Patents Examined by Duc Ho
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Patent number: 7233566Abstract: In a 5×3 wavelet transform apparatus, a function-A module (11) calculates equations A1 and A2, a function-B module (12) calculates equations B1 and B2, function-C0 module (13) calculates an equation C0, and a function-C1 module (14) calculates an equation C1. Selectors have terminals thereof set to “1” for a forward transform, and to “0” for an inverse transform. The equations A1 and B1 are applied for reversible transform, and A2 and B2 are applied for irreversible transform. The aforementioned equations are as follows: Aout=RoundOff {(Ain0+Ain1+0×2000)>>2}. A1 Aout=0.25*(Ain0+Ain1). A2 Bout=RoundOff(Bin0+Bin1). B1 Bout=0.5*(Bin0+Bin1). B2 C0out=C0in0+C1in1. C0 C1out=C0in0?C1in1. C1.Type: GrantFiled: February 26, 2003Date of Patent: June 19, 2007Assignee: Sony CorporationInventors: Keigo Hashirano, Seigo Fukushima
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Patent number: 7230951Abstract: A foreign agent routes data packets according to policy based routing information maintained by the home network. The policy may be network based or may be subscriber profile based as defined in an authentication, authorization, and accounting server. The policy routes data packets according to one of an address specified in the mobile IP header and an application type. The address specified in the mobile IP header is typically within a range of addresses within the home network. The foreign agent routes data packets of the specified policy type directly to the home agent server. Data packets that are not of the specified policy type are routed directly to an Internet access point.Type: GrantFiled: April 16, 2003Date of Patent: June 12, 2007Assignee: Nortel Networks LimitedInventors: Jerry Mizell, David J Lauson, Peter Wenzel
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Patent number: 7224697Abstract: The present invention is directed to a dynamic channel selector for use with a wireless local area network and a method of selecting a channel therein. In one embodiment, the dynamic channel selector includes a channel quality subsystem that monitors a signal quality of a signal traversing a first channel of the wireless local area network and a noise level of the first channel. The dynamic channel selector also includes an interference mitigation subsystem, coupled to the channel quality subsystem, that selects a second channel of the wireless local area network as a function of the signal quality of the signal traversing the first channel and the noise level of the first channel.Type: GrantFiled: November 4, 2002Date of Patent: May 29, 2007Assignee: Agere Systems Inc.Inventors: Raja Banerjea, Yuan Jiang
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Patent number: 7224695Abstract: In a router and a communication network system reserving network resources in compliance with an RSVP (Resource ReSerVation Protocol), that is a protocol for resource reservation, a router stores an encapsulated destination address associated with an address of a second host upon encapsulating and transferring a packet addressed to the second host, transfers a first path message transmitted from a first host to make a resource reservation in compliance with a resource reservation protocol, obtains thereafter the encapsulated destination address from the address of the second host, and transmits a second path message in a non-capsulated state to make a resource reservation with the same communication quality as that of the first path message to the encapsulated destination address.Type: GrantFiled: January 30, 2002Date of Patent: May 29, 2007Assignee: Fujitsu LimitedInventors: Hideaki Ono, Kazuyuki Oka
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Patent number: 7221676Abstract: A router is disclosed for supporting local-level communication between separate subnets managed by different subnet managers. The router preferably makes one or more end nodes from one subnet “visible” to the subnet manager of another subnet. The end nodes may consequently be identified by one local identifier (LID) value in one subnet, but by another LID value in a different subnet. In a preferred embodiment, the router accepts from a first subnet local IB packets directed to end nodes made visible from a second subnet, and processes the local IB packet to convert the first subnet LID values for destination and source end nodes to second subnet LID values for these end nodes.Type: GrantFiled: July 30, 2002Date of Patent: May 22, 2007Assignee: Brocade Communications Systems, Inc.Inventors: Howard Green, Brian Forbes, Lino Costantino
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Patent number: 7218642Abstract: Provided herein are methods and systems for a digital subscriber line protocol that does not require amplitude modulation, as well as methods and systems for such a protocol that can be used in combination with amplitude-modulation techniques to provide superior broadband DSL capabilities.Type: GrantFiled: April 30, 2002Date of Patent: May 15, 2007Assignee: Binj Technologies, IncInventors: Jules Insler, Barry Nadler
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Patent number: 7215672Abstract: A linked list buffer circuit can be configured to store different linked lists. The buffer includes insert logic and an insert state machine to add ATM cells to the linked lists in the buffer. Extract logic and an extract state machine allow for the removal of ATM cells from the linked lists in the buffer. Because, ATM cells can have different levels of priority, programmable monitor circuitry is provided to monitor the linked lists in the buffer. The monitor circuitry keeps track of buffer and list capacity, and also keeps track of cell loss priority and delay priority cells of the buffer and the linked lists. This information is used to drop received cells if necessary. The linked list monitor circuitry can be configured based upon the linked list configuration of the buffer. The linked list monitor can be configured by changing threshold levels provided to counter/comparator circuitry. Assignments of internal counter circuitry are also programmable based upon the buffer configuration.Type: GrantFiled: March 13, 2001Date of Patent: May 8, 2007Inventors: Koby Reshef, Yochai Parchak, Amir Cohen, David Shyken
