DE10223282B3 - Method, computer program and computer system for a prepaid telecommunication service - Google Patents

Abstract

The invention relates to a method for a prepaid telecommunication service with the following steps: DOLLAR A - first transfer of a booking amount from a first telecommunication device and an identifier assigned to the first telecommunication device to a server, DOLLAR A - server-side generation of a temporary booking identifier, DOLLAR A - server-side storage of the temporary booking identifier with the identifier assigned to the first telecommunication device as a key, DOLLAR A - second transmission of the temporary booking identifier to the first telecommunication device, DOLLAR A - third transmission of the temporary booking identifier, the identifier assigned to the first telecommunication device and a identifier assigned to a second telecommunication device from the second Telecommunication device to the server.

Description

The invention relates to a method for a prepaid Telecommunication service, in particular for a digital mobile communication network, and a corresponding computer program and computer system.

It is known per se from the prior art to pay telephone charges by means of so-called prepaid payment systems. Such systems are out, for example US-A-5,915,226 ; US-A-6,226,366 ; US-A-6,236,851 ; WO 95/35 619 and WO 95/34 161 are known.

A prepaid payment system for the payment of telecommunications fees is offered, for example, by Vodafone with the D2-CallYa product (Www.d2vodafone.de/callya). With this prepaid concept, the Telecommunications customer so-called voucher or scratch cards which has a so-called voucher number printed on it. For charging A telecommunications customer calls a service number from his prepaid account on his cell phone and then gives the voucher number over the Keyboard of his cell phone. The booking amount assigned to the voucher number will then be credited to the customer account.

The disadvantage here is the effort for the Production of voucher or scratch cards as well as for distribution logistics required for these cards. For the telecommunications end customer The disadvantage is that a relatively long voucher number, usually twelve digits is long, must be entered by hand.

For the prepaid required by the telecommunications provider Administration, various products are commercially available, for example the ORGA prepaid service center from ORGA card systems GmbH, Paderborn (www.orga.com), cf. the product information “Thinking Solutions for Prepaid ", which can be loaded from the specified web address.

Other prepaid products Service administration is available from Siemens AG, especially the "VoMSXpress" product, which is a voucher management system for the management of prepaid prepaid cards and for the implementation of bookings acts (www.pse.siemens.at).

Other prepaid products Administration and the so-called Vocher Management are from Business Logic Systems (www.businesslogic.co.uk) and the Logica company (www.logica.com) available.

A common feature of such previously known prepaid administration systems is the requirement of a so-called Voucher Printing Systems, which means the need to manufacture so-called voucher, value or scratch cards with the printed one Voucher number.

Various are from the prior art other systems for known as cashless payment using cell phones. in this connection are so-called debit systems, for example for Payment of the fare in local transport systems (see "Card Forum 02/2002 "," Cell Phones for cash and tickets ", Arndt Weber).

From the DE 100 02 032 A1 a method for cashless payment using a mobile phone is known. To use this method, both the sender and the payee must be registered in an authorization computer that is part of a payment system. Information from the payment sender and payee is stored on the authorization computer and can be called up when corresponding identification codes are transmitted.

For execution choose a cashless payment the sender of payment over his mobile phone to the authorization computer. The sender of payments is from the authorization computer via the Subscriber Identity Module or the phone number of the mobile phone identified. The sender gives then over the keypad of his mobile phone the identification number of the payee a, which, for example, is displayed at the cash register of a sales point, and the amount of money to be paid.

Then a corresponding transfer to the payee's account carried out. This system therefore only allows you to enter a transfer order in favor of a payee via a Mobile phone. About that In addition, no other transactions are possible, so this system of the necessary flexibility lacking.

From the DE 101 01 815 A1 a mobile phone is known as a component in cashless electronic payment transactions. The payee informs the payer of his account number and sort code via the interfaces of the mobile phones. This information and the amount to be entered are automatically sent from the payer's phone to the payer's account over the air. The authorization to carry out the transaction is checked using a code set consisting of four blocks. The transfer amount will be credited to the payee's specified account. Again, this system has the disadvantage that only the entry of a transfer order, but no further financial transactions are possible.

