WO2008077941A1

WO2008077941A1 - Decentralized semi-automatic callback system for mobile telecommunications terminal devices

Info

Publication number: WO2008077941A1
Application number: PCT/EP2007/064454
Authority: WO
Inventors: Christian Greulich; Richard Kaiser
Original assignee: Platform Solutions Ltd.
Priority date: 2006-12-22
Filing date: 2007-12-21
Publication date: 2008-07-03
Also published as: EP2119290A1; DE102006061371A1

Abstract

The invention relates to a method with which a callback system for mobile telecommunications terminal devices is formed in a connection-oriented mobile radio telecommunications system with an infrastructure in which the caller number can be transmitted when the connection is accepted. The method includes the following: During an incoming call, a suitable and characteristic signalling for indicating a callback request is detected using one or more suitable lists, whereupon the incoming call is rejected and a callback action is automatically carried out.

Description

DECENTRAL SEMI-AUTOMATIC RECALL SYSTEM FOR MOBILE TELECOMMUNICATIONS TERMINALS

The present invention relates to a method for realizing a callback system for mobile telecommunication terminals as well as the devices for the telecommunication terminals, e.g. in the form of hardware implemented circuit functions or a program which enables the semi-automatic application and implementation of the method; In addition, it relates to a corresponding telecommunication terminal and server system.

Existing callback systems are typically central and symmetrical systems. Central because the functionality of the callback system is grouped together in a server system, and symmetrical, because the caller requesting the callback and the party to be called are both called by the callback system and intrinsically connected. The particular advantage of such a callback system is that subscribers without a dedicated callback system can use this callback system.

The method used by callback systems is colloquially called callback and works in principle as follows: A subscriber calls a special call number of the callback system. With the call, the callback system learns the caller number, e.g. by the fixed assignment of the called call number to the call number or by the prior art call number transmission of the telecommunication networks. The calling party now announces to the callback system the call number to be called, e.g. by dialing, then hang up and wait for the callback of the callback system. The callback system dials both numbers, that of the calling and the calling party, via two separate connections and connects them system-internally, so that a call connection between both parties arises when both accept the call.

Depending on the tariff classification of a telecommunication network used, the caller incurs costs when calling the callback system, whereby the callback system operators can make this connection cheaper or even free of charge by means of special telephone numbers of the network operators for "shared cost services" or "free call". For the connections to the two subscribers to be connected, the callback system selects the respectively most favorably priced telecommunications network or network operator available to it. Because of this and because of possible special price conditions as "large In general, the call-back system allows the call-back system to offer both calls at a lower cost compared to the costs incurred by the caller by a call to the caller by their network operator Cost advantages are usually not incurred for calls within a telecommunications network of a network operator The domain of the callback systems are connections between the telecommunication networks of different network operators, in particular mobile telecommunication networks, but especially connections to foreign countries.

The conceptual disadvantage of existing systems is that, per call established, in principle one initiating call and then two simultaneous call calls are made, the cost of which, in order to be profitable and competitive, must be less than the call charge of a network operator for that call. The basic, operating and administrative costs, which must be counted towards the connection costs of a call-back system, exacerbate. A user of this system must hold two phone numbers, - those of the callback system and those of the requesting party.

It is an object of the present invention to reduce or remedy the conceptual disadvantages of existing callback systems for connections to mobile telecommunication terminals by applying a method in which a call back only needs one connection at best, by Operating and administrative costs are reduced overall by reducing the connection costs and in which a user of the recall system at best only has to hold one number - that of the requested subscriber to be called. In addition, the callback system should be expandable in a special form by suitable services and / or features and integrated into existing callback systems in order to extend them to the functionality of the inventive method.

The task solution aims, because of the particularly high cost-saving potential on recalling telecommunications terminals with a flat-rate, but is not limited thereto. This object is achieved by a callback system based on the inventive method. The method describes a decentralized unbalanced callback system for mobile telecommunication terminals, in which the mobile telecommunication terminal to call itself makes the callback, which is why this callback system is a decentralized System is, and thus only one connection, just the callback to the caller, must be established, which is why this callback system is a single-ended system. The callback, however, generally only takes place when the user of the mobile telecommunication terminal accepts the call, which requires a telecommunication terminal-specific action, eg the actuation of a key. Due to the call acceptance action to be performed by the user, this process is also referred to as semi-automatic.

The indication of a callback request may e.g. by a suitable list kept in the recalling system with authorized subscribers, or by a suitable signaling used by the calling and recalling system, which is transmitted by means of the infrastructure of the current mobile telecommunication networks or other transmission paths. The callback system rejects when the callback request is recognized when its user performs a telecommunications terminal specific action to accept the incoming call, e.g. by pressing a special key, which is why the system is called semiautomatic, the incoming connection is called off and then the caller is called back. In a basic version of the callback system, the subscriber requesting the callback does not need an inventive device on his telecommunications terminal, but only the subscriber executing the callback. In an extended version of the callback system, both the subscriber requesting the callback and the caller executing the callback require the inventive device on their telecommunications terminals.

The callback system can be supplemented by a callback system server system, which is looped into a caller and callback connection. This server system supports the inventive callback method but does not itself call back. The purpose is to bring services and / or other features into the callback system. In this expanded version with a server system supporting the callback system, this is used inter alia. the purpose of integrating appropriate services and features into the callback system.

