Combining Or Distributing Information Via Time Channels Patents (Class 370/326)
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Patent number: 8055188Abstract: A structure of a data frame for transmitting data via a relay, and a transmission apparatus and a relay using the data frame are provided. The relay includes: a receiver to receive, from a transmission apparatus, first radio resource allocation information with respect to a first radio resource and second radio resource allocation information with respect to a second radio resource, and to receive first data from the transmission apparatus using the first radio resource allocation information; and a transmitter to transmit the received first data to a receiving apparatus using the second radio resource allocation information.Type: GrantFiled: February 22, 2008Date of Patent: November 8, 2011Assignee: Samsung Electronics Co., Ltd.Inventors: Rakesh Taori, Young-Doo Kim, Sung Jin Kim, Mi-Sun Do
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Patent number: 8054844Abstract: The present invention relates to a communication system and method in a ship area network. In a network of a structure including a plurality of shielded regions, communication is performed between terminals provided in the shielded region by using wireless communication, and communication is performed between terminals provided in different shielded regions by further using power line communication, optical communication, or the power line communication and the optical communication in addition to the wireless communication. Therefore, it is possible to obtain advantages of minimizing inconvenience, which is caused by using only wire communication in the related art, and enlarging a working area.Type: GrantFiled: June 27, 2008Date of Patent: November 8, 2011Assignee: Electronics and Telecommunications Research InstituteInventors: Changgyu Lim, Suyoung Bae, Changsik Cho, Dongsun Lim, Hosang Ham
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Patent number: 8040909Abstract: A packet data transmission method of the HSDPA system includes collecting information on the quality of physical channels, a status of the MAC buffer, the priority level of data, the delay of data, and the like, determining the transmission order of data and the size of a data block to be transmitted based on the collected information, and transmitting the data block through the physical layer according to the order of transmissions. Since the HSDPA scheduler takes into account the delay of data, the quality of real-time services can be improved.Type: GrantFiled: October 1, 2009Date of Patent: October 18, 2011Assignee: LG Electronics Inc.Inventors: Seung June Yi, Woon Young Yeo, So Young Lee
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Patent number: 8036165Abstract: The quality of signals during SDMA is raised. In an uplink, a signal processing unit receives signals respectively from a plurality of terminal apparatuses which have been multiple-accessed by division of time. It derives receiving channel characteristics corresponding to the plurality of terminal apparatuses, respectively, for each time slot. In a downlink, the signal processing unit derives transmitting channel characteristics from the receiving channel characteristics derived and, based on the transmitting channel characteristics derived, it transmits signals respectively to the plurality of terminal apparatuses to which SDMA has been performed.Type: GrantFiled: May 16, 2005Date of Patent: October 11, 2011Assignee: Kyocera CorporationInventors: Takeo Miyata, Katsutoshi Kawai
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Patent number: 8027293Abstract: Methods and systems for characterizing requests for individual items of information available from a target address as part of a request for content are provided. The characterization of requests for items of information is applied to select one of a plurality of communication channels for servicing the request. In addition, where different requests for items of information are assigned to different communication channels, those different communication channels can be used to obtain items of information from the target address simultaneously.Type: GrantFiled: July 16, 2007Date of Patent: September 27, 2011Assignee: Cellport Systems, Inc.Inventors: Charles W. Spaur, Mark Aaron Berman, Hiroshi Sakurai, Patrick J. Kennedy
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Patent number: 8027287Abstract: A communication method in a mobile communication system in which an access terminal transmits to an access network DRC information indicating a selected one of forward data rates requested by the access terminal is provided. The access network designates a DRC information length DRCLength indicating a number of slots where the DRC information is repeated and transmits the designated DRC information length to the access terminal. The access terminal gates transmission of DRC information to the access terminal at one time slot in every DRC information length received from the access network.Type: GrantFiled: February 9, 2005Date of Patent: September 27, 2011Assignee: Samsung Electronics Co., LtdInventors: Yu-Suk Yun, Soon-Young Yoon, Hee-Won Kang, Jae-Heung Yeom, Sang-Hyun Yang, Hoon Han