Out EP 1 016 263 B1 a billing system and a billing method in a telecommunications network is known. Here, the customer calculated for a telecommunications service from statistical properties of this customer’s previous connections.

From the US-A-6,173,175 B1 a method for generating invoice data in a telecommunications system is known. This system enables groups of telecommunications subscribers to share a single account.

From WO 01/48 714 A1 is a Procedure for implementation of payment transactions known using cell phones. In a first phase the mobile device involved in the payment transaction and the Payment terminal assigned to each other in a transaction center. In The second phase then finds the payment transaction between the Mobile device and the payment terminal via the transaction center instead of. The second phase is initiated by the transaction center, by sending the payment request to the payment transaction to the mobile device involved in the payment transaction in question is transmitted. This known system has the particular disadvantage that it only the payment of a payment amount based on a corresponding one Enables a payment center to request payment, but not about it financial transactions going beyond. This system is also therefore not sufficiently flexible.

From the DE 100 37 175 A1 a method for confirming a transaction using a mobile radio terminal is known. To confirm a transaction, confirmation data is transmitted to the transaction partner via a data channel. An unstructured supplementary services data channel, a so-called USSD channel, in particular a GSM, GPRS or a UMTS mobile radio network, or a feature code service channel, a so-called FCS channel, in particular an IS-41 mobile radio network, is used as the data channel used.

From the EP 1 128 340 A1 a method for charging a customer account for telecommunications services and a corresponding charging system is known. After paying the desired number of value units to a paying agent, an online connection is established between the paying agent and the network operator. A customer account top-up request is transmitted from the paying agent to the network operator, on the basis of which the creditworthiness of the paying agent is checked.

The invention is based on the object Basically another method, computer program and computer system for one to create prepaid telecommunications service which is used for the payment of telecommunications charges is suitable and a high level of flexibility having.

The basis of the invention Task is with the features of the independent claims solved. Preferred embodiments of the invention are in the dependent claims specified.

The present invention enables Realization of a prepaid telecommunication service without physical voucher, value or scratch cards. this has the advantage that the effort for the production of the cards and the logistics for the distribution of the cards can be saved.

According to a preferred embodiment of the Invention is made for a temporary booking identifier is determined on the server side, which contains a random number. This temporary booking ID is only in combination with an identifier of the payee's telecommunications device. Preferably has such a temporary Booking identifier a relatively short length of, for example, four digits. In comparison to the state of the art, a user only needs one very short booking ID for enter the booking of the payment amount.

This identifier can e.g. for the phone number, i.e. the MSISDN, or the IMSI (International Mobile Subscriber Identification) or TMSI (Temporary Mobile Subscriber Identity) or another the telecommunication device or the händer or act as an identifier assigned to customers.

According to a further preferred embodiment the invention is the temporary Booking ID only during of a relatively short period of time. In addition, the temporary booking ID has an assigned timestamp.

The temporary booking ID is only inside valid for a specified period, that starts at the time of the timestamp. The default Period for the validity the temporary booking ID can be chosen relatively short become, that is about a few minutes. The specified period must be only be as long as is typical for the transfer of the temporary booking ID to the telecommunication device of the payee, for the notification the temporary Booking ID at the payer and the entry of the temporary booking ID into the telecommunication device of the payer and their transfer back to the Server needed becomes.

According to a further preferred embodiment According to the invention, the payee is a trader. The dealer has one or more telecommunications devices, with their phone numbers as ID are registered on the server side. Furthermore, the dealer has one Merchant identifier this means a so-called point of sales (POS) identification number (ID).