The description of the callback systems that can be realized by the inventive method is based on two preferred embodiments: The basic feature describes a minimum system consisting of at least one mobile telecommunication terminal formed by a callback system device for the callback system, which is connected to other telecommunication terminals without a callback system. Facility, mobile and non-mobile, working together. The server specification describes a maximum system consisting of at least one mobile telecommunication terminal adapted by means of a callback system to the callback system which cooperates with other telecommunication terminals without a callback system, mobile and non-mobile, and with other mobile telecommunication terminals with a callback system Connection is preferably looped through the callback system server system and in which a large part of the potential of the inventive method is used.

The method is based on an appropriate signaling which indicates to the means of the called mobile telecommunication terminal or of the callback system server system a callback instruction, and to one or more lists for the definition, recognition and generation of suitable signaling.

In an incoming call without callback signaling, the callback system device remains passive on a mobile telecommunication terminal, thus leaving the normal functional flow available for that device, such as setting up a call connection upon actuation of a call pickup key on an incoming call without callback signaling. In the case of an incoming call with a callback signaling, and after a telecommunication terminal-specific action for the call acceptance by the user and after successful verification of recall-system-specific parameters, the callback device becomes active. It takes over the control of the mobile telecommunication terminal or takes as much influence to automatically reject first the incoming call and then perform a call back to the caller, otherwise the callback device also remains passive.

In the basic version, the caller number transmitted with the incoming call is the signaling and thus functions in all telecommunications networks with the feature for transmitting the caller number. Therefore, in order to detect signaling, the call-back system will keep listening to incoming calls and keep a list of call numbers of subscribers authorized to request a call-back called a caller number transmitted in an incoming call If the caller number is found in the subscriber list, this is regarded as verified callback signaling, which callback system is noted internally in a flag or in another suitable manner. described paragraph. The subscriber list can be empty in the initial state or contain preset subscriber numbers, for example those of a callback system server system, and can be changed and / or expanded automatically or manually by the user.

The basic feature requires only in the callback telecommunication terminal device according to the invention. In an expanded embodiment of the callback system device for server embodiment, the callback system device of a mobile telecommunication terminal is designed for reception, evaluation and optionally now also for the transmission of further signaling. The signaling in the basic form by the caller number is extended for this purpose by two further suitable signaling options: the signaling by telephone number modification by means of a change in the caller number at one or more locations and / or by an extension of the caller number, which also takes place via the connection of the telecommunications network, and a freely definable signaling via a data network connection. A call number modification is made by changing one or more phone numbers of the phone number consisting of the numbers 0 to 9 and the special characters "*" and "#" a phone number, a phone extension is created by adding or adding additional characters of the phone number in or to the phone number. This can be done in principle at any point of the phone number and it can be inserted in principle one or more characters. Practically, however, there are some issues to consider in order for the extension number to be accepted and transmitted in standard telecommunications networks. Thus, the ISDN feature "CLIP - no screening" for outgoing calls in addition to their own number to send a freely definable customer-specific call number, which is to be displayed at the recipient instead of their own phone number A Rufhummermodifikation can according to the prior art only with this or one At present, this type of signaling is limited to outgoing calls from an ISDN network.Mobile telecommunication terminals can only receive this type of signaling.A call extension that is practicable and preferred in the context of the inventive callback system is the insertion of two digits before or after Thus, in the first case using a two-digit numerical sequence XX, which is preceded by the country code, as signaling from the phone number 0049 160 1234567 or +49 160 1234567 using the Rufhummerv described Extension 00XX49 160 1234567 or + XX49 160 1234567, and in the second case using Case using a two-digit number sequence YY, which is inserted behind the country code, as signaling from the number 0049 160 1234567 or +49 160 1234567 using the described number extension 0049YY 160 1234567 or + 49YY 160 1234567. Another signaling option is the transmission a suitable bit pattern, for example in the form of a bit or number code or a data record via a data network with packet-oriented data transmission, wherein this transmission must be made prior to establishing a connection via the telecommunications network or at the same time with or at least close to this. Here, unlike the telephone number modification, there is virtually no restriction on the amount of data and the way of encoding. The telecommunication terminal must be equipped accordingly for the signaling via a packet-oriented data connection. Among other things, the Internet is suitable as a data network, whereby as a rule an access takes place via local networks such as LAN, WLAN ₃ GPRS or UMTS and also PAN or WPAN ((Wireless) Personal Area Network) such as Bluetooth. For known reasons, because of the practiced constantly changing IP address assignment for mobile devices, an Internet data connection is currently, but not in principle, useful only for connections from a mobile device to a fixed IP address assignment, ie from a mobile telecommunication terminal Data network interface to a system with an immutable IP address in a reasonable time frame. A packet-oriented data connection via WPAN between two mobile telecommunication terminals eg via Bluetooth is possible in principle, but due to the technical conception of WPAN's for short distances does not make sense. A preferred application of the signaling via a packet-oriented data connection, hereinafter referred to as the data connection, is therefore that of a mobile telecommunication terminal with a data network interface to a callback system server system. A signaling information which can be practiced and preferred in the context of the inventive callback system is a data record consisting of the caller and destination telephone numbers and optionally a keyword and / or an authentication code and / or further callback system-relevant information. The device in the Serverausprägung is extended compared to the establishment of the basic characteristic with a list of participants to further lists.

