WO1997035392A2

WO1997035392A2 - Circuit arrangement for a telecommunication switching system, in particular a telephone switching system, and method of producing the telecommunication connections

Info

Publication number: WO1997035392A2
Application number: PCT/EP1997/001358
Authority: WO
Inventors: Albert Peitz
Original assignee: Peitz Gmbh
Priority date: 1996-03-18
Filing date: 1997-03-18
Publication date: 1997-09-25
Also published as: EP0888078A2; WO1997035392A3; CN1214176A; AU2157797A

Abstract

The invention concerns a circuit arrangement for a telecommunication switching system, in particular a telephone switching system, in a single or multi-level network comprising first switching systems of a first lower-order hierarchical level and optionally at least second switching systems of a second higher-order hierarchical level, it being possible to connect subscriber lines to the first switching systems. In a multi-level network the switching systems of a higher-order hierarchical level are each connected to at least two switching systems of the hierarchical level arranged therebelow. Associated with each switching system of the network is a memory in which data about the line location of all the network subscribers can be stored. Triggered by a message which designates the availability of a subscriber at any subscriber's station in the network at which the message is input, address data designating the line location of this subscriber's station are generated and registered in an associated memory row corresponding tothis subscriber. In a network having at least one further hierarchical level, data designating the switching system of the lower-order hierarchical level are generated and registered in a memory row corresponding to this subscriber, of the associated switching system of the further hierarchical level. The circuit arrangement, designed as an external computer, can be connected via at least one signalling interface module to the switching system, signalling data being exchanged with the switching system via this signalling interface module. Associated with the computer is the memory which comprises a first memory area which can store first data designating the presence of subscribers at any given moment, and a second memory area which stores second data designating the line location of the subscriber's station at which a predetermined subscriber can be reached at any given moment.

Description

Circuit arrangement for a telecommunication switching system, in particular a telephone switching system and method for the production of telecommunication connections

The invention relates to a circuit arrangement for a telecommunications switching system, in particular a telephone switching system according to the preamble of claim 1 and a method for producing telecommunications connections according to the preamble of claims 13 and 15.

A circuit arrangement for switching systems is already known from German patent application P 39 21 637.3, in which mobile subscriber stations can be connected in a fixed manner with respect to the relevant switching station either to one of several switching stations via subscriber lines or via subscriber-specific wireless connections. In this context, it is provided that information is not stored in all the end exchanges, which indicates which home location register is the "responsible" for each of the existing subscriber stations. Memory is provided for each end office, in which only information is stored which indicates which subscriber stations are currently connected to the relevant end office. Corresponding memories are also provided in the intermediate exchanges, with information being stored in these memories which indicates which subscriber stations are currently connected to which only the hierarchically subordinate end office. The known switching center makes it possible to reduce the switching outlay for the production of telecommunications connections. The reduction is essentially achieved in that when establishing telecommunication connections, search messages for a desired B subscriber do not go through the whole Interconnection network are to be transmitted, but that search messages are only from the originating end exchange and then only if necessary via hierarchically directly superior intermediate exchanges.

In the aforementioned German patent application P 39 21 637.3 it is assumed that conventional, that is to say wired, subscriber stations, but also mobile subscriber stations, are permanently assigned to a terminal exchange.

From the German utility model G 94 04 477.5, a circuit arrangement for telecommunications switching systems, in particular telephone switching systems, is known in a one- or multi-stage network. First switching systems of a first, lower hierarchical level are provided in the network and, if appropriate, at least second switching systems of a second, higher hierarchical level, subscriber lines being connectable to the first switching systems. In a multi-level network, the switching systems of a higher hierarchical level are each connected to at least two switching systems of the hierarchy level arranged below. A memory is assigned to each switching system in the network, in which information about the connection location of all participants in the network can be stored. The circuit arrangement is assigned to one of the first switching systems, the circuit arrangement having a control unit with a control program. This control program is designed in such a way that triggered by a message which indicates the accessibility of a subscriber at a subscriber station, at which the message is entered, which is any subscriber station of the network, an address information characterizing the connection location of this subscriber station is generated and is entered into a line of the associated memory assigned to this subscriber. In a network with at least one further hierarchical level, the generation of information that designates the switching system of the lower hierarchical level is triggered, and the entry of this information in a line of the memory of the associated user that is assigned to this subscriber. The switching system of the further hierarchy level is initiated. This circuit arrangement known from German utility model G 94 04 477.5 can be integrated into existing switching systems or can be implemented by a personal computer that can be connected externally to a switching system. However, the procedures to be carried out in this connection are complex.

On the basis of this prior art, the invention is based on the technical problem of specifying a circuit arrangement and a method of the type mentioned at the outset, which enable any changes in the assignment of subscriber stations to terminal exchanges with comparatively little computing effort.

According to the invention, this problem is solved by the features defined in the claims.

The invention is characterized by a number of advantages.

