Channels Separated In Frequency Patents (Class 370/302)
  • Patent number: 10425978
    Abstract: A method and apparatus of routing a call in a femtocell network are disclosed. In one example call routing method, a call is originated from the mobile station via a femtocell access point and the call is transmitted to a femtocell gateway, a mobile switching center and a carrier gateway server and onto an enterprise gateway server to obtain policy information. A routing policy is determined based on the obtained policy information and the call is routed to its destination based on the routing policy. The call may be routed via local media from a femtocell access point directly to the enterprise gateway server. The call routing procedures may implement the Iuh protocol and/or the session initiation protocol (SIP) for call signaling in the femtocell network. Call routing may be performed in a wireless cellular communications network or an enterprise network environment.
    Type: Grant
    Filed: February 13, 2018
    Date of Patent: September 24, 2019
    Assignee: TANGO NETWORKS, INC.
    Inventors: Patricia A. Landgren, Andrew Silver
  • Patent number: 10412079
    Abstract: There is disclosed an NFC device comprising an NFC communication unit and a memory unit; the NFC device being arranged to receive, through the NFC communication unit, a device identifier of a computing device and to store said device identifier in the memory unit; the NFC device further being arranged to send, upon or after storing said device identifier, at least one software installation key through the NFC communication unit to the computing device. Furthermore, a corresponding software installation method, software uninstallation method, computer program and article of manufacture are disclosed.
    Type: Grant
    Filed: September 25, 2015
    Date of Patent: September 10, 2019
    Assignee: NXP B.V.
    Inventors: Harish Dixit, Rahul Ravindra Pathak
  • Patent number: 9866066
    Abstract: Wireless power transmission (WPT) systems are provided. According to an embodiment, the WPT system uses one or more power transmitting coils and a receiver for electromagnetically coupled wireless power transfer. The electrodynamic receiver can be in the form of an electrodynamic transducer where a magnet is allowed to oscillate near a receiving coil to induce a voltage in the receiving coil, a piezoelectric transducer where the magnet causes a vibrating structure with a piezoelectric layer to move, an electrostatic transducer where movement of the magnet causes a capacitor plate to move, or a combination thereof. An alternating magnetic field from the transmitting coil(s) excites the magnet in the receiver into mechanical resonance. The vibrating magnet then functions similar to an energy harvester to induce voltage/current on an internal coil, piezoelectric material, or variable capacitor.
    Type: Grant
    Filed: August 5, 2011
    Date of Patent: January 9, 2018
    Assignee: University of Florida Research Foundation, Incorporated
    Inventors: David Patrick Arnold, Shuo Cheng, Vinod Reddy Challa
  • Patent number: 9408058
    Abstract: A device discovery method and apparatus of a Wi-Fi Peer-to-Peer (P2P) device for improving connection compatibility with legacy devices are provided. The method includes receiving a command for executing a modified P2P device discovery mode, configuring the Wi-Fi P2P device as a group owner autonomously, entering a group owner receive mode in which a probe request can be received, and discovering an external device which transmits the probe request.
    Type: Grant
    Filed: November 23, 2011
    Date of Patent: August 2, 2016
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Bu Seop Jung, Jhong Il Kim, Hyun Soo Kim, Jong Mu Choi, Jung Hun Lee
  • Patent number: 9008594
    Abstract: A method for adaptive communication in an HF frequency band includes at least one of the following steps: the determination of a payload subband S that is available for a transmission in the HF band, the selection in the payload subband S of a set of n frequency channels of identical width according to a frequency allocation plan and the quality of the link of each of said channels, or the simultaneous transmission on the n frequency channels of a signal complying with an HF waveform.
    Type: Grant
    Filed: November 30, 2011
    Date of Patent: April 14, 2015
    Assignee: Thales
    Inventors: Catherine Lamy-Bergot, Crambert Philippe, Multedo Gilbert, Merel Dominique, Gaschi Jean-François
  • Patent number: 9001636
    Abstract: Methods and systems for communicating in a wireless network may distinguish different types of packet structures by modifying the phase of a modulation constellation, such as a binary phase shift keying (BPSK) constellation, in a signal field. Receiving devices may identify the type of packet structure associated with a transmission or whether the signal field is present by the phase of the modulation constellation used for mapping for the signal field. In one embodiment, the phase of the modulation constellation may be determined by examining the energy of the I and Q components after Fast Fourier Transform. Various specific embodiments and variations are also disclosed.
