JPH0479535A - Standby system monitoring method - Google Patents

Abstract

PURPOSE:To miniaturize a test signal generating section and a test signal detection section and to reduce power consumption by using a DC voltage in place of a PN pattern as a test signal. CONSTITUTION:The system consists of a test signal generating section 2, a sending end switching section 3, a standby transmission logic section 4, a standby reception logic section 5, a reception switching section 6 and a test signal detection section 7. Then the standby transmission logic section 4 inserts relevant detection information to a designated time slot in a prescribed frame format signal when a 1st DC voltage detection section 41 detects a DC voltage from a DC voltage superimposing section and sends the result to a reception side and the standby reception logic section 5 sends a relevant DC voltage to the test signal detection section 7 when the information detection section detects the detection information from the reception signal, the test signal detection section 7 uses the DC voltage detected by a 2nd DC voltage detection section 71 to monitor the connection state of the standby system. That is, the DC voltage is used in place of a PN pattern as a test signal. Thus, the test signal generating section and the test signal detection section are miniaturized and the power consumption is reduced.

Description

[Detailed Description of the Invention] [Summary] For example, regarding a backup system monitoring method used in a multiplex radio system having a working system and a backup system, the present invention aims to reduce the size and power consumption of a test signal generation unit and a test signal detection unit. For the purpose of When connecting a test signal detection section to a receiving end logic section using a switching section to monitor a backup system, a DC voltage superimposition section is connected to the test signal generation section, and a first DC voltage detection section is connected to the backup transmission logic section. The preliminary reception logic section is provided with an information detection section, the test signal detection section is provided with a second DC voltage detection section, and the preliminary transmission logic section is configured such that the first DC voltage detection section detects the DC voltage. When detecting the DC voltage from the superimposed part, the corresponding detection information is inserted into a designated time slot in the signal of the predetermined frame format and sent to the receiving side, and the preliminary reception logic section determines that the information detection part is the received signal. When the detection information from the second DC voltage detection section is detected, the corresponding DC voltage is sent to the test signal detection section, and the test signal detection section uses the DC voltage detected by the second DC voltage detection section to connect the backup system. Configure to monitor status.

[Industrial application field]

The present invention relates to a protection system monitoring method used, for example, in a multiple radio system having a working system and a protection system.

Generally, transmission It is common to have spare equipment for important equipment on the road.

One of the methods for arranging this backup device is the system backup method. In this method, in addition to the current system, a backup system using another radio frequency is prepared in advance, and when the current system fails, the system is switched to the backup system in units of specific switching sections.

When the active system is normal, test signals are transmitted to the backup system to constantly monitor whether the backup system is normal or not. It is also necessary to downsize and reduce power consumption the test signal generation section and test signal detection section for monitoring the state of the test signal.

[Conventional technology]

Figure 4 is an N:l microwave multiplex radio system configuration diagram, Figure 5 is a TSW connection diagram in Figure 4, and Figure 6 is an R in Figure 4.
A 3W connection diagram is shown.

The operation of FIG. 4 will be explained below with reference to FIGS. 5 and 6. Note that all current systems operate in the same way, so #1
This will be explained using a current system as an example.

(1) Normal operation of the current system. First, the bipolar format # from the frame sending terminal station (not shown) is transmitted.
The main signal is input to the #1 transmission switching unit (hereinafter abbreviated as TSW+).

Since TSW is connected as shown in Figure 5, I
The Ill main signal is divided into two by the hybrid 17, one of which is divided into two by the Ill bipolar/unipolar converter shown in FIG. 4 (hereinafter referred to as "Ill").

After being converted into a unipolar signal by a B/U (abbreviated as converter), it is applied to the transmitter 11, but the other end is terminated. The unipolar signal input to the transmitter is then applied to a transmitter logic section (hereinafter abbreviated as T-LOG), not shown.

In T-LOG, the input signal is divided and speed-converted in parallel to create a gap, and a frame synchronization signal, digital control line signal, parity bit, etc. used in the wireless section are added to this gap to convert it into a signal in a predetermined frame format. do. Then, after scrambling the frequency spectrum to make it smooth, the signal is sent to a modulation section (not shown).

The modulator modulates the carrier wave with the output of the T-LOG, and then converts it into a predetermined frequency and power in a transmitting section (not shown) and sends it to the receiving side.