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Patent number: 8018914Abstract: A demodulation section 13 receives a TDMA-TDD based phase-modulated burst signal of mobile communications and demodulates the burst signal by a synchronous detection system (or a quasi-synchronous detection system). The demodulation section 13 includes a frequency deviation compensation section and a carrier recovery section each having a loop filter 14 with three or more stages of time constants. The time constants are switched by a selector switch 15 based on a control signal from a demodulation control section 16. This achieves quick pull-in and jitter after convergence is minimized, thereby allowing highly efficient performance of frequency deviation compensation, etc. that is required for synchronous detection (or quasi-synchronous detection) without increasing the size of circuit.Type: GrantFiled: May 17, 2004Date of Patent: September 13, 2011Assignee: Mitsubishi Electric CorporationInventor: Taisei Suemitsu
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Patent number: 8014325Abstract: In the P-MP wireless data communication via relay stations, a wireless base station forms a communication schedule between the relay station and the relay station and a communication schedule between the relay station and the subscriber station. For each subscriber station (SS), a connected station, an interference at downloading, an interference at uploading, a burst profile between the BS and the SS, and a burst profile between the RS and the SS are registered in an SS management table of the BS. An interference during downloading is generated by allowing each SS to send an identifier of a BS or an RS acting as an interference to a BS to which the SS is connected. An interference during uploading is generated by allowing the BS to capture ranging fixed at the starting time and the like from an SS being under the control of the RS.Type: GrantFiled: December 27, 2006Date of Patent: September 6, 2011Assignee: KDDI CorporationInventors: Haruki Izumikawa, Kenji Saitou, Keizou Sugiyama
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Patent number: 8014365Abstract: A method and a device for transferring signalling information in a TDMA based system. Temporal alignment of values for a retransmission number parameter (R) with the TDMA frame structure is determined on the basis of which a first radio packet to be sent in a number of first TDMA frames is encoded by using a certain first value for the parameter and a second radio packet to be sent in a number of second TDMA frames is encoded by using a certain second value for the parameter. The first and second radio packets are transmitted to the recipient that adheres to the same temporal alignment rules and can thus properly decode both the packets. The solution can be utilized especially in GERAN radio access network with FLO (Flexible Layer One) for transferring signalling information on half-rate channels.Type: GrantFiled: April 19, 2004Date of Patent: September 6, 2011Assignee: Nokia CorporationInventor: Benoist Sébire
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Patent number: 7990942Abstract: Data transmission is performed using the most suitable data rate for the radiation pattern of an antenna. Using an individual pilot channel of a first slot, a base station transmits a pilot signal in a specified direction with a beam pattern having narrow directivity. A wireless terminal located in that direction receives the pilot signal and determines a data rate according to the reception quality of the pilot signal. The wireless terminal transmits to the base station a signal requesting the determined data rate. The base station receives that signal and, based on the requested data rate, transmits data to the wireless terminal with a beam pattern in the same direction as the direction in which the pilot signal was transmitted, using a data channel of a second slot, which occurs a predetermined number of slots after the first slot.Type: GrantFiled: August 23, 2006Date of Patent: August 2, 2011Assignee: Hitachi, Ltd.Inventors: Masanori Taira, Kenzaburo Fujishima
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Patent number: 7974594Abstract: The present invention relates to a method for checking connectivity between a BSC (Base Station Controller) and an MSC (Mobile Switching Center), including: the MSC loopbacking a circuit and sending a connectivity check command to the BSC to instruct the BSC to perform the connectivity check; the BSC performing the connectivity check according to the connectivity check command; if the connectivity check is successful, the BSC sends a Connectivity Check Success identifier to the MSC to instruct the MSC to cancel the self-loop of the circuit; if the connectivity check fails, the BSC sends a Clear Request message to the MSC to release the communication connection and cancel the self-loop of the circuit. Embodiments of the present invention implement quick and convenient locating of connection errors by adding a Connectivity Check command in the messages for A-interface.Type: GrantFiled: October 15, 2007Date of Patent: July 5, 2011Assignee: Huawei Technologies Co., Ltd.Inventor: Jiecheng He
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Patent number: 7969935Abstract: A broadcast channel, such as a broadcast control channel that carries a short message service, in a GSM/EDGE or similar communication system can be extended with additional timeslots. These additional timeslots can be pointed out in a tree structure, the root of which is in the SMS broadcast channel. The extended broadcast channel can be used for broadcast-like services provided under a multimedia broadcast/multicast service.Type: GrantFiled: August 16, 2010Date of Patent: June 28, 2011Assignee: Telefonaktiebolaget L M Ericsson (publ)Inventors: Arne Simonsson, Tor Björn Minde, Peter de Bruin
