Reference Indication Consists Of A Gap Patents (Class 370/504)
  • Patent number: 10511464
    Abstract: Disclosed is a baud rate tracking and compensation apparatus comprising: a clock generating component generating a clock; a sampling circuit sampling a reception signal according to the clock and thereby generating a sampled result, and the sampling circuit generating a transition notification signal when the sampled result indicates a transition of the reception signal; a clock counting circuit counting cycles of the clock between a first transition of the reception signal and a second transition of the reception signal according to the clock and the transition notification signal; a bit counting circuit counting bit(s) between the first transition and the second transition according to the clock and a bit cycle; and a calculation circuit dividing the number of the cycles by the number of the bit(s) to obtain a calculation value, and then updating the bit cycle according to the calculation value.
    Type: Grant
    Filed: September 12, 2018
    Date of Patent: December 17, 2019
    Assignee: REALTEK SEMICONDUCTOR CORPORATION
    Inventors: Bixing Ye, Zuohui Peng, Chaoming Li, Qin Zhang, Zhilin Wu
  • Patent number: 10361890
    Abstract: A method can be used for transmission of at least one packet of at least one bit over a serial link capable of taking two different states respectively associated with the two possible logical values of the at least one transmitted bit. Starting from a transmission start time of the at least one bit and up to the expiration of a first portion of a bit time associated with the at least one bit, the link is placed in one of its states depending on the logical value of the at least one bit. Upon the expiration of the first portion of this bit time, a first additional transition is generated over the link so as to place the link in its other state up to the expiration of the bit time.
    Type: Grant
    Filed: October 11, 2018
    Date of Patent: July 23, 2019
    Assignee: STMicroelectronics (Rousset) SAS
    Inventors: Christophe Arnal, Roland Van Der Tuijn
  • Patent number: 10194284
    Abstract: Systems and methods for utilizing unused space in expensive message based communication to embed messages from a sender device to a receiver device to maximize payload usage over a potentially fee-based messaging service. One or more machine-to-machine messages may be embedded in unutilized transport space when other communications, that may potentially be delivered over a fee-based network, are initiated at a device. The machine-to-machine message and other communications may be extracted from a combined message package at a receiving device and processed as if they were independently transported. Machine-to-machine messages may be segmented and embedded across multiple unrelated communication packages and later reassembled.
    Type: Grant
    Filed: September 12, 2012
    Date of Patent: January 29, 2019
    Assignee: Digit International Inc.
    Inventors: Adam D. Dirstine, Christopher Glen Popp
  • Patent number: 10122424
    Abstract: A mobile communication system is a mobile communication system that performs communication between a base station and a user terminal. When a directivity is formed to transmit a radio signal, the base station transmits a first radio signal including identification information to identify the formed directivity and a reference signal. The user terminal receives the first radio signal and transmits a second radio signal including quality information when receiving the reference signal and the identification information. The base station receives the second radio signal and determines the directivity to be formed based on the identification information and the quality information.
    Type: Grant
    Filed: April 7, 2016
    Date of Patent: November 6, 2018
    Assignee: KYOCERA Corporation
    Inventors: Fangwei Tong, Atsuhisa Inakoshi, Kugo Morita, Masato Fujishiro, Chiharu Yamazaki, Akinori Iwabuchi, Tohru Sunaga
  • Patent number: 9673963
    Abstract: Systems, methods, and apparatus for regenerating a data signal and a clock signal are provided. One of the apparatuses include clock regeneration loop circuitry configured to receive an input data signal transmitted without a reference clock signal, and to generate an output reference clock signal having an adjustable clock frequency that substantially matches a data rate of the input data signal; data detection loop circuitry configured to generate a phase offset control signal for adjusting a phase of a clock signal that samples the input data signal, and to generate, based on the phase offset control signal, a sampled input data signal; and an elastic buffer configured to generate, based on the output reference clock signal and the sampled input data signal, an output data signal that substantially aligns with the output reference clock signal, and enable the different adaptation dynamic of the loops.
    Type: Grant
    Filed: April 12, 2016
    Date of Patent: June 6, 2017
    Assignee: Keyssa Systems, Inc.
    Inventors: Jerome Jean Ribo, Bruno Tourette, Pavan Hanumolu
  • Patent number: 9391794
    Abstract: Various implementations of the invention provide methods and apparatuses for generating a test sequence for a driver and channel combination, wherein the driver is non-linear. In various implementations of the invention, a test sequence is generated that produces the worst or near worst error rate of the channel. With various implementations of the invention, voltage waves at the driver and impulse response waves of the channel are generated. In various implementations of the invention, the driver voltage waves and impulse response waves are simulated responses of the driver and channel to a digital signal input. With further implementations of the invention, receiver voltage waves are generated by combining the impulse response wave and the driver voltage waves. Subsequently, a test sequence is selected based upon the combined receiver voltage wave.