    Type: Grant
    Filed: December 31, 2008
    Date of Patent: April 7, 2015
    Assignee: Intel Corporation
    Inventors: Adrian P. Stephens, John S. Sadowsky
  • Patent number: 8923272
    Abstract: Embodiments of the present invention relate to the field of security channel multiplexing, and disclose a method and an apparatus for multiplexing a HIP security channel. A method includes: receiving a message for requesting to transmit data; detecting whether a HIP security channel is established with the HIP host; if true, transmitting control signaling to the HIP host, where the control signaling is used to request to multiplex the HIP security channel to transmit data of the traditional host; if a response message returned from the HIP host is received, transmitting the data of the traditional host to the HIP host through the HIP security channel. With embodiments of the present invention, the quantity of HIP security channels established between the HIP proxy and the HIP host and the loads of maintaining the security channel can be reduced, and the utilization of the HIP security channel is increased.
    Type: Grant
    Filed: October 12, 2012
    Date of Patent: December 30, 2014
    Assignee: Huawei Technologies Co., Ltd.
    Inventor: Dacheng Zhang
  • Patent number: 8855067
    Abstract: Systems and techniques relating to wireless communications are described. A described technique includes generating one or more assignment records for a wireless communication device, generating an assignment message that includes the one or more generated assignment records, and transmitting the assignment message to cause the wireless communication device to initialize or update a multi-user group table based on the assignment message and filter one or more received multi-user transmissions based on the multi-user group table. The assignment message can indicate one or more group identifiers and one or more group member identifiers that are assigned to the wireless communication device and one or more group identifiers that are not assigned to the wireless communication device.
    Type: Grant
    Filed: March 31, 2011
    Date of Patent: October 7, 2014
    Assignee: Marvell World Trade Ltd.
    Inventors: Yong Liu, Harish Ramamurthy, Raja Banerjea, Hongyuan Zhang
  • Patent number: 8838798
    Abstract: Disclosed is a system for managing resources in a communication system including a plurality of systems not having permission a first frequency band, including: a coexistence manager managing the plurality of systems for coexistence and frequency sharing of the plurality of systems in available frequency bands when the available frequency bands by the plurality of systems are searched in the first frequency band; a coexistence enabler transmitting and receiving information of the plurality of systems and information of the coexistence manager; and a coexistence discovery and information server (CDIS) supporting a control of the coexistence manager for the plurality of systems.
    Type: Grant
    Filed: November 4, 2011
    Date of Patent: September 16, 2014
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Dong-Hun Lee, Hyunduk Kang
  • Patent number: 8755460
    Abstract: Provided is a method for processing data samples from a plurality of data channels. The method may include obtaining a plurality of data samples from the plurality of data channels. Obtaining the plurality of data samples may involve successively obtaining a data sample from each data channel of the plurality of data channels. Successively obtaining a data sample from each data channel may be performed a plurality of times during a specified time period. Each data sample of the plurality of data samples may be associated with a respective sample time, and each respective sample time may be relative to a single specified reference point in time. The method may further include, for each data sample of the plurality of data samples, determining a time-dependent coefficient value that may correspond to the sample time associated with the data sample, and applying the determined time-dependent coefficient value to the data sample.
    Type: Grant
    Filed: July 30, 2010
    Date of Patent: June 17, 2014
    Assignee: National Instruments Corporation
    Inventors: Garritt W. Foote, Hector Rubio
  • Patent number: 8750908
    Abstract: A quick paging channel in a random access wireless communication system includes at least one bit in a quick paging frame identifying the presence of a paging message for an access terminal or group of access terminals. The quick paging bits identifying the presence of a paging message for a first access terminal is encoded with one or more quick paging bits corresponding to one or more additional access terminals to produce one or more forward error correction bits. The jointly encoded quick paging bits are broadcast to the access terminals by time division multiplexing the quick paging frame with additional frames of information.
