Patents Issued in September 14, 2004
  • Patent number: 6791926
    Abstract: If data is recorded using a disc with deviating characteristics and a recorder with deviating characteristics, data will not be appropriately recorded, and errors will occur in the read signal. Standard recording pulse parameters specifying recording pulse positions for plural possible mark length and space length combinations are read from a writable optical disc, these standard recording pulse parameters are then used for test writing, the standard recording pulse parameters are changed uniformly or individually, a best recording pulse parameter is thus obtained, and jitter can be reduced.
    Type: Grant
    Filed: June 29, 2000
    Date of Patent: September 14, 2004
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Shigeru Furumiya, Junichi Minamino, Mamoru Shoji
  • Patent number: 6791927
    Abstract: An optical head has an initial setting for a tilt angle of an objective lens with respect to an optical disk. If a different optical disk having a different transparent layer is used for recording/reproducing data thereon, the lens actuator changes the tilt angle of the objective lens to an optimum tilt angle with respect to the different optical disk, or a optical correction device optically compensates the wave front aberration.
    Type: Grant
    Filed: June 13, 2002
    Date of Patent: September 14, 2004
    Assignee: NEC Corporation
    Inventor: Yutaka Yamanaka
  • Patent number: 6791928
    Abstract: A method for formatting an optic disk by an optic disk drive is disclosed. The optic disk drive includes a control unit having operation keys. The method includes the steps of (a) initiating a formatting operation; (b) setting the optic disk drive to a busy condition; (c) checking if the optic disk is a blank CD-RW disk and going to step (g) if the optic disk is a blank CD-RW disk otherwise going to step (d); (d) checking if the optic disk is a UDF disk and issuing a warning and ending the operation if the optic disk is not a UDF disk otherwise going to step (e); (e) performing a quick formatting operation and writing label in UDF file system of the formatted optic disk; (f) Ending the formatting operation; (g) performing a complete formatting operation and writing label in the UDF file system of the formatted optic disk; and (h) ending the formatting operation. No computer is needed in performing the optic disk formatting operation.
    Type: Grant
    Filed: March 14, 2002
    Date of Patent: September 14, 2004
    Assignee: Behavior Tech Computer Corporation
    Inventors: Steel Su, Toon Jeow Foo
  • Patent number: 6791930
    Abstract: The present invention is aimed at providing an optical disk, an optical disk device, and an optical disk reproduction method, for allowing for stable and efficient reading of address information. The optical disk includes a plurality of tracks each divided into a plurality of recording sectors. Each of the recording sectors includes a header region. The header region includes address information for identifying the position of the corresponding recording sector and address synchronous information for identifying the recording position of the address information for bit synchronization. The address information has been modulated using a run length limit code of a maximum inversion interval of Tmax bits (Tmax is a natural number), and the address synchronous information includes two patterns of which inversion interval is (Tmax+3) bits or more, so that the reproduced signal of the address synchronous information is distinguished from the reproduced signal of other information.
    Type: Grant
    Filed: January 22, 2003
    Date of Patent: September 14, 2004
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Takashi Ishida, Toyoji Gushima
  • Patent number: 6791931
    Abstract: An accelerometer includes a field emitter to generate an electron beam current and a medium. An effect is generated when the electron beam current bombards the medium. The magnitude of the effect is affected by a physical impact imparting an amount of energy to the accelerometer to cause a relative movement between the field emitter and the medium. The amount of energy imparted to the accelerometer by the physical impact is determined by measuring the magnitude of the effect. The accelerometer can be integrally implemented in a storage device.
    Type: Grant
    Filed: March 16, 2001
    Date of Patent: September 14, 2004
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventor: Kenneth J. Eldredge
  • Patent number: 6791932
    Abstract: An optical system of an optical pick-up that is capable of using thin cover type and thick cover type optical discs. The system includes a light source portion for emitting a short wavelength laser beam for the thin cover type optical disc and a long wavelength laser beam for the thick cover type optical disc, and an objective lens for converging the laser beam onto an information layer of the optical disc through the cover layer. The objective lens has a diffractive lens structure having wavelength dependence such that spherical aberration varies in the overcorrected direction as incident wavelength increases. The light source portion emits the laser beam such that divergence of the long wavelength laser beam incident on the objective lens is larger than that of the short wavelength laser beam. The objective lens converges the laser beams of an identical diffractive order without changing position thereof.
    Type: Grant
    Filed: April 24, 2000
    Date of Patent: September 14, 2004
    Assignee: PENTAX Corporation
    Inventor: Koichi Maruyama
  • Patent number: 6791933
    Abstract: An optical pickup apparatus having compatibility with a recodable compact disk (CD-R) and a digital video disk (DVD), which uses a wavelength of one of a first light beam and a second light beam according to the recording medium to be used. In the optical pickup apparatus, laser light sources emit a first light beam having a relatively shorter wavelength for the. DVD and a second light beam having a longer wavelength for the CD-R, respectively. An objective lens has a predetermined focal length in accordance with the position of an information recording surface in the DVD. An optical path control unit controls the path of light beams so that the light beam emitted from one of the laser light sources is directed to the objective lens and the light output from the objective lens is directed to the optical detection unit.
