Patents Issued in April 13, 2017
  • Publication number: 20170104516
    Abstract: Some demonstrative embodiments include devices, systems and/or methods of beamformed communication with space block coding. For example, an apparatus may include a controller to control a plurality of antenna subarrays to form a plurality of directional beams directed in a plurality of different directions for communicating a multi-input-multi-output (MIMO) wireless transmission, which is encoded according to a space-block coding scheme.
    Type: Application
    Filed: September 22, 2016
    Publication date: April 13, 2017
    Inventors: Alexander Alexandrovich Maltsev, Andrey Pudeyev, Alexei Vladimirovich Davydov, Ali S. Sadri, Carlos Cordeiro
  • Publication number: 20170104517
    Abstract: A beam selection method in a mobile communication system including a base station with multiple antennas and user equipment conducting radio communication with the base station includes the steps of, at the base station, detecting a direction in which the user equipment is located, transmitting precoded reference signals toward the detected direction by spatial multiplexing using same frequency and time resources, and determining a beam for the user equipment based upon feedback information from the user equipment.
    Type: Application
    Filed: November 27, 2014
    Publication date: April 13, 2017
    Applicant: NTT DOCOMO, INC.
    Inventors: Yuichi Kakishima, Satoshi Nagata, Yoshihisa Kishiyama, Chongning Na
  • Publication number: 20170104518
    Abstract: Disclosed is a precoding method for generating, from a plurality of baseband signals, a plurality of precoded signals that are transmitted in the same frequency bandwidth at the same time. According to the precoding method, one matrix is selected from among matrices defining a precoding process that is performed on the plurality of baseband signals by hopping between the matrices. A first baseband signal and a second baseband signal relating to a first coded block and a second coded block generated by using a predetermined error correction block coding scheme satisfy a given condition.
    Type: Application
    Filed: December 23, 2016
    Publication date: April 13, 2017
    Inventors: Yutaka MURAKAMI, Tomohiro KIMURA, Mikihiro OUCHI
  • Publication number: 20170104519
    Abstract: A method for receiving data by a relay station (RS) in a wireless communication system includes: receiving radio resource allocation information via an R-PDCCH (R-Physical Downlink Control Channel); and receiving data from a base station (BS) via an R-PDSCH (R-Physical Downlink Shared Channel) indicated by the radio resource allocation information, wherein the radio resource allocation information includes information regarding an allocation of resource blocks in a frequency domain and information regarding an allocation of OFDM symbols in a time domain. Since the radio resource allocation information providing information regarding a time relationship between a control channel transmitted by the BS to a UE and a control channel transmitted by the RS to a UE connected to the RS is provided, the RS can reliably receive a signal transmitted from the BS in a backhaul link between the BS and the RS in a wireless communication system including the RS.
    Type: Application
    Filed: December 20, 2016
    Publication date: April 13, 2017
    Applicant: LG ELECTRONICS INC.
    Inventors: Kyu Jin PARK, Jae Hoon CHUNG, Han Gyu CHO, Yeong Hyeon KWON, Sung Ho MOON
  • Publication number: 20170104520
    Abstract: The present invention provides a method for reducing interference to transmissions, occurring due to other transmissions sent from/to neighboring satellites using same frequencies and/or interference that occur due to other communications transmitted along different satellite's beams using the same frequencies, wherein the method comprises the step of replacing full dummy frames that should be transmitted in a TDM continuous satellite forward channel, by dummy frames' headers with or without a pilot sequence. Also, the dummy frames' headers and the pilot sequence if available, may be transmitted at a reduced power.
    Type: Application
    Filed: May 13, 2015
    Publication date: April 13, 2017
    Inventor: Doron RAINISH
  • Publication number: 20170104521
    Abstract: A method for establishing radiofrequency links via a satellite having several spots between a gateway and a service area comprising a plurality of elementary covering zones, designated cells, each cell being associated to a spot and including a plurality of terrestrial terminals, a forward link between the gateway towards the plurality of terrestrial terminals including a first step in which the gateway emits a first analog radiofrequency signal towards the satellite, with a first spectral efficiency; a second step in which a payload of the satellite receives the first analog radiofrequency signal; a third step in which the payload processes the first analog radiofrequency signal, and a fourth step in which the payload emits a plurality of second analog radiofrequency signals towards the cells with a second spectral efficiency, the first spectral efficiency being greater than the second spectral efficiency.