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Patent number: 7969904Abstract: A packet data transmission method of the HSDPA system includes collecting information on the quality of physical channels, a status of the MAC buffer, the priority level of data, the delay of data, and the like, determining the transmission order of data and the size of a data block to be transmitted based on the collected information, and transmitting the data block through the physical layer according to the order of transmissions. Since the HSDPA scheduler takes into account the delay of data, the quality of real-time services can be improved.Type: GrantFiled: October 1, 2009Date of Patent: June 28, 2011Assignee: LG Electronics Inc.Inventors: Seung June Yi, Woon Young Yeo, So Young Lee
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Patent number: 7965978Abstract: A transmitting/receiving method that can easily detect an influence exerted in transmission channels at a transmitter/receiver is provided. An acquiring unit 12 acquires left audio data and right audio data of audio data received by a metadata calculator 1. An adding unit 141 then calculates added data based on an added value for a predetermined time of a sum of the acquired left audio data and right audio data. Similarly, a subtracting unit 142 calculates subtracted data based on an added value for predetermined time of a difference between the acquired right audio data and left audio data. An addition unit 17 adds the added data and the subtracted data calculated by these adding unit 141 and subtracting unit 142 to the received audio data, and a transmission unit 18 transmits the audio data to which the added data and the subtracted data are added.Type: GrantFiled: February 26, 2008Date of Patent: June 21, 2011Assignee: Sharp Kabushiki KaishaInventor: Osamu Fujii
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Patent number: 7936709Abstract: In a wireless network that includes multiple nodes, each periodic announcement cycle of a communication schedule is partitioned into a set of time slots, including a set of management time slots, a set of beacon time slots, and a set of superframe time slots. Management frames are broadcast during the management slot to specify beacons. Beacons are transmitted during the beacon slots to specify when to transmit the superframes during the superframe time slots.Type: GrantFiled: January 29, 2009Date of Patent: May 3, 2011Assignee: Mitsubishi Electric Research Laboratories, Inc.Inventors: Ghulam Bhatti, Zafer Sahinoglu
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Patent number: 7924804Abstract: A method is described for scheduling a plurality of data flows to a plurality of shared channels in a wireless communication system transmitting data packets in time intervals of frames and applying adaptive modulation and coding. The method comprises the steps of determining virtual link adaptation parameters for at least a part of all combinations of data flow and shared channel, based on state information from the respective shared channel, and based on Quality of Service requirements for the respective data flow; calculating potential data rates for said combinations of data flow and shared channel, based on said virtual link adaptation parameters; calculating priority values for said combinations of data flow and shared channel, based on said potential data rates; and selecting, based on the calculated priority values, for at least a part of the shared channels, a data flow for which data is to be transmitted on each of these shared channel during the time interval of one frame.Type: GrantFiled: June 20, 2006Date of Patent: April 12, 2011Assignee: Panasonic CorporationInventors: Christian Wengerter, Jan Ohlhorst
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Publication number: 20110075602Abstract: A method of extracting automatic identification system (AIS) message segments from AIS signals received by a satellite. The method includes: (a) receiving AIS signals from satellite antennas; (b) generating multiple versions of the AIS signals; (c) extracting message segments contained within each of the AIS signals using one or more AIS receivers; (d) sorting the message segments by time; and (e) deleting any duplicate message segments. Multiple versions of the AIS signals may be generated by one or more of the following methods: (i) processing the AIS signals multiple times, each time with different AIS receiver parameter settings; (ii) splitting each signal into multiple signals and filtering each of the multiple signals separately; (iii) receiving multiple AIS signals and combining them with different phases and amplitudes to produce a plurality of combined AIS signals; and (iv) removing extracted message segments from the received AIS signals and reprocessing the modified AIS signals.Type: ApplicationFiled: September 25, 2009Publication date: March 31, 2011Inventors: Robert Peach, Weiguo Chen
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Publication number: 20110044237Abstract: In a system where satellite communication using multi-beams is performed for each group including a plurality of beams, a required data transmission rate of each beam is detected for each group, more traffic resources are allocated to a beam having a higher required data transmission rate than other beams based on the detection result, and data traffic transmitted to each beam in the group is adaptively controlled.Type: ApplicationFiled: August 23, 2010Publication date: February 24, 2011Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTEInventors: Dae Sub OH, Hee Wook KIM, Do-Seob AHN