    Type: Grant
    Filed: June 15, 2006
    Date of Patent: June 10, 2014
    Assignee: QUALCOMM Incorporated
    Inventors: Avneesh Agrawal, Rajat Prakash
  • Patent number: 8750151
    Abstract: Techniques to calibrate downlink and uplink channels to account for differences in the frequency responses of transmit and receive chains are described. In one embodiment, pilots are transmitted on downlink and uplink channels and used to derive estimates of the downlink and uplink channel responses, respectively. Sets of correction factors are then determined based on estimates of downlink and uplink channel responses. A calibrated downlink channel is formed using a first set of correction factors for the downlink channel, and a calibrated uplink channel is formed using a second set of correction factors for the uplink channel. The first and second sets of correction factors may be determined using a matrix-ratio computation or a minimum mean square error computation. The calibration may be performed in real-time based on over-the-air transmission. Other aspects, embodiments, and features are also claimed and described.
    Type: Grant
    Filed: March 13, 2012
    Date of Patent: June 10, 2014
    Assignee: QUALCOMM Incorporated
    Inventors: Mark S. Wallace, John W. Ketchum, Jay Rodney Walton, Steven J. Howard
  • Patent number: 8744005
    Abstract: A method of generating modulation signals is disclosed including generally three steps. A plurality of modulation signals are generated, each of which is to be transmitted from a different one of a plurality of antennas in an identical frequency band, wherein each modulation signal includes a pilot symbol sequence including a plurality of pilot symbols used for demodulation. Each of the pilot symbol sequences is inserted at the same temporal point in each modulation signal, wherein the pilot symbol sequences are orthogonal to each other with zero mutual correlation among the plurality of modulation signals, each pilot symbol having a non-zero amplitude, the quantity of the plurality of pilot symbols in each sequence being greater than the quantity of the plurality of modulation signals to be transmitted. The plurality of modulation signals each including different transmission data and one of the pilot symbol sequences are output to the antennas.
    Type: Grant
    Filed: September 5, 2013
    Date of Patent: June 3, 2014
    Assignee: Panasonic Corporation
    Inventors: Yutaka Murakami, Masayuki Orihashi, Akihiko Matsuoka
  • Patent number: 8670709
    Abstract: A near-field communication (NFC) system may include a plurality of spaced-apart NFC sensors and at least one mobile wireless communications device. The at least one mobile wireless communications device may include a portable housing, an NFC circuit carried by the portable housing and configured to establish NFC communications with the NFC sensors when moved in close proximity therewith, and a controller carried by the portable housing and coupled to the NFC circuit. The controller may be configured to perform different mobile device operations based upon a timing and sequence in which the NFC sensors are communicated with.
    Type: Grant
    Filed: February 26, 2010
    Date of Patent: March 11, 2014
    Assignee: BlackBerry Limited
    Inventors: Jason T. Griffin, Steven Henry Fyke, Christopher Lyle Bender, Santiago Carbonell Duque, David Ryan Walker, Jerome Pasquero
  • Patent number: 8644760
    Abstract: An arrangement for an NFC compatible mobile device for delayed transfer of an established friend connection and a related method. The arrangement is suitable, for example, for delaying the transmission of information about a friend connection established over the NFC relative to another NFC compatible device to a remote device, such as a server, in that case the network connection is not available or does not fulfill a predetermined criterion.
    Type: Grant
    Filed: April 9, 2010
    Date of Patent: February 4, 2014
    Assignee: SoLoCEM Systems Oy
    Inventor: Tuomo Tuikka
  • Patent number: 8638819
    Abstract: A wireless communication transceiver and a mode switch device thereof. The transceiver includes: a first band transmission path; a first band reception path; a second band transmission path; a second band reception path; a path switch and a control unit. In a dual band time division duplexing mode, the control unit controls the path switch so that the path switch connects a received radio frequency signal from an antenna to the first band reception path, and connects a transmitted radio frequency signal from the second band transmission path to the antenna in an odd cycle or an even cycle; and controls the path switch so that the path switch connects a received radio frequency signal from the antenna to the second band reception path, and connects a transmitted radio frequency signal from the first band transmission path to the antenna in another odd cycle or another even cycle.