    Type: Application
    Filed: October 12, 2016
    Publication date: April 13, 2017
    Inventor: Alessandro LE PERA
  • Publication number: 20170104522
    Abstract: A TDR for locating impairments in an HFC network is claimed. The network carries burst signals in an upstream band during burst intervals. The TDR comprises a transmitter, receiver, level detector, controller, accumulator, and probe detector. The transmitter transmits probe signals to the impairment, causing a reflection of the probe signals. Each probe signal is in the upstream band and has a bandwidth extending the width of the upstream band. The receiver receives the reflected probe signals during receiving intervals, and receives the burst signals during receiving intervals that overlap burst intervals. The level detector measures a level of the signals received during each receiving interval. The controller determines which of the receiving intervals are free of burst signals, based on the level measurement. The accumulator accumulates reflected probe signals received during intervals free of burst signals.
    Type: Application
    Filed: October 3, 2016
    Publication date: April 13, 2017
    Inventor: Victor M. Zinevich
  • Publication number: 20170104523
    Abstract: One or more embodiments are directed to apparatuses and methods of evaluating an endface of an optical communication link, such as a fiber optic cable. In at least one embodiment, a camera probe includes an imaging device that includes one or more feedback mechanisms, such as an alignment feedback mechanism that communicates alignment information regarding an alignment of the optical communication link under test with an image sensor of the camera probe. The alignment feedback mechanism may be visual and/or aural. The alignment feedback mechanism may provide directional information to the user indicative of a direction to move the imaging device relative to the optical communication link. In addition or alternatively, the feedback mechanism may include a focus feedback mechanism that communicates focus information regarding a focus of the endface in an obtained image of the endface.
    Type: Application
    Filed: October 13, 2015
    Publication date: April 13, 2017
    Inventors: J. David Schell, Christian Schillab
  • Publication number: 20170104524
    Abstract: A central node connected to a remote network node via a fiber optic link controls an antenna switch in the remote network node by controlling the DC bias current of the laser providing an optical transmission signal from the central network node to the remote network node via the fiber optic link. The remote network node converts the received optical transmission signal to an electrical transmission signal, and detects the DC level of the electrical transmission signal. If the detected DC level satisfies a predetermined condition, the remote network node connects the antenna port of the antenna switch, and thus the antenna, to a reception signal path of the remote network node. Otherwise, the remote network node connects the antenna port of the antenna switch, and thus the antenna, to a transmission signal path of the remote network node.
    Type: Application
    Filed: October 13, 2015
    Publication date: April 13, 2017
    Inventors: Henrik Sjöland, Waqas Ahmad
  • Publication number: 20170104525
    Abstract: Systems and methods providing resiliency between a server layer and a client layer include determining a minimal spanning tree in the client layer; determining a Steiner tree in the server layer based on vertices associated with the minimal spanning tree in the client layer; and determining one or more resiliency paths in the client layer based on the minimal spanning tree and the Steiner tree, wherein the one or more resiliency paths are added to the minimal spanning tree in the client layer based on potential failures in the Steiner tree. For example, the server layer is an optical layer and the client layer is a Time Division Multiplexing (TDM) layer.
    Type: Application
    Filed: November 19, 2015
    Publication date: April 13, 2017
    Inventors: Anurag PRAKASH, Alexander G. YOUNG, Mohit CHHILLAR
  • Publication number: 20170104526
    Abstract: A stressed optical transmitter for compliance testing an optical receiver includes an electrical signal generator generating a test electrical signal and an optical distortion module including an EOC converting the test electrical signal to an optical signal. The optical signal distortion module selectively distorts the optical signal to generate a stressed optical test signal. The optical distortion module emits the stressed optical test signal for compliance testing the optical receiver. A method of compliance testing an optical receiver includes generating a test electrical signal using a test pattern generator, receiving the test electrical signal at an optical distortion module, converting the test electrical signal to an optical signal, selectively distorting the optical signal to generate a stressed optical test signal, emitting the stressed optical test signal, and receiving the stressed optical test signal at an optical receiver for compliance testing the optical receiver.
    Type: Application
    Filed: November 10, 2015
    Publication date: April 13, 2017
    Inventor: Jonathan Lee
  • Publication number: 20170104527
    Abstract: A test instrument for testing RF and RFOG installations is disclosed. The test instrument is configured to test RFoG downstream power and recover an original RF signal from an optical signal generated at a head end and perform DOCSIS and RF signal tests including level, scan, carrier to noise, digital MER/BER, and full communication with CMTS.
    Type: Application
    Filed: October 11, 2016
    Publication date: April 13, 2017
    Inventor: Gary W. Sinde
  • Publication number: 20170104528
    Abstract: A method and system for high-precision two-way fiber-optic time transfer comprising pre-adjusting, including calculating a local timing signal adjustment amount for a first fiber-optic time synchronization unit and a second fiber-optic time synchronization unit, and the corresponding adjusting. and following steps including the two fiber-optic time synchronization units conducting two-way time transfer based on a time division multiplexing transmission over an optical fiber link. The present invention realizes high-precision fiber-optic time transfer by combining two-way time transfer and bidirectional time division multiplexing technique.
