Patents Examined by Afsar Qureshi
  • Method and system for optimal routing of calls in a base station system
    Patent number: 6958983
    Abstract: A method and system are provided for optimal routing of calls in an Internet Protocol-based Base Station System (IP-based BSS), whereby a plurality of new messages are introduced on the A-interface. One such message informs the BSS that the Circuit Identity Codes (CICs) included in the message can be connected to the BSS to provide optimal routing of one or more calls. Another such message informs the BSS that the CICs included in the message are to be restored as separate CICs on the A-interface. The provision of such messages overcomes the significant disadvantages of the existing and developing BSS implementations.
    Type: Grant
    Filed: December 15, 2000
    Date of Patent: October 25, 2005
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Niilo Musikka, Lars Lindén, Lennart Rinnbäck, Peter Galyas
  • Network switching device with forwarding database tables populated based on use
    Patent number: 6956854
    Abstract: A switching device for forwarding network traffic to a desired destination on a network, such as a telephone or computer network. The switching device includes multiple ports and uses a lookup table containing lookup keys to determine which port to forward network traffic over. The lookup tables are populated based on use. Consequently, the lookup tables on different ports contain different addresses. By storing only addresses that a port uses, each port's lookup table is unique to that port's characteristics. Additionally, aging techniques are used on both source and destination addresses in the lookup table so that stale entries are removed and memory is conserved.
    Type: Grant
    Filed: December 20, 2001
    Date of Patent: October 18, 2005
    Assignee: Alcatel Internetworking (PE), Inc.
    Inventors: Jayasenan Sundara Ganesh, Timothy Scott Michels, Parmajeet Singh, Greg W. Davis
  • Method and apparatus using pseudo-inverses of linear transformations in multi-carrier modulation receivers and transceivers
    Patent number: 6956815
    Abstract: Many communications protocols involve a collection of communication channels collectively forming the dimensions of a finite dimensional vector space, of which at any point in time, only a subset of those channels or dimensions must be received. Messages on these channels are time progressions in at least the actively used dimensions of the vector space which have been linearly transformed to create a sample list transported across at least one physical transport layer to a receiver. The linear transform may further include an estimation of the effects of the transport of the sample list across the one or more physical layers to the receiver. This invention uses at least portions of pseudo-inverses of the linear transform in various ways within receivers and receiver portions of transceivers.
    Type: Grant
    Filed: August 16, 2001
    Date of Patent: October 18, 2005
    Assignee: Proxim Corporation
    Inventor: Alain Chiodini
  • Bandwidth control system
    Patent number: 6954429
    Abstract: A bandwidth control system for a network, the network having a host computer that includes a first network interface and a second network interface. A packet driver adapted to be executed on the host computer is logically connected to the first network interface and the second network interface. The packet driver captures packets received from the network on the first network interface. A traffic shaper adapted to be executed on the host computer maintains a topology representation of the network, the topology representation including one or more nodes. The traffic shaper performs priority and packet rate metering functions on the captured packets to match a set of rate conditions unique to each node in the topology representation of the network. The captured packets are returned to the packet driver for transmission to the network on the second network interface.
    Type: Grant
    Filed: April 4, 2001
    Date of Patent: October 11, 2005
    Assignee: Dyband Corporation
    Inventors: James Horton, Lois Hollopeter, Victor Nunes, Scott Searcy, David Thomas
  • Communication method, system, and apparatus that combines aspects of cyclic prefix and zero padding techniques
    Patent number: 6950387
    Abstract: The present invention provides communication methods, systems, and apparatuses. Methods are provided in which a second signal for transmission is obtained by halving values of an initial portion and a tail portion of a first signal, and adding zeros following the tail portion. Upon or after reception, a third signal is obtained from the received second signal and used in obtaining information. Obtaining each of an initial portion and a tail portion of the third signal includes adding together at least a portion of each of the initial portion and the tail portion of the second signal.
    Type: Grant
    Filed: August 21, 2003
    Date of Patent: September 27, 2005
    Assignee: Wisair Ltd.