    Type: Grant
    Filed: March 1, 2000
    Date of Patent: September 14, 2004
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Jang Hoon Yoo, Chul Woo Lee, Chong Sam Chung, Pyong Yong Seong, Kun Ho Cho, Hyun Seob Choi, Yong Hoon Lee, Tae Kyung Kim, No Kyong Park
  • Patent number: 6791934
    Abstract: When it is intended to realize a lens having a large NA with one lens, an adjustment precision between both surfaces of the lens is very strict. Accordingly an objective lens having an NA of 0.8 or more was usually realized by two lenses. However, a working distance is small, and collision of the objective lens with a disc is apt to occur. A coma corrector for compensating coma caused by decentering of both surfaces in realizing the high NA lens with one lens is added. However, in this case, astigmatism occurs when the objective lens decenters from the coma corrector relatively accompanied with a tracking operation. The objective lens and the coma corrector are fixed to a mirror barrel so as to be unified with each other, and driven by a two-dimensional lens actuator. With such a constitution, decentering of the objective lens and the coma corrector does not occur, and hence astigmatism does not occur.
    Type: Grant
    Filed: February 19, 2002
    Date of Patent: September 14, 2004
    Assignees: Hitachi, Ltd., PENTAX Corporation
    Inventors: Takeshi Shimano, Tetsuo Ariyoshi, Kazuo Shigematsu, Koichi Maruyama, Shuichi Takeuchi
  • Patent number: 6791935
    Abstract: An optical head has a near-field light generating element generating near-field light; and a beam shaper which shapes an incident beam into a substantially toroidal beam and directs the shaped beam to said near-field light generating element. According to the optical head having the above-described structure, the incident light is shaped into a substantially toroidal beam without being intercepted, incident on the zonal part of the near-field light generating element, and condensed to a minute spot. That is, only the light of the high numerical aperture part is used with efficiency, and the light can be condensed to a minute spot.
    Type: Grant
    Filed: January 29, 2001
    Date of Patent: September 14, 2004
    Assignee: Minolta Co., Ltd.
    Inventors: Hiroshi Hatano, Kazuyuki Ogura, Akira Sato, Yujiro Suzuki
  • Patent number: 6791936
    Abstract: The invention relates to an apparatus for playing storage discs which can be set into rotation about a central axis of rotation (13) by a drive motor (15) and which cooperate with an optical unit (4) which during the rotation writes information onto or reads it from an active side, which storage disc (8) can be pressed against a disc platen (14) with the aid of a pressure device (5), which acts upon one of its disc surfaces (8c) in order to be held in its play position and to preclude vibrations of the storage disc (8) itself, the disc platen (14) having a diameter which substantially corresponds to that of the storage disc (8). The pressure device (5) of the apparatus acts only upon the information-free central (9) and is freely rotatable. The disc platen (14) is in frictional engagement with the storage disc (8) when this storage disc is pressed into position with the label side (8a) and is constructed as a turntable, which can be set into rotation by the drive motor (15).
    Type: Grant
    Filed: August 31, 2001
    Date of Patent: September 14, 2004
    Assignee: Koninklijke Philips Electronics N.V.
    Inventor: Norbert Kunze
  • Patent number: 6791937
    Abstract: A DVD-R 1 has a main information area 2 where data information is recorded in a track having a wobble, and first and second control data areas 3,15 each of which is disposed in an inner space closer to the disk center than the main information area 2. The information structure and physical structure of the first control area 3 are different from those of the second control area 15. In the second control area 15, predetermined physical format information and disk production information, for example, the last address of when data is written in the DVD-R 1, the maximum transfer rate or the like, are recorded. Thus, when the DVD-R 1 is reproduced by a DVD player etc., the physical format information and disk production information etc. recorded in the second control data area 15 are read.
    Type: Grant
    Filed: April 29, 2002
    Date of Patent: September 14, 2004
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Yoshihiro Tosaki, Masaru Odagiri, Hiromichi Shimada, Shinichi Tanaka
  • Patent number: 6791938
    Abstract: An optical recording medium used as a recording medium for information signals in which, in forming a groove along a recording track, a first groove and a second groove are formed to a first depth x to describe a double helix and a third groove having a second depth y shallower than the first depth x is formed between the first and second groves describing double helices. By setting the phase depths of these grooves to a pre-set range, signals required for tracking servo or seek are obtained to sufficient levels to realize stable tracking servo and seek.
    Type: Grant
    Filed: May 7, 2001
    Date of Patent: September 14, 2004
    Assignee: Sony Corporation
    Inventor: Sohmei Endoh
  • Patent number: 6791939
    Abstract: In accordance with methods and systems consistent with the present invention, an improved failure recovery system is provided that, upon detecting a failure, generates new routings for the network which (1) avoid the failure and (2) avoid deadlock. In this manner, after a failure is detected, the network remains as operational as possible while still avoiding deadlock. Thus, by using the improved failure recovery system, a network failure has a much less severe impact on the network than in conventional systems.
