DD204017A1 - CIRCUIT ARRANGEMENT FOR COMMUNICATION PROCESSES IN TELEPHONE DISTRIBUTION SYSTEMS - Google Patents

Abstract

Circuitry for centralized switching, relating to systems for analogue and digital information exchange, consisting of a number of functional blocks, e.g. Processors or hardwired logic structures in a distributed arrangement, characterized in that, for the purpose of exchanging information between the functional blocks of the control system, they are interconnected in both the interconnection and control networks via conduit systems such that the connections are partially variable in time.

Description

-A-

Circuit arrangement for switching processes in telephone exchanges.

Field of application of the invention

The invention relates to a circuit arrangement for carrying out switching processes in control centers for analog and digital information transmission using time-shared connection networks operating according to the switching-through method.

Characteristic of the known technical solutions The patent search resulted in a number of switching systems with controls ¹ with different degree of distribution and principles of information exchange adapted to the degree of distribution *

In switching systems with access systems in distributed structure and processing systems in a concentrated structure (OS 2922490, OS 2326113, OS 2826062, OS 2826063) the information exchange is handled via the variable connection network. "The signaling channel of a PCM line is used for the signaling (OS 2556049) ). A further possibility is the use of the existing interconnection and additional signaling network (OS 2907867). In addition, a control system for digital switching systems is known which provides address coding and decoding between

a bus system in the access system in a distributed arrangement and a bus system in the processing system in a concentrated arrangement used (OS 2848249, OS 2848255, OS 2848293),

Switching systems with combination of access and processing system in distributed arrangements are using A-Precessors for a certain number of leads with realization of incentive search and part of the route search and B-processors for several such groups of leads and the corresponding connection module as part of Connection network with the realization of common functions (establishing, holding and triggering of connections) feasible (OS 2909762). The exchange of information between the processors takes place via the interconnection network. "Furthermore, switching systems with a combination of access and processing system in a distributed arrangement exist which enable cooperation of the control, storage and processing units via a bus system. an additional piping system, use (OS 2747417 ,, WP 137872). As a further possible solution in DDR-WP 225603 a control system with separation of access and processing systems is indicated, which contains a line system for each subsystem, which work together via a system control. As a line system in the access system, the connection network is shared, in the processing system, a bus system is used.

Distributed control concepts are characterized by the assignment of memory, control and processing units to different control levels of a control system. In general, the functions of information acquisition and output are realized in the first control level cooperating with the call processing peripheral and the functions of information processing in the second control level «Availability and flexibility required

the smallest possible tax areas. This situation results in a large number of storage, control and processing units, which depend on the capacity area of the switching system and for which an information exchange is to be organized in the context of the switching process. The piping system required for this and its control becomes, the more complicated, the more storage, control and processing units must work together, so is on the type of Funktionssteüung, i. the number of functional areas, and the extent of load sharing, i. the number of action areas, .dependent. The number of control, storage and processing areas resulting from this division of labor corresponds to the degree of distribution of the control system. The exchange of information between the functional units (FE) of the control levels, which is necessary within the framework of the switching process, can be implemented via one or more line systems. In this case, control concepts by means of line system in the connection network (VN)

- with permanent assignment of decentralized and central FEj

- with temporary assignment of decentralized and central FEs; via line system in the control network (SN)

- with temporary assignment of decentralized and central FE. via a line system for variable assignment in the SN (LS), with permanent assignment of decentralized and zen ~ ^x vsn

trale FE-via a line system: for fixed assignment in the SN (LSp _SK] ) and variable assignment of central FE with each other

via line system in the connection and control network (VN, SM)

- with temporary assignment of decentralized and centralized FEs via variable allocation management system in the VN (LS _WN ) and with temporary assignment of central FEs to one another via a variable assignment bus (BUS) system in the SN (LS ^ _n ,) become ..

