DE69431690D1 - Paketdatenkommunikationssystem - Google Patents

Paketdatenkommunikationssystem

Info

Publication number
DE69431690D1
DE69431690D1 DE69431690T DE69431690T DE69431690D1 DE 69431690 D1 DE69431690 D1 DE 69431690D1 DE 69431690 T DE69431690 T DE 69431690T DE 69431690 T DE69431690 T DE 69431690T DE 69431690 D1 DE69431690 D1 DE 69431690D1
Authority
DE
Germany
Prior art keywords
base stations
remote
transmission
units
link
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
DE69431690T
Other languages
English (en)
Other versions
DE69431690T2 (de
Inventor
Fredric Heiman
Laroy Tymes
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Symbol Technologies LLC
Original Assignee
Symbol Technologies LLC
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Symbol Technologies LLC filed Critical Symbol Technologies LLC
Publication of DE69431690D1 publication Critical patent/DE69431690D1/de
Application granted granted Critical
Publication of DE69431690T2 publication Critical patent/DE69431690T2/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W56/00—Synchronisation arrangements
    • H04W56/004—Synchronisation arrangements compensating for timing error of reception due to propagation delay
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
    • G06K7/0008—General problems related to the reading of electronic memory record carriers, independent of its reading method, e.g. power transfer
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K17/00—Methods or arrangements for effecting co-operative working between equipments covered by two or more of main groups G06K1/00 - G06K15/00, e.g. automatic card files incorporating conveying and reading operations
    • G06K17/0022—Methods or arrangements for effecting co-operative working between equipments covered by two or more of main groups G06K1/00 - G06K15/00, e.g. automatic card files incorporating conveying and reading operations arrangements or provisious for transferring data to distant stations, e.g. from a sensing device
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
    • G06K7/10—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation
    • G06K7/10009—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves
    • G06K7/10316—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves using at least one antenna particularly designed for interrogating the wireless record carriers
    • G06K7/10356—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves using at least one antenna particularly designed for interrogating the wireless record carriers using a plurality of antennas, e.g. configurations including means to resolve interference between the plurality of antennas
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/69—Spread spectrum techniques
    • H04B1/707—Spread spectrum techniques using direct sequence modulation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/69—Spread spectrum techniques
    • H04B1/713—Spread spectrum techniques using frequency hopping
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/69—Spread spectrum techniques
    • H04B1/713—Spread spectrum techniques using frequency hopping
    • H04B1/7156—Arrangements for sequence synchronisation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/14—Two-way operation using the same type of signal, i.e. duplex
    • H04L5/1469—Two-way operation using the same type of signal, i.e. duplex using time-sharing
    • H04L5/1484—Two-way operation using the same type of signal, i.e. duplex using time-sharing operating bytewise
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
    • H04L9/40—Network security protocols
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/02—Terminal devices
    • H04W88/06—Terminal devices adapted for operation in multiple networks or having at least two operational modes, e.g. multi-mode terminals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/69—Spread spectrum techniques
    • H04B1/713—Spread spectrum techniques using frequency hopping
    • H04B1/7156—Arrangements for sequence synchronisation
    • H04B2001/71563—Acquisition
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
DE69431690T 1993-04-08 1994-03-30 Paketdatenkommunikationssystem Expired - Lifetime DE69431690T2 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US08/044,648 US5528621A (en) 1989-06-29 1993-04-08 Packet data communication system

Publications (2)

Publication Number Publication Date
DE69431690D1 true DE69431690D1 (de) 2002-12-19
DE69431690T2 DE69431690T2 (de) 2003-08-21

Family

ID=21933533

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69431690T Expired - Lifetime DE69431690T2 (de) 1993-04-08 1994-03-30 Paketdatenkommunikationssystem

Country Status (10)

Country Link
US (1) US5528621A (de)
EP (1) EP0619663B1 (de)
JP (1) JP3515605B2 (de)
KR (1) KR100290435B1 (de)
AT (1) ATE227914T1 (de)
AU (1) AU667264B2 (de)
CA (1) CA2119335C (de)
DE (1) DE69431690T2 (de)
DK (1) DK0619663T3 (de)
ES (1) ES2184747T3 (de)

