Feedback To Transmitter For Comparison Patents (Class 714/750)
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Patent number: 7757148Abstract: A method (100) of operating an Automatic Repeat Request (ARQ) transmitter (102) and an ARQ receiver (104) suspends an ARQ reset under circumstances where an ARQ reset would be superfluous. When a transmitter has a final currently-available data block, it deactivates its transmitter ARQ sync loss timer (172) and transmits a ‘suspend ARQ reset’ signal (122). Upon receipt of the ‘suspend ARQ reset’ signal (122), the receiver deactivates its receiver ARQ sync loss timer (176) and sends ARQ feedback (128). At this point, the ARQ connection can be maintained without superfluous ARQ resets even when no ARQ data blocks are being sent. When resuming transmission of ARQ data blocks, the transmitter activates its transmitter ARQ sync loss timer (182) and transmits an ARQ data block (142). The receiver receives the ARQ data block, activates its receiver ARQ sync loss timer (186) and sends ARQ feedback (148).Type: GrantFiled: May 25, 2006Date of Patent: July 13, 2010Assignee: Motorola, Inc.Inventors: Wim Schaap, Marcel Korndewal, Leon J. Zegers
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Publication number: 20100174962Abstract: A method for a receiver to provide a plurality of feedbacks to a transmitter, the plurality of feedbacks for use by the transmitter to determine data retransmission. The method includes: mapping the plurality of feedbacks to a sequence of symbols; and transmitting the sequence of symbols to the transmitter.Type: ApplicationFiled: November 12, 2009Publication date: July 8, 2010Inventor: Yan-Xiu ZHENG
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Patent number: 7747921Abstract: An encoder/decoder system usable to decrease the probability of a failed transmission over a lossy wireless network. In one embodiment, data packets unsuccessfully sent over the wireless network may be retransmitted a particular number of times, depending on how important the data in the lost packet is. In another embodiment, the probability of successful decoding at the client side may be done by signaling to the server side that multiple reference frames should be used for subsequent prediction operations.Type: GrantFiled: August 5, 2005Date of Patent: June 29, 2010Assignees: Sony Corporation, Sony Electronics Inc.Inventor: Behram DaCosta
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Publication number: 20100146358Abstract: The invention relates to a method in a radio base station and user equipment, and comprises varying the transmitted timings of the HARQ feedback signalling such that only users with orthogonal pre-coding vectors (W) are scheduled simultaneously, to reduce multi-user interference and to ensure that said signalling is received by a transmitter before the start of the next retransmission.Type: ApplicationFiled: April 30, 2008Publication date: June 10, 2010Applicant: TELEFONAKTIEBOLAGET L M ERICSSSON (PUBL)Inventors: Muhammad Kazmi, Jingyi Liao
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Publication number: 20100146357Abstract: Regular data packets are scheduled for transmission from a sender to multiple receivers in a multicast ARQ system. In a joint scheduling and encoding procedure, a composite data packet is formed as a weighted linear combination of regular data packets. The corresponding coding weights are adapted based on feedback information from the receivers about received data packets such the composite packet represents a new linearly independent coding of regular data packets different from any multicast data packet previously received each receiver in a selected set of the receivers during the multicast session. In addition, using a weight vector with at least two different non-zero coding weights adds a further degree of freedom and guarantees the ability to always form a composite data packet that represents a new linearly independent coding for transmission.Type: ApplicationFiled: November 29, 2006Publication date: June 10, 2010Inventor: Peter Larsson
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Publication number: 20100146359Abstract: Certain embodiments of the present disclosure propose techniques for improving automatic repeat request (ARQ) feedback messages to reduce unnecessary transmissions by notifying the transmitter of the last acknowledged block in the ARQ feedback message.Type: ApplicationFiled: October 31, 2009Publication date: June 10, 2010Applicant: QUALCOMM INCORPORATEDInventors: Quanzhu Duan, Chun Woo Lee, Jong Ro Park
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Patent number: 7724657Abstract: The present invention is generally directed towards a remote access architecture for providing peer-to-peer communications and remote access connectivity. In one embodiment, the remote access architecture of the present provides a method for establishing a direct connection between peer computing devices via a third computing device, such as a gateway.Type: GrantFiled: July 22, 2005Date of Patent: May 25, 2010Assignee: Citrix Systems, Inc.Inventors: Goutham P. Rao, Robert A. Rodriguez, Eric R. Brueggemann
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Patent number: 7715347Abstract: A method of assigning feedback information in a portion of a Medium Access Control (MAC) channel in a wireless communication system is disclosed. More specifically, the method includes receiving at least two pilot signal from an access network (AN) on at least two forward traffic channel, transmitting at least two channel quality information on a single reverse carrier to the AN reporting at least one of strength and quality of each corresponding forward pilot channel, wherein the channel quality information indicates a desired data rate for receiving data on the corresponding forward traffic channel, and receiving feedback information through a forward control channel of the AN, wherein the feedback information includes combined channel quality information which indicates whether or not the AN is able to receive multiple channel quality information sent by an access terminal (AT) on the single reverse carrier.Type: GrantFiled: September 21, 2006Date of Patent: May 11, 2010Assignee: LG Electronics Inc.Inventors: Young C. Yoon, Li-Hsiang Sun, Suk Woo Lee