    Type: Application
    Filed: December 22, 2016
    Publication date: April 13, 2017
    Inventors: GUILING WU, LIANG HU, HAO ZHANG, JIANPING CHEN
  • Publication number: 20170104529
    Abstract: Embodiments of the present disclosure provide a monitoring apparatus for an optical signal to noise ratio, a signal transmission apparatus and a receiver. White noise power of received signals is calculated according to noise power and power of pilot signals of the received signals in different polarization states, and influence of a nonlinear noise is excluded, thereby accurately estimating an optical signal to noise ratio, for example, with a calculation process being simple and an application range being relatively wide.
    Type: Application
    Filed: October 12, 2016
    Publication date: April 13, 2017
    Applicant: FUJITSU LIMITED
    Inventors: Liang DOU, Zhenning TAO
  • Publication number: 20170104530
    Abstract: There is provided a transmission apparatus, which includes: a filter configured to pass an optical signal having a predetermined wavelength received via an optical fiber, a variable optical attenuator configured to attenuate a power level of the optical signal passed by the filter, a first measuring circuit configured to measure a first power of the optical signal before being passed by the filter, a second measuring circuit configured to measure a second power of the optical signal attenuated by the variable optical attenuator, a detector configured to detect a difference between the first power and the second power, and a controller configured to increase an attenuation factor of the variable optical attenuator when the difference is equal to or larger than a first predetermined value.
    Type: Application
    Filed: September 23, 2016
    Publication date: April 13, 2017
    Applicant: FUJITSU LIMITED
    Inventors: Hiroki Nagata, Masanori Eiro, Daisuke Kobayashi, Tatsuo Nagayoshi
  • Publication number: 20170104531
    Abstract: Techniques are disclosed for position-based actions using light-based communication (LCom). LCom signals can be used to encode or otherwise provide data which in turn can be used to help determine the position of a device receiving those LCom signals. Therefore, LCom can be used to facilitate various actions based on, for example, the position of an LCom receiver determined using data received via the LCom signals. There are numerous use cases for position-based actions using LCom, such as security applications, check-in applications, payments based on location, permissions, and access to information that can all be tied to a location. Actions may include temporarily disabling or enabling the LCom receiver hardware or software (such as disabling device cameras in high security areas), providing another security layer as a result of knowing the device position, and using the LCom receiver position as a part of a larger process.
    Type: Application
    Filed: March 25, 2015
    Publication date: April 13, 2017
    Applicant: OSRAM SYLVANIA Inc.
    Inventors: Anant Aggarwal, Christian Breuer, Barry Stout
  • Publication number: 20170104532
    Abstract: Techniques are disclosed for projecting visible cues to assist with light-based communication (LCom), the visible cues referred to herein as visual hotspots. The visual hotspots can be projected, for example, using a luminaire that may be LCom-enabled. The visual hotspots may be projected onto the floor of an area including an LCom system. The visual hotspots can be used for numerous benefits, including alerting a potential user that LCom is available, educating the user about LCom technology, and assisting the user in using the LCom signals available in the area. The visual hotspots may include images, symbols, cues, characters (e.g., letters, words, numbers, etc.), indicators, logos, or any other suitable content. In some cases, the visual hotspots may be interactive, such that a user can scan the hotspot to cause an action to occur (e.g., launch an application or website).
    Type: Application
    Filed: March 25, 2015
    Publication date: April 13, 2017
    Applicant: OSRAM SYLVANIA Inc.
    Inventors: Barry Stout, Christian Breuer, Anant Aggarwal, Bernhard Siessegger
  • Publication number: 20170104533
    Abstract: An apparatus is provided that includes a display, an image sensor having a plurality of exposure lines, a processor, and a memory storing a computer program, which when executed by the processor, causes the processor to perform operations. The operations include displaying a first assist image on the display, and executing a visible light communication mode. In the visible light communication mode, the operations include (i) setting a second exposure time of the image sensor so that, in an image obtained by capturing a subject by the image sensor, a plurality of bright lines corresponding to the plurality of exposure lines included in the image sensor appear according to a change in luminance of the subject, (ii) obtaining a bright line image including the plurality of bright lines, and (iii) obtaining information by demodulating data specified by a pattern of the plurality of bright lines.
