Patents Examined by Soon D. Hyun
  • Patent number: 7317732
    Abstract: A method and apparatus for handling data during link suspend pulse and the silent line state of a network device operating in a low power link suspend mode is presented. Accordingly, a new generation of network devices capable of operating in both the full power operational mode of prior art network devices, and a low power “link-suspend” operational mode are presented. The low power “link-suspend” (LS) mode reduces the power consumption of a LAN communications link at the physical layer by eliminating the need to continuously transmit standard idles to maintain link between two linked partners. In the LS mode, a low duty cycle “link-suspend-packet” (LSP) is transmitted between periods of silent line state (SLS). During the SLS, which is a non-data transmission period, the transmitter may be turned off to conserve power therefore preventing the receiver from immediately knowing the phase of an incoming data.
    Type: Grant
    Filed: October 2, 2002
    Date of Patent: January 8, 2008
    Assignee: Teridian Semiconductor, Corp.
    Inventors: Andrew Mills, Ralph Andersson, Anthony Worsham, Michael Nootbaar, David Rosky, Michael Behrin
  • Patent number: 7315522
    Abstract: An RFID tag population is selected by an interrogator. Each tag of the selected tag population then responds to the interrogator in accordance with a slotted arbitration scheme. According to the slotted arbitration scheme, each tag of the selected tag population picks its own random value from a range of integers indicated by the interrogator. The random value corresponds to a slot. The interrogator may indicate that the range of integers is to be adjusted. Each tag of the selected tag population responds to the interrogator with a random number.
    Type: Grant
    Filed: March 28, 2001
    Date of Patent: January 1, 2008
    Assignee: Micron Technology, Inc.
    Inventor: Clifton W. Wood, Jr.
  • Patent number: 7313092
    Abstract: The present invention is a methodology to prioritize packets based on the conditional probability that given the values of attributes carried by packet, the packet is a legitimate one. We will call this the conditional legitimate probability of a packet from here onward. The conditional probability of each packet is evaluated based on Bayesian estimation technique. This is accomplished by comparing the attributes carried by an incoming packet against the “nominal” distribution of attributes of legitimate packet stream. Since an exact prioritization of packets based on their conditional legitimate probability would require offline, multiple-pass operations, e.g. sorting, we take the following alternative approach to realize an online, one-pass selectively dropping scheme.
    Type: Grant
    Filed: September 30, 2002
    Date of Patent: December 25, 2007
    Assignee: Lucent Technologies Inc.
    Inventors: Wing Cheong Lau, Yinglu Zhang
  • Patent number: 7310307
    Abstract: A method for authenticating an element in a network environment is provided that includes receiving a request for one or more triplets. One or more of the triplets may be associated with an authentication communications protocol that may be executed in order to facilitate a communication session. The method further includes returning one or more of the triplets in response to the request and initiating the communication session in response to the triplets after proper authentication of an entity associated with the request.
    Type: Grant
    Filed: December 17, 2002
    Date of Patent: December 18, 2007
    Assignee: Cisco Technology, Inc.
    Inventors: Amitava Das, Michael A. Wright, Joseph A. Salowey, William C. Gossman
  • Patent number: 7310303
    Abstract: Disclosed herein is a ranging method for a mobile communication system based on an OFDMA (Orthogonal Frequency Division Multiple Access) scheme. In the communication system for classifying a ranging procedure between a transmission side and reception sides into an initial ranging process, a bandwidth request ranging process, and a periodic ranging process, the ranging method includes the steps of determining the number of initial RCs(ranging codes) for the initial ranging process, the number of bandwidth request RCs for the bandwidth request ranging process, and the number of periodic RCs for the periodic ranging process, determining a backoff value of the periodic RCs according to the number of the periodic RCs, and sending the initial RCs, the bandwidth request RCs, the periodic RCs, and the backoff value of the periodic RCs to the reception sides.