For example, a seller accepts the payment amount in cash. Thereupon the seller uses a registered mobile phone to give the Dealer, which is assigned to the seller, for example, the booking amount corresponding to the payment. This booking amount is transmitted to a server via the mobile radio network and assigned to the dealer by means of the identifier of the seller's mobile device.

Thereupon there is a temporary booking ID determined, which are transmitted from the server to the seller's mobile device becomes. The seller shares this temporary Posting ID to the customer who previously made the cash payment has with. This can be done verbally or by building one Communication link between the mobile devices of the seller and the customer, for example via an infrared interface.

The temporary booking ID will then appear and the retailer's POS ID from the mobile device of the customer transfer the mobile network to the server and check its validity there (validation). If it is a valid one Booking ID is then the booking on the server side of the payment amount can be made to the customer account. Preferably this sales will be in a merchant account for the latter Billing of the telecommunications provider recorded with the dealer.

According to a further preferred embodiment The invention is based on the validation of the temporary booking identifier a permanent booking ID is determined on the server side. For investigation The permanent booking ID can be used on previously known vouchers Management systems used become. For example, such a voucher management Systems a list of voucher numbers, i.e. permanent booking IDs, generated. Then according to the invention at least some of the permanent ones included in this list Posting IDs not for used the production of voucher cards but for the conversion of temporary Aufbuchungskennungen.

For one as valid temporary found The booking ID becomes a permanent booking ID selected from the list of permanent booking IDs and the chosen one permanent booking ID from the list "deleted". The permanent Posting ID is then over transmit the cellular network to the customer's cellular device. The customer can then use the permanent booking ID in itself use known manner, the customer no physical Voucher card required. The customer can therefore call a specific service number and the Enter permanent booking ID to activate your credit.

However, the customer can also use the permanent Booking ID for the later Use in his cellphone save or forward to a third party. The forwarding can take the form of an SMS, for example.

According to a further preferred embodiment the invention allows a telecommunications customer to prepaid Account to another telecommunications customer's prepaid account make. In this way, payment can be made by anyone Goods or Services take place.

To carry out the transfer, the mobile device of the telecommunications customer the the transfer order want to enter the Posting amount transferred in favor of the payee should be entered. Thereupon, a temporary breakup identifier is generated on the server side determined, which is transmitted to the mobile device of the transferor becomes.

The telecommunications customer who the transfer want to make then notifies the payee the temporary Booking ID with. From the payee's mobile device then the temporary Transfer booking ID to the server. In addition, too the identifier of the mobile device transferred to the transferor, which is used to validate the temporary booking ID becomes.

For in the event that the temporary Booking ID as valid was found, the booking is then made in favor of the payee and the transferor's account will be charged accordingly. Alternatively, you can use the temporary booking ID be converted into a permanent booking identifier, and to the Transfer payee become.

The following are preferred embodiments the invention explained in more detail with reference to the drawings. It demonstrate:

1 1 shows a block diagram of an embodiment of a computer system according to the invention for a mobile radio network,

2 a flowchart for the registration of a dealer,

3 a flowchart for replenishing a customer's prepaid account,

4 a flowchart for the transfer of a permanent booking number to a customer,

5 a flowchart of charging a customer's prepaid account to another customer.

The 1 shows a mobile radio network 1, which works for example according to the GSM, GPRS, UMTS or IS-41 standard.

The telecommunication devices 2 . 3 and 4 as well as others in the 1 Telecommunication devices, not shown, can be accessed via the cellular network 1 communicate with each other as well as with a server 5 who is connected to the cellular network 1 connected is.

With the telecommunication devices 2 . 3 . 4 , ...., it is preferably cell phones that work according to the GSM standard. Such cell phones have a SIM card 6 on which the phone number, i.e. the so-called MSISDN (Mobile Station ISDN Number), is stored.

Communication between one of the telecommunication devices 2 . 3 . 4 , ... and the server 5 can be done, for example, by establishing a telephone connection, that is, by voice input. This is the server 5 assigned a service number that is called by the relevant telecommunication device to establish a connection. As soon as the connection is established, input data can be sent to the server using natural language 5 are transmitted as is known per se from the prior art.

