WO1988006385A1 - Transmission et reception de donnees - Google Patents

Transmission et reception de donnees Download PDF

Info

Publication number
WO1988006385A1
WO1988006385A1 PCT/AU1988/000049 AU8800049W WO8806385A1 WO 1988006385 A1 WO1988006385 A1 WO 1988006385A1 AU 8800049 W AU8800049 W AU 8800049W WO 8806385 A1 WO8806385 A1 WO 8806385A1
Authority
WO
WIPO (PCT)
Prior art keywords
code
transmitter
receiver system
transmission
control circuit
Prior art date
Application number
PCT/AU1988/000049
Other languages
English (en)
Inventor
Simon Leivenzon
Raymond Russel Hawkins
Christopher J. Mason
Original Assignee
Zeeng, Pauline
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 Zeeng, Pauline filed Critical Zeeng, Pauline
Publication of WO1988006385A1 publication Critical patent/WO1988006385A1/fr

Links

Classifications

    • 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
    • H04W88/18—Service support devices; Network management devices
    • H04W88/185—Selective call encoders for paging networks, e.g. paging centre devices
    • H04W88/187—Selective call encoders for paging networks, e.g. paging centre devices using digital or pulse address codes
    • G—PHYSICS
    • G08—SIGNALLING
    • G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
    • G08C19/00—Electric signal transmission systems
    • G08C19/16—Electric signal transmission systems in which transmission is by pulses
    • G08C19/28—Electric signal transmission systems in which transmission is by pulses using pulse code