    Inventors: Gadi Shor, Sorin Goldenberg
  • Base station controller in IMT-2000 system
    Patent number: 6950412
    Abstract: A base station controller in IMT-2000 system is disclosed. The base station controller includes a local routing unit for interfacing the BTS with the MSC, for processing a call and a No. 7 signal and for providing alarms occurred in the BSC to the BSM; a vocoding unit for vocoding voice data received through the local routing unit; a global routing unit for interfacing among the local router, other local routers and the BSM; and a clock generating unit for clocks necessary for controlling the BTS and the BSM based on time and frequency clocks received from a global positioning system (GPS).
    Type: Grant
    Filed: January 2, 2001
    Date of Patent: September 27, 2005
    Assignee: UTStarcom Inc.
    Inventors: Chae-Moon Lee, Min-Jae Hwang
  • Redundant information processing system
    Patent number: 6940811
    Abstract: A redundant information processing system with sufficient reliability is provided at a moderate cost without any part that could be a single fault point in the system. In the redundant information processing system in which an actuator 5 is controlled based on a signal from a sensor 4, each of processing devices 1A to 1C collects command signals from other processing devices and determines which command signal to be valid according to a logical decision, for example, a majority decision. When the command signals of more than two of the processing devices including the relevant processing device which determines are valid, the command signals are output according to priority while a control information blocking signal is output to a processing device other than those which are valid.
    Type: Grant
    Filed: April 18, 2001
    Date of Patent: September 6, 2005
    Assignees: Ihi Aerospace Co., Ltd., Aeroastro Inc.
    Inventors: Scott A. McDermott, Kinji Mori, Hiroyuki Yashiro
  • System and method for maintaining wireless channels over a reverse link of a CDMA wireless communication system
    Patent number: 6940842
    Abstract: A method for providing wireless communication of digital signals is provided, with the digital signals being communicated between wireless subscriber units and a base station. The digital signals are communicated using at least one radio frequency (RF) channel via Code Division Multiple Access (CDMA) modulated radio signals defined by orthogonal codes. The method includes making available a plurality of orthogonal subchannels within each CDMA RF channel. Available orthogonal subchannels are allocated on an as-needed basis for subscriber units actively sending data. An idling mode connection is provided on a reverse link for subscriber units which are powered on, but not actively sending data, by assigning a shared orthogonal subchannel to at least two different subscriber units, but utilizing different time slots of the shared orthogonal subchannel.
    Type: Grant
    Filed: January 12, 2004
    Date of Patent: September 6, 2005
    Assignee: Tantivy Communications, Inc.
    Inventor: James A. Proctor, Jr.
  • Management of downlink TBF in an EGPRS and in a GPRS mobile station using final block indicator and relative reserved block period field
    Patent number: 6937564
    Abstract: A method is disclosed for receiving a downlink radio link control (RLC) data block with a mobile station, as is a mobile station and a computer program that operate in accordance with the method. The method includes receiving the RLC data block; determining if a final block indicator (FBI) bit is set and, if it is, determining if a Relative Reserved Block Period (RRBP) field is valid, and, if it is not, discarding the received data block. For the case where the mobile station is in an EGPRS TBF mode of operation, and if a retransmitted RLC data block is split into two parts, and if in a first part of the retransmitted RLC data block the FBI is set, and in a second retransmitted part of the RLC data block there is a valid RRBP field, then these data blocks are retained.
    Type: Grant
    Filed: May 30, 2003
    Date of Patent: August 30, 2005
    Assignee: Nokia Corporation
    Inventor: Hannu Juhani Anttila
  • Transmitter apparatus and receiver apparatus and base station making use of orthogonal frequency division multiplexing and spectrum spreading
    Patent number: 6937558
    Abstract: An improved transmitter apparatus, a receiver apparatus and a base station implemented with the transmitter and receiver apparatuses are described. These apparatuses and the base station serves to establish communication by making use of an orthogonal frequency division demultiplexing demodulation and an inverse spectrum spreading demodulation in combination. The communication coverage thereof can be expaned by making use of an orthogonal frequency division demultiplexing demodulation and an inverse spectrum spreading demodulation in combination.