    Type: Grant
    Filed: January 30, 2009
    Date of Patent: July 12, 2016
    Assignee: Mentor Graphics Corporation
    Inventor: Vladimir B. Dmitriev-Zdorov
  • Patent number: 9225379
    Abstract: According to various aspects of the present disclosure, devices and methods are disclosed that include communication platform including a small form factor platform having a system-on-package architecture. The system-on-package architecture may be arranged as a stack of layers including: a first layer of the stack of layers having a first conformable material; a second layer of the stack of layers having a second conformable material; a third layer of the stack of layers having a third material, wherein the first conformable material and the second conformable material are more flexible than the third material; and one or more electronic components embedded within the stack of layers, wherein the one or more electronic components are configured to process a received wireless signal.
    Type: Grant
    Filed: July 31, 2014
    Date of Patent: December 29, 2015
    Assignee: INTEL CORPORATION
    Inventors: Debabani Choudhury, Prasad Alluri
  • Patent number: 9042410
    Abstract: Disclosed is a method for conducting communication using a frame structure which supports two or more wireless communication schemes, and an apparatus using the method. A method for constructing an FDD frame according to the present invention efficiently supports a legacy system and an enhanced system using an H-FDD frame structure. Further, the method for constructing an FDD frame according to the present invention efficiently supports a terminal and an H-FDD terminal, which use different communication systems.
    Type: Grant
    Filed: April 20, 2010
    Date of Patent: May 26, 2015
    Assignee: LG Electronics Inc.
    Inventors: Dong Guk Lim, Sung Ho Moon, Han Gyu Cho, Yeong Hyeon Kwon, Jin Sam Kwak
  • Patent number: 8982912
    Abstract: A network component comprising a processor configured to receive a data stream from an upstream node, wherein the data stream comprises a plurality of Ethernet packets and a synchronization request comprising a timestamp, synchronize a clock with the timestamp, and transmit a response to the upstream node, wherein the data stream has the same bandwidth as a second data stream that does not have the synchronization request and the timestamp.
    Type: Grant
    Filed: September 21, 2012
    Date of Patent: March 17, 2015
    Assignee: Futurewei Technologies, Inc.
    Inventor: Serge Francois Fourcand
  • Patent number: 8964791
    Abstract: A method and apparatus automatically maintains a JESD204 serial data link (252) as active by using an idle signal (254) and multiplexer selection circuit (247) to selectively switch signal data samples (246) and dummy samples (0, . . . 0) onto a serial interface input to a JESD module (248) for serialization into a plurality of symbols for transmission over the JESD204 serial data link (252) in response to a transmit clock signal (253) so that serialized symbols generated from signal data samples are transmitted when there are signal data samples available, and serialized symbols generated from dummy samples are transmitted when there are no signal data samples available.
    Type: Grant
    Filed: October 11, 2012
    Date of Patent: February 24, 2015
    Assignee: Freescale Semiconductor, Inc.
    Inventors: Mieu Van Vu, John J. Vaglica
  • Patent number: 8964792
    Abstract: A method and a system for controlling a compressed mode in a macro-diversity state are provided by the disclosure, wherein the method comprises that a terminal and a serving node B determine a compressed mode, wherein the compressed mode comprises: transmission gap pattern sequence information; the terminal and the serving node B start or stop the compressed mode, the terminal or the serving node B indicates a current compressed mode state to a related node B, and the related node B performs compressed mode operation according to the current compressed mode state. According to the disclosure, the problem that the execution state of the compressed mode of the terminal and a network side cannot be synchronized is solved, normal operation of the compressed mode of the terminal is guaranteed, and the service quality of the terminal and the performance of the system are improved.
    Type: Grant
    Filed: May 12, 2011
    Date of Patent: February 24, 2015
    Assignee: ZTE Corporation
    Inventors: Lin Liu, Xiang Cheng, Yazhu Ke
  • Patent number: 8929405
    Abstract: There is provided a method of optimizing timing packet transport in a network node, the method comprising using a locally available stable frequency reference at the network node to provide a pre-determined network node transit time for timing packets in at least one direction into or out of the network node. There is also provided a network node comprising a locally available stable frequency reference and circuitry adapted to apply a pre-determined network node transit time, L, to all timing packets transiting the network node in at least one direction into or out of a network node dependent on the locally available stable frequency reference.