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Patent number: 7712006Abstract: A system for conveying information includes a signal transport device. The signal transport device includes a set of links operable to convey a first set of information signals from a first computer module to a second computer module and a link operable to convey a transaction request credit signal associated with the first set of information signals, the signal indicating whether at least a portion of a transaction request message may be sent using the first set of information signals. The device also includes a set of links operable to convey a second set of information signals in the opposite direction of the first set of information signals and a link operable to convey a transaction request credit signal associated with the second set of information signals, the signal indicating whether at least a portion of a transaction request message may be sent using the second set of information signals.Type: GrantFiled: December 4, 2002Date of Patent: May 4, 2010Assignee: Silicon Graphics InternationalInventor: Steven C. Miller
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Patent number: 7712014Abstract: A testing circuit includes a signal generator operative to provide a control signal in response to a reference clock signal. The control signal may include both alignment and timing information operative to synchronize the timing and output of the signal generator with a device under test. A clock recovery instrument is electrically coupled to the signal generator. The clock recovery instrument generates the reference clock signal in response to a clock signal from the device under test. The reference clock signal is synchronized with the clock signal from the device under test such that signal generator operation is synchronized with the device under test independent of the behavior of the device under test.Type: GrantFiled: May 9, 2007Date of Patent: May 4, 2010Assignee: Synthesys Research, Inc.Inventor: Bent Hessen-Schmidt
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Patent number: 7689892Abstract: A method of adaptive error correction coding includes processing data during a connection between a transmitting entity and a receiving entity, where the data is processed in accordance with a predetermined coding scheme. More particularly, processing data includes encoding one or more sequences received by an error correction encoder of the transmitting entity, or decoding one or more block codes received by an error correction decoder of the receiving entity. During the connection, then, the method includes selecting or receiving a selection of feedback code information. Thus, during at least a portion of the connection, the data processing is switched to processing data in accordance with a parity-check coding technique based upon the feedback code information.Type: GrantFiled: September 7, 2005Date of Patent: March 30, 2010Assignee: Nokia CorporationInventors: Victor Stolpman, Tejas Bhatt, Nico van Waes, Jian Zhong Zhang, Amitabh Dixit
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Patent number: 7688913Abstract: P/S conversion section 302 performs parallel/serial conversion of data sequences #1 through #4 input in parallel, in accordance with control by assignment control section 303, so that data to a higher-priority communication terminal is assigned to an upper bit in one symbol; M-ary modulation section 304 performs M-ary modulation on the data that has been subject to parallel/serial conversion; S/P conversion section 305 converts a symbol that has been subject to M-ary modulation to parallel form; multipliers 306-1 through 306-4 execute spreading processing on the symbols output in parallel; multiplexing section 309 multiplexes the symbol that has been subject to spreading processing with an assignment notification signal that has been subject to spreading processing; and radio transmitting section 310 transmits the multiplex signal.Type: GrantFiled: July 15, 2008Date of Patent: March 30, 2010Assignee: Panasonic CorporationInventors: Atsushi Matsumoto, Mitsuru Uesugi, Kenichi Miyoshi, Toshiyuki Uehara
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Patent number: 7688855Abstract: A method for sending a multi-rate multi-receiver message containing a multi-receiver multi-response aggregate. The multi-rate multi-receiver aggregate is transmitted until a multi-receiver multi-response aggregate embedded within the multi-rate multi-receiver aggregate is encountered. Transmission of the multi-rate multi-receiver aggregate is suspended for a predetermined time period. After the expiration of the predetermined time period, transmission of the multi-rate multi-receiver aggregate resumes.Type: GrantFiled: January 11, 2005Date of Patent: March 30, 2010Assignee: Cisco Technology, Inc.Inventor: Lu Qian
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Publication number: 20100077274Abstract: Operations of a relay are disclosed. To perform a hybrid automatic repeat request (HARQ), the relay receives a plurality of codewords from a base station and transmits a status indicator with respect to the plurality of codewords to the base station. The status indicator is a signal informing the base station about whether or not the configuration of an HARQ has been changed. Although a backhaul link and an access link are asymmetric, HARQ operation can be achieved.Type: ApplicationFiled: September 25, 2009Publication date: March 25, 2010Inventors: Hak Seong Kim, Eun Sun Kim, Byeong Geol Cheon, Bong Hoe Kim
