Patents Examined by Steven Nguyen
  • Patent number: 6965568
    Abstract: An adaptive communication system utilises opportunistic peak-mode transmissions to transmit data between originating and destination stations, via one or more intermediate stations. Each station monitors the activity of other stations in the network, storing connectivity information for use in subsequent transmissions. Each station also sends out probe signals from time to time, to establish which other stations are in range. Messages are then sent across the network from station to station, with confirmation data being transmitted back to the originating station, until the destination station is reached. Old messages, which would otherwise clog the network, are timed out and deleted. A communication network and transceiver apparatus for use in the network are also disclosed.
    Type: Grant
    Filed: May 15, 2000
    Date of Patent: November 15, 2005
    Inventor: Mark Sievert Larsen
  • Patent number: 6965584
    Abstract: A method and system for dynamic forward assignment of IP addresses in a wireless network wherein a serving base station requests IP addresses of it neighboring cells. The serving base station then provides the requested IP addresses to the mobile stations it serves based on whether the mobile station will be entering a particular neighboring cell. Immediately upon entering the neighboring cell the mobile station establishes over the air communications with the neighboring cell's base station using one of the requested addresses. In another embodiment of the present invention each mobile unit is responsible for attaining IP addresses from the base stations of neighboring cells. Accordingly, the base stations serve as relay points for the IP address requests from the mobile unit to an address server.
    Type: Grant
    Filed: February 27, 2001
    Date of Patent: November 15, 2005
    Assignees: Telcordia Technologies, Inc., Toshiba America Research, Inc.
    Inventors: Prathima Agrawal, Toshikazu Kodama, Faramak Vakil, Tao Zhang
  • Patent number: 6963581
    Abstract: A method and apparatus for adaptive service interworking include processing that begins by obtaining connection information of a receiving end-point network switch in response to receiving a setup message from a sending party. The setup message identifies a receiving party, which is operably coupled to the receiving end-point switch. Such connection information may be obtained by sending an enhanced traffic descriptor appended to the setup message and receiving an enhanced traffic descriptor that was appended to a connection message from the receiving end-point switch. The connection information is then interpreted to determine whether the receiving end-point switch is capable of supporting a transparent link. If the end-point network switch is capable of supporting the transparent link, the transparent link is established and utilized to transport data between the sending and receiving parties.
    Type: Grant
    Filed: November 28, 1998
    Date of Patent: November 8, 2005
    Assignee: Alcatel Canada Inc.
    Inventors: Michael Prince, Ken W. Young, Maged E. Shaker, Katherine Chan
  • Patent number: 6963570
    Abstract: An apparatus for compressing the header of ATM cells in order to provide greater bandwidth includes means for discriminating cells/packets (1310), means for detecting header (1320), means for compressing header (1330), means for combining compressed header with payload (1350), means for discriminating compressed header cell/packet (1710), means for detecting header in compressed header and separating header from payload (1720), means for decompressing header (1730), and means for combining decompressed header with payload (1740) to form cell/packets.
    Type: Grant
    Filed: July 15, 1998
    Date of Patent: November 8, 2005
    Assignee: Comsat Corporation
    Inventor: Anil K. Agarwal
  • Patent number: 6961326
    Abstract: A method for transmitting data in a mobile communication system. The method comprising segmenting a data stream into at least one consecutive frame having a variable data length, the data stream being segmented into a plurality of consecutive blocks having a variable data length, each said consecutive block being segmented into a plurality of sub-consecutive blocks having a byte length; attaching, at each head of the consecutive frames, a header including a first set of bits indicating the sequence number of a consecutive block corresponding to the head and a second set of bits indicating the sequence number of a sub-consecutive block corresponding to the head; and transmitting the header-attached consecutive frames.
    Type: Grant
    Filed: May 30, 2000
    Date of Patent: November 1, 2005
    Assignee: Samsung Electronics Co., Ltd
    Inventors: Hoon Chang, Hyun-Seok Lee, Dae-Gyun Kim, Chang-Hoi Koo
  • Patent number: 6961329
    Abstract: Techniques to forward unsolicited messages from an (IS-2000) CDMA radio network via an HDR radio network to an access terminal. A session is first established between the access terminal and the HDR radio network. During session establishment or thereafter, the access terminal indicates to the HDR radio network an interest in receiving unsolicited messages from the CDMA radio network, and may further indicates an interest to be paged for a particular set of service options. The access terminal typically also registers with the CDMA radio network. Thereafter, unsolicited messages can be sent from a mobile station controller (MSC) to the HDR and CDMA radio networks, or sent from the MSC to the CDMA radio network, which then forwards the messages to the HDR radio network. The HDR radio network encapsulates the unsolicited messages and sends the encapsulated messages on a forward traffic channel, a designated control channel cycle, or via other channels to the access terminal.