Families Citing this family (131)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5724357A (en) * 1992-01-28 1998-03-03 Fleetwood Group, Inc. Remote response system and data transfer protocol
US5418812A (en) * 1992-06-26 1995-05-23 Symbol Technologies, Inc. Radio network initialization method and apparatus
US5715278A (en) * 1993-05-11 1998-02-03 Ericsson Inc. Standby power saving in mobile phones
GB2282906B (en) * 1993-10-13 1996-11-06 Dataquill Ltd Data enty systems
US7387253B1 (en) 1996-09-03 2008-06-17 Hand Held Products, Inc. Optical reader system comprising local host processor and optical reader
US6021119A (en) * 1994-06-24 2000-02-01 Fleetwood Group, Inc. Multiple site interactive response system
US6334219B1 (en) 1994-09-26 2001-12-25 Adc Telecommunications Inc. Channel selection for a hybrid fiber coax network
USRE42236E1 (en) 1995-02-06 2011-03-22 Adc Telecommunications, Inc. Multiuse subcarriers in multipoint-to-point communication using orthogonal frequency division multiplexing
US7280564B1 (en) 1995-02-06 2007-10-09 Adc Telecommunications, Inc. Synchronization techniques in multipoint-to-point communication using orthgonal frequency division multiplexing
US7492905B2 (en) * 1995-05-17 2009-02-17 The Chamberlain Group, Inc. Rolling code security system
DE69637072T2 (de) * 1995-05-17 2008-01-10 The Chamberlain Group, Inc., Elmhurst Rollierendes code-sicherheitssystem
US6980655B2 (en) * 2000-01-21 2005-12-27 The Chamberlain Group, Inc. Rolling code security system
US5898733A (en) * 1995-06-30 1999-04-27 Philips Electronics North America Corporation Packet hopping system with sliding frequency, and transciever for the system
US6327245B1 (en) * 1995-06-30 2001-12-04 Philips Electronics North America Corporation Automatic channel switching for jamming avoidance in burst-mode packet data wireless communication networks
US5664075A (en) * 1995-10-17 1997-09-02 Xerox Corporation Print job identification and synchronization between NetWare PServer and atlas RPrinter protocol gateway
US5944659A (en) 1995-11-13 1999-08-31 Vitalcom Inc. Architecture for TDMA medical telemetry system
US5999808A (en) * 1995-12-12 1999-12-07 Aeris Communications, Inc. Wireless gaming method
US5804802A (en) * 1996-02-14 1998-09-08 United Parcel Service Of America, Inc. Two-way data communication manager
US6697415B1 (en) * 1996-06-03 2004-02-24 Broadcom Corporation Spread spectrum transceiver module utilizing multiple mode transmission
US20040004128A1 (en) * 1996-09-03 2004-01-08 Hand Held Products, Inc. Optical reader system comprising digital conversion circuit
US6161207A (en) * 1996-11-15 2000-12-12 Motorola, Inc. Communications unit and method of communicating having efficient packet acknowledgement
US6169789B1 (en) * 1996-12-16 2001-01-02 Sanjay K. Rao Intelligent keyboard system
US6061604A (en) * 1997-05-06 2000-05-09 Gas Research Institute RF base repeater for automated residence management system
US5852636A (en) * 1997-08-08 1998-12-22 Serge Mathieu Method of and apparatus for modulation of FSK carrier in a very narrow band
US6459704B1 (en) * 1997-08-12 2002-10-01 Spectrum Tracking Systems, Inc. Method and system for radio-location determination
US6535493B1 (en) 1998-01-15 2003-03-18 Symbol Technologies, Inc. Mobile internet communication protocol
US6694366B1 (en) 1998-04-29 2004-02-17 Symbol Technologies, Inc. Data reconciliation between a computer and a mobile data collection terminal
US6298047B1 (en) * 1998-05-20 2001-10-02 Steelcase Development Inc. Method and apparatus for establishing a data link between a portable data communications device and an interface circuit
US6826756B1 (en) 1998-06-30 2004-11-30 Symbol Technologies, Inc. Automatic transfer of data from an input device to a software application
US6237053B1 (en) 1998-06-30 2001-05-22 Symbol Technologies, Inc. Configurable operating system having multiple data conversion applications for I/O connectivity
JP3882354B2 (ja) * 1998-08-31 2007-02-14 ブラザー工業株式会社 無線通信方法及び無線通信システム
