JPS5858872B2 - Concentration stage control method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a concentrator stage control method in a distributed control switching system.

Concentration stage control in a distributed control switching system that has a conventional concentration stage device for concentrating subscriber lines and a distribution stage device that has a control system for switching functions, and has a control configuration of a concentration control processor, trunk control processor, and central control processor. In the previous system, a logical control unit in a trunk control processor located in the middle performed logical judgment control regarding the concentrator stage device.

To be more specific, various control information for controlling subscribers etc. is sent from the central control processor, which controls the logical control of the entire switching system, to the concentrator LC, and is first subjected to logical judgment control by the trunk control processor. .

Next, concentrating stage control information is separately created in the trunk control processor according to the result of the judgment control, and is sent to the concentrating control processor.

Conversely, control information from the concentrator control processor is logically determined by the trunk control processor, and control information created according to the result is sent to the central control processor.

That is, concentrator control in the distributed control type exchange system having the above-mentioned configuration is carried out by controlling three logical layers: a central control processor, a trunk control processor, and a concentrator control processor.

On the other hand, control of various trunks has been performed using a logical two-layer structure of a central control processor and a trunk control processor.

Therefore, in the conventional system, problems such as complexity of control, particularly complexity of processing of the trunk control processor, poor separation of functions between processors, and deterioration of independence have occurred.

The present invention has been made to eliminate these drawbacks, and is characterized by performing logical two-layer control regarding concentrator stage control, and its purpose is to simplify control and separate functions between processors. In addition to measuring gender, we also measured independence.

This will be explained below using figures.

FIG. 1 is a block diagram of a distributed control switching system in which processors each having the function of performing various types of control are directly connected by control information lines, and a concentrator LC that performs subscriber line concentration is shown in FIG. , a line concentrator processor LC-LNP that controls the inside of the device, and a line concentrator LC-8P that accommodates a plurality of subscribers SUB.

The distribution stage device DNS-8W is a device that accommodates a plurality of the above-mentioned line concentrator devices LC and performs exchange processing between concentrated subscribers of its own station and between subscribers of its own station and subscribers of other stations (not shown). A distribution stage switch TSM, a trunk device group TRK for accommodating various trunks such as a transmission register trunk used for sending and receiving various information necessary for exchange control, a logic control section, a communication control section, etc. Equipment group TRK
a trunk control processor TKP that controls the system, and a central control processor C that performs logical control of the entire switching system.
It is composed of P.

Further, the line concentration control processor LC-LNP and the trunk control processor TKP of the same device are directly connected by a control information line LINE, and the trunk control processor TKP and the central control processor C1 are connected by a control information bus BUS.

In the above configuration, when a subscriber S[JB accommodated in the concentrator LC makes a call, the concentrator LC-L
The NP sends the call detection information to the trunk control processor T in the distribution stage device DIS-8W via the control information line LINE.
Send to KP.

Upon receiving this, the trunk control processor TKP identifies that the call detection information is not addressed to its own device but is addressed to another device, that is, the central control processor CP. The information is transferred to the central control processor CP via the control information bus BUS under the transfer control of the communication control unit without any additional judgment.

When the central control processor CP receives this call detection information, it performs logical judgment control and then switches the distribution stage switch TSM.
In order to receive dialed digits from subscriber S[JB, the communication line SP between the transmission register trunk (not shown) in the trunk device group TPK and the concentrator channel device LC8P is connected.

Thereafter, the central control processor CP sends digit reception request information for dialing digit reception to the trunk control processor TKP.

The trunk control processor TKP receives the above information,
When it is determined that the message is addressed to the device itself, a built-in logic control section makes a logical judgment and sets the corresponding transmission register trunk to a state in which it can receive dialed digits.

Thereafter, the calling subscriber SU who has been on standby during this time
When B dials the called subscriber number, it is sent to the originating register trunk and the dialed digits are received.

When the reception of the subscriber's dialed digits is completed as described above, the trunk control processor TTKP sends digit reception completion information to the central control processor CP.

Then, on receiving this information, the central control processor CP performs an analysis of the dialing digit information received on said trunk and an analytical process regarding the called subscriber, for example in order to call the called subscriber accommodated in the concentrator LC. The incoming call request information is sent to the trunk control processor TKP.

