CZ74096A3 - Method of determining charges in telephone network - Google Patents

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

(57) The method addresses the transmission of charge information to subscriber devices and the transmission of charge pulses to the A / B interface of the subscriber devices in a local switching and transmission system. It is organized as a local radio cell, consisting of one central radio base and a plurality of distributed subscriber devices, and connected to the public communications network as a local exchange or as a branch office. In the base station of each radio cell is stored a table of tariff bands corresponding to the location of the base station and containing clock information for counting charges for the local area and for all communication connections outside the local area. During the ongoing service of the telephone subscriber, the selected number is automatically compared with the table of tariff bands, the corresponding clock information is subtracted and transmitted to the subscriber apparatus, which generates the standard charging pulses in the corresponding transmitted clock, which it transmits to the A / B interface.

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2.1

METHOD OF DETERMINING FEES

AND

FIELD OF THE INVENTION The invention relates to a method for transmitting charge information to subscriber devices and for transmitting charge pulses to an A / B interface of subscriber devices in a local switching and transmission system, which is organized as a local radio cell, consisting of one central radio base and more distributed subscriber devices. This system is connected to the public communications network as a local exchange or branch office.

A similar local connection and transmission system is known from WO 94/13112 (DE 42 20 2499 A1 respectively).

BACKGROUND OF THE INVENTIONfrom the prospectus fi. COMTEL Telefon und Datentechnik Gmbh & Co. KG KG, Brucker Str. 53, 82205 Gilching b. Munchen is a well-known system in which a coin-operated fax and telephone are equipped with an integrated charging computer that eliminates the phone's dependence on 16 kHz pulses from the telephone company. For the purpose of determining charges, the payload is made up of 16 kHz charge pulses or charging units are calculated based on the selected number according to the following distinguishing points: local, nearby, public or long distance calls in three tariff zones, mobile phone services, with special services (eg telegram reception) are blocked, unpaid telephone numbers and police, doctor are taken into account, and unit fees including basic fees are free programmable.

In an arrangement according to the above method, which is known from German patent application P 42 20 249, but especially in special arrangements, it is difficult under certain operating conditions to transmit fee information to the subscriber radio apparatus of said radiotelephone system and transmit it to the A / B interface. these radio devices as a standard charge impulse for its needs. The default situation is that a standard 12 kHz or 16 kHz charge pulse cannot be transmitted over the radio channel, and that a replacement signal set in the 300 Hz to 3400 Hz speech band would interfere with the transmission of modem or fax signals.

SUMMARY OF THE INVENTION:

The essence of the invention of the method of determining charges in the telephone network consists in a method of operation which enables the calculation of charges or their determination at the location of the voting participant even if a radio channel is used.

The task is solved according to claim 1 by storing in a base station of each radio cell a table of tariff zones corresponding to the position of the base station. It contains clock information for local area deductions and for all communications outside the local area. The base station, while in progress, automatically handles the telephone number selected by the subscriber to the table of tariff bands, subtracts the corresponding clock information and transmits it to the subscriber apparatus, which generates the standard clock pulses transmitted to the A / B interface.

This achieves that the above-mentioned device can also provide the subscriber with information about the charges at that time if the radio channel interferes with or prevents the transmission of standard charge pulses.

The invention also relates to a method of operation (claim 2), wherein the clock information is transmitted from the base station when a start signal is given from the other side (subscriber B picked up). This ensures that charging does not start until the other party answers the call, as is usual with most networks.

The invention also relates to a method of operation (claim 3), wherein the clock information is transmitted from the base station as soon as the trunk is occupied to the communication network, in those cases where no initial signal is given from the other side.

The invention also relates to a method of operation according to claims 1 and 2, wherein the subscriber apparatus takes the transmission of the clock information simultaneously as an initial signal.

The invention also relates to a mode of operation (claims 1 and 3), wherein a delay between the reception of the clock information and the onset of the first charge pulse can be programmed in the subscriber apparatus, generally taking into account the time between

As already mentioned, the default situation is that a standard 12 kHz or even 6 kHz charge pulse cannot be transmitted over a radio channel, since the transmission bandwidth of the channel is limited to a speech band from 300 Hz to 3400 Hz. The initial situation is also that the substitute signal set in the speech band from 300 Hz to 3400 Hz would interfere with the transmission of modem or fax signals and that the parallel

(Radio channel) is not available, or is not acceptable for financial reasons.