Furthermore, between the telecommunication devices and the server 5 data can also be transmitted using a so-called SMS message (SMS = Short Message Service). Furthermore, data can also be transmitted using USSD or WAP or with another data service. The data to be transmitted can be control commands and / or user data.

The server 5 includes a prepaid module 7 and a database module 8th , The database engine 8th is used to manage the prepaid accounts for the telecommunication devices 2 . 3 . 4 , ... The database module contains 8th for each of the registered telecommunication devices, the relevant MSISDN to which the credit is assigned. If telecommunication fees are incurred for one of the telecommunication devices, they will be transferred to the relevant prepaid account in the database module 8th through the prepaid module 7 loaded.

The server includes prepaid administration, replenishment of prepaid accounts and 1 or other financial transactions 5 further components:
The computer program 9 includes a registration module 10 , one module 11 to generate a temporary booking ID and a module 12 to determine a permanent booking ID.

The module 10 is used to register telecommunications devices and dealers, as will be explained in more detail below.

The module 11 includes a random number generator 13 and a time base 14 , For example, a temporary booking ID has a predefined length of four digits. To generate such a temporary booking identifier, a pseudo-random sequence of digits that contains four digits is then generated using the random generator. This sequence of digits, which represents the temporary booking identifier, is also assigned a time stamp, which is derived from the time base 14 results.

The module 12 is used to determine a permanent booking ID for a temporary booking ID. This can be done so that the module 12 takes a permanent booking ID from a list of permanent booking IDs generated by a voucher management system.

With the help of the temporary booking identifier, a “virtual voucher card” is generated, which is stored in the database module 15 is saved. Such a virtual voucher card contains the temporary booking ID, the booking amount and the time stamp as well as other IDs that depend on the application. For example, a virtual voucher card includes the dealer identification (POS ID) and the telephone number (MSISDN) of the telecommunications device of the dealer from which the temporary booking ID was requested. Alternatively, a virtual voucher card contains an identifier, such as the telephone number (MSISDN), of the telecommunications device of a customer who wants to transfer a prepaid credit to another customer.

Furthermore, the server 5 a database module 16 , which is used to manage the dealer accounts. In the database module 16 the turnover made is recorded for each trader, that is to say each POS ID, the turnover made by the trader concerned from booking amounts is recorded for the purposes of the subsequent settlement of the telecommunications provider with the trader.

Furthermore, the server 5 a database module 17 , which is used for the registration of dealers. In the database module 17 are assigned to a dealer identification (POS ID), one or more identifiers of telecommunications devices of the dealer, such as their phone numbers (MSISDN), and a secret code, for example a personal identification number (PIN).

Such a PIN can be uniform for the dealer concerned. Alternatively, a separate PIN is assigned to each of the dealer's registered telecommunications devices, that is to say their telephone number. These PINs are then assigned to various sellers of the dealer who use the registered telecommunications devices, for example. Furthermore, in the database module 17 Master data of the dealer, such as his address and the like.

The operation of the system of 1 will be discussed further with reference to the 2 to 5 explained in more detail:

The 2 illustrates the procedure for registering a new dealer. For this purpose, in step 20 a client-server connection is established between the dealer's telecommunication device and the server 5 built up. Furthermore, it is assumed, for example, that the dealer is the telecommunications device 2 Has.

The client-server connection between the telecommunication device 2 and the server 5 can be called by a call from the telecommunications operator advises 2 to the service number of the server 5 take place or via another of the mobile radio network 1 provided data service. Alternatively, the dealer can also register via an Internet connection.

The registration is preferably carried out by a call from the telecommunication device 2 or by sending an SMS. In this case, the identifier of the telecommunications device, that is, the one in the SIM card 6 saved MSISDN automatically over the cellular network 1 to the server 5 with transfer. This service is called caller line identification and is provided as standard in a GSM mobile radio network, for example.

