DE2215123A1 - Movable or mobile radio system - Google Patents

Description

did: · ntan walte

DIPL-ING. GÜNTHER KOCH ¹ ^ * 9h Dr. Mr

DR. TINO HAIBACH

2 8th HRZ. 1972

8 MONKS 2

Kaufingerstraße 8 Telephone 240275 Area code 0811

Televerkete Gentralfttrvftltning, F a r β t a,

(Sweden)

Movable or mobile radio system

The invention relates to a movable or drivable Radio system with a (fixed) base station and a Number of movable or mobile units »To establish a radio link» with the base station is every © movable unit with devices versefeQK that when actuated an initiation or initiation signal to di @ Basis « station transmitted which · a responsive to the initiation signal Device has * When receiving an egg »-. control or initiation signal from a mobile unit Transmits the device responding to the initiate signal in the base connection «signals« which the mobile unit in radio communication with the base station bring.

The use of radio links for the purposes of transport management and work organization is constantly increasing, so that more and more companies with relatively few vehicles have to share an RF frequency; from the point of view of traffic control this is possible _c since each vehicle on average uses less than 1 #

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the tent takes up and most companies less own twenty vehicles.

So far, however, the procedure has been that each Company owns its own base station, which leads to inconveniences such as overlaps and overlaps due to simultaneous transmission and the like has led

The present invention specifically aims to provide such a mobile or mobile radio system, in which these problems are solved and which enables excellent traffic coordination with effective use of the common RF frequency.

According to the basic idea of the present invention, the hitherto for the * individual, on the same RF frequency working companies separate base stations into one common base station summarized. The invention enables the creation of a well-functioning overall system with a very simple structure.

For this purpose it is provided in a radio system of the type mentioned according to the invention that the mobile Units are divided into groups and each group has its own initiation or InItilersignal in the form of a first group code signal is assigned that the Initiation signal responding device in the Baslsstation upon receipt of the first group code signal from a wheeled unit of a certain group of wheeled units a second corresponding to the first group code signal Group code signal that all mobile units of the

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concerned group in a receiving state offset, as well as after the transmission of this second group code signal transmits a disconnection or termination signal that puts the disconnection in the receivable state Units of the relevant group of mobile units causes, and that in each mobile unit that device which can be actuated to transmit the initiation signal, in connection with the transmission of the first group code signal a Blocking of the mobile unit in question against the receipt of the separating or closing signal has the effect that the mobile unit within the group from which the first group code signal has gone out, remains in the receivable state, while all others mobile units of the group concerned are switched off by the final or separating signal.

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In the following, exemplary embodiments of the invention are described with reference to the drawing; in this show t

Fig. 1 is a block diagram of a base station;

Fig. 2 is a block diagram of a drivable or movable one Devices; which can be connected to the base station from FIG.

In Fig. 1, a number of office units is symbolized by their corresponding office equipment EA., EAp * ·· SA · Each such office or company unit can be mobile or mobile with its associated group Connect units via the base station. The office units are already existing with the base station Lines connected and arranged close to the base station or separated from it. In the latter case the connection is expediently carried out via the subscriber lines of the telephone system.

Every office unit. can connect to their group of mobile or mobile units by operating the relevant office equipment EA; by this actuation, a marking is registered in a memory, namely the first memory M ₁ .

If the common channel is unoccupied in this case, a _{device A connected to the memory M 1} responds immediately to this marking and excites a tone generator or transmitter TS, whereby the transmitter SS of the base station via a fork connection G with a

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The relevant marking, ie tone code representative of the group of mobile units belonging to the office unit in question, is modulated. The device A also operates a selector switch V in such a way that the office unit in question is connected by the selector switch to the fork connection G and the transmitter FS * The tone code by which TS modulates the transmitter PS sounds in the office unit and serves as a display to the office unit that the RF channel is unoccupied and the connection is established. To inform the mobile units concerned when establishing the connection and at the same time to inform the mobile units of the other groups that the channel is busy, TS also modulates the station's transmitter FS with a special signal SI ₁ *

If, on the other hand, the RF channel is busy when the relevant marking is registered in the memory M when the office equipment in question is operated ₉ , a speaking time limiter Bj is excited by a waiting or waiting registration _{device K 1} , which is also connected to the memory is * The speaking time limiter causes on the one hand that TS modulates the transmitter FS with an attention signal for activated mobile units, to indicate for them that the connection will be interrupted after a predetermined time} on the other hand, the speaking time limiter causes a deletion of the registration, which initiated the currently activated connection, whereupon device A automatically responds to the next marking after the deletion. A connection is then established in the same way according to the last-mentioned marking.