    Type: Grant
    Filed: June 2, 1999
    Date of Patent: September 14, 2004
    Assignee: Sun Microsystems, Inc.
    Inventors: Guy L. Steele, Jr., Steven K. Heller, Daniel Cassiday
  • Patent number: 6791940
    Abstract: A data network may comprise routers for transmitting data between locations in the network via alternative routes. A network gateway or server may normally send data packets to a particular default router but, for network communication recovery, the gateway needs to select a new default route if the first goes down. The recovery method of this invention comprises storing information indicative of respective ones of a plurality of said alternative routes; accessing the stored information to identify a first of said routes; directing data to the router means for the data to be transmitted to the said another location via the first route; sensing failure of said transmission and, in the event of such failure, accessing said stored information to identify a second of said alternative routes; and directing data to the router means for the data to be transmitted to the said another location via the second route.
    Type: Grant
    Filed: August 28, 2000
    Date of Patent: September 14, 2004
    Assignee: International Business Machines Corporation
    Inventor: Padinjaroot Gopi Rajesh
  • Patent number: 6791941
    Abstract: Tuning for connection admission control (CAC) algorithms in broadband ATM networks is accomplished using an overbooking technique based on aggregate effective bandwidth, AEBW, as an approximation to required bandwidth for given levels and classes of network traffic. An overbooking gain factor, &agr;t is developed—typically in a network operations system—based on long-term measurements supplied periodically by network switches. In operation, overbooking is introduced in small increments until a threshold (such as a cell loss threshold) is reached, at which point overbooking is reduced in a large step. A variety of network measurements can be used to apply the present invention to a range of traffic and service contexts.
    Type: Grant
    Filed: September 28, 1999
    Date of Patent: September 14, 2004
    Assignee: Lucent Technologies Inc.
    Inventors: Zbigniew Marek Dziong, Hongbin Ji
  • Patent number: 6791942
    Abstract: To reduce power consumption of a communications interface between a network and a processor, a method for controlling the interface monitors data traffic from sides of the interface. Upon detecting a predetermined period of no data traffic on both sides, the method disables an auto-negotiation mode of the interface and forces the interface to operate at its lowest speed. Prior to changing speed, the method may briefly remove a link signal or electrically isolate the network and the network interface to allow a peer to adapt to a new speed. When in the low speed mode, the method monitors data on both the processor side and the network side. Upon detecting a predetermined and configurable amount of data, the method enables the auto-negotiate mode. Prior to increasing the speed, the method may briefly remove a link signal to allow a peer to adapt to the new speed. Hysteresis may be included to prevent a speed change if a predetermined period has not occurred since a last speed change.
    Type: Grant
    Filed: June 20, 2001
    Date of Patent: September 14, 2004
    Assignee: General Instrument Corporation
    Inventor: Yucheng Jin
  • Patent number: 6791943
    Abstract: A method and associated apparatus for determining the bandwidth or transmission rate of a desired type of cell in a cell stream occurring over a digital communications network connection during a time interval between occurrences of a first and second predetermined event. The transmission rate of the desired cell, such as an Asynchronous Transfer Mode (ATM) Available Bit Rate (ABR) user cell may be measured only when certain conditions exist, eliminating unnecessary calculations from being performed. Furthermore, the cell bandwidth may be determined immediately upon occurrence of the predetermined events, providing real-time feedback and analysis to test and measurement and/or network nodes.
    Type: Grant
    Filed: February 27, 1998
    Date of Patent: September 14, 2004
    Assignee: Agilent Technologies, Inc.
    Inventor: Scott B. Reynolds
  • Patent number: 6791944
    Abstract: A mobile terminal for communicating with a base station in a packet radio services network. The terminal has a processor for determining one of a plurality of channels for communication between the mobile terminal and the base station; for digitally coding speech to provide speech information; for assembling speech information into speech packets; and for generating channel allocation requests for a channel in which to send speech packets. A radio transmitter is provided for transmitting the requests and the packets to a base station in the network. A radio receiver receives identities of channels allocated by the base station for the mobile terminal to transmit on. The processor is responsive to each received channel allocation to determine that packets are sent on the allocated channel. In the GPRS since a channel is released when there is no packet to transmit, higher traffic levels can be obtained using the same number of radio channels.
    Type: Grant
    Filed: August 30, 1999
    Date of Patent: September 14, 2004
    Assignee: Lucent Technologies Inc.