    Type: Grant
    Filed: October 29, 2009
    Date of Patent: January 6, 2015
    Assignee: Telefonaktiebolaget L M Ericsson (Publ)
    Inventors: Stefano Ruffini, Raoul Fiorone, Orazio Toscano
  • Patent number: 8913633
    Abstract: A system and method for time synchronization in a communication network. The communication network includes a plurality of network nodes each having a respective internal clock, and a reference node having a reference clock and each configured transmits synchronization messages within the communication network. At least one network node is configured to determine an estimated reference clock time discretely upon arrival of a synchronization message at the at least one network node. To that end, the at least one network node includes a controller for determining a controlled time comprising a time-continuous estimate of the discreetly estimated reference clock time. The controller is configured to determine the controlled time based on an input that is extrapolated to an execution time instant of the controller, where the execution time instant is separated from the time instant of arrival of the synchronization message by a delay (?tdelay).
    Type: Grant
    Filed: August 24, 2011
    Date of Patent: December 16, 2014
    Assignee: Siemens Aktiengesellschaft
    Inventors: Dragan Obradovic, Ruxandra Scheiterer, Günter Steindl, Philipp Wolfrum
  • Patent number: 8867520
    Abstract: A method and an apparatus for augmenting timing synchronization in a base station using backhaul network frequency synchronization are provided. When in a first mode an external time epoch reference synchronized with system time is used to synchronize the base station to system time. When in a second mode a network frequency reference recovered from a backhaul network link is used to maintain the timing synchronization.
    Type: Grant
    Filed: March 7, 2008
    Date of Patent: October 21, 2014
    Inventors: Charles Nicholls, David Steer, Bradley John Morris
  • Patent number: 8861590
    Abstract: Methods and systems that support downstream media signal insertion into a digital signal without affecting digital signal quality is presented here. The methods and systems can utilize pre-defined bitrate values assigned to media signals and allocate that bitrate to a portion of a digital signal that will be replaced by the media signal. The methods are equally applicable to both open and closed-loop encoding systems.
    Type: Grant
    Filed: July 27, 2006
    Date of Patent: October 14, 2014
    Assignee: ARRIS Enterprises, Inc.
    Inventor: Santhana Krishnamachari
  • Patent number: 8861501
    Abstract: A timing source is provided for sending timing information via a packet network. The source comprises a first clock for generating the timing information and a packet forming section for forming a sequence of packets. An output section in the form of a packet launch control section transmits the packets via the network as packet bursts, each of which comprises a plurality of packets with the intervals between consecutive packets of each burst being less than the intervals between consecutive packets. A time-stamping section inserts into each packet a transmission time derived from the timing information generated by the clock.
    Type: Grant
    Filed: March 19, 2007
    Date of Patent: October 14, 2014
    Assignee: Microsemi Semiconductor Limited
    Inventors: Martin Richard Crowle, Timothy Michael Edmund Frost, Robertius Laurentius Van Der Valk
  • Patent number: 8848743
    Abstract: A method of communicating count value information in an Optical Transport Network (OTN) signal frame. The method comprises determining a count value indicating a number of payload bytes to be sent in a next OTN signal frame; determining that a change in the count value (?) with respect to a current count value is within a predetermined range; selecting an inversion pattern indicating the change in the count value; determining a cyclic redundancy check (CRC) code associated with the inversion pattern; and, inserting the inversion pattern and the CRC code in a Generic Mapping Procedure (GMP) overhead of the OTN signal frame.
    Type: Grant
    Filed: November 29, 2012
    Date of Patent: September 30, 2014
    Assignee: PMC-Sierra US, Inc.
    Inventor: Steven Scott Gorshe
  • Patent number: 8843615
    Abstract: A method of measuring temporal drift of an electronic apparatus linked to a network and capable of providing a time-stamp including capturing at least two messages including a gauge reference time circulating around the network, and determining precision of the time-stamping function of the apparatus as a function of the gauge reference time and of a time-stamp provided by the apparatus. The apparatus can be a network analyzer and each message captured includes at least one Ethernet frame including a gauge reference time in accordance with NTP (Network Time Protocol).
    Type: Grant
    Filed: December 24, 2008
    Date of Patent: September 23, 2014
    Assignee: Airbus Operations S.A.S.
    Inventors: Fabrice Candia, Patrice Casse
  • Patent number: 8811373
    Abstract: Systems, methodologies, and devices are described that facilitate transmitting a guard time parameter to a mobile device to facilitate rate matching data around a guard time region associated with a downlink subframe of a radio frame sequence. A base station transmits the guard time parameter via PBCH or DBCH to the mobile device. The base station rate matches data associated with PDSCH, comprising DBCH, around the guard time region, and transmits PDSCH to the mobile device. The mobile device identifies the guard time parameter and rate matches at least a portion of the information received via the PDSCH around the guard time region to facilitate enhanced reception of PDSCH. Optionally, a radio frame sequence can be structured so that a subframe immediately following a subframe containing DBCH is a downlink subframe, which can be known by the mobile device a priori or based on a downlink subframe parameter.