Because of the between the telecommunication device 2 and the server 5 established connection is in the server 5 generates a POS ID that is sent to the telecommunication device 2 over the cellular network 1 is transferred back. The POS ID becomes the MSISDN of the telecommunication device 2 assigned and in step 21 in the database module 17 stored.

In step 22, the dealer enters further master data, which is also in the database module 17 get saved. In step 23, a PIN is also assigned, which is assigned to the POS ID and also in the database module 17 is saved.

The invention thus enables a new dealer to be registered, for example by calling a specific service number or by another data service, such as, for example, USSD, SMS or WAP. For example, due to a call, the MSISDN of the telecommunications device 2 with transfer. This is then assigned the POS ID, which is via the mobile network 1 to the telecommunication device 2 is sent.

The 3 shows the procedure for filling a customer's prepaid account. Furthermore, it is assumed that the customer uses the telecommunication device 3 Has. In step 30, the customer pays the booking amount to the dealer, for example by paying in cash. The booking amount is the amount of money that the customer's prepaid account (see database module 8th ) should be filled.

In step 31 this transfer amount is transferred to the server 5 from the dealer’s telecommunications device 2. For this purpose, the dealer enters the booking amount in his telecommunications device 2 one so this to the server 5 is transmitted. The MSISDN of the telecommunications device 2 is also transferred when the additional amount is transferred. It can also be provided that the dealer enters his PIN for authentication.

After receiving the booking amount and the MSISDN of the telecommunication device 2 the server recognizes 5 based on the entry in the database module 17 that it is a call from a dealer with a specific POS ID. Because of this, the server creates 5 in step 32 a temporary booking identifier using the module 11 ,

Alternatively or additionally there the dealer one Service identifier when entering the booking amount in the step 31 one to the temporary Request a booking ID.

To generate the temporary booking ID in the module 11 is on the random number generator 13 accessed. One from the random number generator 13 The random number that is issued is used as a temporary booking identifier. Furthermore, on the time basis 14 accessed to generate a time stamp for the temporary booking identifier. The temporary booking identifier, the booking amount, which comes from the database module 17 using the MSISDN of the telecommunication device 2 determined POS ID, the MSISDN of the telecommunication device 2 and the timestamp are in the database module 17 saved as a "virtual voucher card".

In step 33, the temporary booking identifier from the server 5 over the cellular network 1 to the telecommunication device 2 of the dealer.

In step 34, the dealer communicates the temporary booking identifier to the customer. This can be done verbally or by local transmission between the telecommunication device 2 and the telecommunication device 3 for example via an infrared interface or also by sending, for example, an SMS from the telecommunication device 2 to the telecommunication device 3 ,

In step 35, the customer enters the temporary booking identifier in his telecommunication device 3 as well as the dealer identification (POS ID). The dealer will also provide the customer with the identifier.

This data is shared with the MSISDN of the telecommunications device 3 to the server 5 transferred and evaluated there. In step 36, it is checked on the server side whether the customer's, that is, its telecommunication device 3 received temporary booking ID is valid.

For this purpose, it is checked whether a corresponding temporary booking identifier in the database module 15 exists and whether this is assigned to the POS ID entered by the customer. It is also checked whether the temporary booking identifier has not expired due to the lapse of time. For this purpose, the in the database module 15 stored time stamp of the temporary booking identifier accessed and this with the current time of the time base 14 compared. If the time difference does not exceed a predetermined maximum time, the temporary booking identifier is considered valid tet. This maximum time can be relatively short, for example in the range of a few minutes.

If in step 36 the temporary booking identifier not considered valid has been recognized, the process returns to step 35 to the customer again prompt for input.

Otherwise, in step 37 the booking amount is posted to the prepaid account, which the customer or his telecommunications device 3 assigned. The corresponding booking is made by accessing the database module 8th using the MSISDN of the telecommunication device 3 as a key.

