the first remote terminal, a modulation factor, coding rate, symbol rate, center frequency, and power level based on the information received about the second remote terminal, transmitting, by the first remote terminal, a signal using at least one of the selected modulation factor, coding rate, symbol rate, center frequency, and power level, to the second remote terminal such that a communications link is created, and adjusting the modulation factor, coding rate, symbol rate, center frequency, or power level of the transmitted signal such that performance of the link is increased while maintaining a presence of the link.
    Type: Grant
    Filed: February 29, 2012
    Date of Patent: May 6, 2014
    Assignee: Comtech EF Data Corp.
    Inventors: Vasile Manea, Michael Beeler, Frederick Morris, Jeffery Harig
  • Patent number: RE45236
    Abstract: A system and method are described for binding together a plurality of wireless data communications channels, whereby an aggregate throughput improvement is realized. A master channel amongst the channels to be bound is compatible with existing standards-based wireless data communications equipment. The master channel serves to perform MAC association and flow control. Aggregate throughput is improved by sending and receiving either multiple sets of separately encoded packets, commonly encoded packets or redundantly encoded packets.
    Type: Grant
    Filed: September 13, 2011
    Date of Patent: November 11, 2014
    Assignee: QUALCOMM Incorporated
    Inventors: Paul J. Husted, William J. McFarland, Jeffrey M. Gilbert