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Patent number: 7885239Abstract: An improved mechanism for managing allocation of air interface timeslots for transmission of data to access terminals. When an access terminal requests an access network to transmit data to the access terminal in a first sector, the access terminal will identify within its request a second sector that the access network can optionally use instead. The access network will then determine whether a threshold number of upcoming timeslots in the first sector are already scheduled to carry data to other access terminals and whether at least one of those timeslots is available for use in the second sector. If so, the access network will then responsively transmit the data to the access terminal in the at least one timeslot on the second sector. Advantageously, this process can help to increase sector throughput.Type: GrantFiled: June 12, 2007Date of Patent: February 8, 2011Assignee: Sprint Spectrum L.P.Inventors: Siddarth S. Oroskar, Sachin R. Vargantwar, Manoj Shetty, Ashvini Ganesh G. Canjeevaram
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Patent number: 7864719Abstract: A method of generating a data block including control information in a specific layer of a mobile communication apparatus having a hierarchical structure constructed with a plurality of layers is disclosed. The present invention includes the steps of inserting a control data block including control information into a first region of a lower layer data block if the lower layer has the control information to be transmitted to a receiving side and inserting at least one portion of the data block of an upper layer into a second region of the lower layer data block, wherein the first region is allocated to the control data block before the second region is allocated to the at least one portion of the upper layer data block.Type: GrantFiled: March 29, 2006Date of Patent: January 4, 2011Assignee: LG Electronics Inc.Inventors: Sung Duck Chun, Young Dae Lee, Myung Cheul Jung
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Patent number: 7860045Abstract: Methods and apparatus are presented for scheduling data packet transmissions during optimal channel conditions. In one method, data packet retransmissions are scheduled for transmission during favorable channel conditions when the target remote station is moving slowly, but are scheduled for periodic transmissions when the target is moving moderately or fast. In another method, long delays for retransmissions in a channel sensitive timing scheme are eliminated. In other methods, a combination of periodic and aperiodic retransmissions are used to achieve the desired frame error rate.Type: GrantFiled: October 8, 2004Date of Patent: December 28, 2010Assignee: QUALCOMM IncorporatedInventors: Jack M. Holtzman, Sandip Sarkar, Ahmed Saifuddin
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Patent number: 7860065Abstract: To provide a packet communicating apparatus that can reduce a padding area. A packet communicating apparatus used in a high speed packet communication in a radio mobile communication network includes: an SDU?PDU divider for dividing packet data to be transmitted to an opposite entity, into protocol data units; and a synchronous control signal generator 223 for jointly putting a control signal to change a protocol data unit length, on a padding area of a protocol data unit occurring at a time of the division.Type: GrantFiled: February 3, 2005Date of Patent: December 28, 2010Assignee: Fujitsu LimitedInventors: Shinji Oishi, Tsuneaki Koga, Tatsuhiko Takata, Yuichiro Oishi
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Patent number: 7856211Abstract: Wireless communications transceivers include a transmitter that is configured to selectively frequency shift and transmit portions of broadband information over multiple non-contiguous narrowband frequency bands/segments, each of which is too narrow to carry the broadband information. A receiver also is configured to receive and selectively frequency shift portions of broadband information from multiple non-contiguous narrowband frequency bands/segments, each of which is too narrow to carry the second broadband information. Broadband information thereby may be transmitted and received in a regulated communications environment, even though a given provider may only be assigned discontinuous frequency bands/segments, none of which is wide enough to carry the entire broadband information.Type: GrantFiled: October 10, 2008Date of Patent: December 21, 2010Assignee: ATC Technologies, LLCInventor: Peter D. Karabinis
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Patent number: 7848304Abstract: Multiple transport channels (405, 406, 407) are multiplexed and transmitted in a single physical channel. A code (TFCI) is added to the transport channel data flows to indicate which processing schemes, from a set of available schemes, are being employed and the resultant blocks are interleaved. The depth of the interleaving is set in dependence on the transmission time intervals associated with the schemes in the set of processing schemes.Type: GrantFiled: August 1, 2002Date of Patent: December 7, 2010Assignee: Nokia CorporationInventors: Tommy Kristensen Bysted, Kent Pedersen, Benoist Sebire
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Patent number: 7848272Abstract: A method for conserving resources in a communication system includes entering an awake state from a sleep state at a first time, where the first time occurs a predetermined period prior to a communication event. The predetermined period is greater than or equal to a worst-case determination period for determining a timing offset relative to an access point. An initial timing offset relative to the access point is determined during the predetermined period. The sleep state is entered for a remainder of the predetermined period upon determination of the initial timing offset. The awake state is entered for the communication event. The timing offset relative to the access point is determined based at least in part on the initial timing offset.Type: GrantFiled: November 24, 2008Date of Patent: December 7, 2010Assignee: On-Ramp Wireless, Inc.Inventors: Theodore J. Myers, Lewis N. Cohen, Daniel Thomas Werner, Matthew Hughes, Robert W. Boesel