    Type: Grant
    Filed: August 13, 2008
    Date of Patent: August 19, 2014
    Assignee: QUALCOMM Incorporated
    Inventors: Durga Malladi, Juan Montojo
  • Patent number: 8717972
    Abstract: The present invention provides a method for range extension is wireless communication systems. One embodiment of the method includes determining whether a mobile unit is within a first range corresponding to a range of timing advances supported by a timing advance command. This embodiment also includes transmitting a plurality of timing advance commands to the mobile unit when the mobile unit is outside the first range so that the mobile unit can synchronize with the base station by combining information in the plurality of timing advance commands.
    Type: Grant
    Filed: October 21, 2010
    Date of Patent: May 6, 2014
    Assignee: Alcatel Lucent
    Inventors: Fang-Chen Cheng, Jung Ah Lee
  • Publication number: 20140098706
    Abstract: Communication control equipment is connected to a plurality of communication control equipment via a network and is configured to be time-synchronized with the plurality of communication control equipment by using a time synchronization procedure using a communication including at least request packets and acknowledgement packets. The communication control equipment includes a receiving-interval measurement section configured to measure a receiving interval of request packets from the plurality of communication control equipment; and a queuing-occurrence determination section configured to detect conflict of the request packets from any of the plurality of communication control equipment on a basis of the receiving interval of the request packets measured by the receiving-interval measurement section.
    Type: Application
    Filed: October 3, 2013
    Publication date: April 10, 2014
    Applicant: Hitachi, Ltd.
    Inventors: Tatsuya MARUYAMA, Tsutomu YAMADA, Mitsuyasu KIDO, Shoji YOSHIDA
  • Patent number: 8638775
    Abstract: Aspects of a method and system for sleep mode signaling for a multi-standard system with Bluetooth are provided. In this regard, a first communication system that communicates utilizing TDM may generate a synchronization signal that is communicatively coupled to a second communication system that communicates utilizing TDM. The first communication system may determine one or more timeslots during which it may be inactive. The first communication system may control, based on the determination, an amount of time that the synchronization signal is in one or more states. The second communication system may receive the synchronization signal from the first communication system. The second communication system may determine timeslots during which the first communication system may be inactive based on an amount of time that the synchronization signal is in one or more states. The second communication system may transmit and/or receive at times that are scheduled based on the determination.
    Type: Grant
    Filed: March 11, 2009
    Date of Patent: January 28, 2014
    Assignee: Broadcom Corporation
    Inventor: Steven Hall
  • Patent number: 8594135
    Abstract: The subject matter disclosed herein provides methods and apparatus, including computer program products, for detecting a preamble to enable acquisition of a downlink. In one aspect, there is provided a method. The method may include receiving a plurality of symbols. From an autocorrelation of the received symbols, a guard interval may be detected. The guard interval may represent a receive/transmit transition gap (RTG). A metric may be used to verify whether at least one symbol positioned after the detected guard interval is a preamble. Related systems, apparatus, methods, and/or articles are also described.
    Type: Grant
    Filed: June 14, 2011
    Date of Patent: November 26, 2013
    Assignee: Wi-Lan, Inc.
    Inventors: Ron Porat, Yu Wen, Peter J. Graumann, Srikanth Gummadi
  • Patent number: 8565121
    Abstract: Techniques for improved low latency frequency switching are disclosed. In one embodiment, a controller receives a frequency switch command and generates a frequency switch signal at a time determined in accordance with a system timer. In another embodiment, gain calibration is initiated subsequent to the frequency switch signal delayed by the expected frequency synthesizer settling time. In yet another embodiment, DC cancellation control and gain control are iterated to perform gain calibration, with signaling to control the iterations without need for processor intervention. Various other embodiments are also presented. Aspects of the embodiments disclosed may yield the benefit of reducing latency during frequency switching, allowing for increased measurements at alternate frequencies, reduced time spent on alternate frequencies, and the capacity and throughput improvements that follow from minimization of disruption of an active communication session and improved neighbor selection.
    Type: Grant
    Filed: October 25, 2007
    Date of Patent: October 22, 2013
    Assignee: QUALCOMM, Incorporated
    Inventors: Da-shan Shiu, Li Zhang, Eugene Sy, David Malonado, Upkar Dhaliwal
  • Publication number: 20130177030
    Abstract: In a direct communication between terminals, a terminal transmits a synchronization channel preamble part after transmitting a synchronization channel message part including synchronization information. The terminal receives a dedicated channel including a direct communication packet after transmitting the synchronization channel preamble part. A transition time gap for switching from transmission to reception may be inserted to an end of the synchronization channel preamble part.