The database module is also accessed 16 with the retailer's POS ID to record the sales made (step 38).

In step 39 the server 5 to the telecommunication device 2 and to the telecommunication device 3 a confirmation of the execution of the transaction is sent.

The 4 shows an alternative operating mode. Steps 40 through 46 correspond to steps 30 through 36 of FIG 3 , In step 47, in contrast to step 37, the booking is not already carried out, but a permanent booking number for the temporary booking number is determined. This is done by accessing the module 12 ,

In step 48 the dealer sales detected, as is also the case in step 38.

In step 49, the permanent booking number is sent to the telecommunication device 3 transferred from the customer.

In step 50 the server 5 a confirmation of the transaction to the telecommunications device 2 and 3 sent, as is also the case in step 39.

In step 51, the customer can activate the permanent booking number by using the server in a manner known per se 5 Contact us and enter the permanent booking number, so that the prepaid booking amount is credited to the customer account. Alternatively, the customer can also send the permanent booking number to another customer, for example to the customer with the telecommunication device 4 Share for use. This forwarding can take place, for example, by sending an SMS message.

The 5 illustrates another use of the system of 1 , In this case, a telecommunications customer transfers prepaid credit to another.

It is assumed that customer A is the owner of the telecommunication device 2 and customer B is the owner of the telecommunications device 4 is. In step 52, the customer A enters a booking amount in his telecommunications device, so that this amounts together with the MSISDN of the telecommunications device 3 to the server 5 is transmitted. It can also be provided that customer A must enter the PIN assigned to him for authentication.

In step 53 the server checks 5 whether that's in the database engine 8th Customer A's saved credit is sufficient for debiting the additional amount. If this is not the case, the customer receives a corresponding message in step 54 and the process is terminated.

If the opposite is the case, that is, if customer A's credit is sufficient, the module uses the module to create a temporary booking identifier 11 generated. Furthermore, a corresponding entry in the database module 15 to generate a "virtual voucher card".

In this case, in the database module 15 instead of the retailer's POS ID and the MSISDN of the telecommunications device 2 the MSISDN of the telecommunications device 3 of customer A who requested the temporary booking ID.

In step 56, the temporary booking identifier from the server 5 to the telecommunication device 2 transferred from customer A. In step 57, customer A informs customer B of the temporary booking identifier.

The customer B then gives the temporary booking identifier and the MSISDN of the telecommunication device in step 58 2 of customer A in his telecommunication device 3 for transmission to the server. The server then checks in step 59 whether the temporary booking identifier is valid.

To check the validity of the temporary booking identifier in step 59, it is again checked whether a corresponding temporary booking identifier in the database module 15 is present and whether this includes the MSISDN entered by customer B in step 58. It is also checked whether the maximum time has not yet been exceeded. If there is no valid temporary booking ID, the customer will be asked to do it again.

If the opposite is the case, that is to say the booking identifier is recognized as valid, in step 60 the booking amount from customer A's prepaid account is stored in the database module 8th debited and in step 61 to the prepaid account of customer B in the database module 8th aufgebucht.

Alternatively, customer B in the Step 61 also get a permanent booking identifier the booking to a later one Time or to make the permanent booking ID to give to another customer.

In step 62, the server confirms to customers A and B by sending a confirmation message to the telecommunication devices 3 and 4 ,

1

Mobile network

2

telecommunications equipment

3

telecommunications equipment

4

telecommunications equipment

5

server

6

SIM card

7

prepaid module

8th

Database Engine

9

computer program

10

registration module

11

module

12

module

13

Random

14

time basis

15

Database Engine

16

Database Engine

17

Database Engine

Claims (28)