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Patent number: 7839829Abstract: A method for transmitting radio resources in a mobile communication system is disclosed. The method includes receiving a random access channel (RACH) preamble from a plurality of UEs and transmitting response information associated with the received preambles over a common channel wherein the plurality UEs can access the common channel and receive corresponding information. If a HARQ scheme is used when a UE transmits data to the eNode-B using uplink radio resources allocated over the RACH, the eNode-B does not pre-allocate uplink radio resources required for re-transmission and performs allocation of radio resources for a first transmission of HARQ. If the re-transmission is required, the eNode-B allocates the radio resources required for the re-transmission with the NACK signal. If re-transmission is not required, the present invention can reduce an amount of wasted radio resources.Type: GrantFiled: April 23, 2009Date of Patent: November 23, 2010Assignee: LG Electronics, Inc.Inventors: Young Dae Lee, Sung Duck Chun, Myung Cheul Jung, Sung Jun Park
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Patent number: 7835329Abstract: It is an object of this invention to select an information receiving method at a mobile station (MS) so as to avoid an increase in the transmission power of a base transceiver station (BTS) or redundancy or loss of received information at the mobile station (MS) in broadcast communication or multicast communication. A mobile station according to this invention includes a receiving method selection information acquiring unit (11, 14, 15, 16) for acquiring receiving method selection information for receiving the same information transmitted via a plurality of cells, and a determining unit (12) for determining whether to perform soft combining or selective combining on the same information based on the receiving method selection information.Type: GrantFiled: August 20, 2004Date of Patent: November 16, 2010Assignee: NTT DoCoMo, Inc.Inventors: Sung Uk Moon, Minami Ishii, Takehiro Nakamura
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Patent number: 7826404Abstract: Methods and apparatuses for dynamic error rate management. A wireless station may receive one or more data transfer parameters from another wireless station using a wireless communications protocol. Data may be selected to be transferred between the stations according to the wireless communications protocol based, at least in part, on the one or more data transfer parameters. The one or more data parameters may include a target packet error rate (PER).Type: GrantFiled: November 4, 2005Date of Patent: November 2, 2010Assignee: Intel CorporationInventors: Jose P. Puthenkulam, Muthaiah Venkatachalam
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Patent number: 7826429Abstract: A transmit and receive machine (TRM) is part of a medium access controller (MAC), in support of the 802.11 wireless standard. The TRM is a control machine that changes the MAC within which it resides from a purely software-based MAC into a software and hardware management system. Timing-critical tasks that were once performed by the embedded processor of the MAC are performed by the TRM. This change enables the MAC to operate at a high speed while the TRM maintains high accuracy of transmit and receive timing operations.Type: GrantFiled: June 19, 2007Date of Patent: November 2, 2010Assignee: Intel CorporationInventors: Levi Ronen, Oded Liron
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Patent number: 7817675Abstract: An apparatus and methods for handling emergency message frames (e.g., “911” call frames, etc.) sent by a station in a wireless local-area network are disclosed. The illustrative embodiment increases the probability with which an emergency message frame is accorded the singularly highest quality-of-service by modifying one or more IEEE 802.11e parameters (e.g., back-off contention window length, Arbitration Inter-Frame Space [AIFS], etc.) for a station or access point that transmits an emergency message frame.Type: GrantFiled: February 3, 2004Date of Patent: October 19, 2010Assignee: Avaya Inc.Inventor: Mathilde Benveniste
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Patent number: 7813382Abstract: A method of synchronizing a network includes transmitting a tone signal to convey time information and setting a local time according to the conveyed time information. The method may also include detecting an occurrence of a predefined aspect of the tone signal, and setting a local time based on the occurrence of the predefined aspect of the signal.Type: GrantFiled: September 30, 2005Date of Patent: October 12, 2010Assignee: Robert Bosch GmbHInventors: Arati Manjeshwar, Lakshmi Venkatraman, Bhaskar Srinivasan