The advantages achieved with the circuit arrangement according to the German utility model G 94 04 477.5 are fully retained: for example, the goal of complete mobility, which is that each subscriber station can be connected to any terminal exchange, is implemented with a comparatively low storage capacity in the switching systems achieved. If you assume, for example, 32 million subscribers in a network in which the circuit arrangement according to the invention is used, only a memory of approximately 4.2 Mbytes is required in each terminal exchange, even if a terminal exchange has up to approximately 65,000 subscriber accesses ( Households / office units). 1 bit is provided for each subscriber of the network, while for the subscribers actually present in this terminal exchange system, for example, 2 bytes are required in an information register. In a next higher network level, a note register with a length of 1 byte is sufficient for the participants present, provided that the number of end switching systems serving such a switching system of the next higher level is not greater than 255. In an even higher network level, half a Byte byte registers per switching system if a number of 15 switching systems is not exceeded for a switching system of the next lower level

A further advantage is that the switching outlay for the establishment of telecommunications connections is not increased compared to the circuit arrangement from the German utility model G 94 04 477.5. The circuit arrangement according to the invention and the inventive method furthermore reduce both the circuit-internal or computer-internal procedures and the memory requirement required for managing the corresponding data. Due to the separation of two separate memory areas, a presence bit bar (STL) and so-called information fields or location registers (LR), 12.5 megabytes of storage space for the presence bit bar is required, for example, in a network with 100,000,000 subscribers, to manage all attendance data for all of this group of participants. In contrast, the number of information fields is comparatively small, since z. For example, in a network with usually more than 2000 switching centers, only 1/2000 of all subscribers have to be managed on average. Experience has shown that local calls are predominantly conducted in a local network and the mobility of subscribers who are managed in the information fields is also limited to the local area. This means that the (mandatory) data (compared to presence bit bar data) can be used in the Usually manage locally. Only in exceptional cases, e.g. when a participant changes location from Munich to Hamburg, a change in the information field data that goes beyond the area is required.

Another advantage in practice is that the decision as to whether a call should be forwarded to the next higher switching system hierarchy level or whether it remains in one's own area is made by a single routine. The method according to the invention therefore manages with an extremely low dynamic system load. This advantage is all the more pronounced the larger the number of switching systems in a network. Preferred embodiments of the invention will now be described with reference to the drawings. It shows

FIG. 1 shows an exemplary embodiment of a multi-stage first network and a second network with the circuit arrangement according to the invention;

FIG. 2 shows the assignment of information registers to switching systems in the first network according to FIG. 1;

FIG. 3 shows a further illustration of the interaction of the information register according to FIG. 2 when establishing telecommunication connections;

FIGS. 4 and 5 embodiments of the circuitry or functional structure of the circuit arrangement according to the invention; and

FIG. 6 shows a dialing keyboard and a chip card reader of a terminal (subscriber station) in the telecommunication dialing network for the simple entry of information identifying the respective connection location.

FIG. 1 shows an exemplary embodiment of a multi-stage first telecommunications dialing network NI with a plurality of switching systems which are arranged in different hierarchical levels. Terminal exchanges or local exchanges OVSt (Fig. 2) El, E l ', E2, E3, E4 are arranged in a first, lower hierarchical level. Switching systems, in particular node switching centers KVSt (FIG. 2) Z31, Z32,... Z39 are arranged in a second hierarchical level, which is superordinate to the first hierarchical level. Switching systems, in particular main switching centers HVSt (Fig. 2) Z21 ... Z28 are arranged in a further, higher third hierarchical level. A fourth hierarchy level is through Switching systems, in particular central switching centers ZVSt (Fig. 2) ZU, Z12 are formed.

The switching systems of the second, third and possibly a higher hierarchy level are preferably connected to at least two switching systems of the hierarchy levels respectively arranged below. For example, the switching system Z31 is connected to the switching systems El and El ', while the switching system Z21 is connected to the switching systems Z31, Z32 and Z32. For reasons of clarity, the corresponding connections to one another are not shown in FIG. 1 for all switching systems.

Circuit arrangements SML1, SML2 are each connected to all switching systems ZU, Z12 of the top hierarchical level. Their structure and function are described below.

Subscriber stations T1 ... T6 are connected to the end switching systems, as is shown schematically in FIG. 1. The subscriber stations can be conventional, wired subscriber stations or radio subscriber stations.

Private branch exchanges NST1, NST2 can also be connected to the aforementioned switching systems of all hierarchical levels, with the extensions NT11, NT21 being managed like the other subscriber stations T1, ....

The exchanges El, ...; Z31, ...; Z21, ... is a memory or register S1, ...; S31, ...; S21, ... assigned. In Figure 1, this is only shown for the switching systems El, Z31 and Z21.

In FIG. 1, circuit arrangements C1, C31 and C21 are also shown schematically. These circuit arrangements have the same function. Each circuit arrangement according to the invention has a control unit C1 CPU, C31 CPU or C21 CPU with an associated control program, the configuration of which is described further below. An international gateway exchange device (IGE) which connects the first network NI to a second network N2 can also be connected to the switching systems ZU, Z 12 of the highest hierarchical level. This device IGE is assigned a circuit arrangement CIGE , which in turn is assigned to a control unit CIGE CPU. The control unit is assigned a control program designed in such a way that it is triggered by a message IT2, which denotes the availability of a subscriber at a subscriber station T22 in the second network N2, at which the message IT2 is entered, and which includes the subscriber's individual call number in the first network NI, an address information identifying the connection location of the subscriber station T22 in the second network NI is generated and is entered in a memory SIGE assigned to the circuit arrangement CIGE.

