HU190145B - Communication system to the automatic connection between mobil and fixed telephon stations - Google Patents

Abstract

The system employs a transmitter and receiver within each mobile unit. A control generator is coupled to the transmitter, a number selection device and a manual change-over switch associated with a microtelephone. The radio link is used to couple the mobile unit to a central station having a receiver and a transmitter and an input number selection device coupled to a selector. - The selector is simultaneously coupled to an exchange circuit and to a timing relay. The output of the relay is also coupled to the exchange circuit. A differential circuit coupled to the exchange circuit has inputs and outputs coupled respectively to the receiver and the transmitter.

Description

FIELD OF THE INVENTION The present invention relates to a communication system capable of automatically establishing a connection between a mobile and a fixed telephone station and used to connect fixed and mobile objects to a fixed telephone station, where the stationary station is connected to an automated telephone exchange of any system.

U.S. Patent No. 4,291,197 discloses a communication system capable of automatically establishing a connection between a mobile and a fixed telephone exchange. This known solution involves a mobile station and a stationary station. The mobile station has a transceiver antenna which is connected to both the transmitter and the receiver. The receiver output is connected to a handset via a low frequency amplifier. The handset output is connected to one input of the transmitter and another input of the transmitter is connected to the control generator. The output of the mechanical dialing unit of the station is connected to a pulse generator on the one hand and to a pulse generator on the other, each of which is connected to a control generator. The handset is connected to the transmitter input via a hand switch. The stationary station is equipped with a transceiver connected to a transmitter and receiver. The receiver output is connected to an input of an output-occupancy unit on an amplifier whose output is connected to the transmitter input. The receiver output is further connected to a control detector and a demodulator. The output of the control detector is connected to the control input of a number selection relay. The terminal contact of the number selector relay is connected to the circuit of the output-to-input occupancy unit. The outbound occupancy unit is connected to an automated telephone exchange interface via a telephone line. The demodulator, control detector and dial selector relay together form an incoming dialer unit.

The above system has the disadvantage that outgoing and incoming dialing depends on radio channel (transmission channel) parameters and radio interference. In addition, the increase in the number of fixed and mobile stations will additionally increase the price of the equipment.

It is an object of the present invention to provide a communications system capable of automatically establishing a connection between mobile and fixed telephone stations and that the outgoing and incoming number response is independent of radio channel parameters and radio interference. A further requirement was that the system be capable of additionally connecting a plurality of orders of a finite number of mobile and stationary telephone stations without increasing the cost of the devices.

The object of the present invention has been solved by means of a communication system which, under the conditions set out in the object, solves the automatic communication between mobile and stationary telephone stations. The communications system of the present invention comprises a mobile and a fixed station. The mobile station comprises a transmitter and a receiver connected to a transceiver antenna, and a control generator output is connected to the transmitter input. The handset of the mobile station has a dialer and a hand switch.

The stationary station of the communications system of the present invention comprises a transmitter and receiver connected to a transceiver antenna, and is provided with an incoming dialer unit, the output of which is connected to an output-to-input occupancy unit.

The mobile station has a target processor whose input is connected to the first and second outputs of the receiver. The third output of the receiver is connected via a selector to an input of the target processor, the fourth output via a clock generator is connected to a control unit and the control unit is connected to a low frequency generator unit. The control generator is connected to the receiver and the clock generator, while the receiver output is connected to the clock generator. The control unit input connects to the handset microphone, toggle switch and dialer. The dialer unit can be made in push button version. The dialer unit is bidirectional to the target processor. The destination processor output is connected to the receiver and the handset listener.

The stationary station is provided with a selector whose input is connected to the output of a synchronization unit connected to the transmitter and the transmitter output. The selector is connected to an incoming dialer unit designed as an analog-to-digital converter and the synchronization unit is connected to the converter. The selector is simultaneously connected to a switching unit and a time relay whose output is connected to the switching unit. The switching unit is connected to a differential circuit whose input and output are connected to the transmitter or receiver. The outputs of the switching unit are connected to an output-to-input occupancy unit and an output number selection processor. It is connected to the output-input occupancy unit by the input of the dialer processor, is connected to the switching unit, and its output is connected to a sound generator. It is also connected to a receiver and a differential circuit whose output is connected to an output-to-input occupancy unit. The stationary station is further provided with a low frequency generator assembly connected to one of the inputs of the differential circuit.