    Type: Grant
    Filed: February 26, 2001
    Date of Patent: August 30, 2005
    Assignee: Kabushiki Kaisha Toshiba
    Inventor: Takashi Wakutsu
  • Loop back testing for multi-protocol hybrid networks
    Patent number: 6937594
    Abstract: A hybrid network (100) includes a plurality of network elements (102, 106, 110, 114) that are coupled together by communication links (116, 118, 120, 122, 124). The network elements operate on different communications protocols. A loop back test message traverses a path (140) across network elements to test the integrity and quality of the path. Each network element that receives the loop back message modifies the message in a predetermined manner. The originator of the message verifies that the message was modified in an appropriate manner and in an appropriate time frame to determine integrity and quality.
    Type: Grant
    Filed: April 27, 2001
    Date of Patent: August 30, 2005
    Assignee: Lucent Technologies Inc.
    Inventors: David B. Smith, George Paul Wilkin
  • Port aggregation load balancing
    Patent number: 6934293
    Abstract: The network switches and computer readable mediums of the present invention allocate port assignments based on load, that is, the amount of data being forwarded through each port in the group. The load balancing of the present invention is preferably dynamic, that is, packets from a given stream may be forwarded on different ports depending upon each port's current utilization. When a new port is selected to transmit a particular packet stream, it is done so that the packets cannot be forwarded out of order. This is preferably accomplished by ensuring passage of a period of time sufficient to allow all packets of a given stream to be forwarded by a port before a different port is allocated to transmit packets of the same stream. The invention may be used in a variety of different network environments and speeds, including 10Base-T, 100Base-T, and Gigabit Ethernet, and other network environments.
    Type: Grant
    Filed: October 10, 2003
    Date of Patent: August 23, 2005
    Assignee: Cisco Technology, Inc.
    Inventors: Gregory L. DeJager, James R. Rivers, David H. Yen, Stewart Findlater, Scott A. Emery
  • Base station which selectively utilizes B and D channels to support a plurality of communications
    Patent number: 6930991
    Abstract: A CDMA wireless digital communication system which supports all types of voice and data communications while utilizing the minimum amount of bandwidth for the particular application. The system efficiently allocates ISDN bandwidth on demand by a subscriber. Upon initialization of the subscriber unit, the system establishes a channel and generates the necessary spreading codes to support the highest capacity channel desired by the subscriber unit. Portions of the communication spectrum bandwidth are not reserved until actually required by the subscriber unit. Since the call setup is performed at the beginning of a call from that subscriber unit, including the assignment of spreading codes, a subscriber unit can quickly gain access to the portion of the spectrum that is required to support the particular application.
    Type: Grant
    Filed: December 20, 2001
    Date of Patent: August 16, 2005
    Assignee: InterDigital Technology Corporation
    Inventor: Fatih M. Ozluturk
  • Control program structure of ATM switching system and method thereof
    Patent number: 6931015
    Abstract: A control program structure and its method are disclosed which is capable of controlling a hardware source of an ATM switching system from an external source through a standard interface. The control program structure of an ATM switching system including: a GSMP master function unit mounted on a processor board existing at an external source of an ATM switching system, for performing a master function of a GSMP (general switch management protocol); a protocol processing function unit mounted on a processor board inside a switching system, for processing a slave function of a GSMP; and a plurality of resource control function units each mounted on processor boards distributed in the switching system, for controlling a hardware resource of the system according to a request message of the protocol processing function unit.
    Type: Grant
    Filed: December 15, 2000
    Date of Patent: August 16, 2005
    Assignee: LG Electronics Inc.
    Inventors: Young-Kung Kim, Sung-Gi Min
  • System and method for controlling signal processing in a voice over packet (VoP) environment
    Patent number: 6928076
    Abstract: One aspect of the invention relates to a messaging communication scheme for controlling, configuring, monitoring and communicating with a signal processor within a Voice Over Packet (VoP) subsystem without knowledge of the specific architecture of the signal processor. The messaging communication scheme may feature the transmission of control messages between a signal processor and a host processor. Each control message comprises a message header portion and a control header portion. The control header portion includes at least a catalog parameter that indicates a selected grouping of control messages and a code parameter that indicates a selected operation of the selected grouping.