FIG. 2 illustrates the structure of the first network NI and the structure of the memories assigned to the switching systems. Here means

Tln - subscriber connections T l, ... AC - address capacity

LTGA - Line Trunk Group Address (512)

LT ^ - Line Terminator Address (128) b - Bit (o - n)

SML J - 130-Servιce Module (participant localization) LR - Lokalιsιerungs- / Hιnweιsregιster

In FIG. 2, the so-called information registers LR-OVSt (S 1 in FIG. 1), LR-KVSt (S31 in FIG. 1), LR-HVSt (S21 in FIG. 1) and LR-ZVSt for the top hierarchical level are shown for each network hierarchy level of the network.

As shown for the LR-OVSt memory, 9 bits (bo-b8) and a maximum of 128 line connections LT 7 bits (b9-b 15) are provided for addressing a maximum of 512 line connection groups LTG. That is, at In this way, up to approx. 65000 (= 5 12 x 128) subscriber stations (T l, ...) (households / office units) can be fully connected to a local or end switching system OVSt (e.g. E l).

As shown for the LR-KVSt memory, 8 bits (bO - b7) are provided for the addressing of a maximum of 255 local or end switching systems OVSt. When a KVSt switching system (eg Z31) is fully expanded, up to 255 (= 2 ^8-1 ) switching systems OVSt can be connected in this way.

As shown for the LR-HVSt memory, 4 bits (bO - b3) are provided for addressing a maximum of 15 node switching systems KVSt. When a HVSt switching system (eg Z21) is fully expanded, up to 15 (= 2 ⁴ - l) KVSt switching systems can be connected in this way.

As shown for the LR-ZVSt memory, 5 bits (b3 - b7) are provided for the addressing of a maximum of 31 main switching centers HVSt and 3 bits (bO - b2) are provided for the addressing of up to 7 foreign ZVSt. When a switching system ZVSt (ZU) is fully expanded, up to 15 (= 24-1) main switching systems HVSt and 7 third-party central switching systems ZVSt (= 2 ³ - 1) can be connected in this way.

In Figure 2, central service modules SML 1, SML2 are also shown, which are connected to all switching systems ZU, ZI 2 of the top hierarchical level.

The structure of the memories S 1 (= LR-OVSt), S31 (= LR-KVSt), S21 (= LR-HVSt) can also be seen in FIG. 3:

A line as shown is provided in each register or memory of each switching center or switching system of the network for each subscriber present in a specific area. For example, in the memory LR-ZVSt for the case that the B-subscriber n (line n) z. B. can be reached with the number 241367xxxx via the HVSt 14 (= "000-1 1 10"), the bit pattern "001 1" is entered in the LR-HVSt memory, if this participant can be reached via KVSt 3. The bit pattern "OOOOllll" is entered in the associated memory LR-KVSt when this subscriber can be reached via the switching system OVSt 15. Assuming that the B subscriber (B, T6) can be reached via the port (connection line) p2047, the bit pattern is entered in the associated LR-OVSt "000001 1 1 1 1 1 1 1 1 1 1".

In the bottom line y of the memory shown in FIG. 3, it is stated that in the event of a "zero entry" in the information registers, the connection of a calling A subscriber from the OVSt in the network hierarchy via the OVSt5, KVSt7, HVSÜ2 up to the hierarchically highest switching center ZVSt 7. From there, the connection is switched through to the ZVSt2 in accordance with the entered bit pattern "010" and from there descending to the HVSt 14. The connection from the HVSt is set up as described above.

In the example selected, it is assumed that an A subscriber who is connected to OVSt 5 (bottom line, column 4) dials the personal number PR of a B subscriber (241367xxxx) who is connected to another KVSt area 7 ( lower row, column 3), the HVSt area 12 (lower row, column 2), ZVSt area 7 (lower row, column 1), ZVSt area 2, HVSt area 14, KVSt area 3 and OVSt area 15 can currently be reached. In the OVSt 5, in the KVSt 7 and in the HVSt 12, to which the A-subscriber is connected, zero entries are entered for the B-subscriber, whereby according to the invention the connection from the A-subscriber via the arrows in FIG. 3 drawn path to the ZVSt 7 is switched. From there, as already described, the connection is established via ZVSt 2, HVSt 14, KVSt 3 and OVSt 15.

In the memories S 1, S21, S3 1, information about the connection position of only the subscribers that can currently be reached in the relevant power supply unit is to be stored (message IT1). As already described and as shown schematically in FIG. 1, the circuit arrangement C1, C3I and C21 according to the invention each has a control unit C1 CPU, C31 CPU and C21 CPU.

A control program is assigned to the control unit C1 CPU, which is configured as follows: Triggered by a message IT 1, which denotes the accessibility of a subscriber at a subscriber station (eg Tl), at which the message IT1 is entered, which a is associated with any subscriber of the network, address information designating the connection location of the subscriber station T1 is generated and entered in a line of the associated memory S 1 assigned to this subscriber.

In a network with at least one further hierarchy level, the generation of information IE 1, which designates the switching system E 1 assigned to the subscriber station T l of the lower hierarchy level, and the entry of this information IE 1 in a line of the memory assigned to this subscriber S31 of the associated switching system Z3 1 of the further hierarchical level (here: second hierarchical level from below). This process will be explained later with reference to FIGS. 4 and 5.