Advantageous features of the communication system for automatic connection of the mobile and fixed telephone stations of the present invention include:

- allows stations to transmit both analogue and digital transmissions,

- eliminates the need for dedicated telephones,

- enable automatic charging of calls both at home and abroad,

- incorporates purely electronic switching elements and allows the station to operate reliably on a standard telephone line with a length of 2x0.6 mm ^1, 20-30 km cross-section.

The invention will now be described in more detail with reference to the exemplary embodiment shown in the accompanying drawings. 1 is a schematic diagram of a communication system according to the invention.

Figure 2 is a more detailed circuit layout of the target processor and number selection processor of the communication system of Figure 1.

As can be seen from the drawing, the communication system for automatic connection of the mobile and fixed telephone stations according to the invention has a mobile station 1 and a fixed station 2 connected to one another via a radio channel. The stationary station 2 is connected via a telephone line 3 to a bidirectional interface unit of an automatic telephone exchange 4.

The mobile station 1 has a receiver 101 and a transmitter 102 connected to a transceiver antenna 103 which are in communication with each other via a control generator 104. The output of transmitter 102 is connected via control clock generator 105 to control unit 106. The control unit 106 is connected to an output of a number selection unit 107. The above output of transmitter 102 is also connected to low frequency generator unit 108. One of the outputs of the receiver 101 is connected via a selector 109 to a destination processor 110, one of which is connected to the handset 111 of the handset 112. The handset 112 is provided with a hand switch 113. The microphone 114 and the hand switch 113 of the handset 112 are connected to a control unit 106 whose output is connected to the transmitter 102.

Stationary station 2 has a receiver 201 and a transmitter 202 connected to a transceiver antenna 203. One of the outputs of the receiver 201 is connected to a voice generator 208 via a selector 204, an analog-to-digital converter 205, an output-input occupancy unit 206, and a call processor 207. The receiver 201 is further connected to the selector 204 and the analog-to-digital converter 205 via the synchronization unit 209. The output of the selector 204 is connected to a switching unit 210 and to a timer 211. The stationary station 2 is provided with a low frequency generator unit 212, the output of which is connected to a differential circuit 213, which is connected to the transmitter 202 on the one hand and to the switching unit 210 bidirectionally.

The stationary station 2 is connected to the telephone line 3 via an outgoing-input occupancy unit 206.

The automatic communication communication system of the present invention consists of a finite number of mobile and stationary stations, for the sake of simplicity, only one of each is shown in the drawing.

Figure 2 illustrates a more detailed circuit layout of the call processor 207. Call processor 207 has the same structure and attachment points as target processor 110, which is therefore not described separately.

The call processor 207 is provided with control blocks In whose outputs are connected to a suitably low voltage switching transistor 21, 22, 2n. The emitters of the switching resistors 21, 22, 2n are connected to the positive terminal 31 of the tear current source, while their collectors are respectively connected to the respective positive low-voltage inputs 411, 421, 4nl. Each storage unit 51, 52, ... 5n is connected to each interface unit 41, 42, ... 4n. The outputs of the adapter units 41, 42 ... 4n are connected to the sound generator 208 in a multiplexed manner.

The operation of the communication system according to the invention in various modes of operation is as follows.

Outgoing Busy

The mobile subscriber to which the mobile station 1 is located presses the start button on the dialing unit 107 and thereby activates the control unit 106, the low frequency generator unit 108 and the transmitter 102. The transmitter 102 then outputs a high frequency signal combination modulated by the signal of the low frequency generator unit 108. If the radio channel is unoccupied, the transmitted signal is transmitted to the receiver 201 of the station 2. The selector 204 controls the switching unit 210 and thereby the output-input busy unit 206.

The incoming dialer unit, i.e. the analog-to-digital converter 205, is then contactlessly negatively energized by the automatic telephone exchange 4 and its bidirectional dialing unit (not shown) and "busy" for calls from the mobile subscriber.

The switching unit 210 turns on the transmitter 202 by means of a call processor 207 for outgoing calls, thus occupying the channel, preventing any other mobile or stationary station from connecting to the automatic PBX 4, unless that station is called.