The state of the art is that in cases where, for various reasons, charging impulses cannot be transmitted, special coin-operated telephones (Intelligent Payphones) are used. These compare the number selected by the subscriber with the stored table of tariff zones and calculate the fees based on the clock selected from this table. The disadvantage of this procedure is that corresponding hardware and software resources are required for each terminal. Another disadvantage is that, as a consequence of the aforementioned disadvantages, a limited fee scale is generally employed (the greater the depth of the scale, the stronger the dependence of the tariff zone table on the band and the higher the acquisition and update costs). In addition, this mode of operation does not offer any solution when using private telephones of private customers, which can display call charge data based on charge impulses. A typical representative of the aforementioned mode of operation and this category of apparatus is the aforementioned arrangement according to the prospectus fi. COMTEL.

According to the invention, therefore, in a telephone network according to the above arrangement (such as DE 42 40 249 Ai), a base station table is stored in the base station which contains the respective toll clock information for all possible local and state telephone numbers, mobile telephone numbers As this table is only one for the entire radio cell, the initial installation costs and the cost of updating during operation are scarce. This allows for greater depth scaling of the table and with it, more accurate fee calculations than

- 5 as is the case with the above method. Due to the way we operate, the charge information can be provided not only to coin-operated telephones, but also to all other subscribers, so that it is possible to provide this information to private customers who would use phones with appropriate equipment during the call.

SUMMARY OF THE DRAWINGS:

The invention is explained in more detail on the basis of the exemplary embodiments shown in the figures.

Giant. 1 shows a search tree of the tariff zone table.

Giant. 2 shows a block diagram of a device for transmitting clock information

DETAILED DESCRIPTION OF THE INVENTION:

The table of tariff zones is organized as a search tree - Fig. 1. Search levels 1.1. 1.2. 1.3 etc. correspond to the selected numbers 1, 2, 3 etc. The search algorithm is the same for all branching points, as shown in the example. The choice leads to the branching point 1.6. where further dialing of the next number is expected, it will be evaluated whether this number would continue to the next lower level. If the number does not continue to the next lower level, the search is terminated and the numeric value 1.7 (clock information) assigned to this branch point is valid. If the following number 3 is in the example, continue through transition 1.8 to the next point 19.

If the reached point is an end point, such as 1.10, then the numerical value corresponding to that point is immediately valid and the search is terminated without expecting to select the next digit.

It is also shown in Fig. 1 that in the first level 1.1 the local tariff applies if the following digits are neither 0 nor 1. If the following digit is Ί, the ”free case 1.11 applies. This allows for high search speeds, and the shortest path search will be interrupted when there are no more transitions or another valid transition.

As soon as in the radio network according to the above arrangement, e.g. DE 42 40 249 A1, the subscriber apparatus is registered in the organizational channel, the base station is switched to a free channel according to the radio connection protocol recorded in the basic patent. The digits selected by the subscriber (or automatically by the terminal) are transmitted over this call channel. The selected digits detect the channel assembly that is assigned to this speech channel 2.1 (see Fig. 2). Two detectors are required for this.

a. The first detector 2.2 is a modem that is connected by its receiving input to the output of a RX 2.4 channel receiver. This detects the selected digits, which are transmitted from the subscriber unit via a modem signal in the BCD code. This applies to all dialed digits that come from the subscriber memory and the pulse-dial terminals. The detected information is transmitted from the modem 2.2 to the channel controller 25. Therefore, the data output of the modem 2.2 is connected to the data input of the channel controller 25. The modem dialed numbers are connected to the Dual Tone Transmitter by the channel controller 25.

-Ί 2.7, which issues a DTMF-select signal, which will be transmitted to the PCM-Codec 2.9 by combiner 2.8. During this operation, switch 26 is opened by channel controller 2.5 to prevent DTMF dialing from being disturbed by the modem signal.

b. The second detector 2.5 is a Dual Tone Reciever (DTR), which is connected to the output of the channel receiver 2.4 by its receiving input. This detects the selected digits that come from the DTMF dial. Detected information is transmitted from DTR 2.5 to channel controller 2.5. Therefore, the DTR 2.5 data output is connected to the channel controller 2.5 data input. During this operation, the switch 2.6 switches on the switch 2.6 so that the selected digits can be transmitted to the PCM-Codec 2.9 via the combiner 2.8 without a new conversion.