Definitions

  • This invention relates to transmission and reception of data and relates particularly, but not exclusively, to apparatus for use in radio controlled garage door systems, radio controlled security systems, radio controlled paging systems and other like radio controlled systems.
  • the transmission can be by using electrical signals, electromagnetic signals, acoustic signals, pneumatic or hydraulic signals or mechanical signals and all are to be considered within the scope of the invention. Description of Prior Art
  • a multiple number of transmitters can be matched or correlated to a single receiver and individual recognition given to different ones of the transmitters used. This is usually achieved by having a plurality of different codes obtained by different DIP switch groups at the receiver. In the paging arts there is usually only one transmitter and many receivers and the configuration is such that particular receivers can identify a signal intended therefrom and disregard signals for other receivers. This matching or correlation of transmitters to receivers and receivers to transmitters is similarly provided by the use of DIP switches to generate codes in the transmitter signal which are subsequently matched or correlated and recognized by the respective receiver.
  • DIP switches Selection of the appropriate coding by use of DIP switches is regarded as not being particularly secure and moreover is troublesome in use.
  • DIP switches When DIP switches are employed it is possible for a person intending to break security to open the back of a transmitter or receiver and note the physical configuration of the DIP switches. By having a corresponding transmitter or receiver it is possible to adjust the DIP switches so that they match. This, in turn, allows for unintended matching or correlation of transmitters and receivers. Hitherto, it has been necessary, when manufacturing a transmitter system, to provide dedicated circuit components in the transmitter for providing the necessary codes to the transmitted signal. In the receiver system it* has been necessary to provide further dedicated code matching or correlation circuitry.
  • a pulse output is where the output changes state only for a predetermined time.
  • a toggle output is where the output state changes and stays in that stated until next changed.
  • a hold output is where the state changes to that in a received state, and where it is held until next changed.
  • a flash output is where the output changes state at a controlled rate.
  • a control circuit for use in either a transmitter system to permit communication of the status of one or more input port of said control circuit to a receiver system, or with a receiver system to permit data information signals received from a transmitter system transmitting such signals to one or more output port, where the one or more output port will have desired output characteristics
  • said control circuit comprising a central processing unit and a memory means therefor, said memory means being programmable, in the case of use with a transmitter system, to store communication parameters so thai ⁇ during a transmission communication parameters will be supplied to the transmitter system with data representative of the status of said one or more input port, and in the case of use with a receiver system, to store communication parameters and desired output port characteristics of said one or more output port, so that upon reception, any communication parameters
  • a transmitter receiver system combination where identification of codes in a received transmission is to be made before data can be passed at the receiver system
  • said transmitter system comprising code generating means for providing code signals to a transmitted signal, said receiver system having memory means for storing a code of a transmission to be received, comparing means for comparing a received code with the stored code and processing means for permitting data in said transmission to be acted upon if there is a code match or correlation, said code generating means having a user activatable random automatic generating means which can be activated to provide a user generated code, memory means for storing the code generated and for transmitting that code in any transmission, said receiver system having means activatable to permit said memory means to record the code in a received transmission.
  • a transmitter receiver system combination where identification of code in a received transmission is to be made before data therein can be acted upon at the receiver system, said transmitter system providing code signals to a transmitted signal, said receiver system having memory means for storing part of a code of a transmission to be received, comparing ' means for comparing a received code with a stored code and means for permitting data in said transmission to be acted on if there is a code match or correlation, said transmitter system having at least two separate sub codes provided in said code in a transmission, at least one sub code of which is useable to define a characteristic of the transmitter system (Mfg code) whilst the other sub code is a code to identify the transmitter system.
  • Mfg code characteristic of the transmitter system
  • FIG. 2 is a block schematic diagram of a typical transmitter system
  • Figure 3 is a block circuit diagram of a typical receiver system
  • Figure 4 is a block circuit diagram of a typical programming circuit for use with a personal computer for programming a memory device in the control circuit
  • Figure 5 is a programming menu displayed on a personal computer screen for programming a memory device which is within the control circuit;
  • Figure 6 is a view of a pin configuration of an integrated circuit used; and Figure 7 is a listing of mask options for an integrated circuit. Detailed Description of Preferred Embodiments
  • the control circuit which is described can be connected with either a transmitter system or a receiver system or alternatively it can be connected to control both a transmitter system and a receiver system so that DUPLEX transmission and reception can occur.
  • the control circuit is such that it permits the status of input ports at the transmitter system to be transmitted to the receiver system where the status of those ports can be applied to output ports on the receiver system. How the status at the output ports is interpreted is entirely up to a user's discretion. For example, the status at the output ports can be used to provide alarms or to cause certain events to occur. In a door operator environment, it can cause a door to be opened or closed. In a paging environment it can cause a paging signal to be announced.