The tone code transmitted by the transmitter FS contains in

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in all cases, on the one hand, a share specific to the mobile units in the relevant group (group code), on the other hand, a terminator or separator that is the same for the mobile units of all groups, and finally, if the office wishes contact with a single wheeled unit within the group, one for each Mobile unit within the group specific share (individual code).

As can be seen from Fig. 2, the equipment has a sound receiver TMN for each mobile unit. The receivers within each group of mobile units are tuned to the first tone in the group code, which is heard to the tone code transmitted by the base station and triggered by the office of the group in question. As soon as this first tone has been received via the receiver MM of the mobile unit, the tone receiver TMM is switched over to the reception of the next tone via the register R until the entire group code has been received. The register R excites an opening circuit in the low-frequency amplifier LF of the relevant unit, so that reception can take place, ie the mobile unit is now set for reception. In this phase, the sound receiver TMM is tuned to receive the final or disconnection property, and as long as such a signal does not appear and as long as there is no interruption in the signal SI ₁ , the receiver remains open. The signal SI ₁ excites a hold circuit M, which in turn _{switches on a display device I 1} , for example a lamp. The signal SI ₁ excites not only the holding circuit in the mobile units of the controlled group, but also the mobile units in the other groups. If in

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The signal SI _{1 is} interrupted by a certain length, for example because the mobile unit leaves the working area of the base station, the circuits in the mobile units cause the transmission of a signal to the register R. When such a signal is received, the register is in its The initial position is reset and the contact between the mobile unit and the base station is released.

When a connection established between the base station and the mobile units of the botreffenden group is to be canceled again, the closing or separation signal in question is _f transmitted by means of the BUroapparats or by means of a limiter B ", responsive to the speech signals and the compound is a interrupts for a certain time after the speech signals stop. This closing or disconnection signal causes the register R to be reset to its initial position. This code has the effect that the register R of the mobile unit that has this code maintains the connection, while the closing or disconnection signal causes the other mobile units in the group to be switched off. The register R in the mobile unit, which is still connected, also actuates a display device, for example a lamp.

For sending from a receiving station of the above described type is a transmission or transmission request

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Stirrup switch S / M actuated. This touch switch is located on a microphone used for transmission transmission.When the touch switch is actuated, the receiver of the mobile unit is switched off and the transmitter of the mobile unit is switched on Unit with a special signal SI »modulated * This signal is received by the sound receiver TM of the base station, whereupon TM acts on the fork connection G so that the voice signals from the mobile unit can reach the office unit in question via FM, G and V. As soon as the transmission from the mobile unit ceases because the touch switch S / M has been switched over in the same, as a result of which MS is switched off and MM is included, the transmission of the signal SI ₂ also ceases. The holding circuit H is also connected to TSM via S / M in such a way that the register R cannot reset itself to an initial position during the transmission from the mobile unit and interrupt the established connection with the base station if there is an interruption in the transmission of the signal SI. enters from the base station.

The sound receiver TM provided in the base station responds to the signal SI ₂ from the mobile unit. As soon as the transmission of this signal ceases in the mobile unit after the transmitter MS has been switched off, ie every time the contact switch S / M is released, the sound receiver TM activates an extension or Varte control stereo Kj, which in turn TS operated in such a way that the first tone can modulate in the group code of the tone code in question FS and from this

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Encoder can be transmitted as a Varte Roglstrior signal. In this preferred example, this last-mentioned signal is transmitted before the operator in the office begins to speak, i.e. h _e the signal is transmitted in the interval that results in a change in the direction of the voice signals. The queuing or Varte registration signal can also be transmitted at other intervals of the conversation, for example in the time between the cessation of the voice signals from the office unit and the switching on of the SendeUbertragera MS of the mobile unit, or when MM is switched on in a sending unit « Bio queuing or waiting registration circuit K "is designed in a teekanne ter manner so that queuing or waiting registration signals are distributed evenly between the groups in successive intervals that occur when the direction of conversation is reversed. TM int is also designed in such a way that the fork connection G for connecting the relevant office unit to FS is switched over _D when the signal SI ₂ ends.