On the receiving side, the receiving section (not shown) in the receiving section 12 and the receiving logic section (hereinafter abbreviated as R-LOG) perform the opposite processing to that on the transmitting side, and after separating additional bits such as parity bits, #1 unipolar/bipolar converter (hereinafter abbreviated as U/Bl converter)
11 signal and sends it to the receiving end switching unit (hereinafter abbreviated as R3W).

R3W, as shown in Figure 6, sends #11 signal to switch S.
It is sent to the #1 carrier terminal station via WB.

On the other hand, while the current system is normal, the operating state of the standby system is monitored using the test signal transmitter 13 and the test signal detector 16, as will be described later.

(2) Ill Current System Failure Occurrence #1 When a failure occurs in the current system, failure occurrence information is sent from the receiving side to the transmitting side, so the transmitting side drives TSW+ shown in FIG. Therefore, #l main signal is hybrid 17. The signal is also sent to the backup system via the switch SW2, which is in the state shown by the dotted line, and the backup B/U 14.

On the receiving side, the receiving section 12. The #11 signal reproduced via the U/B converter 15 is input to R3W shown in FIG. #l Sent to the carrier terminal station.

Next, FIG. 7 is a block diagram of a conventional example, FIG. 7(a) is a block diagram of a test signal sending section, FIG. 7(b) is a block diagram of a test signal detecting section, and FIG. 7(C) is a block diagram of a test signal sending section. shows an example of the transmission format, and the operations of the test signal transmission section and the test signal detection section will be explained with reference to FIGS. 4 to 6.

Now, the PNN butter generation section I31 and the frame synchronization signal generation section 132 in the test signal transmission section generate a PN pattern and a frame synchronization signal, respectively, and send them to the insertion section 134.

On the other hand, this insertion section normally outputs a PN pattern, and when the timing from the timing generation section 133 is added, it outputs a frame synchronization signal, so the format shown in FIG. 7(C) is A test signal is applied to TSWN of FIG. 4 via U/B converter 135.

Therefore, this test signal is sent to the receiving side via N TSWs TSW N to TSW+, the B/U converter 14, and the transmitter 11.

On the receiving side, the receiving section 12. After the test signal is regenerated by the U/B converter 15, N R3Ws of R3W, ~R3WN
The test signal is applied to the test signal detection section 16 via the test signal detection section 16.

That is, in the TSW, as shown in FIG. 5, the test signal is transmitted to the switch SW3. The test signal is applied to the U/B converter of the backup system through N switches such as SWI (see Figure 4), and in R3W, the test signal is applied to the U/B converter of the backup system as shown in Figure 6. is applied to the test signal detection section through N switches such as switches SWe and SW7, which are in the solid line state.

In addition, the B/U converter 14. Transmission unit 11. Receiving section 1.2.
The U/B converter 15 performs the same processing as that for the main signal described above. Furthermore, the format of the test signal is bipolar in order to match the format of the signal sent out from the carrier terminal station.

Furthermore, the test signal sending section may be selected by a switch so that it can send out the above test signal or a test signal with only a PN pattern.

Now, the test signal applied to the test signal detection section is shown in Figure 7 (
As shown in b), it is added to the frame synchronization signal detection section 162. Since the correct frame synchronization signal from the frame synchronization signal generator 1.61 is added here, the test signal is shifted one bit at a time to detect the frame synchronization signal.

If the frame synchronization signal is detected, the backup system determines that the system is normal and does not send out an alarm, but if the frame synchronization signal is not detected, it determines that a failure has occurred in the backup system and issues an alarm.

[Problem to be solved by the invention]

Here, the test signal sending unit generates and sends out a plurality of types of test signals, such as a PN pattern with a frame synchronization signal inserted, only a PN pattern, or a different PN pattern.

Further, the test signal detection section compares each bit one by one to check whether it is a frame synchronization signal or not.

Therefore, there is a problem that the circuit scale of the test signal sending section and the test signal detecting section becomes large, and power consumption is also large accordingly.

An object of the present invention is to reduce the size and power consumption of a test signal generation section and a test signal detection section.

[Means to solve problems]

FIG. 1 shows a block diagram of the principle of the present invention.

2 is a test signal generation section, 3 is a transmission end switching section, and 4 is a preliminary transmission logic section that logically processes an input signal and converts it into a signal of a predetermined frame format.

