WO1981002085A1 - Systeme de controle a distance et de transmission de donnees sur des lignes telephoniques non specialisees - Google Patents
Systeme de controle a distance et de transmission de donnees sur des lignes telephoniques non specialisees Download PDFInfo
- Publication number
- WO1981002085A1 WO1981002085A1 PCT/US1980/001709 US8001709W WO8102085A1 WO 1981002085 A1 WO1981002085 A1 WO 1981002085A1 US 8001709 W US8001709 W US 8001709W WO 8102085 A1 WO8102085 A1 WO 8102085A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- data
- selection
- remote monitoring
- monitoring unit
- telephone
- Prior art date
Links
Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M11/00—Telephonic communication systems specially adapted for combination with other electrical systems
- H04M11/002—Telephonic communication systems specially adapted for combination with other electrical systems with telemetering systems
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/16—Analogue secrecy systems; Analogue subscription systems
- H04N7/173—Analogue secrecy systems; Analogue subscription systems with two-way working, e.g. subscriber sending a programme selection signal
- H04N7/17309—Transmission or handling of upstream communications
- H04N7/17327—Transmission or handling of upstream communications with deferred transmission or handling of upstream communications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/16—Analogue secrecy systems; Analogue subscription systems
- H04N7/173—Analogue secrecy systems; Analogue subscription systems with two-way working, e.g. subscriber sending a programme selection signal
- H04N2007/17381—Analogue secrecy systems; Analogue subscription systems with two-way working, e.g. subscriber sending a programme selection signal the upstream transmission being initiated by the user terminal
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/16—Analogue secrecy systems; Analogue subscription systems
- H04N7/173—Analogue secrecy systems; Analogue subscription systems with two-way working, e.g. subscriber sending a programme selection signal
- H04N2007/1739—Analogue secrecy systems; Analogue subscription systems with two-way working, e.g. subscriber sending a programme selection signal the upstream communication being transmitted via a separate link, e.g. telephone line
Definitions
- This invention implements a network for remotely monitor ⁇ ing individual Subscriber use of a service.
- Information relating to the time of day and duration of such use, as well as data relating to the specific character of the service accessed is retained in the monitoring unit until such time as contact is established with a Central Computer monitoring and billing facility.
- the current embody ent of the invention is oriented toward use with cable television systems or over-the-air pay television scrambled systems and permits the construction of a "Pay Per Play" Program network.
- the remote monitoring unit is installed in the individ ⁇ ual Subscriber's home.
- a conventional Cable TV converter/program selector modified to provide selection information to the remote monitoring unit processor, is used by the Subscriber to access channels of programming.
- the processor stores the ti e-of-day when a particular channel is accessed in its data memory. Whenever a change in the channel being viewed occurs (i.e. A New Selection Is Made), this new time and channel information is also stored in the data memory. A list is thus maintained in the monitoring unit indicating the times and channels accessed by the Subscriber.
- the processor maintains, via programmed software routines, a 24 Hr. clock which is used to generate the time information.
- the number of channels monitored as well as the number of selection data packets which can be retained is theoretically quite large and is limited by purely practical manufacturing considerations.
- the remote monitoring unit is connected in parallel across the Subscribers' home telephone line by the means of a telephone interface unit.
- the processor attempts to communicate its stored data to the Central Office Computer, by automatically dialing the central office number.
- a stream of ASCII encoded alphanumeric data is transmitted by the remote monitor ⁇ ing unit as a sequence of frequency shift keyed audio tones within the voice bandwidth limits of the conven ⁇ tional telephone system.
- the data transmitted uniquely identifies the monitoring unit, and contains the list of subscriber program access data maintained in the data memory.
- the remote monitoring unit receives information from the Central Office Computer as to the accuracy of the transmission as well as control data relating to the Subscriber's continued use of the service.
- the Central Computer can terminate service by sending a message directing the remote monitoring unit to turn off the program access device.