-A-

The degree of distribution of the control system is proportional to the complexity of the piping system. With rising. Degree of distribution arise under the condition of an existing line system ever more complicated time problems, To keep the cost of the line system within reasonable limitsj can be adapted to the requirements of availability and flexibility in realization in SN, the degree of distribution only to a certain extent. An optimal degree of distribution in the sense of the requirements of availability and flexibility can be realized if the information exchange serving to carry out the information exchange is also used to control the information exchange, i. is used to implement the mediation process (Fig. 2). The advantage of the optimal degree of distribution is the disadvantage of a multiplicity of connections between the FEs per switching process and the corresponding time expenditure. It is also possible to realize the multiplicity of decentralized FEs with the central FE via the UN and the cooperation between the central FEs to realize a bus system in the SN. The number of decentralized FEs to be assigned to a central FE is limited (about 10), so that a large number of central FEs have to be interconnected via the bus system. This fact has the consequence that, taking into account the demand for interconnection without access conflicts, the capacity range to be realized for exchanges is limited or the cost of the necessary bus system is very large.

Object of the invention

It is the object of the invention to provide an arrangement for exchanging information between the functions of a distributed structure control system, i. in the form of a multi-microprocessor system (MMPS), which reduces the number of necessary connections between the FEs of the control network for a switching process.

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Explanation of the essence of the invention

The invention is based on the object by an appropriate design of the exchange of information between the FE used for the realization of switching processes MMPS economic control systems in terms of flexibility and availability, taking into account a minimum amount of time for the switching process and the substantial avoidance of access conflicts in the cooperation of function blocks create.

According to the present invention, this object is achieved by having peripheral processors (PPr) for information recording and output, arbitration processors (VPr) for information processing, system processors (SPr for scheduling control and control processors (StPr) for controlling cooperation of processors in the control network Each of a group of subscriber and trunk lines has a PPr associated with it, which can be interconnected via the VN and SN by means of temporary connections for the realization of switch processors The number of lines grouped together must be one for reasons of availability and flexibility As small as possible (50 ... 100 TL, 20., 50 VL), a summary of groups of ^ t-IO makes sense. "Oeder of these groups of PPr is assigned a SPr, with the PPr persists over the UN, ie over one Fixed assignment, regardless of the: implementation of switching processes are connected.

These SPr control the mediation processes necessary within such a group, which have to be realized on the basis of connection requests. They collect the information needed for processing from other SPr and the responsible VPr and distribute their result information to them. The connection paths between the SPr and the VPr become

over the UN as needed temporarily, i. with variable allocation, manufactured. To control the communication paths during the switching process and between the VN's accesses, StPrs are required for routing, the number of which depends on the size and number of areas of the VN controlled by them. The StPrs are instructed by the SPr to carry out route searches according to the requirements. This cooperation is realized via a bus system in the SN,

The control system is thus designed such that connection paths between processors, which are often required within the switching process, are realized as permanent connections. The connections between processors, which realize software and / or hardware consuming switching functions and between which a small number of connections with possibly large amount of information is necessary in the context of a switching process, are made as required, ie at times depending on the stage of the switching process. Due to the multitude of existing SPr and VPr , the connection possibilities of the VN are used to avoid access conflicts, which are controlled just as in the establishment of connections between its accesses, ie the TL and VL. For this purpose, parts of the UN, so-called connection modules (VM), StPr are assigned, which realize the route search. The information about the processors and accesses to be connected is provided to the StPr by the SPr. There is a bus system in SN for this.

The number of processors with different functional areas depends on the required capacity range of the switching system. "Depending on the functional area, different types of microprocessors can be used with regard to processing width, addressing range and operating speed

must be compatible. The control concept can be applied to any capacity range. Depending on the functional area, additional circuit measures may be necessary to increase the availability, eg due to redundant modules. PPr are not duplicated. StPr depend on the area affected, d _e h "the size of the controlled switching modules without realizing the duplication with, SPr and Vpr are generally to duplicate. Through this system conception, the existing routing system of the UN is used for the switching process, the number of route searches and thus the time required for a switching process by the mixed use of permanent and temporary connections compared to known system solutions reduced and a minimal effort for the management system in the SN, for the way search is necessary, driven.