    Type: Application
    Filed: December 21, 2016
    Publication date: April 13, 2017
    Applicant: PANASONIC INTELLECTUAL PROPERTY CORPORATION OF AMERICA
    Inventors: Mitsuaki OSHIMA, Koji NAKANISHI, Hideki AOYAMA, Ikuo FUCHIGAMI, Tsutomu MUKAI, Hidehiko SHIN, Yosuke MATSUSHITA, Shigehiro IIDA, Kazunori YAMADA, Toshiyuki MAEDA, Akihiro UEKI, Takashi SUZUKI, Akira SHIOKAWA, Koji AOTO
  • Publication number: 20170104534
    Abstract: A remote device configured to wirelessly communicate with a computing device without using RF signaling. Embodiments of the remote device may include a processor; a memory coupled to the processor and configured to store data; one or more transistor(s); and one or more output pad(s) operatively coupled with the one or more transistor(s). The processor is configured to cause the one or more transistor(s) to selectively ground one or more of the output pad(s). The one or more output pad(s) are configured to be selectively grounded to impose a capacitive load pattern on the capacitive sensor of a computing device, the capacitive load pattern encoding the data. The pattern is detectable and decodable by the computing device to recover the data. Embodiments of the remote device may include a photodetector to detect light pulses from the display of a computing device, the light pulses representing data from the computing device.
    Type: Application
    Filed: October 12, 2016
    Publication date: April 13, 2017
    Applicant: Performance Designed Products LLC
    Inventor: Storm Orion
  • Publication number: 20170104535
    Abstract: An optical remodulator includes: a polarization diversity modulator configured to modulate an input optical signal to generate an output optical signal by using a first optical modulator implemented for a first polarization state and a second optical modulator implemented for a second polarization state that is orthogonal to the first polarization state; a photo detector configured to optical-to-electrical convert the input optical signal or the output optical signal or both of the optical signals into an electric signal; and a drive signal generator configured to generate a first drive signal that drives the first optical modulator and a second drive signal that drives the second optical modulator based on the electric signal generated by the photo detector.
    Type: Application
    Filed: August 30, 2016
    Publication date: April 13, 2017
    Applicant: FUJITSU LIMITED
    Inventor: Takeshi Hoshida
  • Publication number: 20170104536
    Abstract: An optical source (10) comprising: a first laser (12) arranged to generate a first optical signal (14) having a first state of polarisation and a first optical frequency; a second laser (16) arranged to generate a second optical signal (18, 48, 78) having a second state of polarisation, substantially orthogonal to the first state of polarisation, and having a second optical frequency, different to the first optical frequency by a preselected frequency difference, Av; a polarisation beam coupler (20) arranged to combine the first optical signal and the second optical signal into a composite optical signal comprising both the first optical signal and the second optical signal having said substantially orthogonal states of polarisation; and an output (22) arranged to output the composite optical signal (24).
    Type: Application
    Filed: March 27, 2014
    Publication date: April 13, 2017
    Inventors: Francesco Testa, Antonio D'Errico, Ernesto Ciaramella, Luca Giorgi, Wei-Ping Huang, Marco Presi
  • Publication number: 20170104537
    Abstract: A transimpedance amplifier includes a first and a second power supply terminal for receiving a positive constant supply voltage, wherein the second power supply terminal represents a ground, and an input terminal adapted to be connected to a current source. The transimpedance amplifier further comprises a transistor comprising a control terminal and two further terminals, wherein the input terminal is connected to the control terminal of the first transistor. An inductor is connected between the first of the two further terminals of the transistor and the first power supply terminal, and a bias network is connected between the second of the two further terminals of the transistor and ground. Specifically, the transimpedance amplifier is configured such that the resistance between said first of said two further terminals of said first transistor and said first power supply terminal is small enough, such that said transimpedance amplifier operates as a differentiator.
    Type: Application
    Filed: April 28, 2016
    Publication date: April 13, 2017
    Inventors: Francesco Radice, Melchiorre Bruccoleri, Maurizio Zuffada
  • Publication number: 20170104538
    Abstract: A system for data transport in a Distributed Antenna System (DAS) includes a plurality of remote Digital Access Units (DAUs) located at a Remote location. The plurality of remote DAUs are coupled to each other and operable to transport digital signals between the plurality of remote DAUs. The system also includes a plurality of central hubs. Each of the plurality of central hubs is in communication with one of the remote DAUs using an electrical communications path. The system further includes a plurality of transmit/receive cells. Each of the plurality of transmit/receive cells includes a plurality of remote hubs. Each of the remote hubs in one of the plurality of transmit/receive cells is in communication with one of the plurality of central hubs using an optical communications path.
    Type: Application
    Filed: December 19, 2016
    Publication date: April 13, 2017
    Applicant: Dali Systems Co. Ltd.