The call from a feasible unit to its office unit is slightly different, depending on whether the RF »channel unoccupied (i.e. not actuated) or occupied. With unoccupied Channel a call button CALL (ANR) is pressed. Then MS is occasionally switched on because CALL cause the relay of the S / M contact switch to be actuated occasionally can. Furthermore, the tone generator connected to the touch switch modulates TSM while it is switched on the switching assembly MS with a first group code signal, based on this signal the base station the Group of mobile units can determine to which the relevant calling mobile unit belongs *

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The "ret" group code signal is received by TM in the base station, before the signal causes _{the registration of a marker in a further memory M 2.} This storage device is connected to device A * Device A responds immediately to the marking, since the channel is unoccupied; The device A then actuates TS to transmit a "broad group code signal consisting of the tone code" and the "broad group code signal" puts all the mobile units belonging to the group of the calling mobile unit into the receiving state The subsequent closing or disconnecting signal then switches off all mobile units switched to reception at once. In the calling unit, the call button causes register R to block the disconnecting or closing signal and in this way prevents the calling mobile unit from being disconnected *

If, on the other hand, the RF channel is busy (I ₁ actuated) when the mobile unit wants to call its associated office unit, a waiting or contact button QUEUE (KÖ) connected in the same way as the call button CALL would have to be pressed. If MM is then switched on, the mobile unit can receive the registration signals or waiting registration signals transmitted by the base station during reversals of the conversation direction. When such a signal is received, the circuit TMM excites the circuit TSM via the registers R and dl · relevant QUEUE keys, · whereby MS is modulated to transmit a first group code signal. The first group code signal is received in TM and causes the registration of a marker in the further memory M ₂ * Since the RF-Ka-

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ORIGINAL INSPECTED

nal is already occupied when the marking is recorded the waiting registration device speaks K- an, which is "connected" to the memory M in the manner described above d. H. the one in progress The conversation is switched off by the speech limiter B .. after a predetermined period of time. Once the RF channel becomes free for the marking in question, only the mobile unit from which the call originates is connected, while the register R in this particular wheeled unit, is in contrast to the registers in the other wheeled units, operated in such a way that it is not like the registers in these other wheeled units responds to the disconnect or final signal. This operation of the register is in a simple known manner ■ obtained with the Qülül key and is also occasionally in such a way that the mobile unit for the disconnection or final signal in the usual way after the end of the conversation can be switched off.

The described embodiment according to the invention allows a conversation between two or more people mobile units in the same group in a simple manner both from the office unit and from the mobile units Units received from. A wagon-to-wagon conversation can be brought about by means of a button C-C (B-B) which is at the same time as the touch switch S / M is pressed. The tone generator TSM then transmits a special signal SI., Which is received by TM, which in turn acts on the fork connection G in such a way that the voice signals received in FN are sent out again via FS will ·· Furthermore, T8 carries the group code or the activation · signal to the group in question naoh

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the β em code informs the mobile unit, of which the call goes out, through speech, that it is a question about a vague "car conversation." Then will the button C-C is printed in the requested mobile unit and the connection can be established »A mobile unit Unit in communication with its office unit can press the C-C key on car-to-car conversation switch ρ after which the mobile unit sends the signal SI «, instead of the signal SI. begins to transmit, resulting in has that TM responds in the manner mentioned above.

In addition to the components described above, the mobile unit is also equipped with a button SL by means of which the display device Ig can be reset as soon as the conversation between the office unit and the individual mobile unit selected by the office unit has ended. After such a connection has been established, a permanent display I _{2 is obtained} in the mobile unit, this display subsequently indicating to a user that a call has taken place. The base station also has the speech limiter 3_, which disconnects an established connection a predetermined period of time after the conversation has ended, as well as the limiter B-, which interrupts the connection after a predetermined time if a call is not answered in the office unit The base station also has a tent generator clock C which _{controls the device A, the limiters B 2} and B 1 and the call charging device S.

The embodiments described above can in manifold details within the scope of the basic idea of the invention as defined by the following claims can be modified, as for the skilled person without further can be seen.