  • the control circuit has code generating means and code recognition means so that in the case of a transmitter system , appropriate codes can be provided in the transmission for identification by a receiver system.
  • the code recognition means permits only signals from a transmitter system matched or correlated to it, to be identified and processed.
  • Several sub codes are provided and some of these are fixed and cannot be adjusted by a user whereas at least one sub code can be adjusted by a user. This will give the user security or unique identification.
  • the code which provides the unique identification is termed "a unique code" and is provided either by a fixed code which can be set at a factory where the control circuit is manu actured, or it can be replaced with a user generated unique code.
  • the factory code is still stored and can be recalled.
  • the user generated code is provided by a psuedo random number generator at the transmitter system and the code is obtained by the time or duration of operation of a code switch at the transmitter system.
  • the transmitter system can be controlled by the control circuit to either transmit code in a burst mode or a continuous mode.
  • a continuous mode is where a transmission continues for the time that a transmit button or switch is operated.
  • a burst mode is where a burst of code signals can be repeated for a preset number of times following activation of the transmit button.
  • the burst mode is typically useful for personal security devices in elderly person's homes because it can provide a burst of say six repeated code transmissions even through the transmit button has been pressed or operated only once and released prior to the transmission being completed.
  • the receiver system is able to be configured by the control circuit to provide outputs, upon matching or correlating various codes in a transmission with those which are memorized at the receiver system, which will either be high or low output signals.
  • This permits the transmitter system to interface with particular ' equipment without the requirement for intervening or intermediate electronic circuit components to provide the required signals.
  • the transmitter system can be provided to give a high output signal upon receipt of code matching or correlation so that the outputs can drive LEDs or relays or other devices. Alternatively, the output can be made to go low to drive appropriate devices.
  • the control circuit can configure the outputs to either a pulse output, a toggle output, a hold output or a flash output. Each one of the output ports of the receiver system can be individually programmed to provide any one of these characteristics .
  • FIG. 1 there is shown a break-down of the transmitted signal from a transmitter system to a receiver system showing how 80 bits therein are broken up to provide discrete sections of a transmitted signal.
  • the transmitted signal is sent at 1200 baud, 8 data bits, no parity and 1 stop bit. The same format is used for inputs to the receiver system.
  • the transmission consists of the following code which has sub codes therein as follows:- 1. PREAMBLE;
  • These 24 data bits are used to initialize the receiver system and comprise a sequence which is AAFF95 (101010101111111110010101).
  • the receiver system when receiving a transmitted signal looks for the alternate Is and 0s followed by at least 7 consecutive Is after which the receiver system timing is synchronised with the "95" byte, which functions like a start bit for a UART.
  • the check word is an 8 bit word formed by adding together all of the data in the subsequent fields .
  • the receiver system records the check word as it arrives and calculates its own check word from the data. At the end of reception the two check sums are compared to determine if an error has occurred during transmission.
  • the control circuit is such that it will only take action to provide the required outputs at the output ports if the check sums compare.
  • the processor does no clear carry except on the last time through the loop and this influences any code generated.
  • a special code can be used to distinguish between a hand held transmitter system used in a motor vehicle and a transmitter system which is mounted at a remote location within a house. It can also be used to permit different interpretations of the data for other devices connected to receiver system and transmitter system which do not generate the same format and work with the same formatted signals.
  • the control circuit When the control circuit is fitted in a transmitter system these 8 bits are read from the 8 input ports . They represent the inputs to the transmitter system which are to conveyed to the receiver system. As a receiver system, they are the bytes that will be used to update the output status of the output ports. It should be noted that the ports are bi-directional and can be used as output and input ports concurrently. This has particular significance if the control circuit is connected with both a transmitter system and a receiver system as it can permit DUPLEX transmission and reception in either a broadcast mode or poll mode. In the transmit mode the ports have to be complemented (have high outputs) but in a receiver mode they can be either high or low outputs, i.e. complemented or high. This permits the control circuit to be interfaced with any desired devices that should require power ON or power OFF to change their states.
  • This code comprises 24 bits and can be either a factory determined code, i.e. one which is provided at the factory where the control circuit is manufactured and/or it can comprise an automatic user generated code in the transmitter system. Pin states at power ON determine which one of the factory code or the user generated code are inserted.
  • the user generated code is obtained by a psuedo random number generator using a seed, either the last random code or a stored number.
  • the receiver system is caused to compare the transmitted code and the manufacturing code with values obtained from a memory means to verify that the transmission signals contains all the relevant data.