    Type: Grant
    Filed: April 14, 2003
    Date of Patent: December 18, 2007
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Chang-Hoi Koo, Dong-Seek Park, Pan-Yuh Joo
  • Patent number: 7307951
    Abstract: A method (and apparatus) for determining, in a system including an m-bit time counter, whether an event-occurrence time lies after a predetermined timeout-value, includes reading out of a time-stamp memory a stored time-stamp value, determining the time-difference between the time-stamp value and the event-occurrence time, and determining whether the time-difference is larger than the predetermined timeout-value. The event-occurrence time is represented by a subset of the bits of the m-bit time counter, the subset being determined by a plurality of parameters including any two of a lower bit-position, an upper bit-position, and a subset width. The lower bit-position is dependent on the predetermined timeout-value.
    Type: Grant
    Filed: April 17, 2003
    Date of Patent: December 11, 2007
    Assignee: International Business Machines Corporation
    Inventors: Gero Dittmann, Andreas Herkersdorf
  • Patent number: 7307990
    Abstract: A service provider's routers (PE1, P1, P2, PE2) provide connections between and share routing information with routers (CE1, CE2) of a customer virtual private network (VPN) as well as routers of other customers' VPNs, which may have overlapping address spaces. A service provider's edge router (PE1) informed by the customer's router (CE1) that it will forward packets to a given prefix notifies the other edge router (PE2) that PE1 can forward packets to that address prefix if the destination is in the VPN to which CE1 belongs. PE1 also tells PE2 to tag any thus-destined packets with a particular tag T3. PE2 stores this information in a forwarding information base that it separately keeps for that VPN so that when PE2 receives from a router CE2 in the same VPN a packet whose destination address has that prefix, it tags the packet as requested. But PE2 also tags it with a tag T2 that the router P2 to which PE2 first sends it has asked PE2 to apply to packets to be sent to PE1.
    Type: Grant
    Filed: September 19, 2002
    Date of Patent: December 11, 2007
    Assignee: Cisco Technology, Inc.
    Inventors: Eric C. Rosen, Yakov Rekhter
  • Patent number: 7307969
    Abstract: A method and system for performing a handoff between different CDMA systems in a mobile communication network having first and second cells and a gateway cell is disclosed. The handoff between the first and second cells is performed using a gateway, wherein one frequency is used by the first cell and a first sector of the gateway, and a second frequency is used by the second cell and a second sector of the gateway. The system and method allow for performing a handoff of a call between two different communication systems having two different communication standards, such as between a CDMA 2G system and a CDMA 3G system, and further allows for the handoff to be performed without dropping the call.
    Type: Grant
    Filed: September 28, 2001
    Date of Patent: December 11, 2007
    Assignee: LG Electronics, Inc.
    Inventor: Yeong Jong Shin
  • Patent number: 7304941
    Abstract: A switchover system and method is described. The invention preferably operates in a data packet switching system for transmitting through a switching arrangement data packets that comprise at least a data packet identifier. The switching arrangement comprises at least an active switch card associated to a backup switch card. And the active switch card and the backup switch card receive simultaneously at least a data packet and transmit it to a network adapter device. The switchover system comprises active and backup means for respectively storing at an active and backup data packet address the transmitted at least data packet. It also comprises switchover detecting means coupled to the active and backup storing means for detecting a switchover event, and control means coupled to the active and backup storing means and to the switchover detecting means for setting the backup storing means when a switchover event is detected.
    Type: Grant
    Filed: April 11, 2003
    Date of Patent: December 4, 2007
    Assignee: International Business Machines Corporation
    Inventors: Alain Benayoun, Patrick Michel, Gilles Toubol
  • Patent number: 7301899
    Abstract: A method and apparatus for preventing a Denial of Service attack directed at a target that is hosted on a server. The attack is detected and the IP address of the source client of the attack is identified. The IP address of the source of the attack is then communicated upstream to router devices close to the attacking source and the attacker is prevented from further attacks until it is determined that the attacker poses no threat. The detection of the attack and the communication of the identity of the attacker to upstream routers is performed automatically or by human intervention.