Incoming azama election

This operating state is created by the mobile subscriber by emitting low-frequency signal corbations in a similar manner to the start combination described above. These combinations are converted by the synchronization unit 209 and the analog-to-digital converter 205 into a fixed number of dialing pulses (dial pulses) in the station 2, the parameters of which comply with the specifications. This pulse sequence is contactlessly transmitted to the bidirectional unit of the automatic telephone exchange 4 and executes the call in the same manner as in a normal stationary telephone exchange.

In the case of a called location subscriber request, the connection is made to the outgoing-input occupancy unit 206 of the station 2, the difference circuit 213, the receiver 201 and the transmitter 202, the mobile station 2 receiver, transmitter 110, target processor 112, handset 112 and control unit 106. is created.

The communications system of the present invention reproduces the conversation of a mobile subscriber in a loudspeaker and a telephone when the handset 113 of the handset 112 is released and the transmitter 102 is turned off, thereby increasing the reliability of the connection under such complicated conditions as the sensitivity of the receiver 101 is increased, which in this case is not burdened by a transmitting signal filter (not shown), and there is no possibility for anyone to intercept the talker's speech in the listener 111.

Interservice or interstate call attempt

In this case, if the proprietary code is not appended, when arriving at the station 2 at the receiver 201, the first pulse sequence on the selector 204 arrives at a charge counter not shown in the drawing, and where the tone selector and the switching unit 210 terminates the connection to the automatic telephone exchange 4. The difference circuit 213 and the transmitter 202 send a stop pulse to the receiver 101 of the mobile station 1, which it shuts off, releasing the channel.

To make a domestic or international call with 1 mobile station, the start combination must be repeated within 5-20 seconds and the first start combination must be made without dialing. For the second start combination, add the caller's number and press the stop combination button on the dialer 107.

The second start combination bridges the switch of the incoming number switching unit (analogue-to-digital converter 205) of the stationary station 2 and instructs the costing processor to enter in its operative memory the number of the mobile subscriber stored in a magnetic storage and connected to a printer. ) and then toggles the switching unit 210 so that the connection is not winded after the first stop signal. After transmitting this stop signal, the mobile subscriber number, already stored in the charge counter processor memory, is transmitted through the differential circuit 213 and the transmitter 202. When the mobile subscriber returns, the subscriber's number is still in the toll counter processor's memory, the incoming dialer, i.e. the bypass in digital-to-analog converter 205, is switched off, the switching unit 210 is again in a state to receive stop signals, and the called line. or in the case of an international caller subscriber application, the toll counter processor is powered on, depending on the number of the called subscriber. At the end of the call, the timer transfers the amount due to the magnetic storage and to the printer. This process takes place after the stop command.

The data stored in the magnetic storage can be processed by a computer, thus eliminating the need to use conventional call counters or call counters.

The mobile subscriber turns on his / her transmitter.

If no signal reaches the receiver 201 of the station 2 within the prescribed time intervals, the selector 204 and the time relay 211 will switch off all the outputs 206 of the output and the input. As a result, the channel becomes free as described above.

Establishing a connection between mobile subscribers.

In this case, the calling mobile subscriber gives a third start pulse within a time interval of 30 seconds, which releases the effect of the second start pulse by turning off the charge counter processor of the station 2. In addition, the third start pulse disconnects the telephone line 3 to the automatic telephone exchange 4 from the output / input occupancy unit 206, to which it applies a negative voltage. This is a "busy signal" for any fixed subscriber who would try to call that fixed subscriber.

The third start pulse, via the switching unit 210, switches the output-input busy unit 206, while the

The output of the analog-to-digital converter 205 is connected to a number selection input of the processor 207 by a contactless switching element. The mobile subscriber dials the number of the mobile subscriber or multiple subscribers you want to call and establishes a two-way or conference call between the stations.

Number Call for Outbound Call Outbound call processor 207 (described in detail in Bulgarian copyright certificate 29,560)

Initial pulse sequences are stored in counting registers individually and then transmitted, after completion of all pulse sequences, without an open collector multiplexer decoder. The unipolar outputs of the decoders are multiplied and connected to low frequency generators. From the first to the aftertaste, the decoders for each pulse sequence are triggered by a dialed number, respectively, by means of a multiphase clock generator, followed by a pause after the last series. Simultaneously with the call, said generator activates a low frequency generator at 400 Hz which serves as a feedback to the calling subscriber.

In the station 2, the sequence of signals received from the voice generator 208 modulates the transmitter 202 via the low frequency generator unit 212 and the differential circuit 213. The signal goes to some mobile subscriber's receivers (not shown), activates their respective selector and target processor, which low-frequency output of the target processor turns on and shuts off the dialing portion of the dialer. Therefore, the called partner cannot call or prevent the conference connection from being established.