The invention also relates to a circuit arrangement SML 1, SML2, which is arranged centrally in the network and is connected to all switching systems ZU, Z12 of the top hierarchical level of the network. This circuit arrangement has a controller SMLl CPU, which is assigned a control program designed in such a way that, triggered by a message IT1, which denotes the accessibility of a subscriber at a subscriber station Tl, at which the message IT1 is entered, the authorization of the reporting subscriber is checked for using this subscriber line T l. If the result of this check is positive, the circuit arrangement SML1 orders the circuit arrangement C1 in the switching system E1. generate an address information characterizing the connection location of this subscriber station T l and into a line of the associated memory S l assigned to this subscriber to be entered. In a network with at least one further hierarchy level, the generation of information IE 1, which designates the switching system E l of the lower hierarchy level, and the entry of this information IE 1 in a line of the memory S3 I of the associated switching system Z31 associated with this subscriber further hierarchical level and all subsequent causes.

The circuit arrangements C 1, C31, C21; SML 1, SML2 can be formed by an external computer, which can be connected to the respective switching system, preferably a personal computer

FIGS. 4 and 5 illustrate embodiments of the circuitry technical or functional structure of the circuit arrangement according to the invention. This structure is described below.

As shown in Figure 4, there is the circuit arrangement C 1 according to the invention, which can be formed by a computer externally connected to a switching system, e.g. from at least one signaling interface module INI, INI '. Signaling information is exchanged between the computer and the switching system via this signaling interface module INI. A memory S 1 (FIG. 1) is assigned to the computer. In the exemplary embodiment shown, the computer has a first memory area AWL, a second memory area LR, a third memory area CLR / LST and a fourth memory area (working memory) AS

First information can be stored in the first memory area AWL, which indicates the current presence of participants. Second information can be stored in the second memory area LR, which designates the connection position of the subscriber station T1 at which a predeterminable subscriber can currently be reached. Third information can be stored in the third memory area CLR / LST, which designate the transferable parameters of predeterminable subscribers. These parameters include e.g. B. authorization information, interface condition, equipment (fax, telephone) and the like FIG. 4 also shows that the circuit arrangement C 1 has a control unit C 1 CPU, to which a call number register RR 1 RRn is assigned in the exemplary embodiment shown, in which call numbers dialed by a calling subscriber can be stored.

In addition to the call number registers RR 1 ... RRn, an attendance list marker ALM, a decoder DC and marker information register MR 1 MRn are shown in the memory CPU.

The control program of the control unit C1 CPU is in particular also designed in such a way that triggered by a message (IT 1, IE 1), the first and second information stored in the first and second memory areas STL, LR are updated. New address information is thus entered into the memory S 1 and old address information is deleted.

The control unit (central processing unit CPU) consists of one or more microprocessor chips, depending on the extent of the dynamic load and the memory requirement. Hard disks HD, HD 'serve as back-up storage for all programs and storage areas for the phases "Start up" and "Reload" in the event of a system failure. In addition, other back-up storage mechanisms can also be provided.

To ensure the highest possible availability, all facilities are provided in duplicate (C l CPU, C l CPU '; S l, S l'). In normal operation, the facilities work in load sharing mode, i.e. each CPU (C l CPU, C l CPU ') processes approx. 50% of the call requests.

The interface circuits INI can advantageously be connected to the extensions or switching systems as standard modules via 64 kb / s digital signal lines and with standard CCS7 signaling protocols. Their number is selected according to the total traffic in the main traffic hour. The number of subscribers / personal call numbers which are to be managed in the circuit arrangements or route / subscriber search module (C1, C3 1, C2 1) according to the invention depends in particular on the size of the effective range. In an area like the Federal Republic of Germany z. For example, approximately 100 million phone numbers are required to meet the needs of subscribers and the function and service connections.

In systems with the circuit arrangement according to the invention, the personal call number has neither a reference to the connection location (to the normally usual location (apartment / office)) nor a reference to the current location of a subscriber, so that the routes / routes used in the prior art Subscriber search methods in the system with the circuit arrangement according to the invention are not used.

After the address (connection location) is no longer part of the dialed number, the address via the destination and the connection line is stored in the route system - which can be changed by the subscriber. In the circuit arrangement according to the invention, as shown in FIGS. 4 and 5, this takes place in a first and second memory area, i.e. a so-called presence bit guide STL and in so-called information fields LR.

In a telecommunications network with e.g. 100 million phone numbers, each phone number is represented by 1 bit in the first memory area (presence bit bar STL, Fig. 4 and 5), i.e. the storage requirement is 12.5 Mbytes. The second memory area (information field LR) has a different length in the different network levels (FIGS. 1 and 2). This results from a possibly different number of road branches and z. B. the maximum subscriber / connecting line capacity of the subscriber access switching centers OVSt.

In the selected example (see Figure 5), the field length (LR - ZVSt) in the ZVSt level is 1 byte, with 3 bits to identify the neighboring ZVSt and 5 bits are provided for marking up to 31 branches to main switching centers (HVSt).

The field length (LR-HVSt / KVSt) in the HVST / KVST level is z. B. 4 bits (nibbles) if 15 branches to node exchanges (KVSt) or local exchanges (OVSt) are sufficient for identification.

The field length (LR-OVSt) in the OVSt level is longer since each individual subscriber who can currently be reached by means of his personal number can be addressed. With a field length of 16 bits (2 bytes), this is up to approx. 65,000 participants per OVSt.

The route / subscriber search essentially consists of two routines. In a first routine, the bit assigned to this number in the first memory area AWL is read on the basis of the number stored in the number register RR 1 ... RRn and dialed by the calling (A) subscriber.