    Type: Grant
    Filed: September 29, 2010
    Date of Patent: January 28, 2014
    Assignee: International Business Machines Corporation
    Inventors: Jian Wen Chen, Lin Chen, Yong Hua Lin, Qing Wang, Rong Yan, Zhen Bo Zhu
  • Patent number: 8532145
    Abstract: A system for isolating individual channels in a broadcast signal is provided. The system includes a plurality of multipliers, each having an input and an output. A summer coupled to the outputs of each of the plurality of multipliers is provided to generate an output. A multiplication factor system provides a multiplication factor to each of the multipliers to select a predetermined frequency channel of the input signal.
    Type: Grant
    Filed: July 12, 2011
    Date of Patent: September 10, 2013
    Assignee: Conexant Systems, Inc.
    Inventor: Chi-Ping Nee
  • Patent number: 8526963
    Abstract: For restrictive reuse, each cell (or each sector) is assigned (1) a set of usable subbands that may be allocated to users in the cell and (2) a set of forbidden subbands that is not used. The usable and forbidden sets for each cell are orthogonal to one other. The usable set for each cell also overlaps the forbidden set for each neighboring cell. A user u in a cell x may be allocated subbands in the usable set for that cell. If user u observes/causes high level of interference from/to a neighboring cell y, then user u may be allocated subbands from a “restricted” set containing subbands included in both the usable set for cell x and the forbidden set for cell y. User u would then observe/cause no interference from/to cell y. The subband restriction may be extended to avoid interference from multiple neighboring cells.
    Type: Grant
    Filed: June 18, 2004
    Date of Patent: September 3, 2013
    Assignee: QUALCOMM Incorporated
    Inventors: Tingfang Ji, Avneesh Agrawal, Edward H. Teague
  • Patent number: 8526880
    Abstract: A communications device includes a housing and radio frequency (RF) circuitry and a processor carried by the housing and operative with each other. A Near Field Communications (NFC) circuit is carried by the housing and connected to the processor. This circuit is configured to detect an NFC enabled tag using an NFC communications protocol when the device is positioned near the tag. The circuit generates a disable signal to the processor upon detecting the NFC enabled tag. The processor is configured to cause the device to enter a locked, operating mode upon receiving the disable signal and to enter or remain in an unlocked, operating mode if the NFC circuit does not generate a disable signal indicative that the NFC circuit has not detected the NFC enabled tag.
    Type: Grant
    Filed: February 26, 2010
    Date of Patent: September 3, 2013
    Assignee: Blackberry Limited
    Inventor: Brett Foster
  • Patent number: 8526295
    Abstract: The present invention discloses a method for beam forming transmission, comprising the following steps: the eNB mapping the downlink data of the user and the UE-specific reference signals carried in the DwPTS Field for beam forming transmission according to the preset mapping structure, and performing the beam forming process; the eNB performing the resource mapping on results of the beam forming process result, primary synchronization signal, control signaling, Cell specific reference signal and other user data to form the DwPTS Field data; and the eNB sending the DwPTS Field data to the UE. The present invention further discloses a system and a corresponding device for beam forming transmission. The present invention can realize beam forming transmission in the Special Field DwPTS and improve the performance of the system without introducing a new user UE-specific reference signal mapping structure, which is simple to be realized.
    Type: Grant
    Filed: May 26, 2009
    Date of Patent: September 3, 2013
    Assignee: Datang Mobile Communications Equipment Co., Ltd.
    Inventors: Yanan Lin, Shiqiang Suo, Yu Ding, Guojun Xiao
  • Patent number: 8462646
    Abstract: A method for characterizing interference in a radio communication system including a plurality of radio transceiver stations configured to communicate with user equipment, includes: measuring, by user equipment in radio communication with a serving transceiver station, quantities indicative of interference from interfering transceiver stations; sending the measured quantities to the serving transceiver station; associating at least one codebook with the serving transceiver station, the codebook including a number of codewords each representing a respective quantized interference situation in an area covered by the serving transceiver station; and identifying in the codebook a codeword representative of the quantities measured by the user equipment.
    Type: Grant
    Filed: February 9, 2007
    Date of Patent: June 11, 2013
    Assignee: Telecom Italia S.p.A.