  • This code comprises 7 bits and permits a large number of different manufacturing codes to be provided by appropriate selection of the bits being either high or low.
  • the code is programmed identically into each part used by any one particular manufacturer or one particular user environment such as a garage door operator or a paging device or a security device. This code enables the transmitter/receiver system combinations for different manufacturers and/or different environments of use of the transmitter/receiver system to-not be subject to cross-communication between the systems.
  • the manufacturer's code is a fixed code which is programmed at a factory prior to despatch of the control circuit.
  • FIG. 2 and 3 there is shown a block schematic diagram of a transmitter system and a block schematic diagram of a receiver system respectively using a National Semiconductors COPS central processing device 1 type COP426C - known as FDl - and an EEPROM memory device 3 type NMC9306.
  • the EEPROM device 3 is programmed to control FDl to provide either transmission of the desired code or reception and decoding of the desired code.
  • a transmitter system 5 of conventional form is arranged to process data and code from the FDl device 1. It is noted that there is provided a transmitter switch 7 and a code switch 9 in the transmitter circuit. In the receiver system there is provided a receiver circuit 8.
  • a code switch 9 is provided in the receiver system circuit .to enable codes to be recorded in EEPROM device 3 therein.
  • FDl device 1 is a mask programmed micro-controller which provides remote control for one of up to eight possible devices which can each operate in the environment shown and be recognized as matched or correlated devices . This is obtained by appropriate strapping of terminals L Mon - L 7 of FDl device 1 in the transmitter system.
  • the FDl device 1 is used with the EEPROM 3 which contains a configuration word and a unique identifying number which is transmitted with each command. The configuration word controls whether the FDl device 1 is a transmitter system, a receiver system, in either DUPLEX mode or SIMPLEX mode, and whether the transmitter sends a burst of code or continuous code.
  • a burst of code is meant that a code is repeated say only six times as distinct from being- repeated over and over as in continuous mode.
  • the initial contents of the configured word and unique code are programmed into the EEPROM at production from a computer using standard 1200 baud RS232 interface.
  • the pin configuration of FDl is shown in Figure 6.
  • the mask options for the FDl are shown in Figure 7.
  • Factory Programming of EEPROM Factory programming of the EEPROM 3 is achieved by connecting the Serial IN and Serial OUT pins to the serial port of a personal computer via a required level converter circuit.
  • a program connector 11 is shown in Figures 2 and 3 for this purpose and this is connected via a programming circuit shown in Figure 4, to the personal computer.
  • the personal computer controls links between SI and SO and across a code switch 9 to enable programming mode. All communication is at 1200 ba d, 8 data bits, no parity and one stop bit.
  • the DUMP commands sends 32 bytes of data from the NMC9306 EEPROM to the personal computer.
  • the LOAD command expects 32 bytes of data to write to the EEPROM. After every second byte, a 25 millisecond delay is required to allow for the programming time of the EEPROM. After executing a LOAD, a DUMP should be executed to verify the data.
  • the programming sequence under control of the personal computer is:
  • the EEPROM contains 32 bytes allocated as shown in the.following sub-sections.
  • bit 1 burst transmission, as defined by bits 4-7 of byte 2.
  • bit 1 POWER.
  • D2 is high whenever transmitting.
  • bits 2 & 3 COMMAND. Used to identify the type of transmitting device, bit 4 : COMPLEMENT.
  • each bit of byte 3, and the corresponding bit of byte 4 determine the kind of output generated at one of the port output pins when a valid command with a one in the corresponding bit position is received. Note that the bit order is reversed so that bit 0 of bytes 3 and 4 controls bit 7 of the port.
  • bit 7 1 in transmitters.
  • FIG. 5 there is shown a screen which is displayed on a personal computer used when programming the EEPROM device 3.
  • Figure 7 is basically self-explanatory and shows the various options possible to program ' the EEPROM memory device 3.
  • the left hand side has a vertical column representing the function which is to be controlled.
  • the first item is Programme Control.
  • the options available are either to burn the EEPROM and/or to exit.
  • the programming functions do not start at program control, but rather at the next - "ROW MANUFACTURING CODE". It can be seen that the input value can be from any value between 0 and 127.
  • the "FACTORY CODE” is the next row and can be from any value between 0 and 16777215.
  • the next row is "MODE” where the EEPROM memory device 3 is programmed to co-operate with either a transmitter system or a receiver system or for DUPLEX operation in a broadcast mode or a poll mode.
  • the next row is for "POWER CONTROLS" and the options are EEPROM or carrier.
  • the next row is for "COMMAND" where either a 0, a l, a 2 or a 3 r giving four possible options, are provided. This option corresponds to the command code in the transmitted signal. Such enables four different input device recognition capabilities to be provided so that it is possible during use to distinguish from where a received signal is coming from, i.e. from which transmitting system device.
  • the next row is the "DATA". The options are true or complemented. In a transmit mode the ports L Q - L-- have to be complemented (high outputs). In a receiver the ports can be either high or low (complemented or high outputs). The next row is
  • the "TRANSMISSION TYPE” and the options are continuous or burst. In the continuous mode a transmission continues as long as a transmit button is operated. In the burst mode a transmission will continue for a selected number of blocks of bursts as determined in the next row options. These will continue even though the transmit button may be been released.
  • the "BURST BLOCKS” row sets the number of times that the transmission is to be repeated.
  • the next row is the "RECEIVER TIMEOUT” and it can be seen that a timeout option of from 0.5 to 2 seconds can be obtained. This sets the time that the receiver system times out and in which it cannot receive a further incoming transmission.