If there is a "zero entry", the marking register MR1 MRn causes the connection to the next higher network level to be switched through immediately by forwarding a number for the corresponding line bundle to the telecommunications system.

With a 1 entry in the corresponding bit of the first memory area (presence bit bar) STL i.e. the called (B-) subscriber is currently in the catchment area of the extension or switching center is in a second routine using the number stored in the number registers RR1 RRn by means of a decoder DC

(FIG. 5), marks the information field (second memory area) LR assigned to this (B) subscriber and the marking information stored there is read into the working memory AS (FIG. 4).

This marking information is converted into a number that the switching center normally selects for the connection line or a line used, converted and sent to a marking register MR l .... Passed to MRn. From there, this marking information is transferred to the extension or switching center via the signaling interface module INI for connecting the connection.

Setting up / deleting the presence entries for a subscriber / personal number in the circuit arrangement according to the invention takes place as (still) described.

With the circuit arrangement CIGE according to the invention, global reachability of the subscribers who are in the range of action of foreign (“second”) networks N2 (FIG. 1) is achieved. As already described, the circuit arrangement CIGE has, for example, a device IGE (International Gateway Exchange) is assigned to a control unit CIGE CPU, to which is assigned a control program designed in such a way that it is triggered by a message IT2 (FIG. 1) indicating the availability of a subscriber at a subscriber station (T22) in the second network N2, at which the message IT2 is entered, and which comprises the subscriber's individual telephone number in the first network NI, an address information characterizing the connection location of this subscriber station T22 is generated and entered in a memory SIGE.

The length of the information field in the SIGE memory has a length of w 6 bytes, so that up to 12-digit international numbers can be stored. In addition, it can be provided that the maximum number of subscribers who simultaneously use global call forwarding via the CIGE circuit arrangement is limited to, for example, 10% in order to keep the storage space requirement for the extended information fields within limits. In this example it is assumed that no more than 10% of the participants in second networks use this feature at the same time. However, the invention is not restricted to this. With 100 million subscribers with the same number of subscriber numbers (PR), a storage capacity of 100 x 10 *> x 0, 1 x 6 bytes = 60 Mbytes is provided. In order to be independent of the respective dialing and numbering method of the foreign (“second”) network N2, the “lock on” and subscriber search method in the second network N2 can be configured differently than in the national (“first”) network NI his. This is illustrated by the following example:

With "lock on" the participant from the T22 participant abroad chooses from the hotel, the holiday apartment or his domicile e.g. in Spain:

07 49 013X IGE = International Exchange access code

CC = Country Code IGE CC SI SI = Service Indicator for lock on

By dialing the above number at the subscriber station T22, the subscriber gains access to the route / subscriber search module CIGE of the IPI facility in his home country (Federal Republic of Germany with Country Code 49) and this module switches the second (foreign) network N2 on a transparent mode to become independent of country-specific restrictions.

In the next step, the subscriber selects the so-called "calling line identity" (CLI) from the connection (T22) of the second network N2 that in the selected example

34 66470351

CC CLI = extension number abroad

I = country code exists. In contrast to a national "lock on", in the route / subscriber search module of the international exchange, the entire call number, consisting of 2-3 digits for the international code (in the SIGE memory) CC) and can consist of a maximum of 9-10 digits of the subscriber line number (CLI).

Next, the subscriber from the external connection T22 (in the second network N2) gives his own personal number PR from the first network NI, for example 89573214 and, if applicable, his PIN code. The latter is used for the authorization check and thus the activation of his information field with the complete foreign connection number.

The deletion of his previous connection position on the ("first") network NI takes place from the international network level via the central switching office level (ZVSt) down to his access switching office (OVSt). According to this procedure you can find everywhere in the first network under his number zero. Entries in the route / subscriber search modules Cl, C31, C21 (Figure 1).

From this point onwards, for this subscriber, which is entered in the SIGE memory, any telecommunications connection, regardless of its origin, will end up at the ZVSt level in the international exchange (IGE), which in turn is based on the number stored in the information field and this number assigned country ID and call number of the foreign network can establish the connection.

It is also possible that a subscriber can also switch an office telephone number and the number of a fax machine to a second network (eg at the holiday location) in addition to his private telephone number. With that the The advantage achieved is that the subscriber can also be reached multiple times during his presence in the area of action of the second network.

A fee-based recording of charge data does not result in any disadvantages for a calling subscriber with regard to higher call charges. In this case, it is up to the called subscriber whether and for how long he should e.g. In the normal case, a conversation conducted at the local tariff suddenly leads to international charges that will or will not be borne by you at your expense. For this, e.g. introduce a waiting period in which he can make this decision.

Telecommunications connections are made in the networks N I, N2, which are shown in Figures 1 and 2 and 3, as follows.

