ES2184747T3 - Sistema de comunicaciones de paquetes de datos. - Google Patents

Sistema de comunicaciones de paquetes de datos.

Info

Publication number
ES2184747T3
ES2184747T3 ES94105049T ES94105049T ES2184747T3 ES 2184747 T3 ES2184747 T3 ES 2184747T3 ES 94105049 T ES94105049 T ES 94105049T ES 94105049 T ES94105049 T ES 94105049T ES 2184747 T3 ES2184747 T3 ES 2184747T3
Authority
ES
Spain
Prior art keywords
remote
base stations
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
ES94105049T
Other languages
English (en)
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
Application granted granted Critical
Publication of ES2184747T3 publication Critical patent/ES2184747T3/es
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 OR CALCULATING; 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 OR CALCULATING; 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 provisions for transferring data to distant stations, e.g. from a sensing device
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Computer Vision & Pattern Recognition (AREA)
  • Artificial Intelligence (AREA)
  • Toxicology (AREA)
  • Computer Security & Cryptography (AREA)
  • Electromagnetism (AREA)
  • General Health & Medical Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Small-Scale Networks (AREA)
  • Communication Control (AREA)
  • Circuits Of Receivers In General (AREA)

Abstract

SE USA UN SISTEMA DE TRANSMISION DE DATOS EMPAQUETADOS PARA ENLAZAR UN NUMERO DE UNIDADES RECOPILADORAS DE DATOS PORTATILES REMOTAS, TALES COMO LECTORAS DE CODIGOS DE BARRAS, A UN ORDENADOR CENTRAL, EL CUAL MANTIENE UN SISTEMA DE GESTION DE BASE DE DATOS. LOS PAQUETES DE DATOS SE ENVIAN DESDE LAS UNIDADES REMOTAS POR UN ENLACE RF A ESTACIONES BASE INTERMEDIAS, ENVIANDOSE A CONTINUACION POR LAS ESTACIONES BASE AL ORDENADOR CENTRAL POR UN ENLACE EN SERIE. SE USA UN METODO DE TRANSMISION DE CAMBIOS DE FRECUENCIAS PARA EL ENLACE DE RF. LAS UNIDADES REMOTAS Y LAS ESTACIONES BASE ESTAN TODAS SINCRONIZADAS RESPECTO A UNA SECUENCIA DE FRECUENCIAS SEUDOALEATORIA DE REPETICION, EN UNA BANDA (902-928 MHZ) QUE PERMITE ESTE TIPO DE TRANSMISION. LAS UNIDADES PORTATILES REMOTAS INICIAN UN INTERCAMBIO USANDO TRANSMISION DE RF A, Y DESDE, LAS ESTACIONES BASE, RECIBIENDO SOLAMENTE DURANTE UNA VENTANA DE TIEMPOS ESTRICTA, A CONTINUACION DE UNA TRANSMISION DESDE LA UNIDAD REMOTA. LAS ESTACIONES BASE NO PUEDENINICIAR UNA COMUNICACION A LAS UNIDADES REMOTAS, PERO EN CAMBIO ENVIAN DATOS A LAS UNIDADES REMOTAS TAN SOLO COMO PARTE DEL INTERCAMBIO. LOS MENSAJES DE RESPUESTA PROCEDENTES DE LAS ESTACIONES BASE A LAS REMOTAS CONTIENEN INFORMACION DE SINCRONIZACION PARA MANTENER COHERENCIA CON LA SECUENCIA SEUDOALEATORIA.
ES94105049T 1993-04-08 1994-03-30 Sistema de comunicaciones de paquetes de datos. Expired - Lifetime ES2184747T3 (es)

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 (1)

Publication Number Publication Date
ES2184747T3 true ES2184747T3 (es) 2003-04-16

Family

ID=21933533

Family Applications (1)

Application Number Title Priority Date Filing Date
ES94105049T Expired - Lifetime ES2184747T3 (es) 1993-04-08 1994-03-30 Sistema de comunicaciones de paquetes de datos.

Country Status (10)

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

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CA2119335A1 (en) 1994-10-09
AU5931994A (en) 1994-10-13
JPH0799500A (ja) 1995-04-11
US5528621A (en) 1996-06-18
EP0619663A2 (en) 1994-10-12
ATE227914T1 (de) 2002-11-15
KR940025232A (ko) 1994-11-19
EP0619663B1 (en) 2002-11-13
AU667264B2 (en) 1996-03-14
DE69431690D1 (de) 2002-12-19
KR100290435B1 (ko) 2001-09-17
DE69431690T2 (de) 2003-08-21
JP3515605B2 (ja) 2004-04-05
EP0619663A3 (en) 1995-08-16
CA2119335C (en) 2002-03-05
DK0619663T3 (da) 2003-02-10

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