US7206849B1 (en) 1998-10-05 2007-04-17 Symbol Technologies, Inc. Communication in a wireless communications network when a mobile computer terminal may be unreachable
US6675203B1 (en) 1998-10-05 2004-01-06 Symbol Technologies, Inc. Collecting data in a batch mode in a wireless communications network with impeded communication
US6665000B1 (en) 1998-11-13 2003-12-16 Fleetwood Group, Inc. Remote site interactive system
SE521456C2 (sv) * 1998-12-15 2003-11-04 Ericsson Telefon Ab L M Förfarande och anordning vid ett distribuerat system
FR2787663B1 (fr) * 1998-12-18 2001-03-23 Canon Kk Acquittement de donnees dans un systeme de communication de donnees
US6985750B1 (en) 1999-04-27 2006-01-10 Bj Services Company Wireless network system
BR0012049A (pt) * 1999-06-29 2002-03-12 Siemens Information And Comuni Método e sistema para a coordenação de unidades móveis mestre com uma estação de base escrava
US6754259B1 (en) 1999-11-10 2004-06-22 International Business Machines Corporation Low-cost radio frequency (RF) link for point-to-point data transfer
US7492248B1 (en) 2000-01-14 2009-02-17 Symbol Technologies, Inc. Multi-tier wireless communications architecture, applications and methods
DE60141919D1 (de) * 2000-02-14 2010-06-02 Thomson Licensing Verfahren zur übertragung von nachrichten verteilt in mehreren paketen
US7027424B1 (en) * 2000-05-24 2006-04-11 Vtech Communications, Ltd. Method for avoiding interference in a digital communication system
US6659947B1 (en) * 2000-07-13 2003-12-09 Ge Medical Systems Information Technologies, Inc. Wireless LAN architecture for integrated time-critical and non-time-critical services within medical facilities
KR20030082536A (ko) 2000-07-21 2003-10-22 이트론 인코포레이티드 저속/고전력 주파수 호핑 방식을 이용한 확산 스펙트럼검침 시스템
AU2006241310B2 (en) * 2000-07-21 2011-06-02 Itron, Inc. Spread spectrum meter reading system utilizing low-speed/high-power frequency hopping
US6404772B1 (en) * 2000-07-27 2002-06-11 Symbol Technologies, Inc. Voice and data wireless communications network and method
US20020041622A1 (en) * 2000-09-29 2002-04-11 David Steed Spread spectrum frequency hopping communications system
JP2002152259A (ja) * 2000-11-13 2002-05-24 Yozan Inc 通信端末装置および課金処理装置
GB2371710B (en) * 2000-11-29 2003-04-09 Toshiba Kk Private branch exchange apparatus and accounting process method
US6987744B2 (en) * 2000-12-01 2006-01-17 Wherenet Corp Wireless local area network with geo-location capability
US7046657B2 (en) 2000-12-20 2006-05-16 Wherenet Corp Wireless local area network system with mobile access point station determination
US6804737B2 (en) * 2000-12-26 2004-10-12 Lsi Logic Corporation Methods and systems for intelligent I/O controller with channel expandability via master/slave configuration
GB2374771B (en) * 2000-12-29 2004-07-07 Vtech Communications Ltd Frame structure with diversity
US6892054B2 (en) * 2000-12-29 2005-05-10 Wherenet Corp Interference suppression for wireless local area network and location system
US20020159434A1 (en) * 2001-02-12 2002-10-31 Eleven Engineering Inc. Multipoint short range radio frequency system
US6657586B2 (en) 2001-05-03 2003-12-02 Wherenet Corp System and method for locating an object using global positioning system receiver
US7212563B2 (en) * 2001-05-04 2007-05-01 Wherenet Corp Real-time locating system and method using timing signal
US6811085B2 (en) * 2001-10-26 2004-11-02 Symbol Technologies, Inc. Miniature imager
US7103006B2 (en) * 2002-05-01 2006-09-05 International Business Machines Corporation Method, system, and article of manufacture for data transmission
US20030218539A1 (en) * 2002-05-22 2003-11-27 Hight Myra R. Location tracking apparatus, system, and method
US7417557B2 (en) * 2003-05-07 2008-08-26 Itron, Inc. Applications for a low cost receiver in an automatic meter reading system
US20050059406A1 (en) * 2003-09-17 2005-03-17 Trapeze Networks, Inc. Wireless LAN measurement feedback
US20050059405A1 (en) * 2003-09-17 2005-03-17 Trapeze Networks, Inc. Simulation driven wireless LAN planning
DE10356069A1 (de) * 2003-12-01 2005-06-23 Abb Research Ltd. Verfahren und Vorrichtung zur Reduktion des Stromverbrauchs in batteriebetriebenen Geräten