The callback system means may optionally carry in the extended embodiment another list called a substitution list. In this can be a phone number in the Subscriber list are each assigned a different phone number, which is then dialed instead of the phone number in the subscriber list. This list comes in the Serverausprägung the callback requesting mobile telecommunication terminal and in the callback system server system to wear. The purpose of the Substituierungsliste is to use transparent to the user instead of the desired recalling subscriber another number than the number entered or selected by the user, primarily for looping a callback system server system in the connection, which then the connection to the desired callback party - the description for this follows -, wherein the device replaces the call number of the recalling subscriber by the call number of the callback system server system, provided that in the substitution list the call number of the callback system server system is assigned to the telephone number dialed by the user. In the callback system server system, the substitution list is not primarily the callback system server system device, but for the realization of a special, here called number sequence service service, the substitution number can be changed by the destination subscriber, so that he eg for travel or other reasons temporarily change his phone number and still reachable for callers under the normal phone number, as long as he uses the mobile telecommunications terminal with the callback system device. However, this service is not the subject of the patent, but is only intended to illustrate the possibilities of particular services provided by a callback system server system incorporated into the call.

The initial state of the substitution list is not fixed and depends only on possible executions of the callback system device. In one possible implementation for the simplest user guidance, the list is e.g. Configured before installation for the target system and loaded with the installation invariably for the user, in a comfortable but for the user even more sophisticated execution, the list is empty or contains default entries and values and is complete or partial, automatic or manual through the Users can be extended and / or extended.

The callback system device must, in the expanded embodiment, carry a further list called a signaling list. The call numbers in the subscriber list and the optional substitution list are assigned signaling-relevant information. Signaling-relevant information is primarily the type of signaling and its signaling details. Signaling types are caller number, call number modification and data connection. Signaling details are in the signaling type telephone number- Modification eg location and type of modification in the caller number and in the signaling mode Data connection Structure and content of the data to be transmitted and details of the recipient, eg in the form of an address and / or an authentication procedure and data. The caller number signaling type is a special case because it implicitly requires the use of the subscriber list. In its simplest form, when consistent and invariable signaling details are used in a callback system, the signaling types are only appropriately enabled, disabled, or marked as enabled or disabled by means of this list. In callback systems with inconsistent and / or variable and / or freely definable signaling details, these are listed in the signaling list in a suitable manner. A variable signaling detail would be, for example, a personal authentication code for signaling over a data connection or the IP address of the data receiver.

The initial state of the signaling list is not fixed and depends only on possible executions of the callback system device. In one possible embodiment for the simplest user guidance, the list is stored, e.g. Configured before installation for the target system and loaded with the installation invariably for the user, in a comfortable but more demanding for the user the list is empty or contains default entries and values and is completely or partially, automatically or manually by the user - and / or expandable. A callback system facility of server manifestation can handle multiple types of signaling simultaneously.

In the server version, the callback requesting subscriber may also use one of the optional signaling when using a mobile telecommunication terminal equipped with the callback system facility. As already stated, the current signaling by telephone number modification is currently restricted to ISDN networks and currently not usable for mobile telecommunication terminals. However, according to the state of the art, outgoing signaling via data transmission via the Internet is possible and thus constitutes a preferred application. For this purpose, the telecommunications terminal must have an interface to the Internet, directly or indirectly via another data network, whereby Internet access via GPRS is usual and Internet access via UMTS or via wireless networks of the IEEE 802 Standard family such as WLAN, WiFi or WiMax, or even via Bluetooth, is becoming increasingly widespread. but not limited to the listed data network accesses. The callback system facility must be able to service and use these interfaces.

The purpose of using a mobile telecommunication terminal with the callback system device is primarily the effective use of the callback system server system. Although the callback system server system can also evaluate the caller number of the callback requesting telecommunication terminal as signaling, the information about the call number of the recalling mobile telecommunication terminal, also referred to below as the destination call number, is still missing in this signaling. This must be redone in a suitable manner, as in conventional callback systems, for example by dialing by DTMF or by voice over the established speech connection. Signaling via data transmission considerably improves this process by transferring all necessary information to the server system via the data connection, which takes place simultaneously or at least practicably before the connection-oriented connection is established. In the best case of pre-transmitted signaling, the server system thus knows the caller number and destination number even before the connection is established, optionally the caller's authorization and optionally further relevant information or information. This speeds up the process for the user and makes it transparent. The user no longer needs to know explicitly that he is establishing a connection with a callback system. If the user dials a telephone number, the call-back system device also "listens" here and compares it with the telephone numbers in the subscriber list. If this is available there, it checks whether the telephone number in the substitution list is assigned a different telephone number If this is not the case, the callback system could, for example, proceed as described in the basic form, ie call the destination subscriber directly using the own call number as a signaling, for which the device does not have to become active. In the primary application, the connection to the destination subscriber via a callback system. Server system, the call number of the callback system server system is assigned in the substitution list of the destination number, and this in turn the signaling type and all other relevant information is listed in the signaling list, for example, data connection as signaling and as data to be sent the caller number, destination call and an authorization string used for the authorization, eg the IMEI or a manually entered authorization code, optionally also a protocol or the data coding, eg 7-bit ASCH, sequence, encryption, etc. In this example, the device prepares the data for a data transmission and waits now, because of the semi-automatic mode of operation, to a telecommunication terminal specific action of the user for call setup, generally the actuation of the "pick-up" or "call" button. "Now only the callback system device actively intervenes in the control of the telecommunication terminal or takes over the further procedure It establishes a data connection to the callback system server system and sends it the prepared data or signaling, simultaneously or delayed, it calls the callback system server system over a telephone connection instead of the destination subscriber.

As already mentioned above, the purpose of the callback system server system is to introduce further services and / or features into a connection between callback requesting and callback subscribers. For this purpose, the connection must be looped via the callback system server system, wherein the callback system server system is connected to one or more telecommunication networks, preferably those according to the ISDN standard or comparable. In practice, this initially works in such a way that the call-back requesting subscriber calls the call-back system server system and transmits the callback request itself and the call number of the callback subscriber by means of suitable signaling. The appropriate signaling has already been described and explained with reference to the callback system device for mobile telecommunication terminals. To recognize the signaling, the callback system server system therefore first requires a callback system device with at least one subscriber list and at least one signaling list. The number of lists depends on how the lists are organized for many callback systems. Thus, e.g. the call numbers of all subscribers authorized for a callback request are summarized by the server system in a subscriber list, or a subscriber list is kept for each known and / or registered callback subscriber.