- this system constitutes a sophisticated data collection, storage and transmission facility capable of bi-directional communication via the non-dedicated telephone network.
- Fig. I is a functional block diagram of the invention.
- Fig. 2 is a more detailed diagram of some of the elements of Fig. I.
- Fig. I there is shown a diagram of the preferred embodiment of the invention as a "Pay Per Play" T.V. Subscriber selection monitoring and data transmission ' remote monitoring Unit 19.
- the program selector and access Unit 1 feeds channel selection information to the remote monitoring Unit 19 via four signal lines 2.
- the channel selection information is formatted as binary TTL logic levels and is periodically scanned under program control by Processor 6 through control Interface 5.
- Processor 6 is programmed via software routines* permanently stored in Program Memory 4 to periodically compare the current state of the selection Data Lines 2 with the last selection made by the Subscriber, which is stored in Data Memory 5. In the event of a change in selection has occurred the Processor 6 sets a flag stored in Data Memory 5 and enters a software timing loop. If the Subscriber does not change his most recent selection within one minute the selection will be stored in Data Memory 5 as billing data. If the selection is changed before one minute expires the new selection becomes the reference for the timing loop and the previous selection is discarded. This imple ⁇ ments a "grace period" for previewing a selection and possibly changing it before billing data is stored.
- a 24 hour real time clock is maintained by Processor 6 by means of a software routine stored in Program Memory 4.
- Processor 6 is a microprocessor chip, typically a 6502 or similar device.
- a 1 MHz crystal 20, in conjuction with a conventional oscillator circuit 21, generates the necessary clock pulses for Processor 6.
- the 1 MHz pulses are also fed to Binary Counter 22 which is reset periodically by Logic Decoding Network 23 to generate a 1600 Hz Signal 24.
- Signal 24 is the receive and transmit clock for communications interface circuit 8.
- Signal 24 is also fed to Binary Counter 25 which divides by 16 and produces a 100Hz clock pulse 26. This pulse train 26 is applied to the interrupt input of Processor 6. Hence every 10 ms Processor 6 goes
- Data Memory 5 is a 128 location by 8 bit wide Ram Memory. Of these locations 32 are reserved for program work space leaving 96 available for subscriber selection data. A selection is stored as two bytes of time data, hours and minutes, and 1 byte of channel selection identification. Thus 32 different selections can be stored before Data Memory is consumed.
- the four lines used for Selection Information 2 limits the maximum number of selections currently recognized by the system to 16. It is readily apparent that by adding additional circuit devices the above restrictions are eliminated and the only restrictions to the number of data points and events which can be monitored and stored, are practical considerations of manufacture and specific application need.
- the Remote Monitoring Unit 19 attempts to transmit the subscriber selection data to the Central Office Computer 14 over the subscribers home telephone line 13.
- the module which permits the Processor 6 to communicate over the home Telephone Line 13 is the Telephone' Interface 12.
- the Telephone Interface 12 generates a Signal 73 which indicates the switch hook status, that is, whether the phone is in use or free.
- _0VP1_ permits the Processor 6 to access the telephone line and to generate dial pulses.
- the telephone interface 12 provides the necessary isolation and audio conditioning to permit the connection of the Remote Monitoring Unit to a conventional subscriber telephone network.
- the Processor 6 When initiating a data exchange with the Central Office Computer 14, the Processor 6 checks to see if the home Telephone Line 13 is free by inputting switch hook status data from Telephone Interface Unit 12 via Control Interface 5. If the line is busy the Processor 6 con ⁇ tinues to check the line status at random intervals until the line is free. At this point the Processor 6 outputs a logic level on Line Seize input 74 causing the telephone interface unit to place an impedance on the Telephone Line 13 simulating the start of a call and requesting a dial tone. The Processor 6 waits for 3 seconds and assumes that a dial tone is present on the line. At that point the Processor 6 enters an auto ⁇ dial subroutine stored.,in-.Program Memory 4.