US7221927B2 (en) * 2004-02-13 2007-05-22 Trapeze Networks, Inc. Station mobility between access points
US20060009170A1 (en) * 2004-07-07 2006-01-12 Xg Technology, Llc Numerical control of sideband energy and modulation compression method for the radio frequency transmission of high speed data
DE602004031054D1 (de) * 2004-07-27 2011-02-24 Fujitsu Ltd In rfid-systemen verwendete interrogatoren
US20060038654A1 (en) * 2004-08-18 2006-02-23 Khalil Mohamad A Wireless messenger system
GB2417390B (en) * 2004-08-18 2007-11-14 Wecomm Ltd Data packet transmission
US7693488B2 (en) * 2004-09-30 2010-04-06 Vtech Telecommunications Limited System and method for asymmetric enhanced mode operation in a digital communication system
US8254310B2 (en) * 2007-06-19 2012-08-28 Fleetwood Group, Inc. Audience response system and method with multiple base unit capability
US9148409B2 (en) 2005-06-30 2015-09-29 The Chamberlain Group, Inc. Method and apparatus to facilitate message transmission and reception using different transmission characteristics
US8422667B2 (en) 2005-01-27 2013-04-16 The Chamberlain Group, Inc. Method and apparatus to facilitate transmission of an encrypted rolling code
US20060187050A1 (en) * 2005-02-11 2006-08-24 Psc Scanning, Inc. Loop antenna for RFID
DE112006000618T5 (de) 2005-03-15 2008-02-07 Trapeze Networks, Inc., Pleasanton System und Verfahren zur Verteilung von Schlüsseln in einem drahtlosen Netzwerk
US7551574B1 (en) * 2005-03-31 2009-06-23 Trapeze Networks, Inc. Method and apparatus for controlling wireless network access privileges based on wireless client location
US7573859B2 (en) 2005-10-13 2009-08-11 Trapeze Networks, Inc. System and method for remote monitoring in a wireless network
US7551619B2 (en) * 2005-10-13 2009-06-23 Trapeze Networks, Inc. Identity-based networking
US8638762B2 (en) 2005-10-13 2014-01-28 Trapeze Networks, Inc. System and method for network integrity
US7724703B2 (en) 2005-10-13 2010-05-25 Belden, Inc. System and method for wireless network monitoring
WO2007044986A2 (en) 2005-10-13 2007-04-19 Trapeze Networks, Inc. System and method for remote monitoring in a wireless network
US8250587B2 (en) * 2005-10-27 2012-08-21 Trapeze Networks, Inc. Non-persistent and persistent information setting method and system for inter-process communication
TW200742362A (en) * 2005-12-30 2007-11-01 Photron Technologies Ltd Systems and methods for providing modulation on demand in a narrowband communication system
US7558266B2 (en) 2006-05-03 2009-07-07 Trapeze Networks, Inc. System and method for restricting network access using forwarding databases
US20070260720A1 (en) * 2006-05-03 2007-11-08 Morain Gary E Mobility domain
US20070268514A1 (en) * 2006-05-19 2007-11-22 Paul Zeldin Method and business model for automated configuration and deployment of a wireless network in a facility without network administrator intervention
US20070268516A1 (en) * 2006-05-19 2007-11-22 Jamsheed Bugwadia Automated policy-based network device configuration and network deployment
US20070268515A1 (en) * 2006-05-19 2007-11-22 Yun Freund System and method for automatic configuration of remote network switch and connected access point devices
US20070268506A1 (en) * 2006-05-19 2007-11-22 Paul Zeldin Autonomous auto-configuring wireless network device
US8966018B2 (en) 2006-05-19 2015-02-24 Trapeze Networks, Inc. Automated network device configuration and network deployment
US7577453B2 (en) * 2006-06-01 2009-08-18 Trapeze Networks, Inc. Wireless load balancing across bands
US7912982B2 (en) 2006-06-09 2011-03-22 Trapeze Networks, Inc. Wireless routing selection system and method
US8818322B2 (en) 2006-06-09 2014-08-26 Trapeze Networks, Inc. Untethered access point mesh system and method
US9191799B2 (en) 2006-06-09 2015-11-17 Juniper Networks, Inc. Sharing data between wireless switches system and method
US9258702B2 (en) * 2006-06-09 2016-02-09 Trapeze Networks, Inc. AP-local dynamic switching
US7844298B2 (en) * 2006-06-12 2010-11-30 Belden Inc. Tuned directional antennas