    Inventors: Cristian Demetrescu, Simon Fabri, Said Tatesh
  • Patent number: 6791945
    Abstract: The present invention is for shaping a packet time out threshold in a wireless telecommunications network including a TCP session. First, a TCP communications session (18) is identified during which first and second communications nodes (12, 14) communicate with one another by transmitting and receiving data packets across first and second channels (22, 24) of a wireless network (16). Next, a processor (26) located either in one of the communications nodes (12, 14) or in a network base station subsystem (20) determines delay characteristics of each of first and second channels (22, 24) of the communications session. Once the delay characteristics are determined, the processor (20) causes a delay packet to be transmitted on a slower of the first and second channels (22, 24) at predetermined intervals to increase an average time delay associated with both the first and second channels (22, 24). Consequently, the number of unnecessary packet time outs on the first and second channels (22, 24) is minimized.
    Type: Grant
    Filed: September 15, 2000
    Date of Patent: September 14, 2004
    Assignee: Motorola, Inc.
    Inventors: Samuel M. Levenson, Yutal T. Koh, Mark S. Hansen
  • Patent number: 6791946
    Abstract: A terminal-side message processing unit (3) of an ATM exchange (10) reserves a virtual connection that has been used for a communication between a transmitter terminal accommodated in the ATM exchange and a receiver terminal by registering the information of the virtual connection in a reserved-connection table (104) without releasing the virtual connection when a connection release request of the virtual connection is requested by the transmitter terminal, and reopens the communication between the transmitter terminal and the receiver terminal by way of the virtual connection which has been reserved by referring to the reserved-connection table (104) when a connection setup request of the same connection with the virtual connection that has been reserved is requested.
    Type: Grant
    Filed: November 19, 1999
    Date of Patent: September 14, 2004
    Assignee: NEC Corporation
    Inventor: Makoto Suzuki
  • Patent number: 6791947
    Abstract: A method and apparatus for in-line processing a data packet while routing the packet through a router in a system transmitting data packets between a source and a destination over a network including the router. The method includes receiving the data packet and pre-processing layer header data for the data packet as the data packet is received and prior to transferring any portion of the data packet to packet memory. The data packet is thereafter stored in the packet memory. A routing through the router is determined including a next hop index describing the next connection in the network. The data packet is retrieved from the packet memory and a new layer header for the data packet is constructed from the next hop index while the data packet is being retrieved from memory. The new layer header is coupled to the data packet prior to transfer from the router.
    Type: Grant
    Filed: August 4, 1998
    Date of Patent: September 14, 2004
    Assignee: Juniper Networks
    Inventors: Rasoul Mirzazadeh Oskouy, Dennis C. Ferguson, Hann-Hwan Ju, Raymond Marcelino Manese Lim, Pradeep S. Sindhu, Sreeram Veeragandham, Jeff Zimmer, Michael Hui
  • Patent number: 6791948
    Abstract: A network includes devices such as computers and the like, interconnected by switching nodes. The devices are identified by globally-unique identifiers, such as Ethernet MAC addresses or the like. At least some of the devices are configured to determine the topology of the network. In determining the network topology, a device operates in a series of iterations, in each iteration transmitting a request message over a path to determine whether an additional entity is present in the network. If an additional entity is present at the end of the path defined in the request message, the entity will generate a response, which is provided to the device. The device, on receiving the response, will add information concerning the entity to a network topology database, which it maintains to define the topology of the database. At least some of the devices, as they discover additional switching nodes in the network, will attempt to configure the switching nodes.
    Type: Grant
    Filed: December 27, 1999
    Date of Patent: September 14, 2004
    Assignee: Emulex Corporation
    Inventors: Peter J. Desnoyers, Shawn A. Clayton, Nitin D. Godiwala
  • Patent number: 6791949
    Abstract: A method for establishing and maintaining a wireless ad hoc network comprising backbone nodes which forward packets through the network and non-backbone nodes which are capable of using the network, but do not forward packets. Signaling packets containing one or more protocol support records are periodically generated and transmitted by each node to neighboring nodes and are forwarded through the network by backbone nodes. Non-network nodes are initially selected to become backbone members during a SELECTION process based on an assessment of the node's connectivity relative to its neighbors. Link quality between nodes is monitored and used during an EXPANSION process in which additional non-network nodes may become backbone members. Disconnected backbone segments are interconnected during a CONNECTION process and the network is maintained during a MAINTENANCE process by periodically assessing the value of a backbone node's membership in the backbone.
    Type: Grant
    Filed: April 28, 2000
    Date of Patent: September 14, 2004
    Assignee: Raytheon Company
    Inventors: Bong K. Ryu, Jason C. Erickson, James X. Smallcomb, Son K. Dao
  • Patent number: 6791950
    Abstract: USB 2.0 supports communication in low-speed (LS), full speed (FS) and high speed (HS). In the full speed mode, the wire segment between a hub and a device is terminated via a pull-up resistor 480 on the D+ data line on the downstream end of the segment. In the high-speed mode, both signal wires are terminated by the LS/FS driver 420 generating a single-ended zero via resistors 490. The device emulates a disconnect, while it operates in the high-speed mode, by activating the pull-up resistor 480. Including the D+ pull-up resistor is practically equivalent to an open end, enabling a reliable disconnect detection in the hub using the disconnection envelop detector 460. Detection of an (emulated) disconnect, triggers the reset en enumeration process. This allows the device to report a change in functionality without the user having to physically remove the device from the bus.