- This sub ⁇ routine causes the Processor 6 to pulse the Line Seize data line 74, causing the Telephone Interface 12 to remove and replace the impedance across the Telephone Line 13 simulating the dialing of a conventional tele ⁇ phone.
- the telephone number of the central office computer 14 is programmed in Program Memory 4.
- the autodial software routine generates the necessary mark- space timing to dial this pre-programmed number.
- An automatic answering unit is provided at the Central Office Computer site 14 which picks up the line automatically and signals the successful establish ⁇ ing of the call by transmitting a 1000 Hz tone for .5 seconds over Telephone Line 13. This tone is fed via
- Processor 6 assumes an unsuccessful dialing and releases Telephone Line 13, and attempts to redial a random interval later.
- the Processor 6 proceeds to transmit the selection data in Data Memory 5. Transmission of data is accomplished under software control via routines programmed in Program Memory 4, by sequentially loading data bytes into Communications Interface 8.
- the Transmit Data output 18 is a serial pulse train which causes Tone Generator 16 to produce an FSK modulated audio tone within the frequency pass- band of a voice grade telephone line which is fed via audio line 10 to telephone interface 12 and out over telephone line 13 to central computer 14.
- the message transmitted by Remote Monitoring Unit 19 to bhe Central Office Computer 14 consists of a number uniquely identifying the remote monitoring unit followed by a sequential listing of all selection data stored in memory prior to the current transmission and after the previous transmission.
- the selection data sent consists of time of day and a channel number for each selection.
- the Remote Monitoring Unit 19 When the transmission is complete the Remote Monitoring Unit 19 expects a return message from the Central Office Computer 14. The central computer scans the received message for gross errors or possible trans ⁇ mission failure. If no errors are found the Central Office Computer 14 signals the Remote Monitoring Unit 19 that the data was successfully received and both the Central Office Computer 14 and Remote Monitoring Unit 19 release their respective telephone connections. If an error in transmission does occur the Remote Monitoring Unit 19 is requested to retransmit.
- the selection data is posted by the Central Office Computer 14 to the individual Subscriber's account. If the account is in arrears it is desirable to restrict the Subscriber's access to the premium channel.
- the Central Office Computer 14 in its return message can direct the Remote Monitoring Unit 19 to turn off the access device. If Processor 6, on scanning, received data detects a "turn off" message, it outputs an appro ⁇ priate signal via Control Interface 5 over Control Line 3 to disable Access Unit 1.
- Transmission of data from the Central Office Compu ⁇ ter 14 to Remote Monitoring Unit 19 is also via FS audio tones over Telephone Line 13.
- the Telephone Interface 12 feeds the Audio 10 to Tone Detector 16 which changes the modulated signal to binary logic levels which are input to Communications Interface 8 via Receive Data line 17.
- Processor 6 periodically scans Communications Interface 8 in the receive mode to accept data until the communication is complete.