    Inventors: Sergio Barberis, Paolo Priotti
  • Patent number: 8457092
    Abstract: A quick paging channel in a random access wireless communication system includes at least one bit in a quick paging frame identifying the presence of a paging message for an access terminal or group of access terminals. The quick paging bits identifying the presence of a paging message for a first access terminal is encoded with one or more quick paging bits corresponding to one or more additional access terminals to produce one or more forward error correction bits. The jointly encoded quick paging bits are broadcast to the access terminals by time division multiplexing the quick paging frame with additional frames of information.
    Type: Grant
    Filed: May 6, 2010
    Date of Patent: June 4, 2013
    Assignee: QUALCOMM Incorporated
    Inventors: Avneesh Agrawal, Rajat Prakash
  • Patent number: 8335503
    Abstract: In an idle state transition from a macro mobile network to a femtocell, a mobile station looks for the femtocell to operate in a frequency band typically assigned to a macro network. For normal macro network operations, mobile stations look for base stations operating on various channels, e.g. based on hashing of respective mobile station identifiers. Femtocells generate a pilot beacon on a carrier frequency to enable mobile station acquisition, e.g. to redirect a mobile station to the operating frequency of the femtocell. To avoid the need to continually cycle or hop through all possible macro assigned carrier frequencies, pilot beacon transmissions of a particular femtocell are prioritized to correspond to the mobile station(s) expected to utilize that femtocell, e.g. by using existing network information, provisioning device information or self learning/calculating information regarding the carrier most likely to be used by any particular mobile station expected to use the femtocell.
    Type: Grant
    Filed: February 23, 2009
    Date of Patent: December 18, 2012
    Assignee: Cellco Partnership
    Inventors: Christopher Michael Desmond, Alicia Lauren Aull, Charles Albert Sanders, Michael Kearns, Eugene A. Carucci
  • Patent number: 8175524
    Abstract: According to one embodiment, an information processing apparatus includes an antenna element, a first wireless communication module including a printed circuit board and a wireless communication circuit which is provided on the printed circuit board, and a second wireless communication module. A diplexer is provided on the printed circuit board of the first wireless communication module, and includes a first terminal which is connected to the antenna element via a first antenna connector provided on the printed circuit board and a first cable, a second terminal which is connected to the wireless communication circuit via a wiring pattern on the printed circuit board, and a third terminal which is connected to a second antenna connector provided on the printed circuit board. The second wireless communication module is connected to the second antenna connector via a second cable.
    Type: Grant
    Filed: April 16, 2007
    Date of Patent: May 8, 2012
    Assignee: Kabushiki Kaisha Toshiba
    Inventor: Anwar Sathath
  • Patent number: 8155224
    Abstract: A transmission method for transmitting modulation signals of a plurality of channels to the same frequency band from a plurality of antennas. At the time when a symbol used for demodulation is inserted in a channel, in another channel symbol, the same phase and quadrature signals in the in-phase-quadrature plane are made to be zero signals. Thus, a plurality of modulation signals are multiplexed and transmitted and the transmitted multiplexed modulation signals are demultiplexed and demodulated at a reception apparatus, thereby improving the data transmission rate.
    Type: Grant
    Filed: February 2, 2010
    Date of Patent: April 10, 2012
    Assignee: Panasonic Corporation
    Inventors: Yutaka Murakami, Masayuki Orihashi, Akihiko Matsuoka
  • Patent number: 8036165
    Abstract: The quality of signals during SDMA is raised. In an uplink, a signal processing unit receives signals respectively from a plurality of terminal apparatuses which have been multiple-accessed by division of time. It derives receiving channel characteristics corresponding to the plurality of terminal apparatuses, respectively, for each time slot. In a downlink, the signal processing unit derives transmitting channel characteristics from the receiving channel characteristics derived and, based on the transmitting channel characteristics derived, it transmits signals respectively to the plurality of terminal apparatuses to which SDMA has been performed.
    Type: Grant
    Filed: May 16, 2005
    Date of Patent: October 11, 2011
    Assignee: Kyocera Corporation
    Inventors: Takeo Miyata, Katsutoshi Kawai
  • Patent number: 7983306
    Abstract: A system for isolating individual channels in a broadcast signal is provided. The system includes a plurality of multipliers, each having an input and an output. A summer coupled to the outputs of each of the plurality of multipliers is provided to generate an output. A multiplication factor system provides a multiplication factor to each of the multipliers to select a predetermined frequency channel of the input signal.
