FR2361783A2 - Radio communications system interrogating circuit - uses interrogation code for outstation group and which moves on to next group if no reply to code is received - Google Patents

Radio communications system interrogating circuit - uses interrogation code for outstation group and which moves on to next group if no reply to code is received

Info

Publication number
FR2361783A2
FR2361783A2 FR7624750A FR7624750A FR2361783A2 FR 2361783 A2 FR2361783 A2 FR 2361783A2 FR 7624750 A FR7624750 A FR 7624750A FR 7624750 A FR7624750 A FR 7624750A FR 2361783 A2 FR2361783 A2 FR 2361783A2
Authority
FR
France
Prior art keywords
group
code
outstation
reply
received
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
FR7624750A
Other languages
French (fr)
Other versions
FR2361783B2 (en
Inventor
Jean-Paul Raymond Guigo
Jean-Claude Jules Heim
Jean-Noel Pillot
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.)
Laboratoire Central de Telecommunications SA
Original Assignee
Laboratoire Central de Telecommunications SA
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 Laboratoire Central de Telecommunications SA filed Critical Laboratoire Central de Telecommunications SA
Priority to FR7624750A priority Critical patent/FR2361783A2/en
Priority to DE19772734293 priority patent/DE2734293C2/en
Priority to BR7705299A priority patent/BR7705299A/en
Publication of FR2361783A2 publication Critical patent/FR2361783A2/en
Application granted granted Critical
Publication of FR2361783B2 publication Critical patent/FR2361783B2/fr
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q9/00—Arrangements in telecontrol or telemetry systems for selectively calling a substation from a main station, in which substation desired apparatus is selected for applying a control signal thereto or for obtaining measured values therefrom
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W68/00—User notification, e.g. alerting and paging, for incoming communication, change of service or the like

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

The radio communications system has devices at its control centre to interrogate simultaneously a complete group of outstations using an interrogation code. Each outstation has detectors to recognise the interrogation code for the group, to which it belongs, and transmits its own identification code if its user wishes to talk. If no reply is received from a group, the control centre moves to another group. The numbers of outstations in the groups gradually reduces as this process continues, since they are dropped from the interrogation cycle, as they eventually answer.
FR7624750A 1976-08-10 1976-08-13 Radio communications system interrogating circuit - uses interrogation code for outstation group and which moves on to next group if no reply to code is received Granted FR2361783A2 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
FR7624750A FR2361783A2 (en) 1976-08-13 1976-08-13 Radio communications system interrogating circuit - uses interrogation code for outstation group and which moves on to next group if no reply to code is received
DE19772734293 DE2734293C2 (en) 1976-08-10 1977-07-29 Method for querying a large number of substations in a centrally controlled radio system
BR7705299A BR7705299A (en) 1976-08-13 1977-08-10 IDENTIFICATION DEVICE FOR SUBSCRIBERS CALLING ON A COMMUNICATION RADIO NETWORK

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7624750A FR2361783A2 (en) 1976-08-13 1976-08-13 Radio communications system interrogating circuit - uses interrogation code for outstation group and which moves on to next group if no reply to code is received

Publications (2)

Publication Number Publication Date
FR2361783A2 true FR2361783A2 (en) 1978-03-10
FR2361783B2 FR2361783B2 (en) 1981-11-20

Family

ID=9176865

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7624750A Granted FR2361783A2 (en) 1976-08-10 1976-08-13 Radio communications system interrogating circuit - uses interrogation code for outstation group and which moves on to next group if no reply to code is received

Country Status (2)

Country Link
BR (1) BR7705299A (en)
FR (1) FR2361783A2 (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR78472E (en) * 1960-09-30 1962-07-27 Constr Telephoniques Improvements to remote signaling and remote control systems
FR2256477A1 (en) * 1973-12-26 1975-07-25 Ibm

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR78472E (en) * 1960-09-30 1962-07-27 Constr Telephoniques Improvements to remote signaling and remote control systems
FR2256477A1 (en) * 1973-12-26 1975-07-25 Ibm

Also Published As

Publication number Publication date
FR2361783B2 (en) 1981-11-20
BR7705299A (en) 1978-07-04

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