WO1996003832A1

WO1996003832A1 - Charge recording in a telephone network

Info

Publication number: WO1996003832A1
Application number: PCT/EP1995/002733
Authority: WO
Inventors: Andreas Hachenberger; Detlef Herold; Holger Podolski; Reinhold Pohl; Joachim Seidel; Bruno Stadler
Original assignee: Jenoptik Communications Gmbh
Priority date: 1994-07-28
Filing date: 1995-07-12
Publication date: 1996-02-08
Also published as: PL313789A1; CN1131493A; CA2172833A1; SK36696A3; EP0721723A1; CZ74096A3; DE4426689A1

Abstract

The invention concerns a method of transmitting charge data to the subscriber connectors and for emitting charge pulses to the subscriber connector a/b interface in a local switching and transmission system which is arranged as a local radio cell, consisting of a central stationary radio station and a plurality of decentralized subscriber connectors, and, as a local or private branch exchange, is connected to the public telecommunication system. According to the invention, the base station of each radio cell stores a distance zone table which is adapted to the location and which contains the clock pulse data for calculating the charges, for the local area and all telecommunication connections outside the local area. During an outgoing communication from a radio subscriber, the call number selected by this subscriber is compared automatically with the distance zone table and the appropriate clock pulse data is removed and transmitted to the subscriber connector which generates standard charge pulses according to the clock pulse transmitted and emits them to the a/b interface. The standard charge pulse of 12 kHz or 16 kHz cannot be transmitted via radio channels whose transmission band-width is restricted to the speech band from 300 Hz to 3400 Hz. As a result of the solution applied, the charge pulse does not have to be transmitted, as in as other, conventional processes, as a substitute signal embedded in the speech band, which, according to experience, would disturb the transmission of modem and fax machine signals.

Description

Registration of charges in a telephone network

The invention relates to a method for transmitting charge information to the subscriber switching devices and for issuing charge pulses at the a / b interface of the subscriber switching devices in a local switching and transmission system, which is a local radio cell consisting of a central base station and a large number of decentralized ones Subscriber switching devices, organized and connected to the public telecommunications network as a local exchange or private branch exchange.

Such a local switching and transmission system is known from WO 94/131 12 (or from DE 42 20 249 AI).

Furthermore, a brochure from COMTEL Telefon und Dateπtechnik GmbH & Co. KG, Brucker Str. 53, 82205 Gilching b. Munich, already known to provide for a coin fax machine and a payphone a charge computer integrated in the phone, which detects the phone from the 16 kHz pulse

Teiefonnetzbetreibungsgesellschaft makes independent. Either the 16 kHz charge pulse is formed for charging or the charge units are calculated based on the dialed number with the following distinguishing features: local call, local area, national, end-to-end calls in 3 tariff zones, mobile phone services, whereby special services (e.g.

Telegram recording) are blocked and toll-free numbers (1 10, 1 12) are taken into account and the fee amounts including base amounts are freely programmable.

With an arrangement according to the type mentioned at the outset, but in particular with a special arrangement known from German patent application P 42 20 249, it is difficult, under certain operating conditions, to transmit charge information to the subscriber radios of the radio telephony system described there and to the a / b interface of the subscriber radios as a standard fee impulse for the use of these connected terminals. The starting situation is that the standard fee pulse of 12 kHz or 6 kHz can not be transmitted over the radio channel, and that with an alternative signal arranged in the voice band from 300 Hz to 3400 Hz, this would interfere with the transmission of signals from modems and fax machines.

The object of the invention is to provide a procedure which nevertheless enables a fee calculation or fee entry at the location of the voter, even if a radio channel is used.

The object is achieved according to claim 1 in that everyone in the base station

Radio cell a distance zone table adapted to the location is stored, which contains the timing information for the billing for the local area and all telecommunication connections outside the local area and that when a radio subscriber is outgoing traffic, the telephone number dialed by this subscriber is automatically compared with the distance zone table, the relevant timing information is extracted and sent to Subscriber switching device is transmitted, which generates standard charge pulses according to the transmitted time pulse and outputs them at the a / b interface.

This ensures that the system mentioned at the outset also has no problem

Can provide charge information to the subscriber if a radio channel interferes with or makes it impossible to transmit standard charge pulses.

According to a second embodiment (claim 2) of the invention

The timing information is transmitted from the base station as a procedure if the start signal (B subscriber has picked up) is available from the remote station. The result of this is that billing does not begin until the other subscriber has answered the call, as is customary in most networks.

According to a third embodiment (claim 3) of the procedure according to the invention, the timing information is transmitted from the base station to the telecommunications network with the occupancy of a trunk in the event that no identification is given by the remote station. According to a fourth embodiment of the method according to the invention according to claims 1 and 2 (second embodiment), the subscriber switching device simultaneously evaluates the transmission of the timing information as a start signal.