    Type: Grant
    Filed: July 23, 2008
    Date of Patent: July 19, 2011
    Assignee: Conexant Systems, Inc.
    Inventor: Chi-Ping Nee
  • Patent number: 7948925
    Abstract: A communication device has a first communication section that supports a first communication mode having a low communication rate and a second communication section that supports a second communication mode having a higher communication rate than the first communication mode. The communication device includes a packet generation section and a communication control section. The packet generation section generates a first portion containing authentication information used for connection authentication for the second communication mode and a second portion other than the first portion. The communication control section performs control to cause the first communication section to transmit the first portion and to cause the second communication section to transmit the second portion after the connection authentication succeeds using the authentication information contained in the first portion.
    Type: Grant
    Filed: February 9, 2009
    Date of Patent: May 24, 2011
    Assignee: Sony Corporation
    Inventors: Naoki Miyabayashi, Yoshihiro Yoneda, Isao Soma, Kazuo Takada, Seiji Kuroda, Yasuharu Ishikawa, Masahiro Sueyoshi
  • Patent number: 7885651
    Abstract: A newly-installed wireless base station collects, in an on-demand manner, cell setting information that includes position information, transmission power information, and radio frequency information from one or more neighboring base stations without using radio wave information, and determines its own radio frequency and transmission power level based on the cell setting information.
    Type: Grant
    Filed: June 18, 2004
    Date of Patent: February 8, 2011
    Assignee: Mitsubishi Electric Corporation
    Inventor: Masaya Akihara
  • Patent number: 7864663
    Abstract: The technology in this application spreads a signal over an available discontinuous spectrum, such as a radio frequency band, so that the spread signal only occupies the non-contiguous spectrum. In this way, CDMA transmission and reception can be used in a fragmented or non-contiguous spectrum that otherwise would not be useable for direct sequence spreading. Spreading over non-contiguous portions of spectrum is preferably performed without producing unacceptable interference in portions of unavailable spectrum located between the allowed spectrum. By avoiding unacceptable interference in portions of unavailable spectrum located between the allowed spectrum, the unavailable spectrum may be used by other users or services.
    Type: Grant
    Filed: October 30, 2007
    Date of Patent: January 4, 2011
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventor: Paul W. Dent
  • Patent number: 7778150
    Abstract: A control unit adjusts the number of streams for each of a plurality of packet signals and specifies a packet signal whose number of streams is the maximum among the packet signals whose number of streams has been adjusted. The control unit assigns a known signal and a data signal to each of streams for the specified packet signal. While setting another stream, the control unit assigns an extensional known signal to the another stream. The control unit also assigns a known signal and a data signal to at least one of streams for the packet signals which have not been specified.
    Type: Grant
    Filed: September 19, 2006
    Date of Patent: August 17, 2010
    Assignee: Sanyo Electric Co., Ltd.
    Inventor: Seigo Nakao
  • Patent number: 7646747
    Abstract: The present invention is directed to a channel structuring method that includes a step of providing time frames segmented at a predetermined interval in communication channels of n subcarriers, a step of selecting a predetermined number of subcarriers from n subcarriers and a step of inserting a common control channel signal and a common pilot signal periodically into each of the time frames of the selected subcarriers.
    Type: Grant
    Filed: January 23, 2001
    Date of Patent: January 12, 2010
    Assignee: NTT DoCoMo, Inc.
    Inventors: Hiroyuki Atarashi, Sadayuki Abeta, Mamoru Sawahashi
  • Patent number: 7532610
    Abstract: Embodiments of the invention reduces the computational complexity of adaptive frequency hopping mechanisms while mitigating the effects of interference. Embodiments of the invention can provide structured adapted hopping sequences that reduce transitions between good and bad channels and/or assign good channels to slots where data is to be transmitted and bad channels to idle slots. Embodiments of the can be designed to comply with current FCC regulations, yet remain adaptable to changing rules.