Thus, an incoming call is also immediately checked for signaling by the call-back system device, that is, whether the caller number is in the subscriber list or if signaling is provided by a call volume modification listed in the signaling list, or if now or optionally until at the latest after a suitable call Waiting time is a valid after the signaling list signaling by data transmission, which refers to the caller number. If the signaling of a callback request is detected, the further procedure differs depending on the type of signaling. First, the incoming call of a callback requesting subscriber is either not yet accepted or accepted and held.

In the signaling by the caller number is missing the specification of the destination number. In principle, a caller number can also be assigned a callback number by means of the substitution list, but only a single one for the sake of clarity. The assignment of the caller number to more than one callback number would be ambiguous. Although this highly restrictive option is practicable, it is undesirable in the sense of an open recall system. Furthermore, there is the possibility of dialing the destination by dialing, e.g. by DTMF-coded number transmission over the voice connection to transmit. This is also practicable but is also considered a subordinate option in the sense of the semi-automatic operation of the inventive callback system. The signaling mode of the call number signaling on incoming calls is therefore secondary to the callback system server system. A call with call number signaling or invalid signaling or without signaling is expediently forwarded internally to a common callback system, which may also be implemented as a supplementary application on the callback system server system, or e.g. to an automatic announcement or rejected.

The signaling by Rumummermodifikation is subject in principle, because with the signaling no destination number is transmitted, the same restrictions as by calling number signaling. As with this, there is the possibility of the destination number by dialing, so e.g. by DTMF-coded number transmission over the voice connection to transmit. This is also practicable but is also considered a subordinate option in the sense of the semi-automatic operation of the inventive callback system. The signaling mode of the call number modification for incoming calls is therefore secondary for the callback system server system.

The preferred type of signaling for incoming calls is therefore that of the data transmission for the callback system server system. For this purpose, the callback system server system can be reached under at least one fixed address in the packet-oriented data network. This is the preferred data network in the Internet as an IP address which can be reached for mobile telephony terminals with a data network interface if the mobile telecommunications terminal devices commonly used in local wireless data network technologies such as GPRS, UMTS, WLAN and Bluetooth provide connections to the Internet. However, this is state of the art. Signaling by data transmission transmits at least the caller and destination call numbers to the callback system server system and preferably takes place before or at the same time as the call via the connection-oriented connection, but no later than a tolerable time thereafter. The caller number is needed so that the callback facility can assign the signaling to an incoming call. On the basis of the subscriber list, the callback device checks the authorization of the callback requesting subscriber. If authorized, the callback device checks whether the destination number is registered in the callback system server system. If this is registered, the callback device uses the substitution list to check whether there is a substitution number for the destination phone number. If this is the case, the destination number is replaced by the substitution number. However, the substitution list is not essential for the callback system and therefore only optional. Based on the signaling list, the call-back system device finally determines the signaling type and details thereof for the signaling to the callback system with the destination phone number. The callback system device only calls the destination subscriber using the signaling given on the basis of the lists, if all checks in the sense of the callback system are positive; otherwise, as already described, it is advisable internally to a conventional callback system, which also serves as a supplementary application on the callback system Server system can be implemented, forwarded or, for example, to an automatic announcement or the incoming call from the callback requesting participant is rejected.

The preferred type of signaling of the call-back system server system for outgoing calls is that of the telephone number modification. By means of the ISDN feature "CLIP - no screening" or a comparable instead of the own number, the call number of the callback requesting subscriber as a caller number sent using the already described preferred extension number, ie with the two-digit number sequence XX, eg "99" before In the preferred use case, the response to signaling by the preferred call extension is defined uniformly in the callback system, meaning that the callback system server system is to be recalled regardless of the caller number For callers, this signaling has the special advantage of being able to display the caller's telephone number and not that of the callback system server system. terminal, the incoming call is rejected by the callback system server system due to the signaling, and then the callback system server system is called back. With the signaling type of the call number signaling, the caller number can not be transmitted instead of the call number of the callback system server system and therefore does not offer the transparency as in the call number modification. Although the desired transparency can be achieved with the type of signaling of the data transmission, for the reasons already described, the problem of addressability of a mobile telecommunication terminal in a packet-oriented data network, it is currently not meaningful.

The callback system server system waiting for the callback connects call-back requesting and callback subscribers as soon as the connection to the callback subscriber has been established.

In principle, the callback system server system offers the possibility of interfaces to various telecommunications networks and, in principle, can connect these internally and thus across networks. For example, the callback system server system makes it possible to internally connect the callback requesting connection from the mobile network A with the callback connection from the mobile network B, thus saving the generally high network transfer costs between different mobile networks. The savings potential becomes even clearer if the connection is established across national borders, that is to say if, for example, the callback requesting connection from mobile network A in state X with a server of the callback system server system in state X server internally with the callback connection from the mobile network B in State Y connects to a server of the callback system server system in State Y, which typically spares network transfer costs and roaming costs. However, this feature is not the subject of the patent, but is merely intended to illustrate the possibilities of particular performance features through a callback system server system incorporated into the call.

The call sequence service already mentioned in the description of the substitution list is also a service provided by the callback system server system and, although not subject to the patent, is intended to illustrate the possibilities of particular services by a callback system server system incorporated into the call.