US7724704B2 (en) * 2006-07-17 2010-05-25 Beiden Inc. Wireless VLAN system and method
US8340110B2 (en) 2006-09-15 2012-12-25 Trapeze Networks, Inc. Quality of service provisioning for wireless networks
US8072952B2 (en) 2006-10-16 2011-12-06 Juniper Networks, Inc. Load balancing
US20080107077A1 (en) * 2006-11-03 2008-05-08 James Murphy Subnet mobility supporting wireless handoff
JP4326557B2 (ja) * 2006-11-08 2009-09-09 フェリカネットワークス株式会社 無線通信システム、情報通信端末、携帯電話、リーダライタ、通信方法およびコンピュータプログラム
US7865713B2 (en) 2006-12-28 2011-01-04 Trapeze Networks, Inc. Application-aware wireless network system and method
US7873061B2 (en) 2006-12-28 2011-01-18 Trapeze Networks, Inc. System and method for aggregation and queuing in a wireless network
US7907679B2 (en) * 2007-01-12 2011-03-15 General Dynamics C4 Systems, Inc. Methods and systems for acquiring signals using coherent match filtering
US8139680B2 (en) 2007-01-12 2012-03-20 General Dynamics C4 Systems, Inc. Signal acquisition methods and apparatus in wireless communication systems
US7876865B2 (en) * 2007-06-08 2011-01-25 COM DEV International Ltd System and method for decoding automatic identification system signals
US20090161797A1 (en) * 2007-06-08 2009-06-25 Cowles Philip R Satellite detection of automatic identification system signals
GB2450680B (en) * 2007-06-22 2012-05-30 Ubiquisys Ltd Controlling timing of synchronization updates
US8902904B2 (en) 2007-09-07 2014-12-02 Trapeze Networks, Inc. Network assignment based on priority
US8509128B2 (en) * 2007-09-18 2013-08-13 Trapeze Networks, Inc. High level instruction convergence function
US8238942B2 (en) 2007-11-21 2012-08-07 Trapeze Networks, Inc. Wireless station location detection
US8150357B2 (en) 2008-03-28 2012-04-03 Trapeze Networks, Inc. Smoothing filter for irregular update intervals
CN101262147B (zh) * 2008-04-18 2010-06-02 深圳南瑞科技有限公司 远动工作站双机切换的装置
US8474023B2 (en) 2008-05-30 2013-06-25 Juniper Networks, Inc. Proactive credential caching
US20090310522A1 (en) * 2008-06-12 2009-12-17 Bertonis James G Wireless synchronization of base stations
US8978105B2 (en) 2008-07-25 2015-03-10 Trapeze Networks, Inc. Affirming network relationships and resource access via related networks
US8238298B2 (en) 2008-08-29 2012-08-07 Trapeze Networks, Inc. Picking an optimal channel for an access point in a wireless network
US20100081888A1 (en) * 2008-09-30 2010-04-01 Honeywell International Inc. System and method for monitoring the health of a subject system
CN101860948B (zh) * 2009-04-13 2014-07-30 华为技术有限公司 功耗调节的方法、设备及系统
US8780788B2 (en) 2009-09-25 2014-07-15 Com Dev International Ltd. Systems and methods for decoding automatic identification system signals
US9331774B2 (en) 2010-06-09 2016-05-03 Exactearth Ltd. Systems and methods for segmenting a satellite field of view for detecting radio frequency signals
US8565107B2 (en) 2010-09-24 2013-10-22 Hand Held Products, Inc. Terminal configurable for use within an unknown regulatory domain
US8542836B2 (en) 2010-12-01 2013-09-24 Juniper Networks, Inc. System, apparatus and methods for highly scalable continuous roaming within a wireless network
US8699982B2 (en) * 2012-03-27 2014-04-15 Adc Telecommunications, Inc. Systems and methods for implementing a distributed antenna system in a radio frequency integrated circuit
US9015567B2 (en) 2012-04-12 2015-04-21 Com Dev International Ltd. Methods and systems for consistency checking and anomaly detection in automatic identification system signal data
JP5803983B2 (ja) * 2013-06-07 2015-11-04 株式会社デンソー 通信装置
US10652743B2 (en) 2017-12-21 2020-05-12 The Chamberlain Group, Inc. Security system for a moveable barrier operator
US11074773B1 (en) 2018-06-27 2021-07-27 The Chamberlain Group, Inc. Network-based control of movable barrier operators for autonomous vehicles
US11423717B2 (en) 2018-08-01 2022-08-23 The Chamberlain Group Llc Movable barrier operator and transmitter pairing over a network
CN111666799A (zh) * 2019-03-08 2020-09-15 小船出海教育科技（北京）有限公司 一种口算题的校验方法及终端
US10997810B2 (en) 2019-05-16 2021-05-04 The Chamberlain Group, Inc. In-vehicle transmitter training