Finally, according to a fifth embodiment of the invention

Method according to claims 1 and 3 (third embodiment), a waiting time between receipt of the timing information and output of the first charge pulse can be programmed in the subscriber switching device, which generally takes into account the time between the occupation of a trunk to the telecommunications network and the pickup by the B subscriber.

The invention is explained in more detail by means of exemplary embodiments which are shown in the drawings.

It shows:

1 shows a search tree of a distance zone table; and

Fig. 2 is a block diagram of the timing transmission device.

As already mentioned, the initial situation is that the standard fee pulse of 12 kHz or 16 kHz cannot be transmitted over the radio channel, since its transmission bandwidth is limited to the speech band from 300 Hz to 3400 Hz, that in the speech band from 300 Hz to 3400 Hz arranged replacement signal would interfere with the transmission of signals from modems and fax machines and that a parallel additional transmission path (second radio channel) is not available or is not acceptable for cost reasons.

State of the art is that in cases in which fee impulses cannot be transmitted for different reasons, special payphones

(Intelligent Payphones) can be used. These compare the call number dialed by the subscriber with a stored distance zone table and carry out the charge calculation on the basis of the time cycle taken from this table. Disadvantages of this method are that, on the one hand, the hardware and software expenditure must be present in each terminal, that as a result of the above in generally work with a limited fee differentiation (the greater the depth of differentiation, the greater the location dependency of the distance zone table and the higher the costs for initial equipment and updating in operation) and finally the procedure is not a solution for the use of comfort telephones with private customers which is an advertisement of the

Offer call charges based on charge impulses. A typical representative of the above. Approach and this device category is the arrangement mentioned at the beginning in accordance with the COMTEL brochure.

According to the invention, a distance zone table is now stored in a radio network in accordance with the type mentioned at the beginning (as described in DE 42 40 249 A1) in the base station, which contains the associated charge cycle information for all country codes, area codes, codes for mobile networks, special services etc. that occur. Since this table is only available once for the entire radio cell, the initial installation and update costs (costs for

Updates during operation), converted to the number of participants, low. This allows a greater depth of differentiation of the table and thus a more precise fee settlement than with the aforementioned methods. Due to the principle of the method described below, in addition to coin-operated telephones, all other radio subscribers can also be served with charge information, so that even in the private sector

Customers can use the appropriate comfort phones to display charges during the call.

The distance zone table is organized as a search tree in accordance with the illustration in FIG. 1. The search level π 1.1, 1.2, 1.3 etc. correspond to the numbers dialed as 1st, 2nd, 3rd etc. The search algorithm is the same for all branch points, which is shown using an example. At branch 1.6 we wait for the choice of the next digit and check whether there is a transition to the next lower level for this digit. If there is no such transition for the next digit, the search is ended and the numerical value 1.7 (timing information) assigned to the branch point is valid. If the next digit in the example is "3", the next point 1 .9 is jumped to via transition 1 .8. If the point reached, such as 1 .10, is an end point, the numerical value assigned to this point is immediately valid and the search is ended without waiting for the next digit to be selected.

In Fig. 1 it is also shown as an example that the local tariff is valid in the first level 1 .1 if the following digit is not "0" and not "1". If the following number is "1", the case "free of charge" 1 .1 1 becomes valid. This method enables high search speeds and the search is terminated according to the shortest route principle if there are no further transitions or no further valid transition.

If a selection request is registered in the radio network according to the type mentioned at the beginning or according to DE 42 40 249 A1 by a subscriber switching device in the organization channel, the base station commands the device into a free one in accordance with the radio switching protocol shown in the basic patent

Conversation channel. The digits dialed by the subscriber (or automatically by a terminal) are transmitted in this conversation channel. The channel module 2.1 assigned to this conversation channel (see FIG. 2) detects the dialed digits. Two detectors are required for this.

a) A first detector 2.2 is a modem, which is connected with its receiver input to the output of the channel receiver RX 2.4. With this the dialing digits are detected, those of the subscriber interface device via modem signal

BCD-coded. This applies to all dialing digits that come from the memory of the subscriber interface device and from end devices

Impulse dialing. The detected information is from the modem

2.2 passed to the channel controller 2.5. The data output of the

Modems 2.2 connected to a data input of the channel controller 2.5.