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Patent number: 7679370Abstract: A controller having discrete driver circuitry for driving an electrical load and a method are provided. The controller includes a microprocessor having ports configurable to operate as inputs or outputs. The controller also includes discrete driver circuitry connected to ports of the microprocessor. The discrete driver circuitry is configured to apply electrical power to drive an electrical load. The controller further has logic for configuring the ports of the microprocessor as an output to enable on/off of the output signal that drives the electrical loads, and further for configuring the ports of the microprocessor as an input to receive feedback signals from the discrete driver circuitry. The feedback signals are processed to detect fault conditions.Type: GrantFiled: February 9, 2007Date of Patent: March 16, 2010Assignee: Delphi Technologies, Inc.Inventor: Balakrishnan V. Nair
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Patent number: 7681101Abstract: In one embodiment, a hybrid packet repair scheme adaptively switches among unicast retransmission, multicast retransmission, and Forward Error Correction (FEC) depending on the receiver population and the nature of the error prompting the repair operation. The NACK patterns are used to heuristically determine the degree of correlation among packet losses. In an additional embodiment, wasting bandwidth and processing on retransmissions of FEC that will fail to correct the errors is avoided by evaluating the nature of the error and the bandwidth needed to optimally repair it. Unicast retransmission, multicast retransmission, or FEC repair is then dynamically performed according to the loss patterns derived from the NACK arrivals and other network conditions.Type: GrantFiled: April 16, 2007Date of Patent: March 16, 2010Assignee: Cisco Technology, Inc.Inventors: David Oran, William VerSteeg
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Patent number: 7676724Abstract: Methods and apparatus are presented for dynamically controlling the re-transmission scheme of acknowledgment signals. A source transmits a first data packet over a slot s1. If channel conditions are favorable, source transmits a second data packet over slot s2, which precedes the reception of any acknowledgment signals. A destination receives first data packet over slot d1 and second data packet over slot d2. Destination decodes first data packet during slots d2 and d3, and second data packet over slots d3 and d4. Destination transmits an acknowledgment signal (ACK1) associated with first data packet during slot d4. Rather then transmitting the second ACK1 associated with first data packet over slot d5, destination preempts this slot with an acknowledgment signal ACK2, which is associated with second data packet transmitted by source. Hence, destination is configured to overwrite the repetition of a previous acknowledgment in order to transmit a new acknowledgment.Type: GrantFiled: November 21, 2006Date of Patent: March 9, 2010Assignee: Qualcomm IncorporatedInventor: Stein A. Lundby
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Publication number: 20100054164Abstract: A new random linear network coding scheme for reliable communications for time division duplexing channels is proposed. The setup assumes a packet erasure channel and that nodes cannot transmit and receive information simultaneously. The sender transmits coded data packets back-to-back before stopping to wait for the receiver to acknowledge (ACK) the number of degrees of freedom, if any, that are required to decode correctly the information. Provided herein is an analysis of this problem to show that there is an optimal number of coded data packets, in terms of mean completion time, to be sent before stopping to listen. This number depends on the latency, probabilities of packet erasure and ACK erasure, and the number of degrees of freedom that the receiver requires to decode the data. This scheme is optimal in terms of the mean time to complete the transmission of a fixed number of data packets.Type: ApplicationFiled: August 28, 2009Publication date: March 4, 2010Applicant: Massachusetts Institute of TechnologyInventors: Daniel E. Lucani, Milica Stojanovic, Muriel Medard
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Patent number: 7673211Abstract: Methods for efficiently controlling the retransmission of data units in a wireless telecommunication system, wherein multiple complementary feedback mechanisms are used to control retransmission. A receiver attempts to decode each received data unit. If a data unit is successfully decoded, the receiver transmits positive feedback to the transmitter; if a data unit is not successfully decoded, the receiver transmits negative feedback to the transmitter. In all cases, the transmitter employs at least first and second feedback mechanisms for transmitting the positive and negative feedback.Type: GrantFiled: May 17, 2006Date of Patent: March 2, 2010Assignee: Telefonaktiebolaget L M Ericsson (Publ)Inventors: Michael Meyer, Henning Wiemann, Johan Torsner, Mats Sagfors, Jung-Fu Cheng