Upon receiving this information, the trunk control processor TKP identifies that the information is not addressed to its own device, similar to the above-mentioned call detection information, performs only transfer control without adding logical judgment, and connects the control information line LINE. The data will be transferred to the line concentration control processor LC-LNP via the LC-LNP.

The line concentration control processor LC-LNP then performs a logical operation on the incoming call request information, adds a logical judgment, and calls the called subscriber.

The line concentration control processor L receives a subsequent response from the called party.
The processors C-LNP, h-rank control processor TKP1, and central control processor CP perform necessary control until the end of the call.

As explained in detail above, the line concentration control processor LC-L
The control information from the NP is sent to the line concentration control processor LC-L.
It is sent to the central control processor CP simply via the trunk control processor TKP located between the NP and the central control processor CP.

Conversely, line concentration control information from the central control processor CP is also sent to the line concentration control processor fLc-LNP simply via the trunk control processor TKP.

In other words, the trunk control processor TKP only controls the transfer of control information between the line concentrator processor LC-LNP and the central control processor CP depending on the destination of the received control information, and does not add logical control regarding information addressed to both processors. .

Therefore, between the concentrator control processor LC-LNP and the central control processor CP, the central control processor CP and the trunk control processor TK in the distribution stage device DIS-8W
Similar to the control between Ps, it can be assumed that logically two-layer control is performed, so that control in the system can be simplified, functions can be separated well, and independence between processors can be achieved.

In the embodiment described above, the line concentration control processor LC-LN
Although the system configuration in which P and the trunk control processor TKP are directly connected by the information control line LINE has been described, the present invention is not limited to this.

For example, as shown in FIG. 2, a concentrator LC and a distribution stage DIS-8W are connected via a digital multiplexing highway HW, and time slots for inter-processor communication control allocated on the multiplexing highway HW are used. The same objectives and effects as the embodiment shown in FIG. 1 can also be achieved in a distributed control switching system in which processors in both devices are connected to each other and control information can be transmitted and received.

That is, the trunk control processor TKP may only control the transfer of control information between the central control processor CP and the line concentration control processor LC-LNP, and may not perform logical control regarding the line concentration control processor LC-LNP.

Note that the system shown in Figure 2 does not require two types of lines, the information control line LINE and the speech line SP, as in the case of Figure 1, and is suitable for a system in which the line concentrator LC is located in a remote location. ing.

As explained in detail above, according to the present invention, the central control processor located between the concentration control processor of the concentration stage device and the central control processor in the distribution stage device that controls the entire system,
The trunk control processor that controls various trunks receives only transfer control without using the logical judgment function, and the control configuration is as if the central control processor and the concentrator control processor were directly connected. Excellent effects such as simplification of the system, separation of functions, and independence between processors can be expected.

[Brief explanation of the drawing]

FIG. 1 shows one embodiment of the present invention, which is a simplified block diagram of a distributed control switching system configuration in which processors are directly connected by control information lines, and FIG. 2 shows another embodiment. , is a simplified block diagram of a distributed control switching system configuration in which processors are partially connected by digital multiplex lines. LC is a line concentrator, LC-8P is a line concentrator, LC
-LNP is a concentration control processor, DIS-8W is a distribution stage device, TSM is a distribution stage switch, TRK is a group of trunk devices, TKP is a trunk control processor, CP is a central control processor, LINE is a control information line, SP is a communication path, B
[JS is the control information bus and HW is the digital multiplex highway.

Claims (1)

[Scope of Claims] 1. A concentrator processor that controls a concentrator communication path device located on the subscriber side and that concentrators the subscriber, a central control processor that controls the entire switching system, and an interface between the two processors. In a distributed control switch, which is equipped with a trunk control processor that controls various trunks during switching operations, the trunk control processor applies logical judgment control to the data sent from the concentrator control processor or the central control processor. A concentrator stage control method that performs only transfer control to a corresponding processor without any interference, and has a logical two-layer control configuration between a central control processor and a concentrator processor in the same way as between a central control processor and a trunk control processor. .