Family Cites Families (28)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3641433A (en) * 1969-06-09 1972-02-08 Us Air Force Transmitted reference synchronization system
US4291409A (en) * 1978-06-20 1981-09-22 The Mitre Corporation Spread spectrum communications method and apparatus
US4247908A (en) * 1978-12-08 1981-01-27 Motorola, Inc. Re-linked portable data terminal controller system
US4332027A (en) * 1981-10-01 1982-05-25 Burroughs Corporation Local area contention network data communication system
US4475208A (en) * 1982-01-18 1984-10-02 Ricketts James A Wired spread spectrum data communication system
US4409470A (en) * 1982-01-25 1983-10-11 Symbol Technologies, Inc. Narrow-bodied, single-and twin-windowed portable laser scanning head for reading bar code symbols
US4736095A (en) * 1982-01-25 1988-04-05 Symbol Technologies, Inc. Narrow-bodied, single- and twin-windowed portable laser scanning head for reading bar code symbols
US4758717A (en) * 1982-01-25 1988-07-19 Symbol Technologies, Inc. Narrow-bodied, single-and twin-windowed portable laser scanning head for reading bar code symbols
US4460120A (en) * 1982-01-25 1984-07-17 Symbol Technologies, Inc. Narrow bodied, single- and twin-windowed portable laser scanning head for reading bar code symbols
US4673805A (en) * 1982-01-25 1987-06-16 Symbol Technologies, Inc. Narrow-bodied, single- and twin-windowed portable scanning head for reading bar code symbols
US4697281A (en) * 1986-03-14 1987-09-29 Spectrum Cellular Communications Corporation, Inc. Cellular telephone data communication system and method
US4689785A (en) * 1984-09-14 1987-08-25 Sanyo Electric Co., Ltd. Data transmission system
IL74479A (en) * 1984-11-01 1994-04-12 Koor Metal Ltd Connects rods to create a spatial structure
US4639914A (en) * 1984-12-06 1987-01-27 At&T Bell Laboratories Wireless PBX/LAN system with optimum combining
US4689786A (en) * 1985-03-21 1987-08-25 Apple Computer, Inc. Local area network with self assigned address method
US4672658A (en) * 1985-10-16 1987-06-09 At&T Company And At&T Bell Laboratories Spread spectrum wireless PBX
US4850009A (en) * 1986-05-12 1989-07-18 Clinicom Incorporated Portable handheld terminal including optical bar code reader and electromagnetic transceiver means for interactive wireless communication with a base communications station
IL82561A (en) * 1986-05-27 1991-12-15 Fairchild Weston Systems Inc Secure communication system for multiple remote units
US4740792A (en) * 1986-08-27 1988-04-26 Hughes Aircraft Company Vehicle location system
US4995053A (en) * 1987-02-11 1991-02-19 Hillier Technologies Limited Partnership Remote control system, components and methods
US4789983A (en) * 1987-03-05 1988-12-06 American Telephone And Telegraph Company, At&T Bell Laboratories Wireless network for wideband indoor communications
JPH0671241B2 (ja) * 1987-09-10 1994-09-07 株式会社ケンウッド スペクトラム拡散通信の初期同期方式
US5280498A (en) * 1989-06-29 1994-01-18 Symbol Technologies, Inc. Packet data communication system
US5029183A (en) * 1989-06-29 1991-07-02 Symbol Technologies, Inc. Packet data communication network
JP2660441B2 (ja) * 1989-07-03 1997-10-08 双葉電子工業 株式会社 スペクトラム拡散通信用受信装置
US5079768A (en) 1990-03-23 1992-01-07 Metricom, Inc. Method for frequency sharing in frequency hopping communications network
US5111478A (en) * 1991-01-31 1992-05-05 Motorola, Inc. Method and apparatus for providing signal synchronization in a spread spectrum communication system
US5123029A (en) * 1991-06-21 1992-06-16 International Business Machines Corporation Broadcast-initiated bipartite frame multi-access protocol