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Publication number: 20100050041Abstract: An apparatus and a method for generating an Automatic Repeat reQuest (ARQ) feedback message in a wireless communication system are provided. A method for generating an ARQ feedback message at a receiving end in a wireless communication system includes, generating first ARQ feedback information of a first scheme, the first ARQ feedback information comprising information of a first erroneous ARQ block of one or more ARQ blocks for which the ARQ feedback is not performed, generating second ARQ feedback information of a second scheme indicative of error of at least one ARQ block not represented in the first ARQ feedback information, generating an ARQ feedback message comprising the first ARQ feedback information and the second ARQ feedback information, and transmitting the ARQ feedback message to a transmitting end.Type: ApplicationFiled: August 20, 2009Publication date: February 25, 2010Applicant: SAMSUNG ELECTRONICS CO. LTD.Inventors: Young-Bin CHANG, Taori RAKESH, Won-Il LEE, Jae-Young KIM, Anil AGIWAL
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Patent number: 7653857Abstract: A transmitter for a packet radio network, including means for transmitting a signal including data packets to a receiver, means for receiving acknowledgement messages from the receiver, each acknowledgement message indicating whether or not a data packet was received successfully, and means for adjusting transmit power of the signal in the transmitter on the basis of one or more acknowledgement messages.Type: GrantFiled: February 10, 2006Date of Patent: January 26, 2010Assignee: Nokia CorporationInventors: Phan van Vinh, Ling Yu, Markku J. Vainikka
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Publication number: 20090319854Abstract: Extending acknowledgement messages from two states to at least three states is described, whereby such messages constitute a packet quality indication (PQI) reflecting quality or usability of the received signal. In an HARQ system, a transmitting station can flexibly select a better alternative for the next information to transmit on the basis of such PQI. One aspect includes determining how best to correct an unsuccessful packet transmission based on quality information about the specific packet. Implementing apparatus and procedures are described.Type: ApplicationFiled: August 6, 2009Publication date: December 24, 2009Applicant: VIA Telecom Co., Ltd.Inventors: Feng Qian, Stanislaw Czaja
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Publication number: 20090292965Abstract: A method of transmitting wireless data and a recorded medium storing a computer program therefor. The method of transmitting data by a sender coupled to a receiver through a network can include transmitting a data frame having an Initiation field to the sender and transmitting a plurality of data frames corresponding to the Initiation field. The present invention can improve the completion rate of data transmission under an extremely-poor wireless environment.Type: ApplicationFiled: May 31, 2007Publication date: November 26, 2009Inventors: Soo-Hyun Park, Soo-Young Shin, Yoo-Jin Jung
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Patent number: 7623478Abstract: There are in a network comprising at least one transmitter transmitting PDUs according to an ARQ protocol, one receiver receiving transmitted PDUs and acknowledging PDUs with FeedBack Information (FBI) message(s), and a Radio Resource Management (RRM) unit allocating resource based on a TDMA scheme providing series of Time Frames (TFs). The transmitter sends PDUs to the receiver and manages a transmitter ARQ sliding window. The receiver sends back one or more FBI messages to the transmitter and manages a receiver ARQ sliding window. The transmitter, upon reception of FBI message, updates its ARQ sliding window according to received feedback acknowledgement status information, and retransmits PDUs based on its ARQ sliding window. The RRM unit receives FBI messages and manages an extended ARQ sliding window updated according to them. The RRM unit allocates an amount of forward resource and an amount of backward resource, computed based on the extended ARQ sliding window, to the transmitter.Type: GrantFiled: May 16, 2005Date of Patent: November 24, 2009Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Gwillerm Froc, Corinne Rosier
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Publication number: 20090276677Abstract: A radio communications device includes a first error detection part configured to perform error detection on a header included in a packet; a determination part configured to determine whether there is consistency with respect to the length of the packet based on the header in response to the first error detection part detecting no error in the header; a decryption part configured to decrypt the packet in response to the determination part determining that there is consistency with respect to the length of the packet; and a second error detection part configured to perform error detection on the packet in response to the determination part determining that there is consistency with respect to the length of the packet, wherein the decryption part is configured to start to decrypt the packet before completion of the error detection by the second error detection part.Type: ApplicationFiled: March 19, 2009Publication date: November 5, 2009Applicant: FUJITSU LIMITEDInventors: Miyoshi Saito, Koichi Suzuki
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Patent number: 7607062Abstract: Fast recovery from losses is an important problem for reliable data communication protocols. The Internet standard TCP protocol (Transmission Control Protocol) implements two algorithms for that: an original one based on a special timer, and a later addition to TCP that is triggered when there are three packets received by the client after the missing one. Web communications are most frequently carrying rather small objects that are generally ineligible for anything other than timeout-based retransmission schemes. The present invention describes a system delivering performance improvements to TCP (and other reliable data communication protocols) that are compliant with present Internet standards. One improvement is to send duplicates of packets without waiting for a timeout to occur. Another is to split particular parts of a data stream into smaller packets. A third is to send packets out-of-order to force the remote host to acknowledge all packets that were successfully received.Type: GrantFiled: March 25, 2003Date of Patent: October 20, 2009Assignee: Akamai Technologies, Inc.Inventors: Adam J. Grove, Michael Kharitonov, Alexei Tumarkin