    Type: Application
    Filed: January 9, 2013
    Publication date: July 11, 2013
    Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventor: Electronics and Telecommunications Research Institute
  • Patent number: 8483161
    Abstract: Methods for transmitting system information, subframe structures, and pilot structures in a wireless access system are disclosed. A method for receiving system information in a wireless access system includes receiving a Network Common Information (NCI) channel including network common system information from a Base Station (BS), receiving a synchronization channel from the BS, for acquiring synchronization with the BS, receiving a Cell Specific Information (CSI) channel including cell specific system information which is specific to the BS from the BS, and decoding the NCI channel and the CSI channel using the synchronization channel. The NCI channel is transmitted over a first frequency channel and the CSI channel is transmitted over a second frequency channel.
    Type: Grant
    Filed: April 30, 2009
    Date of Patent: July 9, 2013
    Assignee: LG Electronics Inc.
    Inventors: Bin Chul Ihm, Jeong Ki Kim
  • Patent number: 8411809
    Abstract: A cosite interference cancellation system is provided for improved rejection of a signal coupled from a transmission antenna into a local receive antenna in the presence of local multipath. The cosite interference cancellation system and associated method advantageously provide improved signal rejection by continuously controlling (adjusting) a matching time delay to reduce cosite interference.
    Type: Grant
    Filed: January 4, 2012
    Date of Patent: April 2, 2013
    Assignee: BAE Systems Information and Electronic Systems Integration Inc.
    Inventor: Raymond J. Lackey
  • Patent number: 8340134
    Abstract: A method of communicating count value information in an Optical Transport Network (OTN) signal frame. The method comprises determining a count value indicating a number of payload bytes to be sent in a next OTN signal frame; determining that a change in the count value (?) with respect to a current count value is within a predetermined range; selecting an inversion pattern indicating the change in the count value; determining a cyclic redundancy check (CRC) code associated with the inversion pattern; and, inserting the inversion pattern and the CRC code in a Generic Mapping Procedure (GMP) overhead of the OTN signal frame.
    Type: Grant
    Filed: November 4, 2009
    Date of Patent: December 25, 2012
    Assignee: PMC-Sierra, Inc.
    Inventor: Steven Scott Gorshe
  • Patent number: 8306070
    Abstract: Certain aspects of a method and system for speed negotiation for twisted pair links using intelligent elastic first-in-first-out (E-FIFO) in fiber channel systems are disclosed. Aspects of a method may include determination of a priority level based on amount of data in at least one elastic FIFO (E-FIFO) buffer communicatively coupled to at least one of the fiber channel host devices. The E-FIFO buffer may be modified either by insertion or deletion of IDLE words or words from an order set based on the determined priority level. The data may be synchronously communicated between fiber channel host devices communicatively coupled via the twisted pair link based on the modified elastic buffer.
    Type: Grant
    Filed: July 24, 2006
    Date of Patent: November 6, 2012
    Assignee: Broadcom Corporation
    Inventor: Ali Ghiasi
  • Patent number: 8295310
    Abstract: A network component comprising at least one processor configured to implement a method comprising adding a clock synchronization data to a data stream comprising a plurality of Ethernet packets, wherein the clock synchronization data is located in a gap between two of the Ethernet packets. Also disclosed is a method comprising adding a clock synchronization data to a gap between a plurality of Ethernet packets in a data stream, wherein the clock synchronization data comprises a timestamp, a first bit that indicates whether the clock synchronization data is a request or an acknowledgement, and a second bit that indicates a requested operational mode.
    Type: Grant
    Filed: April 16, 2007
    Date of Patent: October 23, 2012
    Assignee: Futurewei Technologies, Inc.
    Inventor: Serge Francois Fourcand
  • Patent number: 8270422
    Abstract: An active/standby switchover device and an active/standby switchover method of an asynchronous backplane in a transport network are provided. A local oscillator clock is adopted to obtain a clock of a working path, so as to replace the clock of the working path tracked in a phase-locked loop mode. An active/standby switchover operation is realized by using the local oscillator clock, so that the implementation cost is greatly reduced, and the hysteresis problem of the phase-locked loop tracking clock during the active/standby clock switchover is eliminated, thereby effectively achieving the lossless switchover of services.
    Type: Grant
    Filed: June 29, 2009
    Date of Patent: September 18, 2012
    Assignee: Huawei Technologies Co., Ltd.
    Inventor: Hui Yin
  • Patent number: 8254510
    Abstract: A method for inter-carrier interference cancellation is provided. A time-domain received signal is detected to obtain information of an inter-symbol interference free region. Multiple cyclic useful symbols are obtained from the time-domain received signal according to the information of the inter-symbol interference free region and a set of multi-step windowing coefficients is generated. Adjusted cyclic useful symbols are obtained by multiplying the cyclic useful symbols by the set of multi-step windowing coefficients, respectively, and then combined in a time domain to obtain a time-domain combination signal. The inter-carrier interference of each of sub-carriers of the time-domain combination signal is centralized on neighboring D sub-carriers. The time-domain combination signal is transformed into a frequency-domain received signal. The frequency-domain received signal and its corresponding channel response matrix are divided into overlapped signal blocks according to D.
