JP2688427B2 - Input / output terminal accommodation control method for time division exchange - Google Patents

Description

The present invention relates to an input / output terminal for a time division exchange, which is suitable for controlling a time division electronic exchange by accommodating a large number of input / output terminal devices. The present invention relates to an accommodation control method.

[Conventional technology]

Generally, a time-division electronic exchange has various input / output terminals such as a CRT display and a typewriter for maintenance / operation or to read information from a database, and an input / output for exchanging information with an auxiliary service processor. Terminal devices, as well as a large number of terminals such as personal computers and multi-functional telephones, such as digital terminals for subscribers with intercommunication function, used in integrated digital networks, have been accommodated and controlled. There is. In the past, in order to control the input / output terminal device, as described in Japanese Patent Laid-Open No. 60-91796, the input / output terminal device has a channel device, an I / O processor, etc. It is controlled by a central controller.

[Problems to be solved by the invention]

However, according to the conventional technique, it is necessary to provide an input / output control device corresponding to the input / output terminal device in the central control device of the exchange, and the number of input / output terminal devices that can be accommodated depends on the processing capacity of the input / output control device. Are restricted. Also, since the central control unit of the exchange must be provided with a terminal interface section, and the mounting constraint condition becomes strict, the number of input / output terminal devices that can be accommodated is also limited by this. Further, the information transfer between the input / output terminal units must be carried out on the processor bus in the central control unit, which greatly affects the throughput on the bus.

As a result, if many I / O terminals are accommodated and it is attempted to control them, the I / O controller must be speeded up. It is disadvantageous.

An object of the present invention is to provide a method for accommodating a large number of input / output terminal devices in a time-division exchange, which can be easily and economically controlled while allowing them to be accommodated in the time-division exchange. .

[Means for solving the problem]

For the above purpose, a large number of various input / output terminal devices are
Downlink PCM highway and monitoring / control signal lines are branched and connected to each other, and an empty channel designation control provided commonly to the above various input / output terminal devices via the upstream / downlink PCM highway and monitoring / control signal lines. Once accommodated in the device, upstream / downstream time division multiplexed PCM highway,
It is accommodated in a central control unit for controlling the switching operation in the time division exchange network via the time division exchange network, and when the operation is monitored and controlled by the central control unit, it is input to the time division exchange. An output terminal accommodating control method, wherein a supervisory signal accompanied by input / output terminal device identification information from each type of input / output terminal device relating to start of use or current use is assigned to a vacant channel designation control device via a monitoring / control signal line. By being set to a predetermined position in the signal channel on the upstream time division multiplexed PCM highway, it is transferred to the central control unit via the time division exchange network and is scanned and monitored, but as a response to the result of scanning and monitoring. The control signal with the corresponding input / output terminal device identification information is transmitted from the central control unit via the time division exchange network to the downlink time division multiplexing PCM While being set to the signal channel on the way, it is extracted by the idle channel designation control device and then transferred to the corresponding input / output terminal device via the monitoring / control signal line, so that This is achieved by controlling the movement.

[Action]

In the idle channel designation control device, the data channel on the PCM highway used by each input / output terminal device is designated each time it is used, based on the signal information from the central control device from the downlink signal channel. It is a thing.

That is, between each input / output terminal device and the exchange, the signal information is inserted / removed (means of setting / extracting) by the idle channel designation control device on the upstream and downstream signal channels as specific time slots on the PCM highway. ), The upstream signal information to the exchange side is constantly scanned and monitored by the call processing operation by the central control unit via the time division network. . When a start request from any of the input / output terminal devices is identified by this scanning and monitoring, the central control unit reports the position information of empty data channels on the PCM highway under its own control. Along with the input / output terminal device identification information, the downlink signal channel is sent to the idle channel designation control device as downlink signal information. The idle channel designation control device extracts the signal information by the downlink signal channel, and after sending the start confirmation signal to the input / output terminal device, the data information from the input / output terminal device is changed by the empty data channel position information. It is to be inserted into the designated empty data channel and transmitted as upstream data information to the exchange side. The central control unit can recognize the data information from the input / output terminal unit by scanning the upstream data channel designated by itself.

If any data information is transmitted to the input / output terminal device at that time, it may be transmitted via the downlink data channel corresponding to the uplink data channel.

As described above, the signal channel has a multi-frame structure, and transmission / reception of signal information for all the accommodated input / output terminal devices is performed at fixed time intervals. When allocating to the input / output terminal devices that perform transmission / reception, the input / output terminal devices can be controlled in a state where the input / output terminal devices having the number of data channels or more are accommodated.
In addition, the central control unit can send and receive information to and from the input / output terminal unit by the insertion / extraction function in the normal call processing operation with respect to the time slot on the PCM highway, and easily by the switching function in the time division network. Communication between the input and output terminal devices is also possible.

〔Example〕

 Hereinafter, the present invention will be described with reference to FIGS.

First, a system configuration of an example of the time division switch according to the present invention is as shown in FIG.