    Inventors: Shawn Patrick Stapleton, Sasa Trajkovic
  • Publication number: 20170104539
    Abstract: The disclosures provide a method and apparatus for transmitting and receiving interface signals of a distributed base station. At least one channel of Common Public Radio Interface (CPRI) signals of a distributed base station are encapsulated into optical transport unitx (OTUx) signals in a frame structure of OTUx by adopting Generic Mapping Procedure (GMP) mapping scheme, wherein the x represents a transmission capacity and wherein the OTUx is adopted for providing a bandwidth required by the at least one channel of CPRI signals, and then the OTUx signals that bear the at least one channel of CPRI signals are sent.
    Type: Application
    Filed: December 21, 2016
    Publication date: April 13, 2017
    Inventors: Jingxin TAN, Xin XIAO, Zhiyong HUANG, Chaoyang LI, Binghua ZHANG, Wei DU, Hanguo LI
  • Publication number: 20170104540
    Abstract: A transistor device includes a transistor implemented over a semiconductor substrate, one or more dielectric layers formed over the transistor, and a handle wafer layer disposed on at least a portion of the one or more dielectric layers, the handle wafer layer including a topside trench defined at least in part by sidewall portions of the handle wafer layer.
    Type: Application
    Filed: December 21, 2016
    Publication date: April 13, 2017
    Inventors: Jerod F. MASON, Dylan Charles BARTLE, David Scott WHITEFIELD
  • Publication number: 20170104541
    Abstract: An optical transceiver comprising an optical signal input, a first modulation section coupled to the optical signal input, a second modulation segment coupled to the optical signal input and positioned in serial with the first modulation section, wherein the first modulation section comprises a first digital electrical signal input, a first digital driver coupled to the first digital electrical signal input, and a first modulator coupled to the first digital driver, and wherein the second modulation section comprises a second digital electrical signal input, a second digital driver coupled to the second digital electrical signal input, and a second modulator coupled to the second digital driver, and an optical signal output coupled to the first modulation section and the second modulation section.
    Type: Application
    Filed: December 22, 2016
    Publication date: April 13, 2017
    Inventors: Xueyan Zheng, Dawei Zheng, Xiao Shen, Morgan Chen, Hongbing Lei
  • Publication number: 20170104542
    Abstract: An optical module includes a substrate, a package, and a flexible substrate. The substrate is provided with an electrode. The package includes a housing fixed to the substrate, a receiving unit that optically demodulates a received optical signal to convert the optical signal into a reception electrical signal, an output terminal that is provided on a surface of the housing and outputs the reception electrical signal, an input terminal that is provided at a height from the substrate different from a height of the output terminal and receives a transmission electrical signal, and a transmitting unit that optically modulates the transmission electrical signal received from the input terminal and transmits an optical signal resulting from optical modulation. A flexible substrate has flexibility and includes a signal electrode that connects one of the output terminal and the input terminal to the electrode arranged on the substrate.
    Type: Application
    Filed: August 31, 2016
    Publication date: April 13, 2017
    Applicant: Fujitsu Optical Components Limited
    Inventor: Masaki SUGIYAMA
  • Publication number: 20170104543
    Abstract: Systems and methods for optical communication using single source optical transmission are disclosed. A representative method includes receiving optical signals at a first frequency by a receiver (RX) from an optical fiber. The received optical signals are routed to a modulator that modulates the optical signals at a second frequency. The optical signals are emitted by a transmitter (TX) back to the optical fiber at the second frequency.
    Type: Application
    Filed: October 11, 2016
    Publication date: April 13, 2017
    Inventors: Jason Taylor, Narsing Vijayrao
  • Publication number: 20170104544
    Abstract: An optical transceiver using a modulator biased to a non-linear region of the modulator's power transfer function can extend the possible transmission distance of intensity modulated direct detection (IMDD) n-level pulse amplitude modulated (PAM-n) signals. A non-linear look-up-table may compensate for non-linear characteristics of the modulator. An adaptive decision threshold look-up-table may be used to provide adaptive decision levels at the receiver.
    Type: Application
    Filed: March 3, 2016
    Publication date: April 13, 2017
    Inventors: Sung CHUNG, Xuefeng Tang, Chuandong Li, Zhuhong Zhang
  • Publication number: 20170104545
    Abstract: An apparatus includes a photodiode configured to detect an optical signal; a common-base amplifier configured to input a current signal converted from the optical signal by the photodiode; an common-emitter amplifier configured to couple to an output of the common-base amplifier; a first circuit configured to feed back the output of the common-emitter amplifier to an output of the common-base amplifier; and a second circuit configured to, when power of the optical signal exceeds a predetermined level, reduce a load resistance value of the common-base amplifier and increase an emitter current of the common-emitter amplifier.
