FR2361782A1 - 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 receivedInfo
- Publication number
- FR2361782A1 FR2361782A1 FR7624385A FR7624385A FR2361782A1 FR 2361782 A1 FR2361782 A1 FR 2361782A1 FR 7624385 A FR7624385 A FR 7624385A FR 7624385 A FR7624385 A FR 7624385A FR 2361782 A1 FR2361782 A1 FR 2361782A1
- 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
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
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.
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7624385A FR2361782A1 (en) | 1976-08-10 | 1976-08-10 | 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 |
BR7704096A BR7704096A (en) | 1976-08-10 | 1977-06-23 | IDENTIFICATION DEVICE FOR SUBSCRIBERS CALLING ON A RADIO TRANSMISSION NETWORK |
DE19772734293 DE2734293C2 (en) | 1976-08-10 | 1977-07-29 | Method for querying a large number of substations in a centrally controlled radio system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7624385A FR2361782A1 (en) | 1976-08-10 | 1976-08-10 | 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 |
---|---|
FR2361782A1 true FR2361782A1 (en) | 1978-03-10 |
FR2361782B1 FR2361782B1 (en) | 1981-10-09 |
Family
ID=9176728
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR7624385A Granted FR2361782A1 (en) | 1976-08-10 | 1976-08-10 | 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) | BR7704096A (en) |
FR (1) | FR2361782A1 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2517146A1 (en) * | 1981-11-20 | 1983-05-27 | Trt Telecom Radio Electr | METHOD FOR MANAGING INFORMATION TRAFFIC IN A CELL FORMED FROM MULTIPLE RADIO CHAINS AND DEVICE USING THE SAME |
EP0293627A1 (en) * | 1987-05-19 | 1988-12-07 | Ascom Radiocom AG | Radio transmission method |
EP0300200A2 (en) * | 1987-07-22 | 1989-01-25 | Motorola Inc. | Vehicle identification technique for vehicle monitoring system employing RF communications |
Citations (2)
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 |
-
1976
- 1976-08-10 FR FR7624385A patent/FR2361782A1/en active Granted
-
1977
- 1977-06-23 BR BR7704096A patent/BR7704096A/en unknown
Patent Citations (2)
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 |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2517146A1 (en) * | 1981-11-20 | 1983-05-27 | Trt Telecom Radio Electr | METHOD FOR MANAGING INFORMATION TRAFFIC IN A CELL FORMED FROM MULTIPLE RADIO CHAINS AND DEVICE USING THE SAME |
EP0080232A1 (en) * | 1981-11-20 | 1983-06-01 | Telecommunications Radioelectriques Et Telephoniques T.R.T. | Method of controlling the information traffic in a cell formed by a plurality of radio channels, and apparatus using this method |
EP0293627A1 (en) * | 1987-05-19 | 1988-12-07 | Ascom Radiocom AG | Radio transmission method |
EP0300200A2 (en) * | 1987-07-22 | 1989-01-25 | Motorola Inc. | Vehicle identification technique for vehicle monitoring system employing RF communications |
EP0300200A3 (en) * | 1987-07-22 | 1990-03-21 | Motorola Inc. | Vehicle identification technique for vehicle monitoring system employing rf communications |
Also Published As
Publication number | Publication date |
---|---|
BR7704096A (en) | 1978-06-06 |
FR2361782B1 (en) | 1981-10-09 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
ST | Notification of lapse |