That is, the time-division network 2 including the time-division exchange switch circuit 2-1 and the time-division exchange control circuit 2-2 is configured by the central control device 1 including the central control device 1-1 and the main memory 1-2. The time-division exchange is controlled so that the time-division network 2 also requires 256 I / O terminal devices 4 ₁ which are required for maintenance and operation.
~ 4 ₂₅₆ are idle channel control device 3, time division multiplexing PC
It has been accommodated via the M Highway 5. On the time division multiplexed PCM highway 5, for example, 32 channels in total (30 data channels, 2 signal channels), speed
Data information and signaling information is uplink at 2MHz, is adapted to be transmitted and received in the downlink direction, start request from any one or more of the input-output terminal ₄₁ to ₂₅₆ also by conventional RS232C, GPIB interface like branches The control circuit 3-2 in the empty channel designation control device 3 through the connected monitoring / control signal line 6
Is to be conveyed to. In the control circuit 3-2, the activation request signals are displayed by the dropper inserter 3-3 on the bits in the upstream signal channel corresponding to each input / output terminal device on the PCM highway 5. On the PCM highway 5, the upstream and downstream signal channels have a multi-frame structure. In this example, the activation request signals from all the input / output terminal devices 4 ₁ to 4 ₂₅₆ are 64 frames at an 8 ms cycle, and the switch side uses the upstream signal channels. It can be sent to. In the time-division network 2, the activation request signals are once stored in the memory in the time-division exchange switch circuit 2-1 as in normal call processing, and then the common bus 1-under the control of the time-division exchange control circuit 2-2. 3 and is notified to the central processing unit 1-1. In the central processing unit 1-1, when a start request is issued from any one or more of the input / output terminal devices 4 ₁ to 4 ₂₅₆ , which data channel is assigned to each input / output terminal device related to the start request. Free data channel instruction information is sent to the free channel designation control device 3. The instruction information together with the input / output terminal device identification information is shared bus 1-3, time division exchange control circuit 2-
After being temporarily stored in the memory in the time division exchange switch circuit 2-1 via 2, the control circuit 3 via the PCM highway 5 and the dropper inserter 3-3 as downlink signal channel information.
-2, and further, when it is notified to the input / output terminal device related to the activation request via the signal line 6, the control circuit 3-2 thereafter sends the data information from the input / output terminal device to the branch connection type upstream PCM. Through the highway, the time slot shifter 3-1 is controlled so as to obtain the uplink data channel information designated by the empty data channel indication information. The data information from the input / output terminal device is transmitted through the PCM highway 5 and the time division exchange switch circuit 2-1 by the time division exchange control circuit 2-2 by the time slot extraction function implemented in the normal call processing by the central control unit 1. It is supposed to be sent to. On the other hand, the data information from the central control unit 1 to the input / output terminal unit is, for example, the central processing unit 1-
1 reads the data information on the main memory 1-2 via the common bus 1-3, and the time-division exchange control circuit 2-2 inserts the time slot for call processing via the common bus 1-3 into the PCM highway 5 Information is transmitted to the idle channel designation control device 3 as the above predetermined downlink data channel (usually, the downlink data channel having the same number as the uplink data channel). The time slot shifter 3-1 in the idle channel designation control device 3 performs the same control as that on the upstream side to the corresponding input / output terminal device, and the data information from the central control device 1 via the branch-connected downlink PCM highway. Is transmitted.

If all the upstream data channels are in use and a new activation request is issued from the input / output terminal device, the central processing unit 1-1 sends the idle channel designation control device 3 a channel busy by the downstream signal channel. Information is to be sent out. Dropper Inserter 3
The control circuit 3-2 sends the channel busy information to the corresponding input / output terminal device through the signal line 6 based on the information from -3.

As described above, between each input / output terminal device and the exchange
Data channel information and signal channel information are transmitted and received via the PCM highway, and FIGS. 2 and 3 show channel allocation on the upstream and downstream PCM highways, respectively.

As shown in FIG. 2 and FIG. 3, one frame is 32 channels and 64 frames are one multi-frame, and the multi-frame is transferred in the up and down direction in a cycle of 8 ms. First uplink activation request and recovery request from ₄₁ to ₂₅₆ each output terminal in the PCM on highway, all housed output terminal ₄₁ to _256, respectively to the real from the man-machine interface Choice It needs to be managed in a timely manner. Therefore, a transfer method of 8 ms is adopted with 64 frames as one multi-frame, and the 16th channel (CH16) in each frame is a signal between each of the input / output terminal devices 4 ₁ to 4 ₂₅₆ and the central control unit 1. It is set as a channel (for transfer). Each CH16 is is an 8-bit configuration, the first four bits has a one fixedly allocated to the input and output terminal ₄₁ to ₂₅₆ each for the start / recovery. That is, CH16 in each frame transfers activation / recovery requests for four input / output terminal devices, so that one multi-frame as a whole has 256 (4 × 64).
It is possible to transfer start / recovery requests for _one input / output terminal device 41 to ₂₅₆ . On the other hand, input / output terminal devices 4 ₁ to 4
_For each _256, the latter 4 bits of each CH16 correspond to the input / output terminal device in a one-to-one correspondence with the transmission / reception request from the other terminal that does not require so much real-time performance, the database read switching request during communication, etc. If it is free without being sent, it will be sent as freely usable. In each frame, the 0th channel (CH0) is used as a channel (a type of signal channel) used for frame signals for multiframe control, and the other channels (CH1 to C1).
H15, CH17 to CH31) (30 channels in total) are assigned as variable channels for data transfer. The variable channel mentioned here is defined as a channel to which an input / output terminal device which is in use (issues a start request) can be arbitrarily assigned if it is available.