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Patent number: 7212537Abstract: A wireless network gateway for transmitting data between a wireless network and a packet data network. The wireless network gateway comprises: 1) N input-output processors for transmitting and receiving data packets to and from the wireless network and the packet data network; 2) M service processors for performing packet data serving node (PDSN) functions associated with data sessions between the packet data network and mobile stations communicating with the wireless network; 3) a switch fabric for the N input-output processors and the M service processors; and 4) P switch modules. Each of the P switch modules transfers data packets between the switch fabric and at least one input-output processors. A first switch module stores session bindings information associated with a first data session between a first mobile station and the packet data network.Type: GrantFiled: July 10, 2002Date of Patent: May 1, 2007Assignee: Samsung Electronics Co., Ltd.Inventors: Jack C. Wybenga, Pradeep Samudra
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Patent number: 7212513Abstract: A wireless network device, such as a printer, to enter an infrastructure-type user wireless LAN as a station, has an additional access point function. A printer having an ESS-ID ‘MM’ as an initial setting is connected with a user wireless LAN, which includes an access point and a personal computer and uses a common ESS-ID ‘XX’. In this case, the procedure changes the ESS-ID set in the personal computer to ‘MM’ to establish an infrastructure-type communication with the printer. This arrangement enables the ESS-ID set in the printer to be changed to the common ESS-ID ‘XX’ for the user wireless LAN without varying the ESS-ID set in the access point. The technique of the invention ensures easy connection of any device without sufficient input interfaces to the wireless LAN.Type: GrantFiled: October 31, 2002Date of Patent: May 1, 2007Assignee: Seiko Epson CorporationInventors: Kazuhito Gassho, Susumu Shiohara
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Patent number: 7209452Abstract: Systems and methods for obtaining logical layer information in a frame relay and/or asynchronous transfer mode (ATM) network are described. In an exemplary embodiment, a physical layer test system, such as an integrated testing and analysis system, communicates with a broadband network management system, which in turn communicates with an element management system for a frame relay and/or ATM network.Type: GrantFiled: December 13, 2002Date of Patent: April 24, 2007Assignee: BellSouth Intellectual Property CorporationInventors: William Scott Taylor, David E. Massengill
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Patent number: 7209480Abstract: A base station serves as a relay node between a mobile terminal and an application server on a backbone network. The base receives a radio packet from the mobile terminal through a wireless I/F section, and transfers the radio packet to a IP processing section, a TCP input section and a protocol relay section successively in this order. At this point, with respect to the packet, the IP header is processed and then removed in the IP processing section, the TCP header is processed and then removed in a TCP processing section, and the data is transferred to a protocol relay section along with the TCP segment information described in both headers. The protocol relay section has a conversion table, and performs proxy processing based on the table.Type: GrantFiled: November 13, 2001Date of Patent: April 24, 2007Assignee: Matsushita Electric Industrial Co., Ltd.Inventor: Shinkichi Ikeda
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Patent number: 7206314Abstract: A system and method for providing transparent communications between an Infiniband (IB) network and a Fibre Channel (FC) network are disclosed. One method comprises: (a) detecting FC node ports in the FC network; (b) creating virtual IB targets for each FC node port in the FC network; and (c) converting IB packets directed to the virtual IB targets into FC frames directed to the corresponding FC node port. It may further comprise intercepting management packets directed to the virtual IB targets and responsively emulating a subnet management agent (SMA) of the addressed virtual IB target. Another method comprises: (a) detecting IB channel adapters; (b) creating a virtual FC target for each IB channel adapter; and (c) converting any FC frames directed to the virtual FC targets into IB packets directed to the corresponding IB channel adapter. Fabric frames directed to the virtual FC targets may be intercepted and handled appropriately.Type: GrantFiled: July 30, 2002Date of Patent: April 17, 2007Assignee: Brocade Communications Systems, Inc.Inventors: Feejen Liao, Dennis Makishima, Howard Green, Brian Forbes, Daniel Chung
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Patent number: 7203181Abstract: A hermetian of a system response matrix is to be determined. Spreading codes, channel specific multipliers and channel impulse responses are provided. The channel code specific multipliers have real and imaginary values. Channel codes being a combination of a real spreading code, a complex scrambling code and a sign of the channel code specific multiplier. Real and imaginary components of an approximate hermetian of the system response matrix are determined. The channel code specific multipliers are applied to the real and imaginary components of a result of the convolutions to derive the hermetian of the system response matrix.Type: GrantFiled: October 3, 2002Date of Patent: April 10, 2007Assignee: InterDigital Technology CorporationInventors: Chayil S. Trimmerman, Ryan Samuel Buchert
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Patent number: 7203159Abstract: A back-up channel line card-installed ESF framing mechanism independently sources an FDL signaling channel for the transport of protection switch signaling information, taking advantage of the fact that DSL multiplexer equipment is capable of accepting and processing ESF framed digital data, including embedded FDL-based signaling information. Upon completion of transport of the FDL-based signaling information, the back-up channel is used for data transport in place of a faulty channel.Type: GrantFiled: June 11, 2002Date of Patent: April 10, 2007Assignee: Adtran, Inc.Inventors: Dennis B. McMahan, Bradley D. Tidwell
