CA2182935A1 - Source Position Detecting Method and Communications System, Communications Equipment and Relay Suitable for Executing Said Method - Google Patents

Source Position Detecting Method and Communications System, Communications Equipment and Relay Suitable for Executing Said Method

Info

Publication number
CA2182935A1
CA2182935A1 CA2182935A CA2182935A CA2182935A1 CA 2182935 A1 CA2182935 A1 CA 2182935A1 CA 2182935 A CA2182935 A CA 2182935A CA 2182935 A CA2182935 A CA 2182935A CA 2182935 A1 CA2182935 A1 CA 2182935A1
Authority
CA
Canada
Prior art keywords
relay
signal
preambles
equipment
communications
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.)
Granted
Application number
CA2182935A
Other languages
French (fr)
Other versions
CA2182935C (en
Inventor
Kiyoshi Mizuno
Noriyuki Takao
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.)
Toyota Motor Corp
Original Assignee
Toyota Motor Corp
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 Toyota Motor Corp filed Critical Toyota Motor Corp
Publication of CA2182935A1 publication Critical patent/CA2182935A1/en
Application granted granted Critical
Publication of CA2182935C publication Critical patent/CA2182935C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H04L12/46—Interconnection of networks
    • H04L12/4604—LAN interconnection over a backbone network, e.g. Internet, Frame Relay
    • H04L12/462—LAN interconnection over a bridge based backbone

Abstract

A source position detecting method and a communications system, communications equipment and relay suitable for implementing this method. When relaying a coded data signal from one individual network to another individual network, a first relay, for instance, increases the length of preambles by 1 and when relaying to the next individual network, a second relay, for instance, decreases the length of preambles by 2.
Increment/decrement processing of the length of preambles can be carried out without decoding the main body of the coded data signal. Alternatively, preamble duration shortening accompanying the relay can be utilized and signal distortions accompanying signal transmission such as group delay and signal strength attenuation can also be utilized. Without processing the data at the relay, the destination equipment can obtain data concerning the position of the source equipment which transmitted the data signal, such as data concerning the transmission route of the data signal.
CA002182935A 1995-08-08 1996-08-08 Source position detecting method and communications system, communications equipment and relay suitable for executing said method Expired - Fee Related CA2182935C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP7202590A JP3045050B2 (en) 1995-08-08 1995-08-08 Transmission position detection method, communication system and relay device
JPHEI7-202590 1995-08-08

Publications (2)

Publication Number Publication Date
CA2182935A1 true CA2182935A1 (en) 1997-02-09
CA2182935C CA2182935C (en) 2000-12-19

Family

ID=16460009

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002182935A Expired - Fee Related CA2182935C (en) 1995-08-08 1996-08-08 Source position detecting method and communications system, communications equipment and relay suitable for executing said method

Country Status (4)

Country Link
US (1) US5872772A (en)
EP (1) EP0758172A3 (en)
JP (1) JP3045050B2 (en)
CA (1) CA2182935C (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2846462A1 (en) * 2002-10-28 2004-04-30 St Microelectronics Sa GROWING MONOTONE COUNTER IN AN INTEGRATED CIRCUIT
KR100766476B1 (en) * 2006-03-14 2007-10-12 주식회사 엠티아이 System and mtehod for location acquisition of terminal in OFDM mobile telecommunication system
GB2440981A (en) * 2006-08-18 2008-02-20 Fujitsu Ltd Wireless multi-hop communication system
JP6346256B2 (en) 2016-12-14 2018-06-20 ファナック株式会社 Numerical controller
CN110691053A (en) * 2018-07-06 2020-01-14 财团法人工业技术研究院 Software defined radio system for packet detection and packet detection method

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4896315A (en) * 1987-07-23 1990-01-23 Digital Equipment Corporation Apparatus and method for determining network component locations on a local area network system cable segment
US5105424A (en) * 1988-06-02 1992-04-14 California Institute Of Technology Inter-computer message routing system with each computer having separate routinng automata for each dimension of the network
JPH0234059A (en) * 1988-07-25 1990-02-05 Mitsubishi Electric Corp Processing system for node equipment
US5272728A (en) * 1990-03-20 1993-12-21 Fumio Ogawa Preamble length adjustment method in communication network and independent synchronization type serial data communication device
US5198805A (en) * 1990-09-04 1993-03-30 Hewlett-Packard Company Method and apparatus for monitoring a network and locating a node using signal strength calculations
EP0501446B1 (en) * 1991-02-27 1997-05-02 Nec Corporation Multiple access communication system capable of deciding a connection route among a central station, repeater stations, and terminal stations
EP0537408B1 (en) * 1991-10-14 1997-08-06 International Business Machines Corporation Routing in a network of bridge-connected LAN segments
EP0608653A1 (en) * 1993-01-26 1994-08-03 International Business Machines Corporation Method and system for routing information between nodes in a communication network
JPH07245614A (en) * 1994-03-04 1995-09-19 Fujitsu Ltd Method for measuring inter-equipments distance on lan and equipment therefor

Also Published As

Publication number Publication date
US5872772A (en) 1999-02-16
EP0758172A2 (en) 1997-02-12
CA2182935C (en) 2000-12-19
JPH0951352A (en) 1997-02-18
EP0758172A3 (en) 2004-03-03
JP3045050B2 (en) 2000-05-22

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Legal Events

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EEER Examination request
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