The programmable telecommunications switching systems E l, ...; Z31, Z21, ZU is assigned a control program designed in such a way that, within the framework of establishing a connection from a first subscriber station (A, T1) to a second subscriber station (B, T6), starting from that of the first subscriber station (A, T l) assigned switching system (E l) the assigned memory (S l) of this switching system is checked for the presence of information about the connection location of the second subscriber station (B, T6). If the result of this check is positive, the connection to the second subscriber station (B, T6) is established in accordance with the content of the memory (S 1). If the result of this check is negative (zero entry), the connection to the switching system (Z31) of the next higher hierarchical level is made. The assigned memory (S31) is checked in this switching system (Z31) for the presence of information about the connection location of the second subscriber station (B, T6). With a positive result of checking the connection is to a ge in the memory (S31) marked ^Λ mediation system (ET) performed. If the result of this check is negative, the connection to the switching system (Z21) of the next higher hierarchical level is made. In this way, the connection to the second subscriber station (B, T6) via a number of switching systems (E1, Z31, Z21, ZU, Z23, E4) and hierarchical levels increases up to the hierarchical level or to that of an international gateway Exchange device IGE associated circuit arrangement CIGE (Figure 3), in which a first entry about the connection location of the second subscriber station (B, T6) is found. According to this entry, the connection continues to descend from hierarchy level to hierarchical level up to the switching system (E4) of the lowest hierarchical level to which the second subscriber station (B, T6) in the "first" or in the "second" network (FIG. 1) is actually connected at the moment

The invention also relates to a method in which the subscriber parts T1,... Can be connected via subscriber connection lines or via radio connections to the respectively associated switching system (eg E l) of the lowest hierarchical level. In addition, in each hierarchy level, instead of switching centers of the own network, access to switching centers of other networks, preferably of mobile radio networks, can be created, so that one and the same personal number (PR) can be used across all networks for the subscriber.

The method according to the invention can also be used in public or private networks and in similar systems and private branch exchanges.

In order to make the advantages of localized network access as simple and attractive as possible for the subscribers to operate in a telecommunication dialing network of the type described, the circuitry design of the terminal devices (subscriber stations) on any connection line (subscriber line) of the network NI shown in FIG. 6 can be used , N2 generate or delete the presence entry (IT1, IT2) by means of a chip card SIM (Subscriber Identity Module).

As already mentioned, the physical connection lines are no longer numbered in the telecommunications dialing network according to the invention, but each registered subscriber receives his own personal number (PR), which, for. B is entered on a chip card (SIM). Due to this fact, several, in principle any number, can now be connected to one connecting line Participants can be reached (e.g. a household with 4 people and occasionally several visitors).

By means of the chip card, a subscriber can inform the network of his or her current presence at any location. This is done, for example, by means of the configuration of the terminal devices shown in FIG. 6

The keypad 1 of the subscriber terminal (telephone), as shown in Figure 6, has in addition to the ten number keys (1 -0) six special keys (2-7), of which two (3 and 4) z. B. for internal device special functions such as a redial for the last connection attempt are provided. In contrast, the keys 2, 5, 6 and 7 according to the invention are connected with ISDN terminal devices and with analog connections with multi-frequency code selection (MFC selection) with character combinations which enable the subscriber access switching center (OVSt) to switch between several function entries to distinguish If a subscriber presses the key 2 (lock-on), he can thus set up his new connection position by generating the message (IT1) on the network and at the same time delete the previous connection position message and if necessary confirm button 2.

In addition to other subscriber-specific data, the personal number (PR) is stored on the chip card. When the lock on key 2 is actuated, the personal number (PR) is transmitted to the exchange (OVSt) and offered there to the number decoder (FIG. 5) for evaluation.

The party 5 provided in FIG. 6 is used by a guest subscriber on a third-party connection to call up his subscriber data, which are important for charging, in the case of incoming connections and from the CLR / LST before establishing a connection to transfer into the call data block. This also happens by means of his personal rut number PR, which is stored on his chip card and from which Call number decoder is evaluated so that its input is marked in the CLR / LST. The method described allows the subscribers to set up connections from any access point in the telecommunications network and still ensure the assignment of the call charges to their own charge account, by means of a corresponding entry in the call data block of the exchange.

The subscriber access switching center OVSt is able to evaluate the different combinations of characters and consequently, upon receipt of the lock-on signal 2, initiates the described processes for setting up / deleting the presence entries when a subscriber changes location, upon receipt of the call signal 5 the processes described for fee data assignment and upon receipt of the dialing start signal 7 the provision of a memory for the dialing information.

The described methods and circuit arrangements can also be integrated in a switching computer of the switching center with an appropriately designed system program.

Claims

? 2Patent claims

1 circuit arrangement for a telecommunication switching system, in particular a telephone switching system, in a one- or multi-level network (NI) consisting of first switching systems (E 1, ...) of a first, lower hierarchical level, and optionally at least second switching systems (Z31,.) Of a second, higher hierarchical level, whereby subscriber stations (T1, ...) can be connected to the first switching systems via subscriber lines, the switching systems (Z31, ...) of a higher hierarchical level each having at least two in a multi-level network Switching systems (E l, E l ') connected to the hierarchy level below

a memory (S 1, ..; S31, .. S21,..) is assigned to each switching system of the network, in which information about the subscribers of the network that can be reached can be stored,

- wherein the circuit arrangement (C l,) is assigned to one of the first switching systems (E l,..),

- The circuit arrangement having a control unit (C l CPU), to which a control program designed in such a way is assigned that triggered by a message (IT 1), which denotes the accessibility of a subscriber at a subscriber station (Tl) at which the message (IT1) is entered, which is an arbitrary subscriber station (Tl) in the network, generates address information identifying the connection location of this subscriber station (Tl) and is entered in a line of the associated memory (S l) assigned to this subscriber and that in a Network with at least one further hierarchy mare, the generation of information (IE 1), which designates the switching system (E l) of the lower hierarchy mare, and the entry of this information (IE1) in a line of the memory assigned to this subscriber (S31) the associated switching system (Z31) of the further hierarchical level is initiated, the circuit arrangement being formed by a computer which can be connected externally to a first switching system, characterized in that

that the computer can be connected to the switching system via at least one signaling interface module (INI), via which signaling interface module (INI) signaling information is exchanged with the switching system,

- That the computer is assigned the memory (S 1), which has a first storage area (STL), in which first information can be stored, which designates the accessibility of subscribers at the subscriber location (T 1), and which has a second storage area (LR), in which second information can be stored that designates the connection location of the subscriber station (T 1) at which the subscribers can be reached.