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Patent number: 7783248Abstract: A method and apparatus for connecting a primary uplink site and a diverse uplink site includes a satellite and a communication line that couples the primary uplink site and the diverse uplink site. The primary uplink site receives television signals and communicates the signals over the communication line using a video-over-internet protocol. The primary site forms primary uplink signals and selectively communicates the primary uplink signals to the satellite. The diverse uplink site receives the television signals from the primary uplink site through the communication line and forms the diverse uplink signals and selectively communicates the diverse uplink signals to the satellite.Type: GrantFiled: September 29, 2006Date of Patent: August 24, 2010Assignee: The DIRECTV Group, Inc.Inventors: Cecilia C. Comeaux, Wayne Ladrach, Benjamin Mui, Hanno Basse
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Patent number: 7782831Abstract: A method for dynamically implementing a TDMA management cycle for a wireless network is described. The method includes communicating between nodes in the wireless network using a time division multiple access structure, the time division multiple access structure including time divisions having time frames, each time frame having a plurality of time slots, the plurality of time slots including TDMA management slots. The method further includes defining a node partition, the node partition including all of the nodes within the wireless network that are able to route messages to each other, defining a TDMA management cycle, the TDMA management cycle configured to include a TDMA management slot assigned to every node within the partition, storing, at each node, an assignment of the node to a TDMA management slot number, and dynamically adapting the size of the TDMA management cycle based on the number of active nodes in the partition, wherein the size of the TDMA management cycle is a multiple of a base cycle.Type: GrantFiled: September 16, 2005Date of Patent: August 24, 2010Assignee: Rockwell Collins, Inc.Inventor: Michael S. Feeney
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Patent number: 7773552Abstract: A mobile communication system includes a home agent which transfers a communication packet to a mobile communication device connected to a foreign network, an address management section which manages a plurality of IP addresses, an address generation section which assigns any of the IP addresses managed, by the address management section to the mobile communication device as a home address thereof, a server which stores the home address of the mobile communication device and specific information of the mobile communication device in association with each other, and a source node which connects with the server through a network, and transmits the communication packet to any mobile communication device having the home addresses stored in the server as a destination.Type: GrantFiled: March 9, 2006Date of Patent: August 10, 2010Assignee: Yokogawa Electric CorporationInventor: Masaaki Yonezawa
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Inter-station transmission method, radio base station monitoring method, and device using the method
Patent number: 7773568Abstract: A inter-station transmission method of extending time allocated for a transmission path delay of an inter-station transmission path within a predetermined turnaround time, and increasing an inter-station transmission distance. A radio base station reproduces a clock synchronized with a BSU transmission clock DCLK used when transmitting downlink transmission data from a communication control station. The radio base station processes the downlink transmission data. The clock synchronization eliminates a necessity of data format conversion between the communication control station and the radio base station, a buffer accumulating transmission data in preparation for the conversion is not necessary. This reduces a turnaround time of a mobile communication system.Type: GrantFiled: December 9, 2004Date of Patent: August 10, 2010Assignee: Panasonic CorporationInventors: Hidetoshi Yamasaki, Hitoshi Takai -
Publication number: 20100195565Abstract: An apparatus is capable of restoring a clock of a second node in a communication system with a symmetric network construction of a first node that is capable of receiving a Global Positioning System (GPS) signal, and the second node that is not capable of receiving a GPS signal. The method includes identifying synchronization information received from the first node, determining a delay with the first node, generating a clock using the synchronization information and delay, removing a clock phase being out of a reference range in a phase identification interval, dividing the phase identification interval into at least two subdivision intervals, and removing a clock phase being out of a normal operation range of a phase in each subdivision interval.Type: ApplicationFiled: February 1, 2010Publication date: August 5, 2010Applicant: Samsung Electronics Co., Ltd.Inventors: Seung-Woo Shin, Ki-Hyun Kim
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Publication number: 20100195564Abstract: An approach facilitates synchronization by providing: (i) a method to analyze the two-satellite synchronization problem in time-frequency domain; and (ii) a two-stage estimation method to accomplish timing and frequency synchronization. The embodiment facilitates satellite diversity. The embodiment applies to a system involving two or more geosynchronous satellites.Type: ApplicationFiled: November 25, 2009Publication date: August 5, 2010Inventors: Je-Hong Jong, Jun Xu, Anthony Noerpel, Chanasandra Ravishankar