  • the next series of rows represent the output ports L Q - I,- but are displayed only when the EEPROM memory device 3 is programmed to be a receiver. It can be seen that up to eight of the ports can each be separately programmed to pulse, toggle, hold or flash.
  • the computer When the options have been selected the computer is returned to the first row so that the EEPROM can be burnt in accordance with the programming which has been set or alternatively the programming can be exited.
  • the EEPROM memory device When the EEPROM memory device is burnt, the EEPROM data is displayed in the "VERIFIED ROW", and the configuration word representative of the data is displayed in the "CONFIGURATION WORD" row. This can be recorded for record purposes if required.
  • the FDl When power is applied the FDl will send a code sequence on the G_ (Serial OUT pin). If the BURST bit is set in the configuration word, the sequence will be sent the number of times specified in the configuration word, otherwise continuously. Data is sent at 1200 baud, 8 data bits, no parity and one stop bit. The data will be complemented if specified in the configuration word. This allows use of strapping connected to ground L_ - L 7 . The inputs have pullup resistors on the chip. The L port will be driven low at power on until the program outputs all highs to enable the low current pullups. No device capable of sourcing current should be connected to the L port. Inputs should be driven from switches or open collector drivers to ground only. ⁇ .
  • the sequence will comprise:
  • An initial random number can be loaded in the factory using the LOAD command and this will be used as a seed in the psuedo random number generator. 5
  • the receiver system When the receiver system receives a signal it checks for a preamble code. It then reads a complete code sequence and tries to validate it. Validation comprises first comparing the codes with the check word 0 and then the unique code with each of seven codes which may be stored in the receiver EEPROM and represent seven different transmitter systems which can be correlated to the receiver system. It is extremely unlikely that the receiver system will validate a wrong or corrupted code. 5 Part of the transmission is a check word which is calculated from all the data and 32 bits of ID codes. The receiver system calculates a check word based on the data and ID codes that it receives and compares it with the check word received. The codes received are not validated unless the check words match.
  • the outputs L ⁇ to L 7 are set according to the mode set in the EEPROM. If desired the outputs L» to L-, can be sent to a line decoder so that up to 356 channels can be recognised. To implement any of these channels, appropriate combinations of L_ to L-, need to be suitably strapped. If during a continuous transmission some of the data bits change then the corresponding outputs will change also. The updated output status will be complemented if specified in the configuration word. In some applications (e.g. toggle mode) it is important that the output turns on only once during a transmission and does not pulse up and down if reception is poor or interference is high. To prevent this, the receiver system samples data five times during each bit of the data and uses the average value.
  • Transient noise is unlikely to coincide with three or more of the five samples and corrupt the average.
  • a valid code condition is set in the program for a period set by the selected timeout value in the EEPROM 3, 0.5 to 2 seconds. If invalid or corrupted code is received during this timeout period the outputs will not change. To maintain steady outputs it is only necessary to receive about 1 in 8 codes depending on the timeout value .
  • the code switch 9 is down at power on, all 7 possible codes in the EEPROM 3 are cleared and new codes may be added as described below. If the code switch 9 is pressed whilst the receiver system is running, new codes can be added to the EEPROM without clearing the old ones. If the EEPROM 3 is full (7 codes) no new codes will be added and no old ones lost.
  • the receiver system is connected to the G, pin of FDl and the transmitter system to the G 2 pin of FDl.
  • the FDl can be programmed to work both in a transmitter system and in a receiver system. It must be configured for burst mode and complemented data so that the inactive output state is high, the same as the pullups on the inputs.
  • the 8, 10 pins can be used independently as inputs and outputs and connected to a respective receiver system and a transmitter system. If an output is active (low) it will be momentarily pulsed high (pullup state) to read the shared input.
  • a pin can have a switch to ground and a LED driver connected to it. Although the LED drive will be pulsing off to read the switch it is so fast as not to be visible. Care should be taken when driving logic. The LED will be turned on whenever the switch is on due to the common pin connection.
  • the transmitter system will send a burst at power on, whenever any input state changes and as an acknowledgement after a valid code is received.
  • the code switch functions are the same as the transmitter mode.
  • the receiver will update the output port whenever a valid code is received in the same manner as received mode except that only the selected unique code (factory or random) is used in the code comparison.
  • the receiver mode code switch functions are not used.
  • the functions are the same as broadcast mode except that polling is only initiated on reception of a valid code by the receiver.
  • This mode is best suited to a private link network such as Bi-Line power line link (see National Semiconductor Bi-Line devices) where a master controller can poll each duplex slave for its status and update its output port as desired. Due to the regular polling it uses too much bandwidth for an RF link but does not suffer from the possibility of a collision or interference from obscuring a status broadcast.
  • the same integrated circuit components can be employed both in a transmitter system and a receiver system and/or that a single integrated circuit components can be employed in a receiver/transmitter system for DUPLEX operation and suitably programmed by a factory as to the intended end use.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Selective Calling Equipment (AREA)

