JPH02182035A - Transmission device concentration method - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Summary] Regarding the line concentration method of the CEPT-based primary group PCM0 line concentrator,
The purpose is to provide an overhead line system for transmission equipment that has a highly efficient line concentration function and can be manufactured at a lower cost. For a multi-frame consisting of a predetermined number of frames consisting of signal time slots, control signals for m (n>m) channels are inserted into the control signal time slots of each frame to multiplex m channels. In a line concentrator that has a control circuit that sends converted signal data to a transmission path, an n-channel control signal that inserts a control signal for each of the n channels into each bit of a control signal time slot is inserted into the control circuit. An insertion circuit is provided and configured to transmit the control signal together with m channels of multiplexed signal data.

[Industrial Application Field] The present invention relates to an improvement in the line concentration method of a line concentrator for a CEPT-based primary group PCM.

At this time, there is a need for a line concentration system for transmission equipment that has a highly efficient line concentration function and can be manufactured at a lower cost.

[Prior Art] FIG. 4 is a block diagram showing the configuration of a conventional line concentrator.

FIG. 5 is a diagram showing a method of allocating channels (hereinafter referred to as CH) to 16 time slots (hereinafter referred to as TS) in a conventional example.

In FIG. 4, for example, a channel (hereinafter referred to as CI)
When making a call from subscriber 1 to subscriber 5 on the other side,
First, subscriber 1 dials the telephone number of subscriber 5, the other party. The dial signal is then transferred to the line concentrator 2 via the subscriber line. In the line concentrator 2, the CH interface section 2-1 receives this and transfers it to the transmission monitoring circuit 2-2. The transmission monitoring circuit 2-2 monitors the transmission of dial signals from the subscriber, and in this case detects the transmission from C111 and outputs a detection signal to the traffic control circuit 2-4.

Figure 5 shows that a multiframe consists of 16 frames, and a frame consists of frame bits (Fo, F, 1, FI
5), for example, TSI to TS15 and TS17 to TS31 for audio data, and TS16 for control, and each TS is made up of, for example, 8 bits. Of the 8 bits of TS16 of the 16 frames constituting l multiframe,
The first four bits are called F bits, and the latter four bits are called spare bits. TS16 of the first frame ■ is an empty bit and is not used, and TS16 of the second frame ■ uses the first 4 bits 1- (F bit) for cH1 and the second half 4 bits.
A bit (spare bit) is used for Cl16, and 1 pin is used each to insert control signals (outgoing signal, incoming signal, etc.) for C111 and C1116.

Thereafter, in the same manner, one bit of each C)I control signal is sequentially inserted into TS16 of each frame (1) to (2) as shown in FIG. 2(b).

The above-mentioned traffic control circuit 2-4 receives the detection signal and converts the outgoing signal of Cl11 into a frame ■ as described above.
The signal is inserted into one bit of the F bit of , and is output to the matrix switch 2-3, and is also output to the line concentrator 3 of the opposite station via the data link.

The matrix switch 2-3 connects the TS specified by the control signal and the input transmission signal CHI.

When audio data is transferred from the subscriber of Cl 11, the audio data is input to a multiplexing circuit (hereinafter referred to as MUX) 2-5 via a route connected to the matrix switch 2-3. In MUx2-5, other C
For example, 30 channels are multiplexed together with voice data manually inputted from subscriber B via the matrix switch 2-3 in the same manner as described above.

Then, it is sent from MUX2-5 to the transmission path.

On the other hand, in the line concentrator 3, the outgoing signal transferred from the traffic control circuit 24 to the traffic control circuit 3-4 of the line concentrator 3 via the data link, and the C11 number and T
The S number connection information is transferred to the matrix switch 3-3.

Further, the MUX 3-5 receives 30 CH multiplexed PCH signal data from the transmission line, separates the multiplexed data, and outputs the multiplexed data to the matrix switch 3-3. The matrix switch 3-3 performs connections from each TS back to each CHI in response to a control signal from the traffic control circuit 3-4.

Then, the signal data of each CH is transferred to the C1l interface section 3.
1 to the subscriber line. The signal data is transferred from the subscriber line via the exchange 4 to the desired subscriber 5.

In this way, dial signals and the like were transferred from the subscriber to the other subscriber.

[Problem to be solved by the invention]

However, in the above-mentioned line concentration formula, the outgoing/incoming call information, the C11 number for connection, and the corresponding TS
Since the data link was constructed using spare bits and IC 8 parts for the number information, there was a problem in that it required unconfigured hardware and a device to prevent malfunctions, making it expensive.

Further, since a signal protocol is required between the devices, there is a problem that the response time becomes long and the line concentration function deteriorates.

Therefore, an object of the present invention is to have a highly efficient line concentration function,
The object of the present invention is to provide a line concentration system for transmission equipment that can be manufactured at a lower cost.

