Patents Examined by Feben Micael Haile
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Patent number: 8059659Abstract: A communication system includes a plurality of devices, such as cable modems, in communication with a station, such as a cable modem termination system, that provides efficient upstream bandwidth sharing.Type: GrantFiled: January 18, 2007Date of Patent: November 15, 2011Assignee: AT&T Intellectual Property II, L.P.Inventors: Gagan Lal Choudhury, Arunabha Guha, Wai Sum Lai, William G. Lester, Moshe Segal
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Patent number: 7391779Abstract: A combined CDM/TDM (code division multiplexing/time division multiplexing) transmitter and method are provided which employ fractional slot assignment by assigning fractional CDM channel gains to multiple slots for at least one packet with a goal that a sum of fractional CDM gains assigned each packet over a scheduling period meet a required threshold. In some embodiments, the transmitter is adapted to determine which users to transmit during a given slot, and to determine fractional CDM channel gains using an optimization of fractional CDM channel gain and user assignment which maximizes a number of users each of which is assigned a respective group of one or more slots with fractional CDM channel gains which sum to the required threshold for the user.Type: GrantFiled: June 26, 2002Date of Patent: June 24, 2008Assignee: Nortel Networks LimitedInventors: Sung K. Park, Hong Ren, Ning Guo
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Patent number: 7385976Abstract: A method selectively acknowledges data packets in a network including a multiple stations connected by a common wireless channel. A transmitting station requests a block acknowledgement from a receiving station. The transmitting station transmits a block of data packets to the receiving station. The receiving station determines a number of successfully received data packets and a number of incorrectly received packets. Then, the receiving station selectively acknowledges only the successfully received data packets if the number of usefully received data packets is less than the number of incorrectly received data packets, and otherwise acknowledging only the incorrectly received packets.Type: GrantFiled: August 12, 2004Date of Patent: June 10, 2008Assignee: Mitsubishi Electric Research Laboratories, Inc.Inventors: Daqing Gu, Zhifeng Tao, Jinyun Zhang
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Patent number: 7342932Abstract: A packet transmission system includes a home agent providing a home link and a home address to a mobile node, one or more access routers, each providing a foreign link and a c/o address to the mobile node, and one or more mobility support routers that relay a packet to the destination between the mobile node and the home agent or a counterpart correspondent node. When the mobile node moves into a new foreign link, the corresponding access router transmits a registration request to the home agent and/or the correspondent node. When acquiring a registration request on the way to the destination, each mobility support router stores an entry having the home address of the mobile node and the c/o address contained in the registration request, and produces and transmits a new registration request updating the c/o address to its own address.Type: GrantFiled: August 12, 2002Date of Patent: March 11, 2008Assignee: NTT DoCoMo, Inc.Inventors: Koji Omae, Takehiro Ikeda, Ichiro Okajima, Narumi Umeda
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Patent number: 7339901Abstract: A process for controlling a switched full-duplex Ethernet type communication network including at least one source subscriber equipment and at least one destination subscriber equipment connected to each other through at least one physical link through at least one switch and at least one virtual link, which is the conceptual representation of a link from a source equipment to at least one destination equipment. In the process each equipment transmitting Ethernet frames segregates between virtual links and allocates a passband for each virtual link and multiplexes virtual links on the physical link output from this equipment. Each transmitted frame has a field that identifies the virtual link to which it belongs.Type: GrantFiled: November 21, 2003Date of Patent: March 4, 2008Assignee: Airbus France S.A.S.Inventors: Jean-Francois Saint Etienne, Juan Lopez, Dominique Portes, Eddie Gambardella, Bruno Pasquier, Philippe Almeida
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Patent number: 7339898Abstract: Disclosed is a method of setting a data transmission rate capable of setting data transmission rate of a data packet received from an upper node in mobile communication system based on a wireless environment and retransmission rate. The preferred embodiment provides not only a method to check data flow to optimize the method of assigning and withdrawing wireless channels assigned to the mobile station, but also a method of assigning and withdrawing wireless channels by checking a wireless environment and a data flow at the same time using NAK frame affected by wireless environment. It is thus possible to quickly determine the influence from a wireless environment that frequently varies and to control a data transmission rate while ensuring the mobility of the database.Type: GrantFiled: December 4, 2002Date of Patent: March 4, 2008Assignee: LG Electronics Inc.Inventor: Sang Ho Lee