    Type: Grant
    Filed: January 31, 2001
    Date of Patent: November 27, 2007
    Assignee: Comverse Ltd.
    Inventor: Jonathan S Goldstone
  • Patent number: 7292594
    Abstract: A switching fabric connects input ports to output ports. Each input has an input pointer referencing an output port, and each output has an output pointer referencing an input port. An arbiter includes input and output credit allocators, and an arbitration module (matcher). The input credit allocator resets input credits associated with input/output pairs and updates the input pointers. Similarly, the output credit allocator resets output credits associated with input/output pairs and updates the output pointers. The matcher matches inputs to outputs based on pending requests and available input and output credits. A scheduler schedules transmissions through the cross-bar switch according to the arbiter's matches.
    Type: Grant
    Filed: January 9, 2003
    Date of Patent: November 6, 2007
    Assignee: LSI Corporation
    Inventors: Gopalakrishnan Meempat, Gopalakrishnan Ramamurthy, William J. Dally
  • Patent number: 7292530
    Abstract: Embodiments of a method and apparatus to improve network performance by managing packet fragmentation are described.
    Type: Grant
    Filed: December 29, 2000
    Date of Patent: November 6, 2007
    Assignee: Intel Corporation
    Inventor: Jacob Christensen
  • Patent number: 7289458
    Abstract: A method for transmitting data between a read/write unit (SLG) and one or more mobile data stores (D, HD) in an identification system. The method includes dividing the data transmission occurring between the read/write unit (SLG) and the data stores (D, HD) into a plurality of timeslots (SLOT), subframes (SUBFRAME) and frames. An identification timeslot (S-CH) from the respective data store (D, HD) is received and evaluated in at least one evaluation timeslot (SOa) and the data store is identified as a mobile high-speed data store (HD) if the identification timeslot (S-CH) is a high-speed identification timeslot (S31,0, S0,31), and an associated data-store identifier block (MB2) is evaluated at least beginning during the subsequent timeslot after the identification timeslot (S-CH) onward. The method provides for very rapid detection of high-speed data stores (HD).
    Type: Grant
    Filed: March 31, 2003
    Date of Patent: October 30, 2007
    Assignee: Siemens AG
    Inventors: Janos Gila, Kurt Rauscher
  • Patent number: 7289425
    Abstract: A parallel orthogonal frequency division multiplexed (OFDM) communications system includes a transmitter and receiver, the transmitter having a parallel fast Fourier transform (FFT) module operating in parallel to a conventional inverse fast Fourier transform (IFFT) module for providing respective orthogonal outputs received by the receiver. The receiver has a parallel IFFT module and a conventional FFT module for providing respective orthogonal outputs. The respective orthogonal outputs are combined to form a composite signal that provides improved insensitivity to relative frequency offsets and Doppler frequency offsets. The parallel FFT and IFFT modules in the OFDM communication system provides improved signal diversity and performance in the presence of relative frequency offsets and Doppler frequency offsets, and provides improved tracking capability for the receiver with backward compatibility.
    Type: Grant
    Filed: June 20, 2003
    Date of Patent: October 30, 2007
    Assignee: The Aerospace Corporation
    Inventors: Hen-Geul Yeh, Charles C. Wang
  • Patent number: 7289530
    Abstract: A system and method are provided for coding a frame in a packet communications system using a G.709 Digital Wrapper Frame format. The method comprises: accepting digital information; outer encoding the digital information with a Reed Solomon (RS) encoding scheme; interleaving the outer encoded information; inner encoding the interleaved information using a BCH encoding scheme; and, forming a G.709 Digital Wrapper frame including payload and parity bytes. More specifically, a standard DW superframe is formed with 122,368 bits of payload and 8192 bits of parity. The outer encoding process uses an RS(1023,1007) parent code. In one aspect, 15 groups of RS(781,765) and 1 group of RS(778,762) codewords are formed per superframe. The inner encoding process uses a BCH(2047,1959) parent code. In one aspect, 64 groups of BCH(2040,1952) codewords are formed per superframe.