    Type: Application
    Filed: September 22, 2016
    Publication date: April 13, 2017
    Applicant: FUJITSU LIMITED
    Inventor: Takashi SHIRAISHI
  • Publication number: 20170104546
    Abstract: In accordance with an example embodiment of the present invention, there is provided an apparatus comprising a dual-rail encoder (120) configured to receive light from a light source and to output dual-rail encoded light, a combiner (130) configured to convert the dual-rail encoded light into polarization encoded light, and at least one processing core configured to obtain compensation adjustment information concerning a fibre (145) and to control the dual-rail encoder (120) based at least in part on the compensation adjustment information.
    Type: Application
    Filed: June 9, 2014
    Publication date: April 13, 2017
    Inventors: David BITAULD, Joachim WABNIG, Antti NISKANEN, Hongwei LI
  • Publication number: 20170104547
    Abstract: One example discloses an electromagnetic device, including: a first circuit, configured to generate a first electromagnetic field; a second circuit responsive to the first electromagnetic field; a damping circuit configured to generate a second electromagnetic field in response to a current induced by the first electromagnetic field; and wherein the second electromagnetic field reduces the second circuit's responsiveness to the first electromagnetic field.
    Type: Application
    Filed: October 12, 2015
    Publication date: April 13, 2017
    Inventor: Anthony Kerselaers
  • Publication number: 20170104548
    Abstract: Transmit/receive switches and methods for radio control include connecting a first reactive impedance in parallel with a power amplifier on a transmit path during reception to neutralize a reactive impedance of the power amplifier and to prevent received signals from entering the transmit path. The first reactive impedance is disconnected during transmission.
    Type: Application
    Filed: June 3, 2016
    Publication date: April 13, 2017
    Inventors: Alberto Valdes Garcia, Scott K. Reynolds, Bodhisatwa Sadhu, Yahya Mesgarpour Tousi
  • Publication number: 20170104549
    Abstract: A device may determine a first signal quality value associated with a wireless signal received by a first antenna of the device, may determine a second signal quality value associated with a wireless signal received by a second antenna of the device, and may determine a combined signal quality value based on the first signal quality value and the second signal quality value. The device may apply an offset value to the first signal quality value to form a modified signal quality value, may compare the combined signal quality value and the modified signal quality value, and may selectively report the modified signal quality value or the combined signal quality value based on comparing the combined signal quality value and the modified signal quality value.
    Type: Application
    Filed: October 8, 2015
    Publication date: April 13, 2017
    Inventors: Xin WANG, Lily ZHU, Andrew E. YOUTZ, Paul VENIZELOS
  • Publication number: 20170104550
    Abstract: A system and method for media rebroadcasting for synchronized rendering across multiple devices, comprising a first media rendering device configured to receive media content from a media source and rebroadcast at least a portion of the media content to each of a plurality of second media rendering devices using the network interface, wherein each of the second media rendering devices renders its received media content synchronously with the rendering of the first media rendering device.
    Type: Application
    Filed: December 15, 2016
    Publication date: April 13, 2017
    Inventors: Ravi Rajapakse, Ian McIntosh
  • Publication number: 20170104551
    Abstract: A technique is provided for provisioning optical connections in an optical network.
    Type: Application
    Filed: March 31, 2015
    Publication date: April 13, 2017
    Applicant: Alcatel Lucent
    Inventors: Gabriel CHARLET, Annalisa MOREA
  • Publication number: 20170104552
    Abstract: A method of determining a near optimal forward error correction scheme for the transmission of audio data over a lossy packet switched network having preallocated estimated bandwidth, delay and packet losses, between at least a first and second communications devices, the method including the steps of: determining a first coding rate for the audio data; determining a peak redundancy coding rate for redundant versions of the audio data; determining an average redundancy coding rate over a period of time for redundant versions of the audio data; determining an objective function which maximizes a bitrate-perceptual audio quality mapping of the transmitted audio data including a playout function formulation; and optimising the objective function to produce a forward error correction scheme providing a high bitrate perceptual audio quality.
    Type: Application
    Filed: October 7, 2016
    Publication date: April 13, 2017
    Applicant: Dolby Laboratories Licensing Corporation
    Inventors: Xuejing Sun, Dong Shi
  • Publication number: 20170104553
    Abstract: A new lower density parity check (LDPC) tone mapper is proposed when DCM is applied for a given resource unit (RU) when LDPC is used as the channel control coding. For HE PPDU transmission with DCM, LDPC encoded streams are first modulated by a DCM constellation mapper. The modulated symbols of the lower half of the frequency segment and the modulated symbols of the upper half of the frequency segment are modulated using the same LDPC encoded bits using DCM mapping. The modulated symbols of the lower half of the frequency segment are mapped to lower half of the data subcarriers using DCM LDPC tone mapper. The modulated symbols of the upper half of the frequency segment are mapped to upper half of the data subcarriers using the same DCM LDPC tone mapper. Maximum frequency diversity for DCM can be achieved.