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Patent number: 7600173Abstract: A retransmission control method comprising: generating N parity check matrices; generating a generator matrix containing a check symbol generator matrix contained in the first parity check matrix; transmitting the codeword generated by using the generator matrix to another communications device; generating, when the communications device receives a NAK in response to the codeword, a first additional parity by using the second parity check matrix; and retransmitting the first additional parity to the another communications device.Type: GrantFiled: April 28, 2004Date of Patent: October 6, 2009Assignee: Mitsubishi Electric CorporationInventor: Wataru Matsumoto
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Publication number: 20090249158Abstract: A method for packet retransmission employing feedback information is disclosed. The method for packet retransmission employing feedback information comprises receiving reception acknowledgement information from a receiver after a transmitter transmits packets, the reception acknowledgement information representing channel status information and decoding success/failure of the packets; and changing a retransmission mode in accordance with the channel status information if the reception acknowledgement information represents decoding failure, and transmitting retransmission packets of the packets in accordance with the changed retransmission mode. Thus, it is possible to improve decoding probability of the receiver and increase efficiency of retransmission.Type: ApplicationFiled: January 5, 2009Publication date: October 1, 2009Inventors: Min Seok Noh, Yeong Hyeon KWON, Jin Sam Kwak, Dong Cheol Kim, Sung Ho Moon, Seung Hee Han, Hyun Woo Lee
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Publication number: 20090235139Abstract: A HARQ processing method is disclosed, by which a measurement gap is considered. In particular, as a terminal performs an inter-measurement operation, if HARQ feedback information reception is impossible, the terminal determines HARQ feedback information, which is not received for a next HARQ operation, as ACK or NACK by itself and is then able to perform the next HARQ operation. Specifically, in case that the terminal operates by determining the non-received HARQ feedback information as ACK, a corresponding uplink signal keeps being stored in an HARQ buffer and can be retransmitted according to a new UL grant reception from a base station.Type: ApplicationFiled: March 12, 2009Publication date: September 17, 2009Applicant: LG ELECTRONICS INC.Inventors: Sung Jun Park, Seung June Yi, Young Dae Lee, Sung Duck Chun
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Publication number: 20090217120Abstract: A disclosed radio communications apparatus performs at least an automatic repeat request control and performs radio communications using a frame that occupies predetermined plural frequency bands. This apparatus includes a reception portion that receives feedback information about each of a plurality of frequency bands from a communications party, a determination portion that determines which frequency band among the plural frequency bands is to be used to retransmit a retransmission packet indicated by the feedback information, and a transmission portion that transmits the retransmission packet using. one or more determined frequency bands.Type: ApplicationFiled: March 28, 2006Publication date: August 27, 2009Applicant: NTT DOCOMO, INC.Inventors: Mamoru Sawahashi, Kenichi Higuchi, Hiroyuki Atarashi
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Patent number: 7570076Abstract: A capacitor circuit and method to reduce layout area, leakage current, and to improve yield is disclosed. The circuit includes an output terminal (100), a plurality of circuit elements (322, 326, 330), and a plurality of transistors (320, 324, 328). Each transistor has a control terminal (314, 316, 318) and a current path coupled between the output terminal and a respective circuit element of the plurality of circuit elements. A control circuit (300) has a plurality of output terminals (314, 316, 318). Each output terminal is coupled to the control terminal of a respective transistor of the plurality of transistors. The control circuit produces control signals at respective output terminals to selectively turn off at least one transistor and turn on at least other transistors of the plurality of transistors at a first time.Type: GrantFiled: October 13, 2004Date of Patent: August 4, 2009Assignee: Texas Instruments IncorporatedInventors: Andrew Marshall, Karan Singh Bhatia
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Patent number: 7562278Abstract: A data frame includes multiple data blocks that are block encoded in a forward error correction (FEC) scheme. When received data blocks are corrupted, encoded versions of the data blocks are stored, and retransmission of the corrupted data blocks is requested. Upon receiving retransmitted data blocks, the retransmitted encoded data blocks are combined with stored encoded data blocks prior to decoding.Type: GrantFiled: December 29, 2005Date of Patent: July 14, 2009Assignee: Intel CorporationInventors: Mikhail Lyakh, Konstantin Zakharchenko