The dialing digits transmitted by modem are fed from the channel controller 2.5 to a dual tone transmitter 2.7, which outputs a DTMF dialing signal which is transmitted to the PCM codec 2.9 via a combiner 2.8. During this process, the channel controller 2.5 turns on

Switch 2.6 opened to prevent interference with the DTMF selection by the modem signal. b) A second detector 2.3 is a dual tone receiver (DTR), with its

Receiver input is connected to the output of the channel receiver 2.4. This is used to detect the dialing digits that come from terminals with DTMF dialing. The detected information is transferred from the DTR 2.3 to the channel controller 2.5. For this purpose, the data output of the DTR 2.3 is connected to a data input of the channel controller 2.5. During this process, the switch 2.6 is closed by the channel controller 2.5, so that these dialing digits are transmitted to the PCM codec 2.9 via a combiner 2.8 without being converted again.

The detected data are transmitted from the channel controller 2.5 via a data bus 2.12 to the radio control server 2.13, which carries out the search in the distance zone table 2.14 for all channel modules. After a search result is available, it is transmitted from the FLS 2.13 to the channel controller 2.5.

The search result is timing information that is initially stored in the channel controller 2.5. As soon as the start signal is received from the PCM codec 2.9 of the channel module 2.1, the timing information is transmitted from the channel controller 2.5 via the radio path to the subscriber switching device. For this purpose, a data output of the channel controller 2.5 is connected to the transmitter input of the modem 2.2. The

The transmitter output of modem 2.2 is connected to the input of a combiner 2.10. The output of the combiner 2.10 is connected to the input of the TX 2.1 1 transmitter, whereby the modem signal is fed into the transmission path at this point.

The reception of the time information is evaluated by the user interface device as a start signal. Then, if this optional function is programmed, the polarity changeover is carried out at the a / b connection of the user interface device. After a programmable waiting time has elapsed, the first charge pulse is generated. The further charge impulses are generated according to the specified time cycle.

A programmable waiting time until the first charge pulse is issued, which is entered when the subscriber interface device is initialized, is necessary in order to do justice to two different meanings of the start character. 1.) The base station is connected to the telecommunications network via extension lines. This can be analogue trunk lines for direct dialing (IKZ - impulse identification procedure, DID - direct invard dialing, analogue cross connection E&M) or digital direct dialing systems (SQ - ISDN basic access, S2M - ISDN primary multiplex connection, PCM / E & M- configured, MFC / R2 and others). In these cases, the telecommunications network sends a start signal when the B-subscriber picks up and the first charge impulse can be output without delay.

2.) If the base station has subscriber lines (HKZ

Main connection identifier method) is connected to a local exchange, no start signal is given by the B subscriber for the off-hook. In this case, the base station determines the time at which it assigns the trunk

(Subscriber line) to the local exchange, evaluated as a start signal. In this case, a waiting time between the start signal and the output of the first charge pulse can be programmed in the subscriber switching device, which generally takes into account the time between the allocation of a trunk to the telecommunications network and the pickup by the B subscriber.

The charge pulses can be output either as 12 kHz or 16 kHz pulses. For this purpose, a programmable sine generator is available in a conventional manner, which can be set to the required frequency by the controller of the subscriber interface device and is operated in the start / stop regime. The

The output of the programmable sine generator is connected to a SLIC (Subscriber Line Interface Circuit), which amplifies the signal and outputs it to the a / b connection of the subscriber switching device.

The variant that is valid at the time of initialization of the

User interface device programmed.

Claims

claims

1 . Method for the transmission of fee information to the subscriber switching devices and for the issuing of charging impulses at the a / b interface of the subscriber switching devices in a local switching and transmission system, which organizes and as a local radio cell, consisting of a central base station and a large number of decentralized subscriber switching devices is connected to the public telecommunications network as a local exchange or private branch exchange, characterized in that a distance zone table adapted to the location is stored in the base station of each radio cell, which table contains the timing information for the charge calculation for the local area and all telecommunication connections outside the local area and that one for outgoing traffic The radio subscriber automatically compares the phone number dialed by the latter with the distance zone table, takes the appropriate timing information and sends it to the subscriber ranswitch device is transmitted, which generates standard fee impulses according to the transmitted timing and outputs them at the a / b interface.

2. The method according to claim 1, characterized in that the timing information is transmitted from the base station when the starting signal (B-subscriber has lifted) is present from the remote station.

3. The method according to claim 1, characterized in that the timing information is transmitted from the base station in the cases in which no signal is given by the remote station with the assignment of a trunk to the telecommunications network.

4. The method according to claim 1 and 2, characterized in that the

User interface device simultaneously evaluates the transmission of the timing information as a start signal.

5. The method according to claim 1 and 3, characterized in that a waiting time between the start signal and output of the the first charge pulse can be programmed, which takes into account the time between the assignment of a trunk to the telecommunications network and the pickup by the B subscriber.