Once the selector is on, the target processor transmits to the station 2 through the control unit, the low frequency generator and the transmitter in response pulses. These pulses are transmitted to the receiver 201, the selector 204, and the switching unit 210 and reset the operating memory of the call processor 207 for handling outgoing calls.

In order to protect an already partially established connection, if the called subscriber does not respond, the calling subscriber can reset the memory of the outgoing call processor 207 and have the opportunity to call a new number.

The mobile station is powered up

In the absence of an incoming call (i.e., in standby mode), the clock generator 105 switches the frequency synthesizer or the control generator 104 at different speeds. In-use channels are delayed by 25% longer than the time required by selectors of mobile stations switched on to establish a connection to the system for two complete call cycles. If a signal is received within this time period which activates the destination processor, this signal will stop the channel skipping on the switched channel and retain it when the mobile station is off on the low frequency channel. Channels that are out of service are crossed by the station much faster.

Occupancy with incoming call

The mobile station quickly crosses the busy channels after the number dialing unit 107 transmits a start pulse to the clock generator 105 via the destination processor 110. As soon as the first free channel is reached, the stepping stops and emits a start pulse. In this way, the connection is partially established.

Outgoing Busy

The stationary subscriber of the automatic telephone exchange 4 is paired to a mobile subscriber or group of mobile subscribers, the "land" of the outgoing / incoming busy unit 206 being fixed when the outgoing call handling processor 207 is connected to the busy unit 206 and the outgoing processor 207 taxes. Dialing is the same as when dialing a mobile subscriber.

The target processor 110 of the mobile station 1 provides the necessary protection against partial electromagnetic incompatibility within the radio channel, preventing the low frequency output of the receiver 101 from being triggered by call combinations that originate from the station and differ in structure from the subscriber code combination.

In the case of digital transmission, the station 2, the receiver 201 and the transmitter 202 are configured to accommodate a plurality of digital transmissions (pulse code modulation or other types of digital transmission) the remaining units of the stationary station 2 are multiplied by the number of channels of the digital device. As a result, the number of radio stations is reduced (n-1) times.

The transmitters and receivers of each of the mobile and stationary stations in the system are configured according to the type of connection chosen and the like.

Claims (1)

A patent claim Communication system for automatic connection between mobile and stationary telephone stations having a mobile station and a station with a transmitter and receiver connected to the transceiver antenna of the mobile station, a transmitter connected to a transmitter control generator, a number switching unit, a transmitter stationary transmitter, and a receiver, its output being provided with an incoming sleeper unit connected to an output-input occupancy unit, characterized in that the mobile station (1) is provided with a target processor (110) to which the first and second outputs of the receiver (101) are connected; 101) its third output winds through a torus (109) to one of the inputs to the target processor (110) and a fourth output via a clock generator (105) to a control unit (106) which is connected to a low frequency generator unit (10). 8) is connected and the control generator (104) is connected to the receiver (101) and the clock generator (105), and the output of the transmitter (102) is connected to the clock generator (105) and the control unit (106) 10 edges (112) are connected to a microphone (114), a hand switch (113) and a push-button dial unit (107), and bidirectionally to a destination processor (110) having outputs to a receiver (101) and a handset (112) for listening (111). ), and the stationary station (2) is provided with a selector (204) whose outputs are connected to a receiver (201) and a synchronization unit (209) connected to one of the outputs of the receiver (201) and a selector (20). 204) is connected to an incoming call unit, configured as an analog-to-digital converter (205), and one of the outputs of the synchronization unit (209) is connected to the analog-to-digital converter (205) and a selector (204) connected to both a switching unit (210) and a timing relay (211), the output of which is coupled to the switching unit (210) associated with the differential circuit (213), and the output and input to the transmitter (202) and connected to the receiver (201) and outputs of the switching unit (210) to an outgoing-to-busy occupancy unit (206) and an outgoing call handling processor (207) having an input to an outgoing-to-busy occupying unit (206) associated with the switching unit (210). with its output connected to a sound generator (208), to a receiver (202) and to a difference circuit (213) which is connected to its output-to-input occupancy unit (206) and to a low frequency generator unit (212) to one of the inputs of the difference circuit (213).