    Type: Grant
    Filed: December 23, 2009
    Date of Patent: August 28, 2012
    Assignee: Industrial Technology Research Institute
    Inventors: Jia-Wei Liu, Chorng-Ren Sheu, Ming-Chien Tseng
  • Patent number: 8218651
    Abstract: A method for splicing a first data stream that conveys a first single program transport stream (SPTS) and a second data stream that conveys a second SPTS, the method includes: receiving first data stream metadata units representative of first data stream packets, second data stream metadata units representative of second data stream packets and a request to perform a splicing operation at a n?th splicing point; performing, in response to the splicing request, transport stream layer processing of the first data stream metadata units and of the second data stream metadata units such as to provide a control output stream; and transmitting an output stream in response to the control output stream.
    Type: Grant
    Filed: February 28, 2007
    Date of Patent: July 10, 2012
    Assignee: ARRIS Group, Inc
    Inventors: Amit Eshet, Lior Assouline, Edward Stein
  • Patent number: 8184751
    Abstract: A system and associated method is provided for improved rejection of an interfering signal coupled from a transmission antenna into a local receive antenna in the presence of local multipath. A system of the invention includes a common feedback junction, (i.e., a single sampling point used by all parameter matching control loops), for adjusting a number of distortion matching circuits while advantageously maintaining independence of tuning and other independent circuit actions.
    Type: Grant
    Filed: December 3, 2008
    Date of Patent: May 22, 2012
    Assignee: BAE Systems Information and Electronic Systems Integration Inc.
    Inventor: Raymond J. Lackey
  • Patent number: 8184611
    Abstract: In the present invention, the slave base station attains synchronization with the reference base station through messages transmitted from and received by a mobile station either in the soft handoff region between the reference base station and the slave base station or within a range which allows the mobile station to communicate with the slave base station. When the mobile station is not in communication with both the reference base station and the slave base station, then the round trip delay between the mobile station and the reference base station is measured by the reference base station. The reference base station communicates the PN code used by the mobile station over the reverse link to the slave base station. The slave base station acquires the signal from the mobile station and determines when the signal from the mobile station arrives. The slave base station then makes an estimate as to the length of the delay between transmission of a signal from the mobile station to the slave base station.
    Type: Grant
    Filed: November 13, 2007
    Date of Patent: May 22, 2012
    Assignee: QUALCOMM Incorporated
    Inventors: Edward G. Tiedemann, Jr., Charles E. Wheatley, III
  • Patent number: 8144818
    Abstract: Apparatus and methods for use in a wireless communication system are disclosed for determining a timing position for channel activity in order to resolve timing ambiguity. A disclosed apparatus includes a processor that determines when channel activity occurs in at least one of an early or a late arrival position in a communication channel estimate and unwraps the channel activity in either the early arrival position or the late arrival position to a corresponding late or early arrival unwrapped channel activity position in the wireless channel estimate. The processor correlates symbol data in the communication signal corresponding to both the channel activity and the unwrapped channel activity to symbol data of the main channel activity. The processor determines whether a correct timing position of the channel activity is one of the early or late arrival positions based on the correlations, thus resolving timing ambiguity. Complementary methods are also disclosed.
    Type: Grant
    Filed: December 15, 2005
    Date of Patent: March 27, 2012
    Assignee: QUALCOMM Incorporated
    Inventors: Krishna Kiran Mukkavilli, Michael Mao Wang, Raghuraman Krishnamoorthi
  • Patent number: 8111683
    Abstract: In a cellular radio communication system, a base station or a mobile station has a TA (Time Alignment)-range-out detection function, so that when a TA-range-out state that is unable to compensate with a guard interval is detected, the transmission condition of an uplink signal at the mobile station is changed by the mobile station autonomously or by the base station and the mobile station cooperatively.
    Type: Grant
    Filed: February 24, 2009
    Date of Patent: February 7, 2012
    Assignee: Hitachi, Ltd.
    Inventors: Tomonori Yamamoto, Katsuhiko Tsunehara, Satoshi Tamaki, May Takada, Mikio Kuwahara
  • Patent number: 8111628
    Abstract: A method for measuring Inter-Frequency/Inter-RAT (Radio Access Technology) in Multimedia Broadcast/Multicast Service (MBMS) includes: setting an Inter-Frequency/Inter-RAT measurement time to prevent Inter-Frequency/Inter-RAT measurement time from overlapping constantly the transmission time of MCCH information; performing Inter-Frequency/Inter-RAT measurement by a UE according to the Inter-Frequency/Inter-RAT measurement time. In the present invention, the Inter-Frequency/Inter-RAT measurement time can be prevented from overlapping constantly the time when UTRAN transmits the MCCH information, so that the problem that the UE cannot receive MCCH information during Inter-Frequency/Inter-RAT measurement time may be solved. In the invention, a measurement time setting device is also provided for implementing Inter-Frequency/Inter-RAT measurement in Multimedia Broadcast/Multicast Service.