    Type: Grant
    Filed: December 22, 2000
    Date of Patent: September 14, 2004
    Assignee: Koninklijke Philips Electronics N.V.
    Inventor: Zong Liang Wu
  • Patent number: 6791951
    Abstract: A first connection stage includes connecting by a switched network control device a call from a first terminal with a terminal selection device, noticing “there is no terminal to be connected” to the first terminal as a selected result from the terminal selection device when no terminal is selected, and disconnecting the call. A second connection stage includes connecting by the switched network control device a call from a second terminal with the terminal selection device, noticing “there is a terminal to be connected” and “a connection number of the first terminal” to the second terminal as a selected result from the terminal selection device when the first terminal is selected, and disconnecting the call.
    Type: Grant
    Filed: April 18, 2000
    Date of Patent: September 14, 2004
    Assignee: KDD Corporation
    Inventors: Junnosuke Miyamoto, Hitomi Murakami, Shuji Kawabe, Kazuyasu Matsumoto
  • Patent number: 6791952
    Abstract: The disclosure relates to an asymmetric data access scheme eg Internet access scheme, over a fixed wireless access network. The disclosure provides apparatus for bandwidth efficient provision of asymmetric data services operating a method of communicating between a radio base station and a plurality of subscriber terminals, each subscriber terminal comprising a subscriber antenna. Each sector of a tri-sectored cellular arrangement operates a plurality of frequency division duplex pairs, plus one or more additional unpaired downlink frequencies. On the uplink, packet switched data is transmitted on the conventional access channel, eg ALOHA, but on the downlink, packet switched data is transmitted on an unpaired downlink frequency over a broad sectorized beam.
    Type: Grant
    Filed: October 31, 1997
    Date of Patent: September 14, 2004
    Assignee: Nortel Networks Limited
    Inventors: Jie Lin, Keith Russell Edwards, Richard John Driscoll
  • Patent number: 6791953
    Abstract: An interface apparatus includes a pulse generating unit which detects the change of reading target data and generates a start pulse, an adjusting unit which generates an adjusting signal that changes from a first signal level to a second signal level in response to the start pulse, a register unit comprising a register which fetches first reading target data synchronously with a clock when the adjusting signal is at the second signal level, and holds the data and outputs the data as second reading target data when the adjusting signal is at the first signal level, and a driver unit which outputs the first reading target data synchronously with the reading signal that is asynchronous with the clock when the adjusting signal is at the second signal level, and outputs the second reading target data synchronously with the reading signal when the adjusting signal is at the first signal level.
    Type: Grant
    Filed: March 6, 2003
    Date of Patent: September 14, 2004
    Assignee: NEC Electronics Corporation
    Inventors: Makoto Ogawa, Tetsuya Hashimoto
  • Patent number: 6791954
    Abstract: In the method according to the present invention, a signal from a mobile station is received. The standard deviation of the symbol error rate is determined, and power control with adaptive adjustment of an amount of change in the target signal-to-noise ratio is performed based on the determined standard deviation of the signal error rate and a target associated therewith.
    Type: Grant
    Filed: June 12, 2000
    Date of Patent: September 14, 2004
    Assignee: Lucent Technologies Inc.
    Inventors: Terry Si-Fong Cheng, Ching Yao Huang, Frances Jiang, Alexandro Federico Salvarini
  • Patent number: 6791955
    Abstract: The code division multiplex transmission system according to the present invention produces data for transmission by, time-division multiplexing the signals for synchronizing spread code prepared for an easy synchronization of spread code on the receiving side and the information related to the structure or synchronization of each of a plurality of transmission data streams such as parameters information about the coding rate of the convolution code and interleaving size for each transmission data stream, generating spread frequency modulated signals of the above time-division multiplexed signals by a spread frequency modulation using a spread code known to the receiving side, and code-division multiplexing the resulting spread frequency modulated signals over the spread frequency modulated signals of the plurality of transmission data streams.
    Type: Grant
    Filed: September 18, 2000
    Date of Patent: September 14, 2004
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Hideo Kikuchi, Mutsumu Serizawa, Tokihiko Yokoi, Eiichi Watanabe, Shuji Hirakawa
  • Patent number: 6791956
    Abstract: Apparatus for transmitting a signal from a periphery device to an Internet through a wireless local area network is disclosed herein, the apparatus including the following devices. Firstly, the converting device is used to transmit the signal between the local area network and the Internet using pack exchanging. Thus the frame is briefer than that used in the prior art. The frame is transmitted between the periphery device and the local area network with the frame of a brief structure. Second, the converting device is used as the bridge between the wireless local area network and the local area network. Third, the transceiving device is used to transmit the signal to the converting device through the wireless local area network. The transmitting periphery device is used to transmit a first output frame to the transceiving device. Thus the first output frame is sent to the converting device through the wireless local area network.