    Type: Application
    Filed: October 11, 2016
    Publication date: April 13, 2017
    Inventors: Jianhan Liu, Shengquan Hu, Tianyu Wu, Thomas Edward PARE, JR.
  • Publication number: 20170104554
    Abstract: Techniques to perform forward error correction for an electrical backplane are described.
    Type: Application
    Filed: November 23, 2016
    Publication date: April 13, 2017
    Applicant: Intel Corporation
    Inventors: Ilango S. Ganga, Luke Chang, Andrey Belogolovy, Andrei Ovchinnikov
  • Publication number: 20170104555
    Abstract: A computer-implemented method includes sending one or more network packets. Each of the one or more network packets includes a network packet header. The computer implemented method further includes receiving a negative acknowledgement list comprising the network packets not received. The computer-implemented method further includes, responsive to the receiving of a negative acknowledgment list: For each network packet of the negative acknowledgment list, transforming the network packet header into a modified packet header to yield a modified packet. The computer-implemented method further includes combining each modified packet into a modified packet list. The computer-implemented method further includes generating one or more repair packets. Each of the one or more repair packets further include a repair packet header and a portion of the modified packet list. The computer-implemented method further includes sending the one or more repair packets.
    Type: Application
    Filed: October 12, 2015
    Publication date: April 13, 2017
    Inventors: Venkata Kiran Kumar Darbha, Savitha Joshi, Nir Naaman, Lohitashwa Thyagaraj
  • Publication number: 20170104556
    Abstract: A source node may send a first data unit to a destination node. To send the first data unit, the source node may transmit a modulation pattern over a transmission medium. In some cases, particular data units may correspond to modulation patterns with features that cause errors in transmission. The source node may receive an indication of an error from the destination node. To avoid repeated errors the retransmission, coding circuitry at the source node may alter data within the first data unit to generate a retransmission data unit. The alteration may result in the retransmission data unit corresponding to a modulation pattern different from that of the first data unit. The new modulation pattern may lack the error causing features and reduce the chance of repeated errors.
    Type: Application
    Filed: October 4, 2016
    Publication date: April 13, 2017
    Inventor: Michael Eugene Locke
  • Publication number: 20170104557
    Abstract: [Problem] To avoid the occurrence of a “DTX-ACK” error or “DTX-NACK” error when a terminal has failed to receive uplink control information. [Solution] A base station (20) of a wireless communication system wherein packet retransmission control is performed by means of a hybrid automatic repeat request (HARQ) is equipped with: a physical uplink shared channel (PUSCH) reception processing unit (104) that, when the transmission timing of HARQ information from a terminal (10) coincides with the transmission timing of a PUSCH transmitted from the terminal (10), receives the HARQ information from the PUSCH and performs a cyclic redundancy check (CRC) on a packet included in the PUSCH; and an HARQ information check unit (105) that performs HARQ-based confirmation of reception at the terminal (10) by receiving the HARQ information checked by the PUSCH reception processing unit (104) and the CRC result.
    Type: Application
    Filed: June 1, 2015
    Publication date: April 13, 2017
    Applicant: NEC Corporation
    Inventor: Yuki KOGURE
  • Publication number: 20170104558
    Abstract: A user equipment (UE), including: a receiver configured to receive downlink data transmitted by a base station via downlink component carriers including a secondary component carrier; and a circuit configured to select uplink resources from available resources for transmitting response signals obtained by decoding the received downlink data and select corresponding modulation symbols by using a mapping relation between a state of the response signals and the selected resources and the modulation symbols according to the state of the response signals; wherein the available resources include resources corresponding to a primary component carrier and resources allocated to the secondary component carrier by the base station; and, wherein the mapping relation includes cases in which the resource corresponding to the response signal that is NACK/DTX is not selected; where NACK represents Negative Acknowledgement, and DTX represents Discontinuous Transmission; and when the response signals are all DTX, no resource
    Type: Application
    Filed: December 21, 2016
    Publication date: April 13, 2017
    Applicant: FUJITSU LIMITED
    Inventors: Yuantao ZHANG, Yi ZHANG, Yuanrong LAN, Hua ZHOU, Jianming WU
  • Publication number: 20170104559
    Abstract: Systems and methodologies are described that facilitate identifying resources upon which an acknowledgment can be sent or received in a wireless communication environment that leverages coordinated multi-point (CoMP). The resources can be identified based upon a criterion that can be identifiable to a non-anchor cell base station (as well as an anchor cell base station, a mobile device, etc.). The criterion can be an identifier corresponding to a mobile device, where the identifier maps to a predetermined set of resources. Examples of the identifier can include a media access control identifier (MACID), a cell radio network temporary identifier (C-RNTI), a short C-RNTI, etc. Further, the criterion can be physical resources corresponding to a transmission, where the acknowledgment is responsive to the transmission. Moreover, the acknowledgment can be sent or received in connection with a cooperation technique (e.g.