    Type: Grant
    Filed: April 21, 2006
    Date of Patent: February 7, 2012
    Assignee: Huawei Technologies Co., Ltd.
    Inventor: Liyan Yin
  • Patent number: 8098770
    Abstract: Apparatus and methods for estimating transmission noise in a programming information signal. Channel noise power in binary phase shift keying (“BPSK”) modulated telecommunication may be estimated. Such a method may include receiving over the channel a reference signal and a data BPSK signal. The data BPSK signal may include the programming information. The method may include formulating a channel transfer function estimate for the channel based on the reference signal. The estimate may include a channel estimation error. The data BPSK signal may be equalized using the transfer function estimate. The data BPSK signal may include noise, which may be quantified in terms of power. The data BPSK signal noise power may be estimated in such a manner that is independent of the channel estimation error.
    Type: Grant
    Filed: May 6, 2008
    Date of Patent: January 17, 2012
    Assignee: Broadcom Corporation
    Inventor: Eliahu Shusterman
  • Patent number: 8094764
    Abstract: A cosite interference cancellation system is provided for improved rejection of a signal coupled from a transmission antenna into a local receive antenna in the presence of local multipath. The cosite interference cancellation system and associated method advantageously provide improved signal rejection by continuously controlling (adjusting) a matching time delay to reduce cosite interference.
    Type: Grant
    Filed: December 3, 2008
    Date of Patent: January 10, 2012
    Assignee: BAE Systems Information and Electronic Systems Integration Inc.
    Inventor: Raymond J. Lackey
  • Patent number: 7995622
    Abstract: A method for digital clock smoothing is provided. The method comprises: (A) inputting an asynchronous data stream having an asynchronous symbol rate into a FIFO two-port memory block; (B) obtaining FIFO depth B by subtracting modulo B for each stored symbol a symbol output address from a symbol input address; (C) inputting FIFO depth B into a programmable look-up table (LUT); (D) obtaining a phase detector error signal; (E) scaling the phase detector error signal to obtain a scaled error factor; (F) adding the scaled error factor to a nominal phase step to obtain a phase update; (G) obtaining a smoothed symbol rate; and (H) reading out each output symbol from FIFO under control of an output FIFO address control register at the smoothed symbol rate.
    Type: Grant
    Filed: October 5, 2009
    Date of Patent: August 9, 2011
    Assignee: Wideband Semiconductor, Inc.
    Inventors: Richard John Fagerlund, James P. Flynn, Mark Fong, David Bruce Isaksen
  • Patent number: 7996028
    Abstract: Data is synchronized between a mobile device and a computing device over a wireless link. Synchronization operations are scheduled according to a synchronization schedule that is based on a current time of day. In one embodiment, the day can be divided into different time periods by the user. The user can also specify the frequency with which synchronization operations are to be performed during each specified period. Further, the user can specify an override schedule which overrides the ordinary synchronization schedule established by the user when override criteria are present. For instance, if the mobile device is roaming, the synchronization schedule will be dictated by the override schedule, which may sync much less often, or not until a specific user synchronization request has been received. The present invention can be embodied both as a method and as a apparatus.
    Type: Grant
    Filed: August 31, 2010
    Date of Patent: August 9, 2011
    Assignee: Microsoft Corporation
    Inventors: Sandra I. Vargas, David R. Williamson, Gary W. Hall, Michael A. Foster, Juan V. Esteve Balducci
  • Patent number: 7986717
    Abstract: A transmitting system inserts runt abort packets in an outgoing data stream during idle time inter-frame time fill. The runt abort packets cause the receiving system to synchronize itself to the transmitting system so that even if an error during inter-frame time fill causes the receiving system to go into an erroneous state, the receiving system will be synchronized with the transmitting system before receiving valid data. In one embodiment, the transmitting system transmits data in packets over SONET. The packet data is scrambled at the transmitting end and descrambled at the receiving end. Runt abort packets sent during inter-frame time fill resynchronize the descrambler. If there is an error in the inter-frame time fill bytes, causing the receiving end descrambler to no longer be synchronized with the transmitting end scrambler, the runt abort packets will cause the descrambler to resynchronize state with the transmitting scrambler.
    Type: Grant
    Filed: June 26, 2009
    Date of Patent: July 26, 2011
    Assignee: Juniper Networks, Inc.