Also Published As

Publication number Publication date
DE69431690T2 (de) 2003-08-21
DK0619663T3 (da) 2003-02-10
ES2184747T3 (es) 2003-04-16
KR100290435B1 (ko) 2001-09-17
EP0619663A3 (de) 1995-08-16
EP0619663B1 (de) 2002-11-13
ATE227914T1 (de) 2002-11-15
CA2119335A1 (en) 1994-10-09
JP3515605B2 (ja) 2004-04-05
US5528621A (en) 1996-06-18
KR940025232A (ko) 1994-11-19
JPH0799500A (ja) 1995-04-11
EP0619663A2 (de) 1994-10-12
AU667264B2 (en) 1996-03-14
AU5931994A (en) 1994-10-13
CA2119335C (en) 2002-03-05

Similar Documents

Publication Publication Date Title
DE69431690D1 (de) Paketdatenkommunikationssystem
EP0496986A3 (en) Packet data communication system
CA2072345A1 (en) Packet data communication system
DE69034229T2 (de) Paketdatenübertragungssystem
ATE151582T1 (de) Signalbehandlungsvorrichtung und verfahren
WO1996013907A3 (en) Wireless dsss tdma communications system
EP0691775A3 (de) Einrichtung und Verfahren zur Konfiguration und zum Betreiben eines schnurlosen Telefons in einem Frequenzsprungkommunikationssystem
ZA925728B (en) Improvements in a radio communication system
DE69433231D1 (de) Protokoll für ein Paketdatenkommunikationssystem
TW342571B (en) Method for transmitting superimposed image data in a radio frequency communication system
MY101408A (en) Hf data communications system
US7522689B2 (en) Clock recovery in communication systems
TW587896U (en) User equipment (UE) having rake receiver
KR960027579A (ko) 무선 전화 시스템
DE50015138D1 (de) Verfahren zur Übertragung von Daten
KR930018876A (ko) 제어 스테이션과 트랜스폰더간의 전송 경화 방법 및 이를 실행하는 장치
DE69311929T2 (de) Verfahren zur Verbesserung der Übertragung von Datenpaketen underschiedlicher Vorränge gemäss dem DQDB-Protokoll
TH29460A (th) การส่งชุดข้อมูลในระบบของการหักล้างกันของข้อมูล
KR20010028292A (ko) 시디엠에이 단말기의 송신시간 정렬장치
JPS59221130A (ja) デイジタル信号送受信方式
TH29460B (th) การส่งชุดข้อมูลในระบบของการหักล้างกันของข้อมูล

Legal Events

Date Code Title Description
8364 No opposition during term of opposition