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Publication number: 20090158111Abstract: Error correcting codes (ECCs) have been proposed to be used in high frequency memory devices to detect errors in signals transmitted between a memory controller and a memory device. For high frequency memory devices, ECCs have delay characteristics of greater than one clock cycle. When the delay exceeds one clock cycle but is much less than two clock cycles, an entire second clock cycle must be added. By calculating and comparing the ECC value in a static logic circuit and a dynamic logic circuit, the logic delay is substantially reduced. In addition, the ECC value may be calculated and compared using two sets of static logic gates, where the second static logic gate is clocked by a clock signal that is delayed relative to the clock signal of the first set of logic gates.Type: ApplicationFiled: December 17, 2007Publication date: June 18, 2009Applicant: Micron Technology, Inc.Inventor: James Brian Johnson
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Patent number: 7546508Abstract: The use of a cellular system's packet data channel for transport of speech communications is enhanced by dynamically controlling the transmission of data packets that were received in error and notified to the transmitter by the receiver in accordance with an algorithm that takes into account a self-generated determination of the perceptual quality importance of the frame and is generated once for each frame by the speech encoder. The calculation of the frame importance is codec-dependent, and depends on a number of attributes associated with each particular frame, including the frame rate (for variable-rate codecs), signal classification, transition characteristics, background noise, previous frame erasures, etc. The selective reduction in transmission and retransmission increases the capacity of the cellular system while maintaining or even improving the quality of the received voice signal.Type: GrantFiled: December 19, 2003Date of Patent: June 9, 2009Assignee: Nokia CorporationInventor: Steven Craig Greer
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Patent number: 7530001Abstract: Packet data consist of preamble information, header information, transmitting information and an error detection code arranged in the order are generated to be transmitted to wireless communications apparatus. When data transmitted from the wireless communications apparatus are received, it is determined whether or not a correlation value of the received data with predetermined preamble information is equal to or larger than a predetermined threshold. When the correlation value is equal to or larger than the threshold, then it is determined whether or not there are next header information and transmitting information to be transmitted. Finally, next packet data based on the next header information and transmitting information are transmitted. Packet data will not be retransmitted even when bit error exists in a response signal, thus making it possible to improve the transmission efficiency.Type: GrantFiled: January 10, 2006Date of Patent: May 5, 2009Assignee: Oki Semiconductor Co., Ltd.Inventor: Toshimichi Naoi
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Patent number: 7526707Abstract: A pseudo-random bit interleaver and de-interleaver comprising a source for generating pseudo-random numbers and transformation logic that transforms each pseudo-random number generated by the source into a plurality of different pseudo-random numbers. Each of the transformed pseudo-random numbers identifying a parity equation to which an incoming bit will be assigned for computing parity.Type: GrantFiled: February 1, 2005Date of Patent: April 28, 2009Assignee: Agere Systems Inc.Inventors: Peter Stroud, Jonathan Ashley, Hongwei Song, Zachary Keirn
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Publication number: 20090094498Abstract: An Automatic Retransmission reQuest (ARQ) data block reception apparatus and method in a communication system is provided. In the ARQ method, an ARQ feedback Information Element (IE) is transmitted to an ARQ data block transmission apparatus. The ARQ feedback IE includes a first field for indicating a Connection IDentifier (CID) of an ARQ connection, a second field for indicating the presence/absence of an additional ARQ feedback IE after the ARQ feedback IE, a third field for indicating a type of an Acknowledgement (ACK) MAP included in the ARQ feedback IE, a fourth field for indicating a Block Sequence Number (BSN) of an ARQ data block, and m ACK MAP fields. The m ACK MAP fields each include information indicating presence/absence of an additional ACK MAP field after a corresponding ACK MAP field, and an ACK MAP indicating success/failure in normal reception for each of n ARQ data blocks, wherein m and n each denote an integer greater than or equal to 1.Type: ApplicationFiled: September 30, 2008Publication date: April 9, 2009Applicant: SAMSUNG ELECTRONICS CO. LTD.Inventors: Jae-Young KIM, Young-Bin CHANG, Won-Il LEE, Sung-Tak JANG
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Patent number: 7475322Abstract: In a keyboard-video-mouse (“KVM”) system in which a target computer may be wirelessly accessed by a plurality of remote stations, a method includes, by the target computer: obtaining a frame of video data; transmitting packets for the frame; transmitting a query packet; obtaining a list of requests from at least one of the remote stations, each request from a particular remote station identifying packets missed by that particular remote station; and resending at least some of the requested packets.Type: GrantFiled: September 23, 2004Date of Patent: January 6, 2009Assignee: Avocent Huntsville CorporationInventors: Iain Huntly-Playle, C. David Covington, Charles Lally, Sheng Li, Richard L. Moore