Abstract
Systeme comprenant une pluralite d'unites de controle a distance (19) et un ordinateur central (14), pour controler une selection d'abonnes d'une source de programme. Chaque unite de controle a distance possede un microprocesseur (6), un programme et une memoire de donnees associes (4, 5), des circuits de commande et d'interface (5, 8) et une horloge en temps reel executee par logiciel (6). L'heure du jour et l'identification du canal du programme selectionne sont enregistres en memoire. La communication avec l'ordinateur de la centrale est initiee par l'unite de controle a distance a des intervalles programmes sur le reseau telephonique conventionnel en utilisant la ligne telephonique individuelle de l'abonne dont l'acces se fait via un dispositif d'interface telephonique (12). Les donnees envoyees a l'ordinateur consistent en un code d'identite unique pour chaque unite de controle, canaux selectionnes et temps de selection. L'unite de controle a distance peut retransmettre les donnees stockees en cas de contact sans succes et invalider le selecteur de programmes et le dispositif d'acces sur commande.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU67739/81A AU6773981A (en) | 1980-01-04 | 1980-12-23 | System for remote monitoring and data transmission over non-dedicated telephone lines |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US109624 | 1980-01-04 | ||
US06/109,624 US4361851A (en) | 1980-01-04 | 1980-01-04 | System for remote monitoring and data transmission over non-dedicated telephone lines |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1981002085A1 true WO1981002085A1 (fr) | 1981-07-23 |
Family
ID=22328669
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US1980/001709 WO1981002085A1 (fr) | 1980-01-04 | 1980-12-23 | Systeme de controle a distance et de transmission de donnees sur des lignes telephoniques non specialisees |
Country Status (3)
Country | Link |
---|---|
US (1) | US4361851A (fr) |
EP (1) | EP0055252A1 (fr) |
WO (1) | WO1981002085A1 (fr) |
Cited By (11)
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Cited By (16)
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EP0050451A1 (fr) * | 1980-10-20 | 1982-04-28 | Minnesota Mining And Manufacturing Company | Système de concentration et de collection pour données d'alarme |
FR2516328A1 (fr) * | 1981-11-06 | 1983-05-13 | Thomson Csf Mat Tel | Dispositif d'acquisition, de memorisation et de transmission de donnees a un centre de traitement |
EP0117298A2 (fr) * | 1983-02-25 | 1984-09-05 | TELENORMA Telefonbau und Normalzeit GmbH | Système de contrôle-horaire flexible à l'aide d'un appareil de téléphone |
EP0117298A3 (en) * | 1983-02-25 | 1986-01-02 | Telefonbau Und Normalzeit Gmbh | Control method for flexible working hours using a telephone |
EP0177512A1 (fr) * | 1984-03-26 | 1986-04-16 | A.C. Nielsen Company | Systeme de recherche de marketing preprogramme a transmission he rtzienne |
EP0177512A4 (fr) * | 1984-03-26 | 1986-09-15 | Nielsen A C Co | Systeme de recherche de marketing preprogramme a transmission he rtzienne. |
EP0212654A2 (fr) * | 1985-08-30 | 1987-03-04 | AT&T Corp. | Méthode et appareil pour interdire l'extension d'un appel à travers un réseau |
EP0212654A3 (en) * | 1985-08-30 | 1989-02-22 | American Telephone And Telegraph Company | Method and apparatus for disallowing the extension of a call through a network |
EP0317082A1 (fr) * | 1987-11-20 | 1989-05-24 | General Instrument Corporation | Rapport spontané de données engendrées à distance |
US5012510A (en) * | 1988-04-27 | 1991-04-30 | Scientific Atlantic Inc. | Dynamic callback technique |
EP0363847A1 (fr) * | 1988-10-11 | 1990-04-18 | A.C. Nielsen Company | Système à substitution d'information vidéo par une autre information vidéo |
EP0390666A1 (fr) * | 1989-03-28 | 1990-10-03 | Elf Antar France | Système de surveillance d'installations industrielles |
FR2645304A1 (fr) * | 1989-03-28 | 1990-10-05 | Elf France | Systeme de surveillance d'installations industrielles |
EP0602777A1 (fr) * | 1992-10-20 | 1994-06-22 | Mita Industrial Co. Ltd. | Système pour la gestion d'un terminal et une méthode pour détecter un terminal défectueux utilisant le système |
US5802271A (en) * | 1992-10-20 | 1998-09-01 | Mita Industrial Co., Ltd. | Terminal device management system and a method for detecting a failed terminal device using the system |
GB2330229A (en) * | 1997-10-07 | 1999-04-14 | Digital Detection Systems Limi | Fluid detection system |
Also Published As
Publication number | Publication date |
---|---|
US4361851A (en) | 1982-11-30 |
EP0055252A1 (fr) | 1982-07-07 |
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