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Patent number: 7336615Abstract: Testing the liveliness of a data plane of a label switched path (LSP) using a two stage approach. The first stage may use a general echo request operation that may be implemented using hardware. Therefore, the first stage does not heavily burden the control plane of the LSR. If a suspect LSP passes the first stage of the diagnostic operation, nothing more needs to be done. If, however, the suspect LSP fails the first stage, the diagnostic operation proceeds to a second stage. The second stage of the diagnostic operation sends probing massages through the suspect LSP, but uses the control plane to deliver the acknowledging messages. If the suspect LSP fails the second stage of the diagnostic operation, the ingress LSR can infer that the LSP is down, and begin recovery actions. The probing messages may include padding so that MTU limits can be tested.Type: GrantFiled: June 25, 2002Date of Patent: February 26, 2008Assignee: Juniper Networks, Inc.Inventors: Ping Pan, Nischal Sheth
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Patent number: 7321570Abstract: A communication system is provided that dynamically allocates power to a Multimedia Broadcast/Multicast Service (an MBMS service). In response to determining to establish a Point-to-Multipoint (PTM) communication channel to multiple user equipment (UEs), the communication service assigns the PTM communication channel to the MBMS service, determines a power requirement associated with each user equipment (UE) of the multiple UEs based on a handover quality measurement associated with the UE to produce multiple power requirements, and allocates a power level to the PTM communication channel based on the multiple power requirements. The communication system further dynamically adjusts the allocated power based on a handover quality measurement associated with a UE of the multiple UEs that is received during provision of the MBMS service.Type: GrantFiled: February 3, 2004Date of Patent: January 22, 2008Assignee: Motorola, Inc.Inventors: Rapeepat Ratasuk, Jean-Aicard Fabien, Amitava Ghosh, Weimin Xiao
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Patent number: 7301967Abstract: Method and apparatus for processing time division multiplexed (TDM) signals which may be custom in format. The TDM signal is translated to an intermediate frequency, or externally demodulated, input, and processed. Individual channels of either analog, digital or both are output. Since the configuration of the processor is software controlled, different TDM signals may be processed without reconfiguring hardware.Type: GrantFiled: December 13, 2002Date of Patent: November 27, 2007Assignee: The United States of America as represented by the Secretary of the Air FoeceInventors: Paul B. Losiewicz, Christopher P. Kaiser, Clinton E. Park
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Patent number: 7292568Abstract: A timeslot interchange switch has a three stage pipelined construction. A cross-connect stage identifies egress timeslots for which there is a corresponding data source. The cross connect stage has a set of flags which indicate whether or not there is a data source for each of a plurality of egress timeslots. The cross connect stage takes the flags in groups. If one or more flags in a group indicates an egress timeslot has a corresponding data source then information identifying the egress timeslot is passed to a connection scheduler via a FIFO. The connection scheduler looks up the data source for each the egress timeslot.Type: GrantFiled: June 27, 2002Date of Patent: November 6, 2007Assignee: Alcatel-Lucent Canada Inc.Inventor: Patrick Boily
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Patent number: 7286558Abstract: There are provided a method and device for transmitting/receiving reverse data rate information in a mobile communication system supporting multimedia service applications including voice and data services. According to the present invention, upon receipt of information about the maximum data rate of an SCH, a mobile station determines the minimum number of bits to be assigned to the reverse data rate information according to the number of data rates less than or equal to the maximum data rate and then transmits the reverse data rate information with the minimum number of bits to a base station.Type: GrantFiled: March 29, 2002Date of Patent: October 23, 2007Assignee: Samsung Electronics Co., Ltd.Inventors: Youn-Sun Kim, Ho-Kyu Choi, Hwan-Joon Kwon, Jae-Yoel Kim
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Patent number: 7283536Abstract: A multimode queuing system for DiffServ routers is provided. The multimode buffering and scheduling system that can be adjusted to show either “pure” AF/EF behavior, “pure” DSUI behavior, or a combination of the AF/EF behavior and the DSUI behavior. An operation point parameter may be set to select the desired behavior. DiffServ products utilizing the combination of the behaviors are flexible and more configurable as compared to only AF/EF products. The multimode queuing system deployment is simple and is a low cost modification to DiffServ routers. The same hardware and/or software implementation can support both mechanisms with very small additional cost and effort. Also the management of the system is simplified. For example, there is no need for several parallel queuing systems.Type: GrantFiled: June 11, 2002Date of Patent: October 16, 2007Assignee: Nokia CorporationInventors: Jussi Ruutu, Kalevi Kilkki
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Patent number: 7280566Abstract: In a multi-format transport stream decoder that performs a desired process on first transport streams of different formats to generate a second transport stream, a process request information input unit (APR) is supplied with process target packet data (Pi) and process request information (ScW) indicative of process details. A stream identification information providing unit (TSRi) provides stream identification information (TSID). A packet data retaining and identifying unit (DBA) retains each pieces of first packet data (Pi), and compares the stream identification information (TSIDe) and packet data identification information (PIDe) of the first packet data (Pi) with the process request information (ScW) to determine whether the information is to be processed.Type: GrantFiled: September 10, 2002Date of Patent: October 9, 2007Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Satoshi Okamoto, Shouichi Gotoh, Mikihiko Yamada, Norihiko Mizobata