    Type: Grant
    Filed: September 10, 2002
    Date of Patent: May 12, 2009
    Assignee: Texas Instruments Incorporated
    Inventor: Anuj Batra
  • Patent number: 7447251
    Abstract: A system and method is provided for implementing forced frequency “hops” if the time it takes to perform a particular transaction is greater than the time available on a particular carrier frequency. In one embodiment of the present invention, a radio frequency identification (RFID) base station processor (in conjunction with program information stored in a base station memory) is adapted to (i) determine the amount of time available on a particular carrier frequency (e.g., pursuant to Federal Communications Commission (FCC) regulations, European Telecommunications Standardization Institute (ETSI) regulations, etc.), (ii) determine the amount of time it would take to perform a particular transaction, and (iii) force the base station to “hop” to another carrier frequency if the transaction time is longer than the available time. In one embodiment of the present invention, the time it would take to perform a particular transaction is the time it would take to perform the next transaction.
    Type: Grant
    Filed: January 12, 2007
    Date of Patent: November 4, 2008
    Assignee: Intermec IP Corp.
    Inventor: David Lee Eastburn
  • Patent number: 7359374
    Abstract: The present invention relates to a relay device enabling efficient management of a voice message and a caller to wait for transmission of the voice message in a short time. The relay device is located at a boundary between an existing telephone network and an IP network, converts and relays a voice signal and an IP packet. The relay device comprises a receiving unit receiving voice source data into which a voice message is digitized, a packet processing unit converting the received voice source data into a voice source data packet as the IP packet, a storage unit storing the converted voice source data packets, and a transmitting unit transmitting, when transmitting a designated voice message to a designated destination, the voice source data packet corresponding to the designated voice message among the stored voice source data packets.
    Type: Grant
    Filed: July 5, 2005
    Date of Patent: April 15, 2008
    Assignee: Fujitsu Limited
    Inventors: Hideo Abe, Kenji Fukuda, Susumu Kojima, Kazunori Suzuki
  • Patent number: 7200163
    Abstract: A method of splitting a signal (10) into two parts (10?, 10?) is disclosed together with signal processing circuitry (22) for the same. The method comprises the steps of derotating the signal (10) whereby the frequency band of the derotated signal overlaps zero frequency; and splitting the derotated signal into two parts, a first signal part (10?) consisting substantially of positive frequency signal components and a second signal part (10?) consisting substantially of negative frequency signal components. Also disclosed is methods, incorporating such a method of splitting a signal, for identifying the presence of in-band interference (11) in a signal and for despreading a spread spectrum signal.
    Type: Grant
    Filed: December 4, 2001
    Date of Patent: April 3, 2007
    Assignee: NXP BV.
    Inventor: Christopher J. Goodings
  • Patent number: 6804262
    Abstract: In a data-over-cable system, a cable head-end transmits a signal that includes a plurality of analog television signal components an at least one quadrature amplitude modulated (QAM) digital signal component, the signal components being defined by frequency channels. A cable modem has a tunable frequency selection system, operable at a first bandwidth, corresponding to the bandwidth of the frequency channels, and at a second, substantially narrower bandwidth, that provides a filtered signal and a power measurement system that measures the power level of the filtered signal. The frequency selection system scans through the channels, operating at its second bandwidth, and, in each channel, tunes to a first frequency and a second frequency. The power levels of the filtered signals from the first and second frequencies are measured and compared to distinguish the QAM digital signal components from the other signal components.
    Type: Grant
    Filed: April 28, 2000
    Date of Patent: October 12, 2004
    Assignee: 3Com Corporation
    Inventors: Mark O. Vogel, Philip T. Robinson
  • Publication number: 20040013093
    Abstract: With regard to the asynchronous transmission of digital values between a transmitter, from which the digital values are transmitted at a first frequency and a receiver (A, B), in which the received digital values are further processed and in particular outputted at a second frequency, it is never possible to harmonize the first frequency with the second frequency. In consequence as a result of frequency differences never to be harmonized an overflow or under-run of the transmitted digital values occurs.
    Type: Application
    Filed: July 11, 2003
    Publication date: January 22, 2004
    Applicant: Infineon Technologies AG
    Inventors: Stefan Eder, Gunther Fenzl