    Type: Grant
    Filed: April 14, 2003
    Date of Patent: October 30, 2007
    Assignee: Applied Micro Circuits Corporation
    Inventors: Warm Shaw Yuan, Daniel M. Castagnozzi, Alan Michael Sorgi, John Thomas Carr
  • Patent number: 7286516
    Abstract: Methods and systems for WLAN-based signaling network monitoring are disclosed. A signaling message is received at a network routing node. A message copy function on the network routing node copies the signaling message. The message copy function forwards the copied signaling message to a WLAN interface. The WLAN interface transmits the signaling message to an external network monitoring platform via a wireless local area network connection.
    Type: Grant
    Filed: September 10, 2004
    Date of Patent: October 23, 2007
    Assignee: Tekelec
    Inventors: Robert J. Delaney, Todd Eichler
  • Patent number: 7286471
    Abstract: System and method for dynamically altering bandwidth allocation to each region serviced by a network. Each region is allocated an initial estimated bandwidth on the network and compares instantaneous demand against the allocation. When demand falls below the allocation, the region releases bandwidth so other regions can take advantage of that bandwidth. When demand exceeds the allocation, the region takes advantage of bandwidth released by other regions.
    Type: Grant
    Filed: March 23, 2002
    Date of Patent: October 23, 2007
    Assignee: Mindspeed Technologies, Inc.
    Inventors: Axel K. Kloth, Warner Andrews, Paul Bergantino, Jeremy Bicknell, Daniel Fu, Moshe De-Leon, Stephen M. Mills
  • Patent number: 7280547
    Abstract: A method and system for automatically detecting a wide area network (WAN) communication connection to a selected one of a plurality of substantially equivalent communication ports. An initiation event, such as a link detect or a power on event, is detected for the selected port. An attempt is then made to access the WAN through the selected port. For example, an Internet connection request may be sent through the selected port. If a response is received through the selected port, the response is evaluated to determine if the attempt to access the WAN was successful. If the attempt was successful, the selected port is set as the WAN communication connection. Otherwise, the selected port is set as a local area network communication connection. Preferably, the dynamic WAN port detection is performed by a network device, such as a gateway, or by a computer in communication with a network device.
    Type: Grant
    Filed: December 16, 2002
    Date of Patent: October 9, 2007
    Assignee: Microsoft Corporation
    Inventors: Lord Nigel Featherston, Dennis M. Lee, Thomas W. Getzinger
  • Patent number: 7280519
    Abstract: Disclosed is a scalable, hybrid mobile network termed the Metropolitan Area Mobile Network (MAMN) based on a new dynamic mobile network protocol-DynaMo. DynaMo supports TCP/IP based communication between nodes, whether they are moving or stationary. DynaMo is a location-based routing technique that integrates MAMN, with wired TCP/IP networks (such as the Internet). Through the disclosed use of a modified Domain Name Services (DNS), communication between wired and wireless nodes, moving or stationary, is supported and is transparent to the end-user. DynaMo supports the use of multiple channels and implements a scheme for channel reuse. A hybrid encryption mechanism, based on public/private key pairs enables signed and secure communication.
    Type: Grant
    Filed: January 7, 2003
    Date of Patent: October 9, 2007
    Inventor: Darrell Harvey Shane
  • Patent number: 7269172
    Abstract: A method and device for managing a data buffer that stores packets for transmission. Packets are loaded into the data buffer, which is managed as a first-in-first-out (FIFO) circular queue, at the tail of the queue. Three sequence numbers index a pointer array addressing the buffer. These sequence numbers correspond to the tail of the queue, the point in the queue from which the next packet is to be transmitted and the head of the queue, corresponding to the last packet acknowledged as correctly received plus one. When a packet is negatively acknowledged, the sequence number corresponding to the next packet to be transmitted is reset to the head of the queue.
    Type: Grant
    Filed: January 7, 2003
    Date of Patent: September 11, 2007
    Assignee: Sun Microsystems, Inc.
    Inventor: Hugh R. Kurth