2. Circuit arrangement according to claim 1, characterized in that the memory (S l) has a third memory area (CLR / LST), in which third information can be stored, which designate switching parameters of predeterminable participants.

3. Circuit arrangement according to one of the preceding claims, da¬ characterized in that the control unit (C l CPU) of the circuit arrangement (C l) is assigned at least one call number register (RR1 RRn) in which dialed numbers dialed by a calling subscriber are searchable.

4. Circuit arrangement according to one of the preceding claims, characterized in that the control program is configured in such a way that triggered by a message (IT1, IE 1), the first ones stored in the first and second memory areas (STL, LR) and second information is updated.

5. Circuit arrangement according to one of the preceding claims, characterized in that these on switching systems (Z31 ...; Z21 ...) can be connected, which are arranged above the lowest hierarchical level.

6. Circuit arrangement (SMLl, SML2) according to the preamble of claim 1, characterized in that the circuit arrangement (SML l, SML2) arranged centrally in the network (NI) and with all switching systems (ZU, Z12) of the top hierarchical level of the network connected is,

- That the circuit arrangement has a control unit (SMLl CPU), which is assigned a control program designed in this way, - that, triggered by a message (IT 1), which indicates the accessibility of a subscriber at a subscriber station (Tl) at which the Message (IT 1) is entered, the authorization of the reporting subscriber to use this subscriber line (Tl) is checked and if the result of this check is positive, the circuit arrangement (SML 1) orders a circuit arrangement (C 1) in the switching system (El), generate an address information identifying the connection location of this subscriber station (Tl) and enter it in a line of the associated memory (S 1) assigned to this subscriber, and that in a network with at least one further hierarchy level the generation of information (IE 1), which denotes the switching system (El) of the lower hierarchical level, and the entry of this info rmation (IE 1) in a row assigned to this subscriber in the memory (S31) of the associated switching system (Z31) - the further hierarchical level is initiated.

7. Programmable telecommunication switching system with a circuit arrangement according to one of the preceding claims, characterized gekennzeich¬ net.

- that a control program assigned to the telecommunication switching system is designed in such a way that - within the framework of establishing a connection from a first subscriber station (A, T1) to a second subscriber station (B, T6), starting from that of the first subscriber station ( A, T l) assigned switching system (E l) the assigned memory (S l) of this switching system to the The presence of information about the connection location of the second subscriber station (B, T6) is checked, and

- That if the result of this check is positive, the connection to the second subscriber station (B, T6) is established in accordance with the content of the memory (S 1), and - that if the result of this check is negative, the connection to the switching system (Z31) The next higher hierarchical level is carried out, in which switching system (Z31) the allocated memory (S3 1) is checked for the presence of information on the connection position of the second subscriber station (B, T6), and that if the result of the check is positive, the connection to a switching system (ET) identified in this memory (S31), and - that if the result of this check is negative, the connection to the switching system (Z2 1) of the next higher hierarchical level is made,

- That aut the connection to the second subscriber station (B, T6) via several switching systems (E l, Z31, Z21, ZU, Z23, E4) and

Hierarchy levels in ascending order up to the hierarchy level in which a first reference entry about the connection location of the second subscriber station (B, T6) is found, and that according to this entry the connection from hierarchy level to hierarchy level descending to the switching system ( E4) of the lowest hierarchical level to which the second subscriber station (B, T6) is actually currently connected

8. System with a circuit arrangement according to one of claims 1 to 4, characterized in that the subscriber stations (Tl, ..) via subscriber lines or via radio connections with the respectively associated switching system (E l) of the lowest hierarchical level are connectable.

9. System with a circuit arrangement according to one of claims 1 to 4, characterized in that to the switching systems (E l, Z31, ..; Z21, ...) telecommunication private branch exchanges (NST 1, NST2) are attachable, and that the extension subscribers (NT 1 1, .., NT2 1,.) these systems (NSTI, NST2) are managed like the other subscriber stations (Tl, ...).

10. subscriber station for connection to a programmable telecommunication switching system according to claim 7, characterized in that the subscriber station (Tl, ...) has a device for generating a message (IT1), which denotes the accessibility of a subscriber at this subscriber station .

11. Subscriber station according to claim 10, characterized in that the device comprises a chip card reader (8) and optionally an operating element

(2) has that the chip card reader (8) is designed in such a way that subscriber identification data and possibly additional data are read from a chip card (9) which participates individually and is used to form the message (IT1) which indicate the accessibility of the subscriber and that data read by the chip card reader and / or further additional data can be transmitted to one of the first switching systems (E1, ...) by actuating the control element (2).