[Means to solve the problem]

The above problem is solved by the configuration of the device shown in FIG.

That is, in FIG. 1, signal data from an n-channel subscriber line is input, and a multiframe consisting of a predetermined number of frames each consisting of time slots for frame bits, signal data, and control signals is processed. , m (n>m) in the control signal time slot of each frame.
In a line concentrator having a control circuit 240 that inserts a control signal related to a channel and sends it out to a transmission line for transmitting m channels of multiplexed signal data, 245 is provided in the control circuit, and 245 is provided in the control circuit to insert a control signal for each channel and send it out to a transmission path for transmitting multiplexed signal data of m channels. This is an n-channel control signal insertion circuit that inserts a control signal for each of the n channels into the n-channel control signal insertion circuit.

The control signal is then configured to be transmitted together with m channels of multiplexed signal data.

[For production]

In FIG. 1, an n-channel control signal insertion circuit 245 inserts a control signal for each n-channel into each bit of a control signal time slot. Then, the control signal is sent to the transmission path together with the m-channel multiplexed signal data.

As a result, control signals for each of the n channels can be transferred, which facilitates traffic control and eliminates the need for a data link configuration.

〔Example〕

FIG. 2 is a block diagram showing the configuration of an apparatus according to an embodiment of the present invention.

FIG. 3 is a diagram showing a C11 allocation method for TS16 in the embodiment.

The same reference numerals indicate the same objects throughout the figures.

The audio data remains for 30 channels, and the control signal TS16
By allocating 120 CII to the line concentrator 2o, the transmission path is made to have a format of 12 OcH. That is, as shown in FIG.
, b, , c, and d) and 4 bits of spare bits) are allocated to each CH.

The above operation will be explained below.

That is, in FIG. 2, a dial signal from, for example, CHI is received by the C)I interface section 21 of the line concentrator 20 and transferred to the outgoing call monitoring circuit 22. The transmission monitoring circuit 22 receives this and sends the detection signal to the traffic control circuit 24.
output towards.

In the traffic control circuit 24, as mentioned above, for example, in the case of an outgoing signal from CHI, a of TS16 of frame
A control signal indicating a transmission signal from CHI is inserted at the position. When receiving a transmission signal from another C1+, the corresponding C1+ is similarly placed in the corresponding position of TS16 of the corresponding frame.
Insert a control signal indicating the outgoing signal from H.

The control signal is outputted to the matrix switch 23. 7 trix switch 23 connects the outgoing signal data from C) II to the corresponding TS, and sends the output to MUX2.
Add to 5. The MIIX 25 multiplexes, for example, 30 C0 data together with the transmission signal data from other CIs, and sends it out to the transmission path.

On the other hand, in the concentrator 30, the MIJX 35 receives outgoing signal data from the transmission line and separates the multiplexed data.

The output is then applied to the transmission monitoring circuit 36. The transmission monitoring circuit 36 extracts the control signal and applies the output to the matrix switch 33 via the traffic control circuit 34.

The control signal inserted into the TS by the matrix switch 33 is returned to the corresponding C11. The output of the matrix switch 33 is then sent to the subscriber line via the CH interface section 31. The control signal from the subscriber line is transferred to the desired subscriber 50 via the exchange 40.

As a result, control signals on transmission paths corresponding to, for example, 120 CHs are created, which facilitates traffic control and eliminates the need for a data link configuration.

FIG. 4 is a block diagram showing the configuration of a conventional line concentrator, and FIG. 5 is a diagram showing a CI allocation method of the TS 16 in the conventional example.

In the figure 245 is an n-channel control signal insertion circuit shows.

〔Effect of the invention〕

As described above, according to the present invention, it is possible to realize a line concentration system for a PCM transmission device that has a highly efficient line concentration function and can be manufactured at a lower cost.

′″−Slide

[Brief explanation of the drawing]

FIG. 1 is a diagram showing the principle of the present invention. FIG. 2 is a block diagram showing the configuration of an apparatus according to an embodiment of the present invention. FIG. 3 is a diagram showing a C1l distribution method of TS16 in the embodiment. Figure 1 Figure 3

Claims (1)

[Claims] For multiframes in which signal data from an n-channel subscriber line is input and each frame is composed of a predetermined number of frames each consisting of time slots for frame bits, signal data, and control signals. , a control circuit (240) that inserts control signals related to m (n>m) channels into the control signal time slots of each frame and sends the multiplexed signal data of m channels to a transmission path. In the apparatus, the control circuit is provided with an n-channel control signal insertion circuit (245) that inserts a control signal for each of the n channels into each bit of the control signal time slot, and the control signal is inserted into the m channels. A concentrating system for a transmission device, characterized in that it is transmitted together with multiplexed signal data.