Procedure for a prepaid telecommunication service with the following steps: - first transfer a booking amount from a first telecommunication device and one first telecommunications device assigned identifier to a server, - Server-side generation of a temporary Aufbuchungskennung, - server side Storage of the temporary Booking identifier with that assigned to the first telecommunication device Identifier as key, - second transfer the temporary Booking ID to the first telecommunication device, - third transfer the temporary Booking identifier assigned to the first telecommunication device Identifier and a second telecommunications device assigned Identifier from the second telecommunication device to the server. The method of claim 1, wherein the temporary booking identifier is a Random number contains and the temporary booking identifier only in combination with the identifier assigned to the first telecommunication device is valid. The method of claim 1 or 2, wherein the temporary booking identifier a predetermined maximum length from preferably three to five Characters, especially four characters. The method of claim 1, 2 or 3, wherein the temporary booking identifier a time stamp is assigned, which is saved on the server side, and the temporary Booking ID only valid is when the third transfer takes place within a predetermined period. Method according to one of the preceding claims 1 to 4, the first telecommunication device registering on the server side and a first identifier is assigned to the first telecommunication device is, the first identifier being the phone number of the first telecommunications device and a second identifier, which is the second Identifier is a dealer identifier, and being for the first transmission the first identifier assigned to the telecommunication device and for the third transmission uses the second of the identifier assigned to the first telecommunication device becomes. Method according to one of the preceding claims 1 to 5, with a booking of the booking amount on a server side run prepaid account of the second telecommunications device takes place when the with the third transfer Temporary received on the server side Booking ID valid is. Method according to one of the preceding claims 1 to 6, with a permanent booking identifier for the temporary booking identifier is determined if the one received on the server side with the third transmission temporary Booking ID valid is, and fourth transmission the permanent booking number to the second telecommunication device. The method of claim 7, wherein the permanent charge identifier used to book a prepaid account on the server side of the second telecommunication device or the permanent booking ID is forwarded to a third telecommunication device becomes. Method according to one of the preceding claims 1 to 8, the booking amount for one the first telecommunication device managed on the server side Merchant account is recorded. Method according to one of the preceding claims 1 to 9, with the following further steps: server-side checking whether a prepaid account assigned to the first telecommunication device has sufficient credit to debit the booking amount, server-side debiting of the booking amount from the prepaid account assigned to the first telecommunication device, if the temporary booking ID received on the server side with the third transmission is valid, - server-side booking of the booking amount to a prepaid account assigned to the second telecommunication device or determination of a permanent booking ID for the temporary booking ID and fourth transmission of the permanent booking ID to the second Telecommunications Equipment. Method according to one of the preceding claims 1 to 10, with the transfers in a mobile telecommunications network, in particular a GSM, GPRS or UMTS network. Computer program product for performing a method for one prepaid telecommunication service with the following steps: - Input a booking amount and an identifier assigned to a first telecommunication device, after the booking amount and the identifier assigned to the first telecommunication device through a first transfer received by the first telecommunication device on the server side is - generation a temporary Aufbuchungskennung, - storage the temporary Booking identifier with that assigned to the first telecommunication device Identifier as key, - Output the temporary Booking ID for execution a second transmission the temporary Booking ID to the first telecommunication device, - Input the temporary Booking identifier, the identifier assigned to the first telecommunication device and an identifier assigned to a second telecommunication device after the temporary Booking ID assigned to the first telecommunication device Identifier and the identifier assigned to the second telecommunication device from the second telecommunication device after a third transmission have been received - Examination of validity the temporary Aufbuchungskennung. The computer program product of claim 12, wherein the temporary booking identifier is generated based on a random number, and the temporary booking identifier only in combination with that assigned to the first telecommunication device Identifier valid is. The computer program product of claim 12 or 13, wherein the temporary A time stamp is assigned to the booking ID, and the temporary booking ID only valid then is when the temporary Booking ID due within a specified period the third transmission is entered. The computer