    Type: Grant
    Filed: June 9, 1998
    Date of Patent: September 14, 2004
    Assignee: Institute for Information Industry
    Inventor: Yuh-Rong Leu
  • Patent number: 6791957
    Abstract: An apparatus and method for processing a seamless handover in IMT-2000 system. The apparatus includes: a unit for performing an interface with a base station controller and an analog subscriber interface for a test; a unit, having a structure of a non-blocking common memory, for switching an asynchronous transfer mode cell; and a unit for performing a trunk interface.
    Type: Grant
    Filed: December 27, 2000
    Date of Patent: September 14, 2004
    Assignee: Hyundai Electronics Industries
    Inventor: Sang-Ha Kim
  • Patent number: 6791958
    Abstract: A method of routing control information and bearer traffic in a packet network. When a wireless communication device has established a connection in a coverage area serviced by an Access Network Controller (ANC) and a Serving Node and roams into an area serviced by a new ANC and a new Serving Node, the present invention routes control information to and from the device through the anchor Serving Node (Serving Node through which the connection was established). Bearer traffic is routed to and from the device through the ANC and Serving Node serving the area in which the wireless communication device is located.
    Type: Grant
    Filed: February 6, 2002
    Date of Patent: September 14, 2004
    Assignee: Motorola, Inc.
    Inventors: Stephen Spear, Sanjay Gupta, Richard Corrigan
  • Patent number: 6791959
    Abstract: Methods for improving communication performance in a wireless communication system where the wireless communication system has at least one mobile wireless communication device and a plurality of transmitter/receiver sites. The transmitter/receiver sites have a geographic area, defined as a cell, within which the mobile wireless wireless communication devices can communicate with at least one of the transmitter/receiver sites. The methods determine when the mobile wireless communication device should rate shift or roam based on connection quality measurement data or position information such as GPS.
    Type: Grant
    Filed: June 29, 1999
    Date of Patent: September 14, 2004
    Assignee: Broadcom Corporation
    Inventors: Brian G. Palmer, Alan F. Jovanovich
  • Patent number: 6791960
    Abstract: The frame synchronization words of the preferred embodiment are especially suitable for frame synchronization confirmation. By adding the autocorrelation functions of shaded frame synchronization words, double maximum values equal in magnitude and opposite polarity at zero and middle shifts are obtained. This property can be used to slot-by-slot and double-check frame synchronization timing and reduce the synchronization search time. Further, the present invention allows a simpler construction of a correlator circuit for a receiver.
    Type: Grant
    Filed: August 13, 1999
    Date of Patent: September 14, 2004
    Assignee: LG Information and Communications, Ltd.
    Inventor: Young-Joon Song
  • Patent number: 6791961
    Abstract: An order for physical channel reassignment is to be selected in a hybrid time division multiple access/code division multiple access wireless communication system. A fragmentation gauge is determined for each of a set of the physical channels. For each physical channel, the fragmentation gauge represents a fragmentation over time slots of that physical channel with respect to other physical channels of a user service of that physical channel. An order is selected for the set of physical channels for reassignment from a lowest to a highest quality. The order is based on in part each individual channel's fragmentation gauge.
    Type: Grant
    Filed: May 14, 2001
    Date of Patent: September 14, 2004
    Assignee: InterDigital Technology Corporation
    Inventors: Eldad Zeira, Guodong Zhang
  • Patent number: 6791962
    Abstract: A technique enabling enhanced stations to communicate with other enhanced stations that periodically or sporadically enter power save mode is disclosed. If a Q-station targeted for a direct link is in power save mode, an access point “wakes” the Q-station. The targeted Q-station responds by transmitting back a PS-Poll frame. The access point then forwards an awaiting direct_link_protocol_request frame to the targeted Q-station, which then responds by transmitting back a direct_link_protocol_response frame to the transmitting Q-station. Subsequently, the targeted Q-station can expect to receive a frame directly from a Q-station requesting the direct link. For example, a data frame containing data or a direct_link_protocol_probe frame can be transmitted. In this way, Q-stations do not have to track when other Q-stations are in power save mode.
    Type: Grant
    Filed: January 29, 2003
    Date of Patent: September 14, 2004
    Assignee: Globespan Virata, Inc.
    Inventor: Maarten Menzo Wentink
  • Patent number: 6791963
    Abstract: A method for formatting a signal in a mobile communication system by appending a plurality of medium access control headers to a plurality of medium access control-service data units for data transfer between a mobile statio and network in the mobile communication system. If the service data units have the same characteristics, a medium access control-protocol data unit is formed by successively coupling the service data units to any one of the medium access control headers. If the service data units have different characteristics, the protocol data unit is formed by sequentially coupling each of the service data units and each of the medium access control headers.
    Type: Grant
    Filed: September 30, 1999
    Date of Patent: September 14, 2004
    Assignee: LG Electronics, Inc.