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Patent number: 7768989Abstract: The present invention protocol offers guaranteed Quality of Service (QoS) for concurrent calls in a highly dynamic, scalable network. The invention employs a TDMA reservation technique to transmit voice traffic to multiple destinations and a CSMA/CA contention scheme to support data traffic. The present invention operates over a link-state based routing protocol that reliably floods routing and resource reservation information to network nodes. The present invention is suitable for general networking applications that require QoS for multimedia traffic in a mobile, Ad-Hoc network and enables conference calls to be established and operated in that type of network under various conditions. Moreover, the present invention capitalizes on certain properties of a radio, such as a RAKE type receiver, that sums up multiple, identical transmissions from multiple sources. In addition, the present invention enables roaming between and/or within a group or island of network nodes during the lifetime of a call.Type: GrantFiled: March 4, 2005Date of Patent: August 3, 2010Assignee: ITT Manufacturing Enterprises, Inc.Inventors: Annita Nerses, Robert M. Wetstein
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Patent number: 7756072Abstract: A system and method to passively monitor multicast control traffic in the provider backbone. A monitoring station is located within the service provider network. Upon creation of an MVPN session, this monitoring station joins the default multicast distribution tree (“MDT”) in the provider backbone used to handle traffic within that MVPN session, and receives the customer's multicast control traffic encapsulated in packets addressed to the default MDT. Using these two kinds of packets, the monitor learns the following information: the identity of the PE routers participating in the MVPN; the identity of the customer multicast groups that are carried on each provider multicast data tree (MDT); the identity of one or more PE routers participating in each customer group, and the identity of the MDT that it is carried on. This information is collected for each customer multicast group, both upstream and downstream at each PE router.Type: GrantFiled: December 30, 2005Date of Patent: July 13, 2010Assignee: AT&T Intellectual Property II, L.P.Inventors: William Fenner, Fragkiskos Papadopoulos
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Patent number: 7751376Abstract: In a network system including base stations accommodated in a mobile phone network through an IP network, when a mobile phone terminal as a calling terminal makes a calling request and the calling request from the calling terminal is sent through a source base station to the mobile phone network and then from the mobile phone network through a destination base station to a mobile phone terminal as a called terminal, it is judged whether the source base station and the destination base station are both connected to the mobile phone network through the same IP network, and when the source base station and the destination base station are both connected to the mobile phone network through the same IP network, a data transmission path is established between the calling terminal and the called terminal that directly connects the source base station and the destination base station through the same IP network and without via the mobile phone network.Type: GrantFiled: March 22, 2005Date of Patent: July 6, 2010Assignee: Fujitsu LimitedInventors: Masanori Hashimoto, Yasuo Tezuka, Akio Yaba, Kayo Motohashi
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Patent number: 7746817Abstract: A transmission timing control apparatus included in a network node constituting a telecommunications system is configured to use the reception timing of a timing signal from another node to determine the transmission timing of a timing signal of the own node and determine a time slot for transmission of a data signal in accordance with the transmission timing and the reception timing of a timing signal from the other node. A response timing signal transmitter transmits a response timing signal when received the timing signal from the other node. A transmission timing control circuit uses the reception timing of the timing signal and that of the response timing signal to determine the timing at which the own node transmits the timing signal.Type: GrantFiled: January 30, 2006Date of Patent: June 29, 2010Assignee: Oki Electric Industry Co., Ltd.Inventors: Toshihiko Matsunaga, Masaaki Date, Kosuke Sekiyama, Yuki Kubo
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Patent number: 7742962Abstract: A client device coalesces data received from an exchange, and provides a client application such as a graphical user interface with the opportunity to process fewer, but up-to-date, data updates from an exchange when a large volume of prices becomes available. Accordingly, the trader can be assured of receiving updated information that are fed to the client applications at a rate that is cohesive with that client device's processing speed.Type: GrantFiled: May 2, 2006Date of Patent: June 22, 2010Assignee: Trading Technologies International Inc.Inventor: Scott F. Singer
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Patent number: 7734250Abstract: The method for operating a radio communications system, which provides for the routing of data of connections via subscriber stations, which occasionally perform the function of routing nodes, provides that one of the subscriber stations indicates, to a routing unit of the radio communications system, its readiness to take on the function of a routing node.Type: GrantFiled: June 2, 2005Date of Patent: June 8, 2010Assignee: Nokia Siemens Networks GmbH & Co. KGInventor: Volker Sommer