program product of claim 12, 13 or 14, wherein the first telecommunication device is registered and the first telecommunications device a first Identifier is assigned, the first identifier being is the number of the first telecommunications device, and the first telecommunications equipment a second identifier is assigned, it being the second Identifier is a merchant identifier, and where the first identifier for the first transmission and the second identifier for the third transmission is used. Computer program product according to one of the preceding claims 12 to 15, whereby a prepayment is made to a prepaid account of the second telecommunication device, if the temporary booking ID valid is. Computer program product according to one of the preceding claims 12 to 16, with a permanent booking identifier for the temporary booking identifier is determined when the temporary Booking ID valid and is the permanent booking identifier for a fourth transfer issued the permanent booking identifier to the second telecommunication device becomes. Computer program product according to one of the preceding claims 12 to 17, wherein the booking amount for one allocated to the first telecommunication device Merchant account is recorded. Computer program product according to one of the preceding claims 12 to 18, to check whether a prepaid account assigned to the first telecommunication device Sufficient credit to debit the additional amount to debit the booking amount from the first telecommunications equipment assigned prepaid account if that due to the third transfer entered temporary Booking ID valid and to add the amount to a second telecommunications equipment assigned prepaid account or to determine a permanent one Booking ID for the temporary Aufbuchungskennung. Computer system for a prepaid telecommunication network with: - means ( 5 ) for entering a booking amount and a first telecommunication device ( 2 . 3 . 4 ) assigned identifier (POS 1D , MSISDN) after the booking amount and the identifier assigned to the first telecommunication device have been received by a first telecommunication device due to a first transmission, - means ( 11 ) to generate a temporary booking identifier, - funds ( 15 ) for storing the temporary booking identifier, with the identifier assigned to the first telecommunication device as key, means ( 5 ) to issue the temporary booking identifier for transferring the temporary booking identifier to the first Telekommunika tion device, - means ( 5 ) for entering the temporary booking identifier, the identifier assigned to the first telecommunication device and an identifier associated with a second telecommunication device after receiving the temporary booking identifier, the identifier assigned to the first telecommunication device and the identifier assigned to the second telecommunication device due to a third transmission from the second telecommunication device. The computer system of claim 20, wherein the means for generating a temporary Booking ID based on generation of the booking ID are formed on a random number. Computer system according to claim 20 or 21 with means for assignment a timestamp to the temporary Aufbuchungskennung. Computer system according to claim 20, 21 or 22 with means ( 10 ) for registration of the first telecommunication device, the means for registration being designed in such a way that the first telecommunication device is assigned a first identifier, the first identifier being the call number of the first telecommunication device, and a second identifier, it being the second identifier is a merchant identifier (POS ID), and wherein the first means for input are designed such that the first identifier is entered as the identifier assigned to the first telecommunication device and the second input means are designed such that the second identifier is used as the the identifier assigned to the first telecommunication device is entered. Computer system according to one of the preceding claims 20 to 23 with means for booking the booking amount onto a prepaid managed on the server side Account of the second telecommunications device if that is due to the third transmission entered temporary Booking ID valid is. Computer system according to one of the preceding claims 20 to 24 with means for determining a permanent booking identifier for the temporary booking ID, if that's due to the third transfer entered temporary Booking ID valid is and third means for issuing the permanent booking ID for the fourth transmission to the second telecommunication device. Computer system according to one of the preceding claims 20 to 25 with means for recording the booking amount for a first telecommunications device assigned merchant account. Computer system according to one of the preceding claims 20 to 26 with means to check whether a prepaid account assigned to the first telecommunication device Sufficient credit to debit the additional amount has, with means for debiting the additional amount from the the first telecommunication device assigned prepaid account after due to the third transfer a valid one temporary Booking ID has been entered and to book the Posting amount on an assigned to the second telecommunications device prepaid account or to determine a permanent booking ID for the temporary Aufbuchungskennung. Computer system according to one of the preceding claims 20 to 27, the telecommunications network being a mobile one Telecommunications network, in particular a GSM, GPRS or UMTS network is.