    Inventors: In Tae Hwang, Sang Rim Shin, Myoung Jin Ok
  • Patent number: 6791964
    Abstract: A receiving device in a multi-carrier CDMA communication system. In the receiving device, a time compensation means has a time tracker for each of signals received on multi-carriers and generates a time delay compensation signal by combining time errors of the carriers received from the time trackers. A first PN sequence generator generates a first PN sequence whose time delay is compensated for by the time delay compensation signal. A plurality of PN despreaders PN-despread the signals received on the multi-carriers by the first PN sequence. A frequency compensation means detects pilot signals corresponding to the PN-despread signals, generates frequency error signals for the carriers by the detected pilot signals, and compensates for frequency errors of the signals received on the multi-carriers. A phase compensation means compensates for phases for the carriers using the PN-despread signals and the pilot signals. A multiplexer multiplexes the phase-compensated signals.
    Type: Grant
    Filed: December 30, 1999
    Date of Patent: September 14, 2004
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Jong-Yoon Hwang, Sang-Min Bae, Jin-Woo Heo
  • Patent number: 6791965
    Abstract: A code multiplexing transmitting apparatus spread-spectrum modulates transmission data of a plurality of channels by spreading codes that differ from one another, combines the spread-spectrum signals of each of the channels and transmits the resultant spread-spectrum modulated signal. A spread-spectrum modulating unit for each channel includes a phase shifter for shifting, by a predetermined angle channel by channel, the phase of a position vector of the spread-spectrum modulated signal of each channel. As the result of such phase control, the phases of pilot signal portions of the spread-spectrum modulated signals of the respective channels are shifted relative to one another so that the peak values of the code-multiplexed signal can be suppressed.
    Type: Grant
    Filed: October 17, 2002
    Date of Patent: September 14, 2004
    Assignee: Fujitsu Limited
    Inventors: Kazuo Nagatani, Yasuyuki Oishi, Hidenobu Fukumasa, Hajime Hamada, Yoshihiko Asano
  • Patent number: 6791966
    Abstract: A method of transmitting a codeword over a transmission channel using a plurality of radio bursts. The codeword comprises a first sequence of time ordered protected bits and a second sequence of time ordered unprotected bits, and the radio bursts together provide a set of time ordered bit positions. Successive bits of said first sequence are allocated to the radio bursts in a cyclical manner so that adjacent protected bits are allocated to different radio bursts, while successive bits of said second sequence are allocated to remaining bit positions of the radio bursts in the time order of those remaining bit positions. The radio bursts are then transmitted sequentially on different frequency bands.
    Type: Grant
    Filed: February 23, 1999
    Date of Patent: September 14, 2004
    Assignee: Nokia Mobile Phones Ltd.
    Inventors: Hannu Mikkola, Janne Vainio
  • Patent number: 6791967
    Abstract: A wireless base station that has a plurality of antennas and repeatedly executes a cycle where reception and transmission are performed to communicate with a plurality of mobile stations at a same time using an adaptive array method. During reception in a cycle, the wireless base station calculates first weight vectors for forming directivity patterns and uses the first weight vectors during transmission to form the same directivity patterns as during reception in a same cycle. When a reception error occurs during reception of a signal from an arbitrary mobile station, the wireless base station calculates, from current response vectors of other mobile stations, a second weight vector that is used in place of the first weight vector when forming a directivity pattern for the arbitrary mobile station during transmission in a same cycle as the reception error. This directivity pattern has null directivity for the other mobile stations.
    Type: Grant
    Filed: November 20, 2000
    Date of Patent: September 14, 2004
    Assignee: Sanyo Electric Co., Ltd.
    Inventor: Akira Ishida
  • Patent number: 6791968
    Abstract: A method and apparatus dynamically assigns each of a plurality of different information streams associated with one wireless communication unit (12a), to independent communication resources from different communication resource pools from each of a plurality of different wireless network elements (14a-14n), based on, for example, quality of service requirement data determined for each of the information streams. As such, the wireless communication unit (12a) may establish two or more separate links using two or more completely independent radio resources from different wireless base stations in the same system.
    Type: Grant
    Filed: October 24, 2002
    Date of Patent: September 14, 2004
    Assignee: Motorola, Inc.
    Inventor: Michael D. Kotzin
  • Patent number: 6791969
    Abstract: A multiple input/output switch includes a plurality of transmission control logic units and a plurality of reception control logic units. Each of the transmission control logic units is associated with a transmission data path, and each of the reception control logic units is associated with a reception data path. Each transmission control logic unit outputs a destination code on a communication medium when the transmission control logic unit receives data. The destination code identifies a reception data path to which the data is to be sent. The reception control logic units monitor the communication medium for their respective destination codes, and when detected, send a confirmation signal to the transmission control logic unit via the communication medium. Upon receipt of the confirmation signal, the transmission control logic unit outputs the received data to the reception control logic unit via the communication medium.
    Type: Grant
    Filed: September 15, 1999
    Date of Patent: September 14, 2004
    Assignee: Lucent Technologies Inc.