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Patent number: 7461312Abstract: A Multiple Input Shift Register (MISR) is used to generate signatures, based on data from a device under test, in order to validate the proper sequence and content of the data over a defined period of time. The MISR described herein includes the ability to “tag” the signatures for each time period using an incrementing value, and make that tag and the signature readable by a test controller. The MISR has the flexibility to be reset to a known initial state (or otherwise load a seed value) at the beginning of each time period or to continue accumulating signatures without being reset (or using the seed value). Accumulation of signatures over an extended period of time allows a test controller to validate that no errors occurred during a long term test without having to closely monitor the intermediate results.Type: GrantFiled: July 22, 2004Date of Patent: December 2, 2008Assignee: Microsoft CorporationInventors: John A. Tardif, Stephen Z. Au, Eiko Junus
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Patent number: 7450511Abstract: A method for polling a protocol data unit (PDU) of a Radio link control (RLC), including the steps of selecting a data unit in a buffer, transmitting a selected PDU and polling bit to a receiver when it is a polling period, receiving a status signal from the receiver corresponding to the polling bit and varying the polling period when the status signal is received more than a predetermined number of times spanning a number of transmission time period, can prevent waste of wireless resources and delay of data transmission by adaptively varying the radio access capability of a terminal according to the status of the wireless environment. The status signal is an Acknowledge (ACK) signal or a Negative acknowledge (NACK) signal, and if the ACK signal is received more than a predetermined number of times, the polling period is increased and if the NACK signal is received more than a predetermined number of times, the polling period is decreased.Type: GrantFiled: April 9, 2003Date of Patent: November 11, 2008Assignee: LG Electronics Inc.Inventor: Sung-Kyung Jang
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Publication number: 20080276148Abstract: The present invention relates to a method for transmitting data packets from a mobile terminal to a base station using a hybrid automatic repeat request protocol and soft combining of received data. Further, the present invention provides a base station and a mo-bile terminal both configured to perform the respective method steps. Moreover, a communication system is provided which comprises at least one base station and at least one mobile terminal. In order to decrease the interference caused by retransmissions, the present invention suggests the use of separated channels for initial transmissions and their retransmissions. In order to decrease the interference caused by retransmissions, the present invention suggests the use of separated channels for initial transmissions and their retransmissions.Type: ApplicationFiled: March 10, 2005Publication date: November 6, 2008Applicant: Matsushita Electrick Industrial CO., LTD.Inventors: Joachim Lohr, Eiko Seidel, Dragan Petrovic
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Patent number: 7447968Abstract: Disclosed is an apparatus and method for supporting automatic repeat request (ARQ) in a high-speed wireless packet data communication system. A mobile station receives control information including a subpacket identifier (SP_ID) representing the sequence of a subpacket, the size of an encoder packet (EP_SIZE), and a sequence identifier (AI_SN) that is toggled each time a new encoder packet is transmitted, while receiving one of a plurality of subpackets generated by segmenting a bit stream acquired by encoding a transmission encoder packet. The mobile station determines whether it will perform a decoding process caused by initial transmission or a decoding process caused by retransmission on the received subpacket, based on the control information.Type: GrantFiled: April 24, 2003Date of Patent: November 4, 2008Assignee: Samsung Electronics, Co., Ltd.Inventors: Sang-Hyuck Ha, Min-Goo Kim, Jin-Woo Heo, Young-Kwon Cho, Sang-Min Bae
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Patent number: 7444578Abstract: A data unit sender and method of controlling a data unit sender are presented, in which a time-out monitoring procedure implements a first, longer time-out period (SRTO), and a second, shorter time-out period (QRTO), where a retransmission is executed after the shorter time-out period if the available transmission capacity value for unsent data is greater or equal to the size of a designated data unit that is to be retransmitted as a result of time-out monitoring procedure.Type: GrantFiled: November 18, 2002Date of Patent: October 28, 2008Assignee: Telefonaktiebolaget L M Ericsson (Publ)Inventors: Michael Meyer, Reiner Ludwig, Hannes Ekström
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Publication number: 20080256411Abstract: A base station (103) operates a hybrid retransmission scheme for a communication to a first subscriber unit (101) over a communication channel of an air interface of a cellular communication system. The base station (103) comprises a retransmission parameter controller (209) which sets a transmission parameter, such as a transmit power or an error correcting scheme, for a transmission of the communication in response to an operating point for the retransmission scheme. A CQI processor (203) determines a channel quality indication for the communication channel and a variation processor (205) determines a variation measure of a variation of the channel quality indication. The variation measure can for example be a rate of change. An operating point controller (207) sets the operating point in response to the variation measure. The invention may allow improved setting of transmission parameters for initial transmissions thereby providing higher throughput, reduced resource consumption and reduced delay.Type: ApplicationFiled: November 15, 2006Publication date: October 16, 2008Applicant: MOTOROLA, INC.Inventors: Nick W. Whinnett, David C. Padfield