The search results in the clock information that is first stored in the channel controller 2.5. As soon as a start signal is given from PCM-Codec 2.9 of the channel assembly 2.1, the clock information is transmitted by radio path from the channel controller 2.5 to the subscriber. Therefore, the data output of channel controller 2.5 is coupled to the transmit input of modem 2.2. The transmit output of modem 22 is connected to the input of combiner 2.10. The output of the combiner 2.10 is connected to the TX transmitter input, whereby the modem signal is applied to the transmission path.

The receiving device evaluates the clock information as a start signal. The polarity reversal is then carried out on the A / B connection of the subscriber, if this additional function is programmed. The first charge pulse is generated after the programmable delay has elapsed. Other charge pulses are generated to match the specified clock.

A programmable delay, indicating the time that elapses before the transmission of the first charge pulse, and which is entered when the subscriber is initially initialized, is necessary in order to achieve two different meanings of the initial signal.

1. The basic party is connected to the communication network via the extension line. These can be analogue state lines for call-in operation (IKZ - Impulse - Kennzeichen - Verfahren, DID)

- Direct Invard Dialing, Analog E&M) or Digital Provisioning Systems (Sq * ISDN Basic Connection, S2M)

- ISDN primary multiplex connection, PCM / E & M-configured, MFC / R2 and others). In these cases, an initial indication is given from the communication network when Subscriber B picks up and may be followed by an un delayed transmission of the first charges.

2. If the base station is connected to the local exchange (HKZ - Hauptanschlup - Kennzeichen Verfahren) by the local loop, no initial indication shall be given from it when picked up by the subscriber Β. In this case, the point in time at which the connection bundle to the local exchange (local loop) is occupied is taken as an initial indication. In this case, a delay between the start signal and the transmission of the first charge pulses can be programmed in the subscriber apparatus, generally taking into account the time between the occupation of the communications bundle to the communication network and the collection of subscriber B.

Charge pulses can be transmitted as i2 or 16 kHz pulses Here, therefore, a programmable sine generator is usually used, which can be set to the required frequency by the remote control and operates in mode

- 9 Start í Stop. The output of the programmable sine generator is connected to a SLIC (Subscriber Line Interface Circuit), which amplifies the signal and passes it on to the A / B-line of the subscriber.

The currently used variant will be programmed at the initial initialization of the subscriber.

INDUSTRIAL APPLICABILITY:

The method of determining charges in the telephone network can be used in the telecommunications industry to indicate subscription fees.

Claims (5)

PATENT CLAIMS A method of determining charges in a telephone network for transmitting charge information to subscriber apparatuses and for transmitting charge pulses to an A / B interface of subscriber apparatuses in a local switching and transmission system, which is organized as a local radio cell, consisting of one a central radio base and a plurality of distributed subscriber apparatus and connected to the public communications network as a local exchange or a branch device, characterized in that the base station of each radio cell stores a table of tariff bands corresponding to the location of the base station and containing clock information for counting charges for the local area and for all communication connections outside the local area, during the ongoing service of the telephone subscriber, the number chosen by him / her is automatically compared with the table of tariff zones, o the corresponding clock information is read and transmitted to the subscriber, which generates standard charge pulses in the corresponding transmitted clock, which it transmits to the A / B interface. Method according to claim 1, characterized in that the clock information is only transmitted from the base station when a start signal is received from the other side (subscriber B picked up). 3. The method according to claim 1, wherein the clock information from the base station is transmitted as soon as the junction harness is connected to the remote communication network, in those cases where no initial signal is given from the other side. . Method according to claims 1 and 2, characterized in that the subscriber apparatus takes the transmission of the clock information simultaneously as an initial signal. Method according to claims 1 and 3, characterized in that a delay can be programmed in the subscriber apparatus between the reception of the clock information and the onset of the first charge pulse, which generally takes into account the time between the cable connection to the communication network and the collecting participant B.