Abstract

Le circuit de commande décrit (1, 3) est destiné à être utilisé soit dans un système émetteur (Fig. 2) permettant de communiquer à un système récepteur l'état d'un ou de plusieurs points d'entrée (L0-L7) dudit circuit de commande (1, 3) soit avec un système récepteur (Fig. 3) permettant la transmission vers un ou plusieurs points de sortie (L0-L7) de signaux d'information de données provenant d'un système émetteur, le ou les points de sortie présentant les caractéristiques de sortie désirées. Le circuit de commande (1, 3) comprend un processeur central (1) et une mémoire (3) pour ledit processeur, mémoire qui est programmable dans le cas d'une utilisation avec un système émetteur, pour stocker des paramètres de communication qui en mode d'émission seront acheminés vers le système émetteur avec des données représentatives de l'état dudit ou desdits points d'entrée (L0-L7) et, dans le cas d'une utilisation avec un système récepteur, pour stocker des paramètres de communication et les caractéristiques désirées du ou desdits points de sortie (L0-L7) de sorte que, en mode de réception, tous les paramètres de communication reçus seront vérifiés et comparés avec les paramètres de communication stockés et, si une correspondance ou une corrélation est établie, ledit ou lesdits points de sortie (L0-L7) fourniront des informations de données émises dans les caractéristiques de points de sortie désirées. La transmission utilise des codes et un système récepteur peut être mis en correspondance ou en corrélation avec un système émetteur par stockage des codes demandés dans une mémoire (3) du système émetteur. Les codes comprennent un code fixe et un code modifiable par l'utilisateur qui sert à identifier un système émetteur particulier.
PCT/AU1988/000049 1987-02-23 1988-02-23 Transmission et reception de donnees WO1988006385A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AUPI0486 1987-02-23
AU48687 1987-02-23

Publications (1)

Publication Number Publication Date
WO1988006385A1 true WO1988006385A1 (fr) 1988-08-25

Family

ID=3691237

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/AU1988/000049 WO1988006385A1 (fr) 1987-02-23 1988-02-23 Transmission et reception de donnees

Country Status (2)

Country Link
EP (1) EP0348414A4 (fr)
WO (1) WO1988006385A1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0454537A1 (fr) * 1990-04-27 1991-10-30 Thomson-Csf Procédé de codage pour système anticollision pour la navigation maritime
EP0513688A1 (fr) * 1991-05-09 1992-11-19 Samsung Electronics Co., Ltd. Méthode et dispositif de contrôle pour une machine à laver
US7219754B2 (en) 2001-10-26 2007-05-22 Dane Industries, Inc. Hospital bed power-assist
WO2008020273A1 (fr) * 2006-07-11 2008-02-21 Freescale Semiconductor, Inc. Récepteur destiné à recevoir au moins deux types de signaux, système de communication de données et véhicule équipé du récepteur
US7389836B2 (en) 2003-09-23 2008-06-24 Dane Industries, Inc. Power-assisted cart retriever with attenuated power output
US9010771B2 (en) 2009-11-10 2015-04-21 Dane Technologies, Inc. Utility machine with dual-mode steering

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3906348A (en) * 1973-08-20 1975-09-16 Chamberlain Mfg Corp Digital radio control
US4037201A (en) * 1975-11-24 1977-07-19 Chamberlain Manufacturing Corporation Digital radio control
US4075564A (en) * 1975-04-28 1978-02-21 Autophon Aktiengesellschaft Selective calling arrangement
AU7845481A (en) * 1981-01-14 1982-07-22 Honeywell Inc. Access control card
AU8781282A (en) * 1981-09-08 1983-03-17 Portaphone A.G. Telecommunication system
US4517561A (en) * 1982-07-28 1985-05-14 Motorola, Inc. Selective call, paging and priority signalling system

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4529980A (en) * 1982-09-23 1985-07-16 Chamberlain Manufacturing Corporation Transmitter and receiver for controlling the coding in a transmitter and receiver
IT1183797B (it) * 1985-04-04 1987-10-22 Mario Turatti Dispositivo di comando di mezzi attuatori montati su un veicolo