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Patent number: 7426599Abstract: Application Specific Integrated Circuit (“ASIC”) devices, such as Field Programmable Gate Arrays (“FPGAs”), may be interconnected using serial I/O connections, such as high speed multi-gigabit serial transceiver (“MGT”) connections. For example, serial I/O connections may be employed to interconnect a pair of ASICs to create a high bandwidth, low signal count connection, and in a manner so that any given pair of multiple ASIC devices on a single circuit card may communicate with each other through no more than one serial data communication link connection step. A reconfigurable hardware architecture (“RHA”) may be configured to include a communications infrastructure that uses a high-bandwidth packet router to establish standard communications protocols between multiple interfaces and/or multiple devices that may be present on a single circuit card. Additionally, a communications infrastructure may be established across multiple circuit cards.Type: GrantFiled: September 28, 2006Date of Patent: September 16, 2008Assignee: L-3 Communications Integrated Systems L.P.Inventors: Jerry W. Yancey, Yea Z. Kuo
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Patent number: 7404133Abstract: A method for error detection and correction comprising performing a first modulation error scan of said modulation symbol, marking data that fails to comply with a predetermined criteria, demodulating said modulation symbols, computing a first error syndrome using said demodulated symbols, and correcting errors using said error syndrome computation.Type: GrantFiled: December 15, 2004Date of Patent: July 22, 2008Assignee: Hewlett-Packard Development Company, L.P.Inventors: Paul J. McClellan, Darwin M. Hanks
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Patent number: 7400689Abstract: P/S conversion section 302 performs parallel/serial conversion of data sequences #1 through #4 input in parallel, in accordance with control by assignment control section 303, so that data to a higher-priority communication terminal is assigned to an upper bit in one symbol; M-ary modulation section 304 performs M-ary modulation on the data that has been subject to parallel/serial conversion; S/P conversion section 305 converts a symbol that has been subject to M-ary modulation to parallel form; multipliers 306-1 through 306-4 execute spreading processing on the symbols output in parallel; multiplexing section 309 multiplexes the symbol that has been subject to spreading processing with an assignment notification signal that has been subject to spreading processing; and radio transmitting section 310 transmits the multiplexed signal.Type: GrantFiled: September 22, 2005Date of Patent: July 15, 2008Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Atsushi Matsumoto, Mitsuru Uesugi, Kenichi Miyoshi, Toshiyuki Uehara
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Patent number: 7392452Abstract: A medium access control-high speed (MAC-hs) comprises a hybrid automatic repeat request (H-ARQ) device configured to receive data blocks over a wideband-code division multiple access (W-CDMA) high speed-downlink shared channel (HS-DSCH). The H-ARQ device generates an acknowledgement (ACK) or negative acknowledgement (NACK) for each said data block received. Each received data block having a transmission sequence number. The H-ARQ device receives a new transmission instead of a pending retransmission at any time. At least one reordering device has an input configured to receive an output of the H-ARQ device and the at least one reordering device configured to reorder the received data blocks based on each received data block's transmission sequence number (TSN). Received data blocks are immediately forwarded for processing for higher layers when the received data blocks are received in sequence.Type: GrantFiled: March 1, 2006Date of Patent: June 24, 2008Assignee: InterDigital Technology CorporationInventors: Stephen E. Terry, Nader Bolourchi
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Patent number: 7392451Abstract: A packet data retransmission control method, where a base-station upper-level control system transmits downstream packet data, which is terminated at a terminal station, to a plurality of base stations. A specific base station that is one of the base stations transfers the downstream packet data to the terminal station. The plurality of base stations receive an upstream control signal with which reception of the downstream packet data is acknowledged and which is returned from the terminal station. Base stations other than the specific base station notify the specific base station via the base-station upper-level control system that they have received the upstream control signal. The specific base station determines packet data to be retransmitted according to the receiving situation thereof for the upstream control signal returned from the terminal station and the receiving situations of the other base stations for the upstream control signal.Type: GrantFiled: May 28, 2004Date of Patent: June 24, 2008Assignee: Fujitsu LimitedInventors: Kazuhisa Obuchi, Tetsuya Yano
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Patent number: 7389469Abstract: Data transmission between transmitting/receiving nodes in a bus system may be controlled based on an error check of received data. When an error in the received data is detected, the transmitting node may cease data transmission, and other nodes, which may not have detected the error, may be notified of the detected error.Type: GrantFiled: June 2, 2005Date of Patent: June 17, 2008Assignee: Samsung Electronics Co., Ltd.Inventor: Nam-Hyun Kim