As a special case, the likewise practicable signaling type of the caller signaling of the callback system server system represents outgoing calls Callback system server system the call number of the callback requesting subscriber as a caller number by means of the ISDN feature "CLIP - no screening" or a comparable, instead of their own phone number, but in contrast to the previously described preferred signaling without a phone number extension or - Modifϊkation The callback system sees in the target device Therefore, if the caller number is listed in the subscriber list, it calls the callback requesting subscriber directly, as described in the basic form. Server system is known, for example, on the basis of its own fee determination and calculation, that the direct callback is cheaper than the mediated and / or if the calling party would like to have this expressly so The type of signaling is denied accordingly listed in the signaling list of the callback system server system. The callback system server system must identify itself by means of the information in the signaling list, or it must be indicated to it by means of a suitable feature in the signaling list or in another suitable list that the incoming call of the callback requesting subscriber in this case must be rejected. For the callback requesting subscriber, this call is as described in the basic form. This construct represents a special case of a service feature because this service can be offered by the callback system server system, even though it is not looped into the connection.

In contrast to the basic feature, the call-back system device of the callback telecommunication terminal in the server version is capable of receiving all three types of signaling. By means of the signaling list, the activated signaling modes are deactivated or activated and defined, as far as they are not defined by default. As already stated before, for callback mobile telecommunication terminals, the type of signaling by telephone number modification is the preferred type of signaling because of the possibility of the callback system server system, by means of the transmission of the call number of the callback requesting subscriber as a customer-specific number by the ISDN feature "CLIP - no screening", or a This possibility does not exist with the principally also usable signaling by the caller number and with the use of the subscriber list The signaling type of the data transmission offers this possibility, but is because of the reasons already mentioned above, the problem of Addressability of a mobile telecommunication terminal in a packet-oriented data network, currently not useful.

The customer-specific telephone number transmitted in the preferred signaling mode of the telephone number modification is usually displayed as a function of the control of the mobile telecommunication terminal or a name in plain text if the number with name assignment is stored in the telephone book of the mobile telecommunication terminal. The telephone number extension used in the preferred signaling by the digit sequence XX before or YY after the country code does not interfere in practice, because usually numbers are compared with those in the phone book from the right in the operating program of the mobile telecommunication terminal, so that the extension number (left of) the provider code or area or area code usually has no relevance, because an identity at the latest with the Netzbzw. Area code can be determined. Therefore, the operating systems of mobile phones for name search in their directories usually evaluate only the last seven digits of a phone number. However, this behavior can not be influenced by the recall system and thus can not be guaranteed.

The recalling functionality of the callback system control does not require a substitution list, because an incoming signaling is assigned in the signaling list the call number of the callback system server system to be recalled. This is not a phone number substitution. However, the callback system may include a substitution list if it also exercises or maintains callback requesting functionality.

The procedure for an incoming call is otherwise analogous to that described in the basic form.

In the case of an incoming call without callback signaling, the callback system device remains passive on a mobile telecommunication terminal, thus leaving the normal functional sequence available for this device, for example establishment of a call connection upon actuation of a call pickup key on a coming call without callback signaling. In the case of an incoming call with a callback signaling, and after a telecommunication terminal-specific action for call acceptance by the user and after successful verification of callback system-specific parameters, the callback device becomes active. It takes over the control of the mobile telecommunications terminal or takes as much influence to automatically Initially refuse the incoming call and then perform a callback to the caller, otherwise the callback device also remains passive.

Execution and realization of the lists described by means of individual lists is not limited to the form described. The lists can, individually or in summary, realized in circuit technology or program technology, be present in any suitable form.

The advantage of the inventive method over the known prior art is that the inventive method for a callback system for mobile telecommunication terminals in the basic version in contrast to conventional call-back systems does not require a central callback system server. The basic feature requires only in the callback telecommunication terminal device according to the invention.

By the inventive method, mobile telecommunication terminals themselves become the callback system. Based on the typical connection methods of centrally operated callback systems, in which two separate connections are connected in the central callback system, a connection is saved with respect to these. In particular, the method offers, however, for certain tariff-dependent situations, a large potential for tariff cost savings, namely when the connections of the recalling mobile telecommunication terminal by means of a volume-independent tariff, a so-called flat rate, billed, and thus for the callback only a contribution part of the tariff base costs and the caller himself does not have a flatrate tariff or other similarly favorable tariff. In principle, a tariff cost saving occurs when the tariff of the caller is cheaper than that of the caller, or when the caller calls out of the fixed network, because typically the billing rates of the telecommunications providers are such that a call from a mobile network in a fixed network cheaper is as the other way around.

The primary target group for the basic characteristics of the procedure is therefore the mobile phone user with a flat rate. Assuming that a user books his flatrate tariff independently of the use of the inventive callback system, the user only incurs the cost of the purchase or additional charge of the inventive callback system.

The Serverausprägung offers the ability to realize and offer special services for connections of the inventive callback system and / or Other features such as the ability to offer and use any low-cost connections across networks and states. However, in the server embossing of the inventive callback system, callback connections, as in the usual callback systems, consist of two separate connections. The lost advantage of only one connection per callback connection is offset by the advantages of the services and / or features available as a result.

The following principal differences to traditional callback systems can be identified: i. The innovative callback system is a decentralized system. ii. Compared to traditional callback systems, in the basic version of the inventive method, the costs are shifted from the caller or the subscriber who initiated the call to the called party or caller who makes the callback. In the Serverausprägung, on the other hand, there are fee-based connections for both subscribers. iii. In both versions, the costs of a callback only arise for the network operator of the participating parties. There are no extra callback connections for the payroll hierarchy.