    Type: Grant
    Filed: June 13, 2000
    Date of Patent: November 1, 2005
    Assignee: Qualcomm Incorporated
    Inventors: Paul E. Bender, Ramin Rezaiifar
  • Patent number: 6961320
    Abstract: A method, system, and software product for transmitting TTY/TDD signals in a system employing low bit-rate voice compression are disclosed. The method includes receiving an input signal and generating a teletypewriter (TTY) indicator signal from the input signal. Whether or not the input signal is a TTY signal including a TTY character, is determined based on the TTY indicator signal. A TTY packet including the TTY character of the TTY signal is constructed and transmitted if the input signal is determined to be a TTY signal. A method, system, and software product for receiving and decoding TTY/TDD signal is also disclosed.
    Type: Grant
    Filed: September 26, 2000
    Date of Patent: November 1, 2005
    Assignee: Hughes Electronics Corporation
    Inventors: Kumar Swaminathan, Udaya Bhaskar
  • Patent number: 6959008
    Abstract: A method and apparatus for alignment of TDM-based signals for packet transmission using framed and unframed operations are described. In an embodiment, a line card in a network element includes a deframer unit that receives a Time Division Multiplexing (TDM) signal. The TDM signal includes a payload and overhead data. The deframer generates frame alignment data based on the overhead data. The line card also includes a packet engine unit coupled to the deframer unit. The packet engine unit receives the payload, the overhead data and the frame alignment data and generates a number of packet engine packets. The packet engine packets represent a frame within the TDM signal such that the packet engine packets include the payload, the overhead data and the frame alignment data. Additionally, the line card includes packet processor coupled to the deframer unit. The packet processor receives the packet engine packets and generates network packets based on the packet engine packets.
    Type: Grant
    Filed: April 17, 2001
    Date of Patent: October 25, 2005
    Assignee: Redback Networks Inc.
    Inventors: Michael McClary, Sharath Narahari, David R. Stiles
  • Patent number: 6954439
    Abstract: The objective of the invention is to increase the potential hop density of single frequency TDD radio links by allowing a set of closely located terminals to use a single channel. This is possible when transmission and reception periods of the terminals are synchronized so that the transmit period of any of the terminals in a terminal group does not overlap with the receive period of any of the terminals in the group. Synchronization is achieved by selecting at least one terminal in a hub site as a super master terminal. This terminal gives timing through a common bus to the rest of the terminals in the group. These terminals use the received timing for adjusting their own timing i.e. for adjusting the starting moment and ending moment of the transmission and reception periods in such a manner that none of terminals is sending a burst while another terminal is receiving.
    Type: Grant
    Filed: March 26, 2001
    Date of Patent: October 11, 2005
    Assignee: Nokia Corporation
    Inventors: Otto Pulkkinen, Jarmo Mäkinen, Lauri Kuru
  • Patent number: 6954436
    Abstract: A method for electing a master router in a virtual router network by obtaining a tracking parameter for each of the routers participating in a virtual router network. A priority value is assigned to each of the plurality of routers based on the tracking parameter and reported to each router at periodic intervals. The router with the highest priority value is elected, or re-elected, as the new master.
    Type: Grant
    Filed: February 28, 2001
    Date of Patent: October 11, 2005
    Assignee: Extreme Networks, Inc.
    Inventors: Michael Yip, Apoorva Bhatt
  • Patent number: 6954435
    Abstract: The method includes transmitting a quality-of-service (QoS) route request to discover routing based upon a QoS parameter, and the route request including a flow identifier and a QoS link metric. Furthermore, the method includes each intermediate node determining whether the node can support the requested QoS parameter and, if so, updating the QoS link metric, forwarding the QoS route request, and temporarily reserving node resources. The destination node, upon receiving the QoS route request, generates a reply including the flow identifier and updated QoS link metric for each discovered route, and the source node generates QoS route metrics based upon updated QoS link metrics in the replies. Also, the source node selects a route to the destination node based upon the QoS route metrics, and transmits route confirmations to intermediate nodes on the selected route.
    Type: Grant
    Filed: April 29, 2002
    Date of Patent: October 11, 2005
    Assignee: Harris Corporation
    Inventors: Tom Billhartz, Joseph Bibb Cain
  • Patent number: 6952404
    Abstract: A communication control system and method comprising, in one embodiment, a master station connected to a slave station using two redundant buses, wherein command frames having the same content are sent out to the buses and the communication process is changed depending on whether or not the contents of the command frames, when received by the receiving station, are identical.
    Type: Grant
    Filed: November 4, 2002
    Date of Patent: October 4, 2005
    Assignee: Yokogawa Electric Corporation
    Inventors: Shunsuke Hayashi, Hideo Matsukawa, Toyoaki Yokoi
  • Patent number: 6952417
    Abstract: A system and method selectively establishes data communications, such as XDSL services, between data devices and a network switch. Status of the data devices are monitored and active data devices are connected to a data branch for data communications. Data devices which are inactive may remain connected to the data branch, if available, or may be switched to a pilot branch. While disconnected from the pilot branch, the system may detect a signal from the data device indicating that the device is going active. If pilot signals are being used, the pilot signals between a data device and the network switch are monitored to determine when the data device is going active. Once detected, the data device is connected to the data branch. Alternately, if pilot signals are not being used, the system monitors the connection with the data device for any signals, such as a wake-up signal, which indicates that the data device is going active.