    Type: Grant
    Filed: September 21, 2001
    Date of Patent: August 9, 2005
    Assignee: Intel Corporation
    Inventors: Manoj Mehta, Saurin Shah, Dianne Steiger, Chris Lawton, Anurag Bist
  • Bandwidth management apparatus, address resolution assistance apparatus, method for managing bandwidth, and method for assisting address resolution
    Patent number: 6928069
    Abstract: A bandwidth management apparatus determines, when a call whose communication information is to be transmitted as a sequence of datagrams is assigned, a link to be used for transmitting the communication information, judges whether there exists a surplus bandwidth in sections of the determined link, and allocates the call to a bandwidth necessary for transmitting the communication information when the judgement result is true, and informs a node that is involved in call setup for the call about the judgement result. Also disclosed are an address resolution assistance apparatus that cooperates with the bandwidth management apparatus, a band managing method, and an address resolution assisting method which realize the respective apparatuses. In a network to which the invention is applied, good speech quality can be stably maintained irrespective of its configuration and scale.
    Type: Grant
    Filed: August 13, 2001
    Date of Patent: August 9, 2005
    Assignee: Fujitsu Limited
    Inventor: Akira Nakanishi
  • Fast acquisition of traffic channels for a highly variable data rate reverse link of a CDMA wireless communication system
    Patent number: 6928064
    Abstract: A method for monitoring idling mode connections between a base station and idling subscriber units that are powered on, but not actively sending data, is provided. The method includes making available a plurality of orthogonal subchannels within at least one Code Division Multiple Access (CDMA) radio frequency (RF) channel. A shared orthogonal subchannel is assigned to at least two different idling subscriber units, but utilizing different time slots of the shared orthogonal subchannels. For each idling subscriber unit assigned the shared orthogonal subchannel, a respective heartbeat signal is sent within its assigned time slot at a data rate that is low enough to maintain bit synchronization with the base station.
    Type: Grant
    Filed: January 20, 2004
    Date of Patent: August 9, 2005
    Assignee: Tantivy Communications, Inc.
    Inventor: James A. Proctor, Jr.
  • Communications system and communication method for data multiplexing
    Patent number: 6925092
    Abstract: A communication station and communication method for effectively multiplexing data into a combined data stream by adding a special header to the combined data packet. The bit positions of this special header indicate the presence of data packets in a data stream in a combined data packer. The combined data packet is transmitted from the first to the second communication station through a first communication channel. Changes in the data streams can be communicated to the receiving communication station through a second communication channel, so that the second communication station can restore relations between data streams and recreate stripped headers.
    Type: Grant
    Filed: October 12, 2000
    Date of Patent: August 2, 2005
    Assignee: Koninklijke Philips Electronics N.V.
    Inventors: Frank P. Derks, Jeroen G. Van Velden
  • Method and apparatus for collision avoidance in bufferless networks
    Patent number: 6920108
    Abstract: An apparatus for implementing a collision avoidance mechanism in a bufferless network. The apparatus includes first and second inputs for receiving traffic units from first and second source points, respectively. The traffic units from the first source point arrive at the first input on a basis of a first traffic pattern. The traffic units from the second source point arrive at the second input on a basis of a second traffic pattern. The apparatus further includes a traffic detection unit and a notification unit. The traffic detection unit is operative to monitor the traffic units received at the first and second inputs for detecting the first and second traffic patterns. The notification unit is operative to generate a control signal for transmission to either one of the first and second source points on a basis of the detected first and second traffic patterns.
    Type: Grant
    Filed: June 26, 2000
    Date of Patent: July 19, 2005
    Assignee: Nortel Networks Limited
    Inventors: Alan S. Chapman, Jeffrey W. Fitchett
  • Reduced pin gigabit media independent interface
    Patent number: 6920132
    Abstract: A network interface which reduces pin count in an MII or GMII system by logically combining certain signals to eliminate redundancies, thereby enabling one external connection or pin to perform the functions previously performed by multiple pins. In particular, the two connections previously used for TX_EN and TX_ER are reduced to a single TX_CTRL connection. Similarly, the three connections for RX_DV, CRS and RX_ER are reduced to a single RX_CTRL connection. The COL connection is also eliminated.
    Type: Grant
    Filed: May 30, 2000
    Date of Patent: July 19, 2005
    Assignee: Marvell International Ltd.
    Inventor: William Lo