A callback system in its basic form is regarded as a preferred embodiment of the invention. A callback system in the server manifestation is considered to be a preferred advanced embodiment of the invention.

Features and details of the inventive method of a callback system are illustrated by the following pictures. Hereby show:

1 shows a schematic representation of the inventive method of the callback system in the basic and server version, FIG. 2 shows a mobile telecommunications terminal with the device for the inventive callback system, FIG.

3 shows a server representative of a server system with the device for the inventive callback system,

Fig. 4 signaling types and transmission paths of the signaling. Legend for the Components in the Drawing Fig. 1: 1, 4: Mobile telecommunication terminal, such as a GSM mobile phone, but not a cordless phone on a landline such as a DECT phone, with the inventive device of the callback system.

2: Mobile telecommunication terminal, e.g. a GSM mobile phone, but not a cordless telephone on a landline such as a DECT phone, without the inventive device of the callback system.

3, 5: Landline telephone or cordless telephones on a landline such as e.g. a DECT phone.

6: Mobile telecommunication terminal, e.g. a GSM mobile phone, but not a cordless telephone on a landline such as a DECT telephone, with the inventive device of the callback system and with a data network interface such as e.g. GPRS, WLAN or Bluetooth.

7: telecommunications server or server system with the inventive device of the callback system without their callback functionality and additionally with a forwarding and connecting functionality.

In Fig. 1 by way of example the basic operation of the inventive method of the callback system in the basic form of the components 1 to 3 is shown.

The principle of the basic feature is based on the fact that a subscriber A with a telecommunication terminal 2 or 3 knows that a known subscriber B with a

Telecommunications terminal 1 can be called by means of a callback system.

This is done e.g. in that B communicates this to A verbally. B must be callback system for

Initialize A by calling the number of the telecommunication terminal 2 or 3 of

A enters the subscriber list of the callback system in its telecommunication terminal 1. If A now wants to call B, then as usual he dials the number of B, but knows that the call is rejected and he is immediately called back by B. With the call setup to the telecommunication terminal of B is through the infrastructure of the

Telecommunications network and the caller number the receiver 1 transmitted. The

In the basic form, the caller number serves as a signaling for a callback request. The callback system device in Fig. 1 "listens" to incoming calls and immediately checks to see if the caller number is listed in the subscriber list. If not, then the callback system in Fig. 1 remains in place

History of the connection establishment passive. If so, the facility is waiting for an action from B to accept the connection, which can be done by, for example, pressing a device-specific "talk-off" key or a voice command .. Only after this action does the callback system facility take control or affect the terminal control to the extent that now automatically all necessary actions for a call back This is done by first rejecting the incoming call so that there is no chargeable call, and then immediately call the caller number back in. B must wait until A accepts the call, and the caller system device will control it An exemplary use case of the basic feature is a prepaid tariff child mobile phone and a parent cell phone having the inventive callback system facility and a flat rate tariff which also provides for connections to the child mobile phone cellular network Wirks If the child calls the parent mobile phone by means of the child mobile phone as a known and authorized subscriber of the callback system, the child is called back to the practically free flatrate tariff, which is at least much cheaper considering the basic costs.

In Fig. 1 is further exemplified the basic operation of the inventive method of the callback system in the Serverausprägung based on the components 4 to 7 shown. The principle of the server characteristic is based on the basic characteristic. In this case, further types of signaling can now be used. The connection to the recalling subscriber is preferably routed via the callback system server system 7 called subscriber C.

The principle of the server characteristic is based on the fact that the telecommunication terminal 5 or 6 of a subscriber A knows that a known subscriber B can be called with a telecommunication terminal 4 by means of a callback system. While the subscriber A on a callback request to subscriber B in the basic characteristics of the callback system on it and therefore should be prepared that his call is initially rejected and he now has to wait for the callback of B, the same connection recording is running in the Server version of the callback system in the preferred application now semiautomatic led over subscriber C or the callback system server system 7, transparent for A from. E either hears the ringing tone until C connects it to the now available connection to B, or A For example, if an immediate call is accepted by C, a suitable automatic announcement is heard, such as "Please wait" until the connection can be switched to B. Due to the transparency of the callback system and suitable subscriber information by the callback system server System 7, the callback system must be activated user A no longer knows that he is using this callback system.This case occurs, for example, when another person uses subscriber A's mobile phone for a call and calls a callback system subscriber registered in the callback system facility of the mobile telephone.

As in the basic version, a subscriber B must first verbally inform a subscriber A that he can be called by means of the callback system. In this case, mutually the numbers and from B to A further details on the type of signaling communicated, because compared to the basic characteristics must now be initialized in the server version in the preferred application in which both participants mobile telecommunications terminals with the callback system device, both callback system facilities , In practice, this is such that A inputs and stores the telephone number of B in the subscriber list of his mobile telephone with the callback system device and assigns the call number of C to the substitution list and the type of signaling for the connection to C in the substitute list Signaling list. This one-time operation can be made very simple, depending on the complexity of the menu navigation and option management of the recall system, e.g. by activating a simple setting option "via server" in the settings menu of the callback system, in which case the number of A in the substitution list is automatically assigned to the call number of the callback system server system and again automatically default entries in the signaling list for this connection.