12. Circuit arrangement for a telecommunication switching system, in particular a telephone switching system, in a multi-stage first network (NI) consisting of first switching systems (E1, ...) of a first, lower hierarchical level, from optionally at least second switching systems (Z31,. ..) a second, higher hierarchical level, - subscriber lines (Tl, ...) can be connected to the first switching systems,

- The switching systems (Z31, ...) of a higher hierarchy level are each connected to at least two switching systems (El, El ') of the hierarchy level arranged below, - each switching system of the network has a memory (S1, ...; S31 , ...; S21. ...) is assigned, in which information about the connection location of all subscribers of the first network can be stored, characterized in that the circuit arrangement (CIGE) is assigned to an International Gateway Exchange device (IGE) which connects the first network (NI) to a second network (N2),

- That the circuit arrangement has a control unit (CIGE CPU), which is assigned a control program designed in such a way that it is triggered by a message (IT2) that the accessibility of a subscriber at a subscriber station (T22) in the second network ( N2), on which the message (IT2) is entered, and which comprises the subscriber's individual rut number in the first network, generates an address information identifying the connection location of the subscriber station (T22) in the second network (N2) and into one the memory (SIGE) assigned to the circuit arrangement (CIGE) is entered.

13 Method for establishing telecommunications connections in a one- or multi-level network (NI) consisting of first switching systems (E l,. ..) of a first, lower hierarchical level, and possibly at least second switching systems (Z31, ..) of a second, higher hierarchical level ,

- where subscriber stations (Tl,..) can be connected to the first switching systems via subscriber lines, - wherein in a multi-level network the switching systems (Z31, ..) of a higher hierarchy level each have at least two switching systems (E 1, E 1 ') the hierarchy mare arranged below are connected,

a memory (S 1, ...; S31,...; S21,...) is assigned to each switching system in the network, in which information about the connection location of reachable subscribers of the network can be stored,

- wherein the circuit arrangement (C l, ...) is assigned to one of the first switching systems (E l, ...) and is formed by a computer that can be connected externally to a first switching system, - being triggered by a message (IT1 ), which indicates the accessibility of a subscriber at a subscriber station (Tl), at which the message (IT 1) is entered, which is any subscriber station (T l) in the network, generates an address information characterizing the connection location of these subscriber parts (T l) and into one assigned to this participant Line of the associated memory (S l) is entered and that in a network with at least one further hierarchy level the generation of an information (IE 1), which designates the switching system (E l) of the lower hierarchy level, and the entry of this information (IE1) in a row of the memory (S31) of the associated switching system (Z3 1) assigned to this subscriber of the further hierarchical level, characterized in that

signaling information is exchanged between the computer and the switching system via a signaling interface module (INI) via which the computer is connected to the switching system,

- That in a first memory area (STL) of the memory (S l), which is assigned to the computer, first information is stored, which designate the current presence of participants, and

- That in a second memory area (LR) of the memory (S), which is assigned to the computer, second information is stored, which

Designate the connection location of the subscriber station (Tl) at which a predefinable subscriber can currently be reached.

14 A process for the production of telecommunications connections according to claim 13, characterized in that

- That in the course of establishing a connection from a first subscriber station (A, T l) to a second subscriber station (B, T6), starting from the switching system (E l) assigned to the first subscriber station (A, T l) assigned memory (S 1) of this switching system is checked for the presence of information about the connection of the second subscriber station (B, T6), and

- That if the result of this check is positive, the connection to the second subscriber station (B, T6) is established in accordance with the content of the memory (S 1), and - that if the result of this check is negative, the connection to the switching system (Z31) the next higher hierarchical level, in which switching system (Z31) the assigned memory (S31) is checked for the presence of information about the connection position of the second subscriber station (B, T6), and that if there is a positive The result of the check is the connection to a switching system (ET) identified in this memory (S31), and - If the result of this check is negative, the link to the switching system (Z21) of the next higher hierarchical level is made.

- That in this way the connection to the second subscriber station (B, T6) via several switching systems (El, Z31, Z21, ZU, Z23, E4) and

Hierarchy levels in ascending order up to the hierarchy level in which a first reference entry about the connection location of the second subscriber station (B, T6) is found, and that according to this entry the connection from hierarchy level to hierarchy level descending to the switching system ( E4) of the lowest hierarchical level to which the second subscriber parts (B, T6) are actually currently connected.

15. Method for establishing telecommunication connections in a first single or multi-level network (NI) consisting of first switching systems (El. ...) of a first, lower hierarchical level, and possibly at least second switching systems (Z31, ..) of a second , higher hierarchical level,

- Subscriber stations (Tl, ...) can be connected to the first switching systems via subscriber lines,

the switching systems (Z31, ...) of a higher hierarchy level are each connected to at least two switching systems (El, El ') of the hierarchy level arranged below,

- With each switching system of the network, a memory (S1, ...; S31, ...; S21, ...) is assigned, in which information about the connection location of reachable subscribers of the first network can be stored, so that I don't know,

that the telecommunication connection to be established is routed via a circuit arrangement (CIGE) which is assigned to an International Gateway Exchange device (IGE) which connects the first network (NI) to a second network (N2),

- Drawn by a message (IT2), which denotes the accessibility of a subscriber at a subscriber station (T22) in the second network, at which the message (IT2) is entered, and which the subscriber individual subscriber number of the subscriber in the first network, an address information identifying the connection location of the subscriber station (T22) in the second network is generated and entered into a memory (SIGE) assigned to the circuit arrangement (CIGE).