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3906348A (en) * 1973-08-20 1975-09-16 Chamberlain Mfg Corp Digital radio control
US4075564A (en) * 1975-04-28 1978-02-21 Autophon Aktiengesellschaft Selective calling arrangement
US4037201A (en) * 1975-11-24 1977-07-19 Chamberlain Manufacturing Corporation Digital radio control
AU7845481A (en) * 1981-01-14 1982-07-22 Honeywell Inc. Access control card
AU8781282A (en) * 1981-09-08 1983-03-17 Portaphone A.G. Telecommunication system
US4517561A (en) * 1982-07-28 1985-05-14 Motorola, Inc. Selective call, paging and priority signalling system

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP0348414A4 *

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0454537A1 (fr) * 1990-04-27 1991-10-30 Thomson-Csf Procédé de codage pour système anticollision pour la navigation maritime
FR2661536A1 (fr) * 1990-04-27 1991-10-31 Lmt Radio Professionelle Procede de codage pour systeme anticollision pour la navigation maritime.
US5210534A (en) * 1990-04-27 1993-05-11 Thomson-Csf Encoding method for anti-collision system for sea navigation
EP0513688A1 (fr) * 1991-05-09 1992-11-19 Samsung Electronics Co., Ltd. Méthode et dispositif de contrôle pour une machine à laver
US7219754B2 (en) 2001-10-26 2007-05-22 Dane Industries, Inc. Hospital bed power-assist
US7389836B2 (en) 2003-09-23 2008-06-24 Dane Industries, Inc. Power-assisted cart retriever with attenuated power output
WO2008020273A1 (fr) * 2006-07-11 2008-02-21 Freescale Semiconductor, Inc. Récepteur destiné à recevoir au moins deux types de signaux, système de communication de données et véhicule équipé du récepteur
US9010771B2 (en) 2009-11-10 2015-04-21 Dane Technologies, Inc. Utility machine with dual-mode steering

Also Published As

Publication number Publication date
EP0348414A4 (en) 1990-12-05
EP0348414A1 (fr) 1990-01-03

Similar Documents

Publication Publication Date Title
US4517561A (en) Selective call, paging and priority signalling system
US5684828A (en) Wireless data module with two separate transmitter control outputs
US6956460B2 (en) Transmitter for operating rolling code receivers
EP0787875A2 (fr) Emetteur-récepteur portable à retard de phase pour un système d'entrée sans clé dans un véhicule
US5642350A (en) Peer to peer network for a mobile radio transceiver
AU1821883A (en) Data signalling system
US4594591A (en) General purpose data control terminal
US5559499A (en) Receiver for the reception of wirelessly transmitted information
WO1990002458A1 (fr) Procede pour configurer a distance un modem
EP0651119A1 (fr) Emetteur destiné à un ensemble de dispositifs de commande à distance
EP0932737A1 (fr) Procede permettant d'apprendre des codes d'emetteur a des recepteurs eloignes
CN102804720A (zh) 集成了用于车辆的双向无线接口的通用无线可训练收发机单元
WO1988006385A1 (fr) Transmission et reception de donnees
JP2000261866A (ja) 遠隔装置トリガ用ページングまたは衛星ページングの使用
US20030193448A1 (en) Transmitter for operating rolling code receivers
WO1996036953A1 (fr) Commande sans fil et sure d'equipement electrique
CA1214219A (fr) Systeme de controle de donnees tout usage
AU3966089A (en) Cordless telephone
EP0701336B1 (fr) Système de communication sans fil et station à utiliser dans celui-ci
US5363409A (en) Method and system for multiplexed data transmission from hazardous environments
KR100705191B1 (ko) 양방향 통신 기능을 가지는 원격 제어 장치 및 그 제어방법
JP3197415B2 (ja) コマンド通信方式
CN111243136B (zh) 一种智能锁控制系统
JPH06276180A (ja) ワイヤレス送受信装置
EP0528572B2 (fr) Appareil pour le cryptage et le decryptage de signaux

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): AU JP US

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): AT BE CH DE FR GB IT LU NL SE

WWE Wipo information: entry into national phase

Ref document number: 1988902079

Country of ref document: EP

WWP Wipo information: published in national office

Ref document number: 1988902079

Country of ref document: EP

WWW Wipo information: withdrawn in national office

Ref document number: 1988902079

Country of ref document: EP