B must enter the telephone number of the telecommunication terminal 5 or 6 of A in the subscriber list of the callback system in its telecommunication terminal 4. Furthermore, for the preferred signaling of the Rufhummermodifikation by a "99" for example for the two-digit number sequence XX before or a "12" for example, for the two-digit number sequence YY after the country code in the signaling list the call back to C, the call number from the callback system- Server system 7, registered. This is identical for every callback request made via C, which is why this can also be implemented as the basic setting of the callback system and is no longer used by the user. which must be carried out. However, B must also inform C in a suitable manner about the authorization of A as the callback requesting subscriber, so that the relevant lists in the callback system server system are initialized accordingly.

The transmission of the initialization data and the initialization of the participating callback system facilities can be done instead of verbally or manually in any other common and appropriate form. By means of a suitable interface to the user, e.g. This process can be centralized and simplified by means of a specific telephone service or via a special internet page or via a special initialization menu in the callback system device in the mobile telecommunication terminals, in which the input is only made at one point by the calling subscriber B and the corresponding ones Data in form eg a configuration SMS is sent to all other participants involved.

If A now wants to call B, then he dials as usual the telephone number of B. If B is a recall system known to the call-back system in A's mobile telephone, then it becomes active after the call button has been actuated or through a corresponding connection. It replaces the telephone number of B with that of C and calls C instead of B. At the same time it signals according to the information of the signaling list C the callback request and the destination telephone number. In Fig. 1, the mobile telephone 6 signals via a data network and the landline telephone 5 via the connection-oriented connection, this must be done via call number signaling, because a landline phone by definition can not have the inventive device of the callback system. This is also just an optional application, not the preferred one. However, the mobile phone 6 could also signal by means of call number signaling or by means of modified call number signaling via the connection-oriented connection. Once the callback system server has received the signaling and also the incoming call of the caller specified in the signaling A, recognizable by the caller ID, calls and signals itself B, provided positive identification and verification of A and B, and waits for the call rejection and then on the callback by or from B. The upcoming call from A is not yet accepted or accepted and issued an automatic announcement to A, informing him that the connection is made equal, eg "Please wait!".

With the preferred signaling by telephone number modification, with the call setup to B by the infrastructure of the telecommunications network by means of the specific call number both the caller number, ie the phone number of A, and the indicator for a callback request from C, the number used in the example "99" before or the "12" after the country code transmitted. Subscriber B thus sees in the display of his mobile phone the coming call of telephone number A or the name of A ₃ if this is assigned to the telephone number of the mobile phone. The callback system in his mobile phone already checks the signaling at this time based on the lists. If the test results in a positive result, ie if the callback requesting subscriber A is authorized for this purpose and fulfills further relevant aspects, the callback system becomes active as soon as B accepts the call by pressing the call acceptance key or by a corresponding procedure. It rejects the coming call of C, so that no toll call connection arises, and immediately calls itself back C. Subscriber B thus hears a ringing tone after picking up, which can be replaced by a specific tone or tone sequence under the control of the callback system device but also for the indication of a callback setup. Once the callback system server system detects B's coming call, it establishes a connection between A and B in-server. It can not execute a callback, but only mediate.

An exemplary use case of the Serverausprägung is that of a frequently traveling person A, for example, a sales representative of a company XYZ with a mobile phone and a phone number RNA, under which he should always be reachable, even if he is abroad and there another SIM and RNC number of a local provider uses. Other sales representatives and family members and friends should always reach him by means of a mobile phone under the number RNA. This is possible inexpensively by means of the callback system in the server version using a so-called Rufhummerfoli- service by substitution list. For this purpose, the mobile phones of all persons involved must be equipped with the callback system device and their lists are initialized accordingly. In the callback system server system A always stores the phone number under which he is currently reachable, so RNA, as long as he is logged in the home network, and any number RNC, as long as he is logged into the network. If an authorized subscriber B now calls the telephone number RNA, then the call diverted by the callback system to the callback system server system is forwarded there to A by means of the callback method, regardless of the caller's number currently having it communicated to the callback system server system. Caller B only ever receives the code into the landline to the callback system server system. Depending on the tariff used by A, this or his company also incurs the costs for the callbacks from the current mobile network to the fixed network. This also applies abroad if a server of the callback system server system is stationed there. This eliminates the roaming costs.

Claims

A method of forming a mobile telecommunication terminal call-back system in a connection-oriented mobile telecommunications system having an infrastructure in which the caller number can be transmitted upon connection, the method comprising: upon an incoming call, appropriate and distinctive signaling identified for the indication of a callback request on the basis of one or more suitable lists, and then rejected the call and automatically carried out a callback.

2. The method of claim 1, wherein in the callback system of the mobile telecommunication device for identification of participants to be called a subscriber list with numbers of such subscribers and optionally assigned to the subscriber number substitution is performed, the Rufnummersubstituieruπg has priority over the subscriber number, and a signaling list with the signaling for the phone numbers or their phone number substitutions is performed, or a corresponding combined list.

3. The method of claim 1 or 2, wherein after the recognition of a callback request Ruf rejection and recall only takes place when a user has performed a telecommunications end device specific connection establishment or connection acceptance of the coming call, such as a confirmation by the user, so this system Also referred to as semi-automatic.

4. The method according to any one of claims 1 to 3, wherein the Rückrufϊünktionalität is effected by an addition to the conventional control of the telecommunication device, which takes over the control of the recognition of a callback request and possibly after user confirmation to the effect, or to the extent influence on them that the incoming call rejected and automatically the recall is performed.

5. The method according to any one of claims 1 to 4, wherein the signaling is transmitted on the telecommunication channel with the coming call or simultaneously or promptly with the coming call over any data connection, and characterized in that the signaling either i. done by the caller number itself, ii. or in the form of one or more digits with which a telephone number is extended, the extension being made by adding or adding at one or more digits of the telephone number, iii. or in any suitable form when transmitted over a connection other than that used for the voice connection.