    Inventor: Robert E. Myer
  • Patent number: 6791970
    Abstract: A system and method for establishing a communication link between an internet telephony device and a PSTN telephone during a user registration period comprises receiving data from a user indicating a plurality of frequently called countries, accessing a gateway provider table comprising data on a plurality of gateway providers that provide service to the plurality of frequently called countries, determining the lowest cost gateway provider for the plurality of frequently called countries, and displaying to the user information on the lowest cost gateway provider for the plurality of frequently called countries.
    Type: Grant
    Filed: September 16, 1999
    Date of Patent: September 14, 2004
    Assignee: Mediaring Ltd.
    Inventors: Ede-Phang Ng, Wee Sin Tam
  • Patent number: 6791971
    Abstract: Methods, apparatus, systems, media and signals for providing a communications service are disclosed. One method involves receiving, on a packet network, a message requesting the communications service, and producing a query relating to implementation of the communications service for receipt by a Service Control Function (SCF), in response to the message, to cause the communications service to be implemented. Another method involves receiving, on a packet network, a query relating to implementation of a communications service, and producing a response to the query to cause the communications service to be implemented.
    Type: Grant
    Filed: December 1, 1999
    Date of Patent: September 14, 2004
    Assignee: Nortel Networks Limited
    Inventors: Marwan Osman, Antoine Zoghbi
  • Patent number: 6791972
    Abstract: An apparatus for interfacing a PBX with an ATM network, comprises a circuit switch part for establishing an ATM communication channel to connect the ATM network if a subscriber requests access to the ATM network, and an ATM network switch part for converting the signaling information from the ATM communication channel into the corresponding ATM network cell that is applied to the ATM network.
    Type: Grant
    Filed: June 9, 2000
    Date of Patent: September 14, 2004
    Assignee: Samsung Electronics Co., Ltd.
    Inventor: Jae-Won Hwang
  • Patent number: 6791973
    Abstract: A calling side ISDN terminal adapter (TA) judges if Internet call is possible or not when the telephone number of a destination side telephone set is specified by a calling side telephone set. If judged possible, a predetermined number, and ciphered Internet connection member identification number and password are set on the sub-address of call setting, and sent out to a destination side ISDN TA. When receiving the predetermined number, the destination side ISDN TA rings the bell of the destination side telephone set, and when it is off the hook, it connects to the destination side access point by the Internet connection member identification number and password, and notifies the calling side ISDN TA by putting the destination side IP address acquired at the destination side access point on the sub-address of call setting.
    Type: Grant
    Filed: July 17, 2000
    Date of Patent: September 14, 2004
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventor: Kazuo Yahiro
  • Patent number: 6791974
    Abstract: The universal Internet based telephony system is implemented as a process that is accessible via an Internet WEB page and executes on the WEB server that hosts the WEB page and/or a back-end Internet telephony server which is accessed and controlled by the WEB server. The customer accesses the universal Internet based telephony system via any existing Java Enabled Internet Browser software resident on the customer's personal computer, either as an adjunct process thereon, or as a dedicated Internet telephony process. When a customer accesses the Internet WEB page and clicks on the universal Internet based telephony system icon, the WEB server on which the WEB page resides executes the resident universal Internet based telephony system hyperlink script and transfers a newly opened browser session to the universal Internet based telephony system WEB site.
    Type: Grant
    Filed: August 11, 2000
    Date of Patent: September 14, 2004
    Assignee: eStara, Inc.
    Inventor: Jeffrey Douglas Greenberg
  • Patent number: 6791975
    Abstract: A method and system for supporting a real-time communication on an integrated packet-based network involve accumulating information about the communication, referred to as signature data, while the communication is being setup and/or is in progress and storing the signature data in a database that is openly accessible to any applications that are connected to the network. Once signature data regarding an active real-time communication is accumulated, portions of the signature data may be utilized to further process the active real-time communication. Providing an openly accessible communication profile that is accumulated while the communication is in progress allows applications to provide a higher level of service by tailoring actions to the profile of the specific communication.
    Type: Grant
    Filed: June 29, 1999
    Date of Patent: September 14, 2004
    Assignee: Siemens Information & Communication Networks, Inc.
    Inventors: Christoph A. Aktas, Bernard M. Guillot, Paul G. Mayer
  • Patent number: 6791976
    Abstract: A wireless communication method and arrangement that facilitates and allows a user at one end to send dual tone multiple frequency characters from one wireless unit to a second wireless unit completely within tandem free operation mode without changing to tandem operation mode. By remaining in tandem free operating mode during dual tone multiple frequency signaling the delay and distortion of the CODECs used in tandem operation mode is avoided, and the real possibility of missing bursts of dual frequency multiple frequency characters that exists presently because of existing timing requirements is removed.
    Type: Grant
    Filed: December 15, 2000
    Date of Patent: September 14, 2004
    Assignee: Lucent Technologies Inc.
    Inventors: Young U. Huh, Mahmoud R. Sherif