    Type: Application
    Filed: December 22, 2016
    Publication date: April 13, 2017
    Applicant: QUALCOMM Incorporated
    Inventors: Ravi Palanki, Alexei Gorokhov
  • Publication number: 20170104560
    Abstract: An apparatus for coding a plurality of packets in a multi-antenna system, the apparatus including a processor configured to determine space-time codes of the plurality of packets sequentially from a subsequent packet to maximize an average throughput of the plurality of packets, and a transmitter configured to transmit the plurality of packets to an antenna, is provided.
    Type: Application
    Filed: March 3, 2016
    Publication date: April 13, 2017
    Inventors: Hong Won Park, Seok Ho Chang, Mee Sue Shin
  • Publication number: 20170104561
    Abstract: A cellular multiple-input and multiple-output, MIMO, system (10) comprises a base station (20) having a plurality of antennas (22) and a logic (21) which analyzes pilot signals received from a terminal (11-15) at the plurality of antennas (22) to obtain information about radio channel properties between the terminal (11-15; 100) and the plurality of antennas (22). The base station (20) assigns at least two terminals (11-13) of a plurality of terminals (11-15) to a same pilot time slot. The base station (20) requests at least two terminals (11-13) to transmit pilot signals in the allocated pilot time slot in such a manner that the at least two terminals (11, 12; 11-13) are prevented from transmitting their pilot signals simultaneously.
    Type: Application
    Filed: March 25, 2015
    Publication date: April 13, 2017
    Inventors: Kåre Agardh, Vanja Plicanic Samuelsson, Erik Bengtsson, Rickard Ljung
  • Publication number: 20170104562
    Abstract: A communication network's bandwidth may be managed using bandwidth management (“BWM”) and/or bandwidth aggregation (“BWA”) techniques. For example, packets of traffic may be inspected to identify a video stream and/or video sub-streams. The video sub-streams may be partitioned for transmission. For example, the video sub-streams may be partitioned based on a characteristic and/or policies associated therewith. One or more radio access technologies (“RATs”) may be selected for transmitting the video sub-streams. The one or more RATs may be selected according to one or more policies for managing the bandwidth associated with the video. The video sub-streams may be transmitted via a single RAT or a plurality of aggregated RATs.
    Type: Application
    Filed: September 21, 2016
    Publication date: April 13, 2017
    Applicant: VID SCALE, INC.
    Inventors: Serhad Doken, Alexander Reznik
  • Publication number: 20170104563
    Abstract: A wireless device receives a Multi-User Request-To-Send (MU-RTS) frame, descrambles first scrambled data in the MU-RTS frame using a first scrambling sequence, generates second scrambled data using a second scrambling sequence, and transmits a Clear-to-Send (CTS) frame including the second scrambled data in response to receiving the MU-RTS frame. The second scrambling sequence is an N-bit left cyclic shift of the first scrambling sequence. Another wireless device generates first scrambled data using a first scrambling sequence and transmits an MU-RTS frame including the first scrambled data. The wireless device receives a CTS frame transmitted in response to the MU-RTS frame, and descrambles second scrambled data in the CTS frame using a second scrambling sequence. The second scrambling sequence is an N-bit left cyclic shift of the first scrambling sequence. In either device, N may be 7, and lengths of the first and second scrambling sequences may be 127 bits.
    Type: Application
    Filed: October 12, 2016
    Publication date: April 13, 2017
    Inventors: Dae Won LEE, Young Hoon KWON, Yujin NOH, Sungho MOON, Ahmad Reza HEDAYAT
  • Publication number: 20170104564
    Abstract: Embodiments of the present invention disclose a frame transmission method and an apparatus for a wireless local area network, which relate to the field of communications technologies. In the present invention, in a WLAN frame transmission process, a frame sent by a wireless local area network WLAN device is received, and identification of frames of different standards is completed by detecting a format indication field included in the frame, so as to implement backward compatibility of the WLAN device, so that hybrid networking of WLAN devices of different standards can be supported, flexibility of network deployment is improved, and networking complexity is reduced.
    Type: Application
    Filed: December 16, 2016
    Publication date: April 13, 2017
    Inventors: Sheng LIU, Zhou LAN, Teyan CHEN
  • Publication number: 20170104565
    Abstract: A method for transmitting data in a wireless local area network and a device suing the same are provided. The device transmits a plurality of medium access control protocol data units (MPDUs) to at least one destination station. Duration fields in all of the plurality of MPDUs are set to a same value.
    Type: Application
    Filed: December 26, 2016
    Publication date: April 13, 2017
    Inventor: Yong H. SEOK