6. A method of a callback system for mobile telecommunications terminals in any connection-oriented mobile telecommunications system with an infrastructure in which the caller number is transmitted at the connection recording, or also in a packet-oriented mobile data network, which are adapted to an outgoing call, if the target subscriber is recognized by means of one or more suitable lists as a recalling subscriber of the callback system, semiautomatically generate a suitable and characteristic signaling for the indication of a callback request and at the same time with the call setup or timely transfer to the destination subscriber and for this purpose the control of the mobile telecommunication terminal or to the extent that it influences, in order to carry out the necessary actions.

7. The method of claim 6, wherein in the callback system of the mobile telecommunication device for identification of callback participants of the callback system a subscriber list with phone numbers of such participants and optionally assigned to the subscriber phone number substitution is performed, the phone number has priority over the subscriber number, and a signaling list with the Signaling for the numbers or their number substitutions is performed, or a corresponding combined list.

8. The method of claim 6 or 7, wherein the acquisition or influence on the control of a mobile telecommunication terminal takes place only when a

User has performed a telecommunications terminal specific action to establish a connection of the outgoing call and if the destination number is recognized as a subscriber of the callback system based on one or more suitable lists, so this system is referred to as semi-automatic.

9. The method according to any one of claims 6 to 8, wherein a suitable and characteristic signaling for the indication of a callback request either i. the caller number itself is, ii. or in the form of one or more digits with which a telephone number is extended, the extension being made by adding or adding at one or more digits of the telephone number, iii. or may have any suitable form when transmitted over a connection other than that used for the voice connection, the signaling being transmitted either on the outgoing telecommunications channel or simultaneously or promptly with the outgoing call over any wireless data connection ,

10. Method according to one of claims 1 to 9, wherein supporting server system, referred to as callback system server system, in all possible forms such as N server system, single server or telecommunication terminal device with server functionality in any connection-oriented telecommunication system with an infrastructure in which the call system and caller number when the connection is being recorded or extension or block dialing are possible, or additionally in a packet-oriented data network, which is adapted to suitable and characteristic signaling for indication of a callback request to a destination subscriber based on one or more suitable lists in an incoming call recognize and automatically i. Initially, the incoming connection of the callback requesting subscriber does not accept or accept and hold or park, ii. via a new connection by means of the received destination number calls the recalling destination subscriber or an optional other recalling destination subscriber, designated by a suitable list, and thereby uses or uses the signaling defined for the destination subscriber on the basis of suitable lists, iii. expects the called party to call back to reject the call and then call back, iv. upon recall of the recalling destination subscriber, this incoming connection and the as yet unidentified or the held or parked incoming connection of the callback requesting subscriber interconnects so that a call is established from the caller to the caller, and at any stage of such mediation, until the disconnection or even beyond, for each of the subscribers, separately or for both together offering suitable services and / or features.

11. The method according to claim 10, wherein in the callback system server system for the identification of authorized callback request participants of the callback system a

Subscriber list with numbers of such subscribers and optionally a subscribers assigned phone number substitution is performed, the number has priority over the subscriber number, and one of these lists associated lisierungsliste with the signaling for the phone numbers or their number substitutions is performed, and / or for identification of call-back participants of the callback system another subscriber list with phone numbers of such participants and optional assigned to the subscriber phone number substitution is performed, the phone number substitution has priority over the subscriber number, and one of these lists associated with signaling list with the signaling for the phone numbers or their phone number substitutions out or one or more correspondingly combined lists.

12. The method according to claim 10 or 11, wherein a suitable and characteristic signaling for the indication of a callback request either i. the caller number itself is, ii. or in the form of one or more digits with which a telephone number is extended, the extension being made by adding or adding at one or more digits of the telephone number, iii. or may have any suitable form when transferred via a compound other than that used for the speech connection, iv. or a special call lender of the callback system server system, wherein the signaling is either received on the telecommunication channel of the incoming call or transmitted on the telecommunication channel of the outgoing call or simultaneously or promptly received with the incoming or outgoing call via any data connection or is sent.

13. A method of a callback system, characterized in that in the Grundausprägung the callback system this consists only of mobile telecommunication terminals according to claims 1 to 9 and the caller number is used for signaling, and the callback service of any, no method of the callback system dominating telecommunication terminals in arbitrary connection-oriented mobile or non-mobile telecommunications systems with an infrastructure in which the caller number is transmitted when connecting, can be used.

14. A method of a callback system, characterized in that in a further embodiment of the callback system this consists only of mobile telecommunication terminals according to claims 1 to 9 and no restriction on the manner of signaling, and their callback service also from telecommunications terminals according to claims 1 to 9 and / or by means of signaling by the caller number of any, no method of the callback system dominating telecommunications terminals in any connection-oriented mobile or non-mobile telecommunications systems with an infrastructure in which the caller number is transmitted when connecting, can be used.

15. A method of a callback system, characterized in that in a Serverausprägung said further expression of the callback system callback systems according to claim 14 to a callback system supporting callback system server system according to claims 10 to 12 extended.

16. A device for mobile telecommunication terminals, consisting of a program or a circuit-implemented or logic-implemented hardware control, which gives the mobile telecommunications terminals the functionality of a recalling subscriber of the callback system according to the method in claims 1 to 12.

17. A mobile telecommunication terminal, formed to the recalling subscriber of the callback system according to method in claims 1 to 15 and a device or devices according to claim 16 or 17.

18. A server system configured for the callback system supporting callback system server system according to the method of any of claims 10 to 12 and an apparatus according to claim 16.