embodiment

The invention will be explained in more detail using an exemplary embodiment with the aid of FIGS. 6 and 7. Referring first to Figure 6, Figure 7 will be used to discuss the connection setup. Fig. 6 shows the control system with the piping system. To prepare compounds via a VN, PPr SPr 9.10 _# VPr11, 12, 13 and StPr14 are required. The information recording and output from and to sentence modules (SM), which are each assigned to a certain number of TL and VL, and the associated connection modules (VM) as multilevel coupling arrangements is realized by PPr. »The PPr are for information exchange via permanently switched Connections through the VM

17) with SPr and VPr via a VN with variably switched connections (LS ..18), connected together. These connections are established and dismantled by existing StPr 14 claims. Setting files are sent in reverse order via the SPr 9, 10 to the PPr and from there to the SM and VM, for the establishment and dismantling of

StPr connections require origin and destination information for the corresponding VM and its allocation information; Thus, it is necessary to include state information and to provide setting information, SPr 9, 10, VPr 11, 12, 13 and StPr 14 are interconnected via a LS.

^V SN

The different processor types fulfill the following tasks:

- PPr peripheral processor

- for TL information recording and output, u, U,

preprocessing

- for VL information recording and output

- for character- information acquisition of impulse and hand touch selection of TL and MFC selection of VL

- SPr system (run) control for one

number of PPr with certain functional range SPr for TL

SPr for VL

switching processor

VPr for signaling (pulse and code selection, MFC dialing)

- VPr B assessment of origin and destination

Formation, functions with a large storage capacity and simple realization

- StPr

- StPr VM Realization of the route search in the VM

of the UN on the basis of demands of SPr and VPr

The connection establishment is based on the example of an external connection of Figure I ₁ d., H. from a subscriber A in a first to a subscriber B in a second exchange.

- SPr SM ₇ L - SPr ^SM VL Vpr -VPr Z

2r Γ Γ j "!

Recording the origin information

- Recording the Anreizinf orinat ion (Usprungsinfornriation) of the subscriber A by the associated PPr SM _T) 5 and request the associated SPr Sf-U, 9,

- determining the type of selection information (destination information as a pulse or touch tone) by the SM SPr, 9 and determining a VPr Z-, Ii with access to PPr SM _ _{V r,} 7 S)

Recording the target information

Request and allocation of eiYies StPr 14 by the SPr SM_, and establishment of a connection path between SPr SM_. 9 and

VPr Z _T. ,, 11 and between SPr SM-, 9 and VPr B 13 IW IL

Selection of an S, and transmission of the dialing character to the subscriber A by the PPr SM __,., 7 via the PPr SM-, 5

Z I v'v I L

- Recording the election information (destination information) by the

pp _r CM

TL 5 and transfer to S _z via PPr SM _zy 7

Evaluation of the destination information

- passing on the election information (destination information) to the SPr SM-, 9 and pre-evaluation (type of connection, number of digits necessary for the route search)

Requesting a StPr 14 and establishing a connection between SPr SM ₇ , 9 and VPr B 13 for evaluation

Passing the election information (destination information) to the VPr B for evaluation and transmission along the desired direction,

d. H. Marking a SPr SM, 10 to the SPr SM_. 9

mark

(- Triggering the connection between SPr SM_, 9 and VPr B 13) - Determining the SPr SM, 10 with the desired direction by the SPr SM_, 9

- Requesting and assigning a StPr % A and establishing a connection between the SPr SM 9 and the SPr SM ..

- Request for a free line in the desired direction by the SPr SM-, "

Transmission of the line address and the charging information by the SPr SM _yL 10 to the SPr SM-. _L 9

Passing on the election information

Requesting a StPr 14 and establishing a connection between PPr SM _T , 5 and PPr SM, 6 (origin and destination)

Determination of the type of signaling to VL (MFC) by the SPr SM _VL 10 and identification of a VPr Z 12 with management of MFC transmitter and receiver

Requesting a StPr 14 by the SPr SM 10 and establishing a connection between the SPr SM _TL 9 and a VPr Z 12 ^ MFC ^

Request of an MFC transmitter / receiver by the SPr SM-9

- Transmission of the address of an MFC transmitter / receiver to the SPr SM ... 10 after selecting a S .. _FC and the associated PPr ^SM Z MFC ⁸