To describe now the downlink PCM highway, output terminals 4 ₁ as free data channel location information sent from the central control unit 1 to the free channel designation control unit 3
4 _256- compatible device identification information (device No.) and empty data channel No. on PCM highway 5 are required, but in this example, CH16 bits in two consecutive frames, that is, 16 bits, are used to create one empty data. Channel position information is to be transferred. However, PCM highway 5
Since the upper data channels are 30 channels, the maximum number of I / O terminal devices that can communicate at the same time is 30. Therefore, it is sufficient that the number of bits for designating the vacant data channel No. is 5 (30 < ²⁵ = 32). Also,
Since all of the input / output terminal devices 4 ₁ to 4 ₂₅₆ can be used and communicated, 256 kinds of device numbers, that is, 8 bits are sufficient (2 ⁸ = 256). The free data channel No. and the device No. are allocated as shown in the figure, but the remaining 3 bits can be used for signal transfer which does not require so much real time.

As described above, the data communication channel for the input / output terminal device can be freely designated by the central controller,
By using a PCM highway connected to the time division exchange network as the data communication channel, a large number of input / output terminal devices can be controlled by the small capacity PCM highway. The input / output terminal device can be controlled by normal call processing control. In addition to the general input / output terminal device, various types of high-performance terminals such as a personal computer and a relay stand can also be used as the input / output terminal device. It will be able to be accommodated.

〔The invention's effect〕

As explained above, the normal call processing program can be diverted without installing a data channel device or a special input / output terminal device in the central control system of the time-division switch, and it is easy to control a large number of input / output terminal devices. Can be realized in
Not only can the central controller be made smaller and more economical, but the expansion of the exchange program can be prevented. Also,
When controlling a large number of input / output terminal devices, the number of communication channels with the central control device will be greatly reduced.

[Brief description of the drawings]

FIG. 1 is a diagram showing a system configuration of an example of a time division exchange according to the present invention, and FIGS. 2 and 3 are diagrams showing examples of channel allocation on an upstream and a downstream PCM highway, respectively. 1 ... Central control unit, 2 ... Time division network, 2-
1 ... Time-division exchange switch circuit, 2-2 ... Time-division exchange control circuit, 3 ... Free channel designation control device, 3-1 ...
... time slot shifter, 3-3 ...... dropper inserter, 4 ₁ to 4 ₂₅₆ ...... input and output terminal, 5 ...... PCM highway.

Claims (3)

(57) [Claims] 1. A plurality of various input / output terminal devices are respectively branched and connected to an upstream / downstream PCM highway and a monitoring / control signal line, and are connected via the upstream / downstream PCM highway and a monitoring / control signal line. Once accommodated in a vacant channel designation control device provided in common to the above various input / output terminal devices, the exchange operation in the time division exchange network is performed through the up / down time division multiplexing PCM highway and the time division exchange network. A control method for accommodating input / output terminals to a time-division switch when the operation is monitored and controlled by the central control unit, which is accommodated in a central control unit for control, and is used for starting or currently in use. The supervisory signal from each of the various input / output terminal devices, which is accompanied by the input / output terminal device identification information, is transmitted by the idle channel designation control device via the supervisory / control signal line in the up time division multiplex. By being set to a signal channel within a predetermined position on the PCM highway, when after being transferred to the central control unit via the division exchange network,
While being scan-monitored, the control signal with the corresponding input / output terminal device identification information as a response to the scan-monitoring result is:
From the central control unit through the time division exchange network, while being set to the signal channel on the downlink time division multiplexing PCM highway, it is extracted by the vacant channel designation control unit, and the corresponding input / output terminal unit is also sent via the monitoring / control signal line. A method for controlling input / output terminal accommodating in a time-division exchange, wherein the operation of each input / output terminal device is controlled by being transferred to each. 2. A time division exchange network according to claim 1, wherein, as a response to the result of the scan monitoring, free data channel position information arbitrarily designated by the central control unit together with corresponding input / output terminal device identification information is used as a control signal. While being set to the signal channel on the downlink time division multiplexing PCM highway via the, extracted by the idle channel designation control device, and transferred to each corresponding input / output terminal device via the monitoring / control signal line, Between each corresponding input / output terminal device and the central control device, data is transferred via the upstream / downstream PCM highway, the idle channel designation controller, and the idle data channel on the upstream / downstream time division multiplexed PCM highway. A method for controlling the accommodation of input / output terminals in a time-division switch. 3. A supervisory signal to a signal channel on an uplink time division multiplexed PCM highway according to claim 1,
The control signals for the signal channels on the downlink time division multiplexed PCM highway are both set in the multi-frame format.
A method for controlling the accommodation of input / output terminals in a time division exchange, which is transmitted and received.