Claims t

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Claims (1)

1pm & 9am Dr. Mr Claims ty Movable or mobile radio system with a (fixed) Base station and a number of movable or mobile units, each of which is used to create a radio « connection with the base station has devices which, when actuated, send an initiation or initiation signal to the base station transmitted which one to this initiation signal has appealing device that upon receipt of the initiation signal from a mobile unit concerned Transmits connection signals, which divide the connection between the mobile unit and the base station, characterized * that the mobile units are divided into groups and each Group their own initiation or initiation signal in the form a first group code signal is assigned that the device responsive to the initiation signal in the base station upon receipt of the first group code signal from a drivable unit of a certain group of drivable units a corresponding to the first group code signal Second group code signal that puts all mobile units in the group in question in a receivable state offset, as well as after the transmission of this second group code signal transmits a separating or closing signal, that put the shutdown in the receiving state Units of the relevant group of mobile units causes, and that in each mobile unit that device which is used to transmit the Einleitbzw. Initiation signal can be activated in conjunction with the Transmission of the first group code signal a blocking 209844/0741 the mobile unit to the reception of the T _r enn- or circuit signal concerned effected such that the one mobile unit remains within the group from which the first group code signal 1st assumed in the receiver being enabled state, while all other mobile units of the respective group by the Final or separating signal can be switched off. 2. Radio system according to claim 1, characterized in that that each mobile unit goes through one after the other Establishing a connection, the disconnection or termination signal can be switched off, 3 * radio system according to claim 1 or 2, in which with the base station (Fig. 1) office units (EA ₁ , EA ₂ ... EA _n ) are connected via fixed lines and each such office unit is assigned its own group of mobile units, thereby marked that the office units are connected to the base station in such a way that the base station transmits the first group code signal when an office unit is actuated. 4. Radio system according to one or more of the claims 1 to 3 »characterized in that dia on the Einleitbzw. Initiation signal responding device in the base station when an office unit is activated, it transmits a closing or disconnection signal followed by an individual code signal, this individual code being suitable for maintaining the connection with the individual code signal in question corresponding mobile unit within the group and the disconnection of all other mobile units 209844/0741 Units of the group effected. 5 x radio system according to one or more of the preceding claims, characterized in that "-that the base · station a Sprechbegrenzer (Bg) which _{r is} the expiry of a predetermined period of time after the cessation of voice signals in an established connection, the transmission dea separation or * circuit signal causes. 6. Radio system ■ according to one or more of the preceding Claims, characterized in that the base station also transmits a special signal (SI.) can, a holding circuit in the individual mobile units (H) actuated, which is connected to a display device (i-), for example a lamp, or a has such a display device which, when the RF channel is busy, for all mobile units, all groups indicates that the channel is busy 7 · Radio system according to claim 6, characterized in that that the holding circuit (H) disconnects the connection causes if in the special signal (SI.) a The interruption exceeds a specified period of time. 8 »Radio system according to one or more of the preceding claims, characterized in that a call from one of the mobile units and the office units (EA ^, EA_ ... EA) caused a marking in a memory (M ₁ ) to be registered on which one with the 209844/0741 - Ιό - Memory (M ₁ ) connected device (α) responds to an unoccupied RF channel and then initiates a connection corresponding to the marking in question, the device (A) acting on several markings according to a predetermined pattern [, for example in accordance with the sequence "in which the marks were registered addresses. 9 · Radio system ■ according to one or more of the preceding claims »characterized in that the base station has a recording device (K ₂ ) connected to a sound receiver (TM)" actuated by the sound receiver at intervals "which correspond to the changes in the direction of conversation is and this transmits a Anteil- or waiting Regietriersignal, and that each mobile unit in an Anstell- or. _R can be set a waiting position in which the mobile unit on receipt of a Ansteil- or waiting-directed Trier tiber signal carrying the first group code signal bowirkt the registration of a mark in the memory " 10. A radio system according to one or more of the preceding claims, characterized in that the base station has a _{memory connected to a setting or waiting regietriervorrichtung (K 1} ), which is connected to one or more incoming markings and when the RF channel is already occupied a speech limiter (B) triggers, which transmits an advisory signal to the information that the currently existing connection will be interrupted after a predetermined time, and interrupts the existing conversation connection after the predetermined time has elapsed. 209844/0741 11o radio system according to one or more of the preceding Claims »characterized» that the individual mobile units each have devices that when actuated, a signal (S1 ") is transmitted" that the production a connection to a mobile unit within the same group if the connection is already established between the first-mentioned mobile unit and the base station, the base station then transmits the second group code signal and its receiver (FM) and transmitter (FS) for retransmission of incoming Turns on voice signals. 209844/0741 49. 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