    Inventors: Dennis C. Ferguson, Devereaux C. Chen, Eric M. Verwillow, Ramesh Padmanabhan, Thomas Michael Skibo
  • Patent number: 7936792
    Abstract: The present invention relates to serial asynchronous transmission of data of fixed length in which a start bit and a stop bit are inserted at the head and tail, respectively, of the data. The insertion of a fixed bit having a predetermined logical value every predetermined number of bits of the data allows an idle state period to be reduced up to the predetermined number of bits plus 1 bit, resulting in considerable improvement in transmission efficiency.
    Type: Grant
    Filed: February 22, 2005
    Date of Patent: May 3, 2011
    Assignee: Fujitsu Limited
    Inventor: Masahiro Yoshimoto
  • Patent number: 7895355
    Abstract: Systems and methods are described which allow the detection of gaps in a set of data. These systems and methods may include defining streams of data from a network topology, associating incoming data with one or more of these streams, and processing these streams. A gap may be detected by comparing the times of events in the stream. If a gap is detected remedial action may be taken, and processing of the streams temporarily halted. Processing of the streams may continue when data for a certain stream is received, or after the lapse of a certain period of time.
    Type: Grant
    Filed: November 6, 2009
    Date of Patent: February 22, 2011
    Assignee: Vignette Software LLC
    Inventors: John C. Artz, Jr., Heeren Pathak
  • Patent number: 7855994
    Abstract: In a mobile communication system, multiple transceivers perform radio communications in the same frequency band.
    Type: Grant
    Filed: April 26, 2006
    Date of Patent: December 21, 2010
    Assignee: NTT DoCoMo, Inc.
    Inventors: Hiromasa Fujii, Takatoshi Sugiyama, Hitoshi Yoshino
  • Patent number: 7813460
    Abstract: Method and apparatus for sampling a high-speed digital signal include providing a data signal to a differential data input circuit, an offset control signal, and a strobe pulse. In response to the strobe pulse, the data signal is resolved into an output logic state based to a relatively greater extent on the differential data signal and to a relatively lesser extent on the offset control signal.
    Type: Grant
    Filed: September 30, 2005
    Date of Patent: October 12, 2010
    Assignee: SLT Logic, LLC
    Inventor: Alan Fiedler
  • Patent number: 7764713
    Abstract: Synchronization of related packet data network streams is provided. Synchronization is achieved by inserting synchronization packets into data streams that are to be aligned with one another after transmission of those data streams across a network. More particularly, corresponding synchronization packets are inserted into the corresponding data streams at the same time, to serve as markers for performing synchronization of the data at the receiving end. The corresponding data streams may comprise an audio data stream and a corresponding video data stream.
    Type: Grant
    Filed: September 28, 2005
    Date of Patent: July 27, 2010
    Assignee: Avaya Inc.
    Inventors: Cherian Abraham, Timothy Connal Delaney, Nevill Inglis, Karen Phelan, Luke Anthony Tucker
  • Patent number: 7702946
    Abstract: A clock filter circuit (20), which serves for filtering the clock of non-isochronous data signals having a selected one of at least two nominal data rates, has an auxiliary clock source (21) that generates an auxiliary clock signal (27) with a pulse repetition rate which is in the range between the at least two predetermined data rates, a delay line (22) connected to the auxiliary clock source (21) for creating a set of mutually delayed copies of the auxiliary clock signal and a multiplexer (23) that switches in a cyclic order between the delayed copies according to predetermined rules, which depend on the selected data rate to generate a filtered clock signal (28). A control circuit determines whether the rate of the filtered clock (28) signal must be increased or decreased as compared to said data signal and controls the multiplexer (23) to delay or advance the cyclical switching accordingly.
    Type: Grant
    Filed: November 15, 2005
    Date of Patent: April 20, 2010
    Assignee: Alcatel
    Inventors: Michael Joachim Wolf, Wolfgang Thiele
  • Patent number: 7688863
    Abstract: Methods and apparatus for sharing network bandwidth between devices connected to a bus are presented. Each of the devices belongs to one of a number of device classes. Each device class is associated with a respective data transfer rate at which information may be exchanged over the bus. An exemplary method includes the step of assigning a gap interval to each device based on at least the data transfer rate of the class to which the device belongs, the assigned gap interval being inserted between portions of a data stream sent by the corresponding device over the bus. The assigned gap interval may be inserted between portions of a data stream sent by the corresponding device over the bus to achieve the desired data rate resulting in an equitable sharing of bandwidth between the devices connected to the bus.
    Type: Grant
    Filed: September 25, 2002
    Date of Patent: March 30, 2010
    Assignee: Renesas Technology America, Inc.
    Inventor: Robert L. Chamberlain