- Request a StPr 14 and connect

between the PPr SM _{Z] F} 8 and the PPr SM 6

- Transmission of the destination information from SPr SM_, 9 to VPr Z and forwarding to PPr..Z _MFe ..: _ 12 or to S. _{] FC}

- Transfer of MFC information from S _{M {} - "via the responsible PPr SM _Z , _1FC 8" to PPr SM, 6

- Sending out the digits of the dialing information in the MFC by the PPr SM '6

- Recording of reverse signals by the PPr SM _y . 6 and passing to S _MFC and the SPr Z _MJ _ _C 12 through the PPr SM _{Z Mf} _ 8

End of the information and information transfer

- Marking and transmission of the polling state by SPr SM-j. _L 9 to the PPr SM 5

- Triggering the connection path between PPr .SM _{T |} 5 and PPr

^SM Z TW ⁷

- Recognition and transfer of the free state S -,., By the PPr

i V! /

SM ^ _ / and forwarding to VPr Z_, "11

Z. 1 VV I Vv

* L Γ LC id - ¹ - j '· tC fuJ

- Transmission of the remaining digits of the destination information and Wahiende information to the VPr Z _MFC 12 and the PPr

SM-, ", ._" 8 with the used S, _{1 [r} "Z MFC ι ί γ U

Passing on the remainder of the destination information as MFC to the PPr SM ₁ ,. 6 and send out by S ...

Passing the end-of-voting criterion (after receipt of the last digit) by the PPr SM _MFC 8 to the PPr SM _VL 6 and forwarding to the associated SPr SM ₁ ,. IO

- Triggering the connection between PPr SM _V. , _ 8 and PPr SM on the basis of a command from SPr SM 10

- Notification of the transmission of all digits from SPr SM ... 10 to SPr SM _TI 9, as a prerequisite for switching through the connection path

attitude

- Transmission of the command for switching the connection path between TL and VL from SPr SM-. 9 to the PPr SM_. 5 and passing to the PPr SM-6

- Switching through the connection path

- Notification of execution of the command from the PPr 5, 6 to the VPr 9, 10

Establishment of the connection to the subscriber B in another exchange, this sends ringing tone to the subscriber A and call signs to the subscriber B.

Informationsaust ausch

- Reporting the participant B _? Beginning of the information exchange

- Transmission of the registration indicator to the PPr SM. 6 and continue to SPr SM _yL 10

- Disclosure of this information to the SPr SM-, 9 for fee valuation and registration

- Information exchange

- Acquisition and transfer of the segregation information by the PPr SM ₁ .. 6 and transfer to the SPr SM 9 via the SPr SM 10,

Transfer to the PPr SM _{T [} _ 5 and conversion into counts

- End of the information exchange

release

- Detected by the BBr SM 5 and passed on to the SPr SM _TL 9

- transmission of the trip indicator to the SPr SM.,. 10 and passing to the PPr SM, 6

- Handover of the tripping command SPr 9, 10 to the PPr 5, and triggering the connection path

- Request for a StPr 14 and establishment of a link • between SPr SM ,, 10 and VPr B 13 (determination by the location and assignment of the VL and its PPr 5, 6)

- Notification of the free status of the VL to the VPr B 13 by the

PPr SM ... 6 via SPr SM ₁ VL f VL

Claims (4)

invention claim 1-, circuit arrangement for switching processes in telephone exchanges, consisting of functional blocks in the form of processors and / or logic structures in a distributed arrangement, characterized in that Funktionsblökke the control system interconnected both in the interconnection network (17, 18) and in the control network (16) via line systems are, so that connections are partially independent of time fixed, sometimes time-dependent variable, 2. Circuit arrangement according to item 1, characterized in that the peripheral processors (5, 6) and system processors (9, 10) via the connection network fixed time-independent, system (9, 10) and switching processors (11, 12, 13) over the connection network time-dependent variable and system (9, 10) and control processors (14) are interconnected variable over time via a line system in the control network, 3. Circuit arrangement according to item 1, characterized in that the system (9, 10) and switching processors (11, 12, 13) are variably associated by the control processors (14). - For this 4 pages drawings -. Figs. 6 and 7 show the essence of the invention £ ι L L .. i J _ "· ι 'ί;" ο ύ U