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Patent number: 7200158Abstract: A device that recognizes the time synchronization packet and substitutes a real-time value from the master internal counter into the proper place in a data packet is placed between an Ethernet Media Access Controller (MAC) and a Physical Interface Transceiver (PHY). A second device monitors the packet passing from the MAC to the PHY and determines when it is a time synchronization packet from the time master. Upon recognition of the proper packet, the second device simultaneously captures the master's time value and captures the value of a local real-time clock. The result of these captures are presented to the local host computer which controls the time base clock that increments the local real-time clock to either speed up or slow down this local clock, thereby synchronizing the local clock to the time master clock. The offset and skew of the local clock to the master clock is reduced to only the network latency plus variability due to network congestion.Type: GrantFiled: December 13, 2002Date of Patent: April 3, 2007Assignee: Honeywell InternationalInventor: Jay W. Gustin
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Patent number: 7193983Abstract: A code division multiple access downlink receiver for providing wireless communication via a wireless channel between a base station and a mobile station in which the receiver is implemented. The receiver comprises a plurality of subchannels of which each conveys at least one signal received from the base station, and a cell searcher for receiving signals in the plurality of subchannels and retrieving therefrom a common code relating to a cell.Type: GrantFiled: January 17, 2002Date of Patent: March 20, 2007Assignee: Agency for Science, Technology and ResearchInventors: Ying-Chang Liang, Po Shin Francois Chin
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Patent number: 7193964Abstract: The invention provides a method and apparatus for providing hitless protection switching in a transmission systems which support a standardized implementation of virtual concatenation. A switching apparatus is arranged to receive data signals on at least two transmission paths and to output data from a selected one of said transmission paths. The apparatus is arranged to align the respective received data signals so that a selector mechanism can select between corresponding elements of the received data signals. This arrangement allows hitless switching to be performed since there is no loss or repetition of signal elements when switching occurs. In a preferred embodiment, data in respect of each frame of each data signal is stored and the selector mechanism selects between paths on a frame-by-frame basis by comparing quality information carried by the data signals. This arrangement offers a very low end to end Bit Error Rate (BER) performance.Type: GrantFiled: May 22, 2002Date of Patent: March 20, 2007Assignee: Nortel Networks LimitedInventors: John Courtney, Mark Carson, David Goodman
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Patent number: 7190677Abstract: A method of providing multiple test access for test equipment in a communication network is provided. The method comprises the step of coupling test apparatus to a first communication line via a first communication circuit in the test apparatus wherein the first communication line has a first quantity of equal bandwidth communication pathways that are dedicated for test access. The first communication line is coupled to a first cross connect apparatus. The test apparatus also has a second communication circuit that is coupled to the first communication circuit. The method further comprises the step of utilizing a second communication line having a second quantity of equal bandwidth communication pathways that are dedicated for test access. The second communication line is coupled between the first cross connect apparatus and a second cross connect apparatus. The second quantity is less than the first quantity.Type: GrantFiled: May 1, 2002Date of Patent: March 13, 2007Assignee: BellSouth Intellectual Property CorporationInventor: William S Taylor
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Patent number: 7187696Abstract: Training signals can be chosen based on stored prior connection information to reduce the use of extra tones in transmitted training signals and thereby improve receiver performance. By choosing training signals based on the stored prior connection information, it is possible to make the training signals indirectly a function of the loop impairments. One advantage of this scheme is that we can choose to omit certain tones in the training signals, based on previous connection information, on a loop-by-loop basis. For example, in an ADSL Transceiver Unit-Central office end (ATU-C) device, per-local-loop prior connection information may be employed to select DMT tones to be included in downstream training signals. Similarly, in an ADSL Transceiver Unit-Remote terminal end (ATU-R) device, prior connection information may be employed to select DMT tones to be included in upstream training signals.Type: GrantFiled: May 18, 2005Date of Patent: March 6, 2007Assignee: Broadcom CorporationInventor: Yuanjie Chen
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Patent number: 7187682Abstract: A method and node for supporting PDSN load optimization in a CDMA2000 network. The Packet Core Network Manager calculates network statistics and uses the resulting numbers to set the PPP inactivity timer depending on the load on the PDSN. In a preferred embodiment, the calculation gives the mean value of the durations of the PPP sessions (KPI1), and the corresponding standard deviation (KPI2). The PPP inactivity timer is then set to M*(KPI1+KPI2) during low load, to M*KPI1 during normal load, and to M*(KPI1?KPI2) during heavy load, where 0<M<=1, preferably depending on the distribution of the subscriber inter-arrival time.Type: GrantFiled: June 13, 2002Date of Patent: March 6, 2007Assignee: Telefonaktiebolaget LM Ericsson (publ)Inventors: Said Soulhi, Mahmood Hossain