    Type: Grant
    Filed: March 13, 2000
    Date of Patent: October 4, 2005
    Assignee: Lucent Technologies Inc.
    Inventor: Carl Robert Posthuma
  • Patent number: 6952434
    Abstract: A system and method for processing control cells to prevent event missequencing and data loss are described. At least one control unit is processed to retrieve communication information related to data received along one or more communication links in a network. The at least one control unit is then stored in one or buffers. Finally, the at least one control unit is further processed to retrieve link information related to the one or more communication links.
    Type: Grant
    Filed: December 27, 2000
    Date of Patent: October 4, 2005
    Assignee: Cisco Technology, Inc.
    Inventors: Manjunath Jagannatharao, Raja Rangarajan, Sajunair Madhavan Nair, Rajagopalan Kothandaraman
  • Patent number: 6950404
    Abstract: A duty cycle management system and method for use in a wireless device having a transmitter which transmits packets in the form of individual packets and/or packet bursts. A controller in combination with an instruction set limits the number of packets transmitted during each time period defined by one time window or adjacent time windows, on a sliding basis, so as to limit the duty cycle of transmissions during successive adjacent time windows to the predetermined duty cycle limit. To do so transmission of packets is delayed as needed to establish sufficient idle period(s) during the one or adjacent time window(s) to maintain the duty cycle within the duty cycle limit.
    Type: Grant
    Filed: May 14, 2001
    Date of Patent: September 27, 2005
    Assignee: DataRadio Inc.
    Inventor: Norman Pearl
  • Patent number: 6950393
    Abstract: A packet transfer apparatus for a network system is disclosed. The apparatus comprises a packet receiver that accepts an input of packets from a first network segment, a packet classifier that classifies packets based on their respective process flows, a packet discarder to discard packets and a packet sender that sends packets to a second network segment. Another aspect of the invention is a network system comprising a plurality of terminal nodes, at least one packet transfer unit effectively connected between at least two of said terminal nodes, said at least one transfer unit further comprising a packet classifier that classifies packets into their respective process flows.
    Type: Grant
    Filed: November 22, 2000
    Date of Patent: September 27, 2005
    Assignee: P-Cube, Ltd.
    Inventors: Michael Ben Nun, Reuven A Marko
  • Patent number: 6950398
    Abstract: A transport scheme is provided based on Internet protocol (IP) and multiprotocol label switching (MPLS) technology for third generation (3G) radio access networks (RAN). Label switched paths are established and managed for interconnecting base stations and radio network controllers. The process incorporates constraint-based routing and Diffserv to provide transport bearers that can support bandwidth provisioning and a variety of QoS requirements in the RAN.
    Type: Grant
    Filed: August 22, 2001
    Date of Patent: September 27, 2005
    Assignee: Nokia, Inc.
    Inventors: Yile Guo, Zoe Antoniou, Sudhir Dixit
  • Patent number: 6950421
    Abstract: An integrated microcellular communication system and a CDMA communication system having signal advancing capabilities wherein a signal is advanced to compensated for the time delay induced by communication signal travel over a fiber optic connections between a base station cellsite and a remote microcell.
    Type: Grant
    Filed: December 13, 2001
    Date of Patent: September 27, 2005
    Assignee: SBC Knowledge Ventures, L.P.
    Inventors: Brian Douglas Fiut, Timothy Jason Joyce
  • Patent number: 6950417
    Abstract: An apparatus for detecting forward and reverse link imbalances in a digital cellular communication system is provided. An indication of maximum access probes is used to determine whether a link imbalance caused a reverse link failure to occur. The maximum access probes condition indicates that a wireless unit has attempted to access a base station a pre-defined maximum number of times. An indication of a lost paging channel and a traffic channel initialization (TCI) time out is used to determine whether a link imbalance caused a forward link failure to occur. If the wireless unit did not lose the paging channel, the apparatus determines whether a TCI time out occurred. If the wireless unit lost the paging channel, or it did not lose the paging channel but a TCI time out occurred, the apparatus determines the cause for the forward link failure.
    Type: Grant
    Filed: November 7, 2003
    Date of Patent: September 27, 2005
    Assignee: Qualcom, Incorporated
    Inventor: Samir S. Soliman
  • Patent number: 6947377
    Abstract: A path network and a path network operation method capable of dealing with an abrupt traffic variation by realizing fast path bandwidth increase are disclosed. A path network is operated by transmitting path signals from a transmitting node to a receiving node through the working paths and the protection paths, and converting a protection path into a working path temporarily in order to increase a bandwidth of the working paths when a bandwidth increase request occurs in the path network. The transmitting node and the receiving node can convert a protection path into a working path by using the automatic path conversion information contained in the path overhead attached to the path signals.
    Type: Grant
    Filed: October 28, 2000
    Date of Patent: September 20, 2005
    Assignee: Nippon Telegraph and Telephone Corporation
    Inventors: Katsuhiro Shimano, Satoru Okamoto, Atsushi Watanabe