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Patent number: 7706747Abstract: A method and apparatus for broadcasting in a satellite communication system includes uplinking first uplink signals using a primary site, determining a switchover event and determining a primary site switch time. The primary site switch timer is determined along with a diverse site switch timer that is after the primary switch time. The uplink signal is discontinued from the primary site and the uplinking second uplink signals from the diverse site.Type: GrantFiled: September 29, 2006Date of Patent: April 27, 2010Assignee: The DIRECTV Group, Inc.Inventors: Michael Anthony (Tony) Rossell, Paul Christenson, Cecilia C. Comeaux, Salvador A. Lozano, Wayne Ladrach
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Patent number: 7701893Abstract: An acknowledged MBMS service in which a procedure for providing retransmissions of incorrectly received data blocks is performed, together with an outer coding of the data blocks to be transmitted to the MBMS MSs. A sequence of data blocks carrying information related to the MBMS service is encoded at a BSS (Base Station Sub-system) of the mobile network by an outer coding unit. After the outer coding, the resulting data block sequence is sent to the MBMS MSs. If a data block of the outer coded sequence is badly received by a number of MBMS MSs, corresponding negative acknowledgements (nacks) are sent by such MSs to the BSS. The MSs also notify the BSS, with a positive acknowledgement, if they succeed in outer code decoding the sequence of the MBMS carrying information data blocks, in spite of possible badly received data blocks.Type: GrantFiled: May 10, 2004Date of Patent: April 20, 2010Assignee: Telecom Italia S.p.A.Inventors: Davide Sorbara, Enrico Zucca
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Publication number: 20100085908Abstract: Methods, systems, and devices are described for synchronization in mesh satellite communications. The arrival time of the gateway signal may be used to set a start of receive frame time for a terminal. A received control signal from the gateway may then be used to set a start of transmit frame time for the user terminal. The distance between the satellite and the gateway may change. Ephemeris data, various collections of terminal measurements, or terminal sync bursts may be used to modify start of transmit frame or start of receive frame settings for the terminal or gateway.Type: ApplicationFiled: October 6, 2009Publication date: April 8, 2010Applicant: ViaSat, Inc.Inventor: Anil Agarwal
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Publication number: 20100085909Abstract: Methods, systems, and devices are described for synchronization in mesh satellite communications. The arrival time of the gateway signal may be used to set a start of receive frame time for a terminal. A received control signal from the gateway may then be used to set a start of transmit frame time for the user terminal. The distance between the satellite and the gateway may change. Ephemeris data, various collections of terminal measurements, or terminal sync bursts may be used to modify start of transmit frame or start of receive frame settings for the terminal or gateway.Type: ApplicationFiled: October 6, 2009Publication date: April 8, 2010Applicant: ViaSat, Inc.Inventor: Anil Agarwal
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Publication number: 20100039985Abstract: An apparatus and method for acquiring reliable frame synchronization performance and frequency synchronization simultaneously in a communication system includes a differential correlator outputting a result value obtained by performing a differential operation based on an input signal having symbol timing synchronization and a value pre-defined with a sender sending the input signal, a frequency error calculator compensating for a frequency error based on the result value of the differential correlator and a frequency compensation control signal, and a frame synchronization determiner outputting the frequency compensation control signal if the result value of the differential correlator is greater than a threshold set having at least one value. By introducing a correlation scheme, i.e.Type: ApplicationFiled: December 3, 2007Publication date: February 18, 2010Inventors: Pan-Soo Kim, Dae-Ig Jang, Deock-Gil Oh, Ho-Jin Lee
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Patent number: 7664090Abstract: Provided are methods and apparatuses to encode portions of user data with corresponding spreading sequences within a frame wherein the user data is associated with a single user.Type: GrantFiled: August 11, 2005Date of Patent: February 16, 2010Assignee: IPWireless, Inc.Inventors: Nicholas William Anderson, Vishakan Ponnampalam
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Patent number: 7649858Abstract: A method is disclosed for multiplexing a plurality of data flows onto a radio channel, as is a wireless communication system that operates in accordance with the method. The method includes steps of (a) segmenting data packets of a first data flow into radio blocks; b) in response to a required transmission of data packets of a second data flow, signaling in a first field a change in data flows; (c) signaling in a second field an identity of the second data flow; and (d) segmenting data packets of the second data flow into radio blocks and transmitting the radio blocks of the second data flow. The method further includes steps of (e) changing back to transmitting the first data flow; and (f) continuing the transmission of an incompletely transmitted packet of the first data flow.Type: GrantFiled: March 14, 2001Date of Patent: January 19, 2010Assignee: Nokia CorporationInventor: Jussi Sipola