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Patent number: 7277443Abstract: A digital information distribution system having a plurality of nodes that are connected to one another by counter-rotating data paths. Each node comprises a ring terminal that selects data packets from the data paths for use by the node and passes the remaining data packets to neighboring nodes. The data paths communicate data using asynchronous serial interface packets that transport video data or IP data.Type: GrantFiled: October 22, 2003Date of Patent: October 2, 2007Assignee: Sedna Patent Services, LLCInventors: Christopher W. B. Goode, Yong Ho Son, Steven Zack, Danny Chin
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Patent number: 7272156Abstract: A Phased Transmit Architecture that allows the embedded processor of an IEEE 802.11e wireless communication device to have a significant number of additional cycles between decoding of a QoS frame and the deadlines for generating a response transmission.Type: GrantFiled: June 11, 2002Date of Patent: September 18, 2007Assignee: Texas Instruments IncorporatedInventors: Matthew B. Shoemake, Harshal S. Chhaya, Michele B. Gammel, Khaled Turki
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Patent number: 7227866Abstract: The invention provides a method and system for fast scheduling using a work-conserving Round Robin strategy. The method and system select one of a plurality of queues of data packets for switching it to an output port in a current timeslot, for achieving work-conserving Round Robin scheduling. The method is based on a consideration range for each queue that is a set of queues having priority over the given queue. The method comprises the steps of generating a mask for a given queue for masking all queues outside a consideration range of the given queue and applying the mask and a queue ready flag for the given queue for determining if the given queue is to be selected in the current time slot.Type: GrantFiled: October 21, 2002Date of Patent: June 5, 2007Assignee: Tropic Networks Inc.Inventor: Jeffery David Romanko
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Patent number: 7209493Abstract: A multiplex transmission system according to the invention includes a transmitter and a receiver. The transmitter is provided with an idle frame inserting unit that inserts a specific idle frame different from an idle frame inserted into a surplus band of another signal into a surplus band of a predetermined signal and generates an internal signal, a multiplexing unit that multiplexes internal signals by time division and generates a multiplexed signal and a framing unit that transmits the multiplexed signal to a transmission line interface.Type: GrantFiled: September 18, 2002Date of Patent: April 24, 2007Assignee: NEC CorporationInventor: Hidetoshi Shinoda
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Patent number: 7190684Abstract: The invention relates to packet transmission scheduling and specifically to UMTS packet transmission scheduling. It is an object of the invention to provide an improved method for packet transmission scheduling, especially on downlink shared channels and an improved packet transmission scheduling system, both the improved method and the system especially adapted to be used for UMTS systems. The invention proposes a quality of service scheduling of multiple data flows in a CDMA system, wherein a priority order of protocol data units (PDU) of multiple data flows with regard to predefined flow's quality of service requirements is determined and a serving of the protocol data units (PDU) is performed by dynamically creating transport block sets (TBS) to be transmitted to the physical layer (PHY-layer) with regard to the defined priority order and in dependence of allocated radio resource constraints.Type: GrantFiled: November 1, 2001Date of Patent: March 13, 2007Assignee: Lucent Technologies Inc.Inventors: Qiang Cao, Stefan Gruhl, Jens Mueckenheim
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Patent number: 7177324Abstract: A communication system includes a plurality of devices, such as cable modems, in communication with a station, such as a cable modem termination system, that provides efficient upstream bandwidth sharing.Type: GrantFiled: November 2, 2001Date of Patent: February 13, 2007Assignee: AT&T Corp.Inventors: Gagan Lal Choudhury, Arunabha Guha, Wai Sum Lai, William G. Lester, Moshe Segal
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Patent number: 7170888Abstract: The present invention relates to a call control method between a packet network and Public Switched Telephone Networks (PSTNs) in the next generation network, which enables a terminating media gateway controller to conduct the virtual Continuity (COT) check in processing ISDN User Part (ISUP) calls for the inter-operation of the packet network and the PSTNs. In particular, according to the present invention, for the inter-operation of a packet network and PSTNs, the terminating media gateway controller seizes the trunk at the time when it receives an IAM from an originating media gateway controller and transits the IAM to a terminating PSTN. At this time, the Continuity Check Indicator (CCI) code of Nature of Connection Indicators (NCI) parameter within the IAM is set as ‘Continuity Check Performed on a Previous Circuit.Type: GrantFiled: June 13, 2002Date of Patent: January 30, 2007Assignee: LG-Nortel Co., Ltd.Inventor: Jae En Yoo