Further, 5 is a preliminary reception logic section that performs an operation opposite to that of the transmission logic section, 6 is a receiving end switching section, and 7 is a test signal detection section.

Furthermore, 21 is a DC voltage superimposition part, and 4], 7] are the first
It is a second DC voltage detection part, and 51 is an information detection part.

The preliminary transmission logic section inserts corresponding detection information into a designated time slot in the signal of the predetermined frame format when the [th] DC voltage detection section detects the DC voltage from the DC voltage superimposition section. The preliminary reception logic section sends a corresponding DC voltage to the test signal detection section when the information detection section detects detection information from the received signal, and the test signal detection section The connection state of the standby system is monitored using the DC voltage detected by the second DC voltage detection section.

That is, since a DC voltage is used instead of a PN pattern as a test signal, the test signal generating section and the test signal detecting section can also be made smaller and have lower power consumption.

[Effect]

In order to monitor the backup system, it is necessary to check the line quality of the backup system, the connection status from the test signal generation section to the backup transmission logic section, and the connection status from the backup reception logic section to the test signal detection section.

In the present invention, the quality status of the backup system is checked using a parity check as in the conventional example, but the connection status j is checked using a simpler method.

That is, a bipolar signal, for example, on which a DC voltage is superimposed is sent from the test signal generation section to the preliminary transmission logic section via the transmission end switching section as a test signal.

The preliminary transmission logic section detects a DC voltage with an internal first DC voltage detection section, inserts detection information of, for example, I I+ into a designated time slot in a signal of a predetermined frame format, and sends it to the preliminary reception logic section.

In the preliminary reception logic section, the information detection section detects "'1" from the received signal.
When the detection information ``'' is detected, a DC voltage is superimposed on the bipolar signal sent from the preliminary reception logic section and sent to the test signal detection section via the receiving end switching section.

If the second DC voltage detection part of the test signal detection part detects DC voltage, the connection between the sending end switching part and the receiving end switching part is normal. It is determined that the backup system is disconnected.

Furthermore, since the parity bit is extracted in the preliminary reception logic section as in the conventional example, by adding the parity check result of the preliminary system to the OR gate, it is possible to check the connection and quality of the preliminary system.

That is, since a DC voltage is used instead of a PN pattern as a test signal, the test signal generating section and the test signal detecting section can also be made smaller and have lower power consumption.

〔Example〕

FIG. 2 is a block diagram of an embodiment of the present invention, and FIG. 2(a)
2 shows the transmitting side, FIG. 2 (one) shows the receiving side, and FIG. 3 shows an operation explanatory diagram of FIG. 2.

Here, the symbols on the left side of FIG. 3 indicate the waveforms of the portions with the same symbols in FIG. 2(a). Further, the U/B converter 22 and the DC voltage superimposition section 21 are the constituent parts of the test signal generation section 2, and the DC voltage detection section 41. ．． B/U converter 14. The transmit logic section 42 is a component of the preliminary transmit logic section 4, the receive logic section 5], i, the IJ/B converter 15. DC voltage superimposition part 5
12 is a component of the preliminary reception logic section 5, a DC voltage detection section 7], and an OR gate 72 is a component of the test signal detection section 7.

The operation shown in FIG. 2 will be explained below with reference to FIGS. 3 and 4.

First, as shown in FIG. 2(a), l is applied to the U/B converter 22 in the test signal generating section, but due to the input clock, a bipolar signal as shown in FIG. The DC voltage superimposition section 21 converts the voltage into a DC voltage superimposed section 21.

In the DC voltage superimposition part 21, as shown in FIG. DC voltage is superimposed on the DC voltage detection part 41 via TSWN-TSW.
and is sent to the B/U converter 14.

Therefore, the DC voltage detection part is a DC voltage■. If it is detected, it sends 1, for example l, and when it does not, it sends 0.
T-LOG) 42. Further, the B/11 converter 14 converts the bipolar format signal into a unipolar format signal and sends it to the same <T-LOG 42.

Therefore, T-LOG 42 uses a unipolar format signal,
For example, the detection information of 1 is generated into a signal in a predetermined frame format and sent to the receiving side.

On the receiving side, as shown in Figure 2(b), the receiving logic part (
A unipolar format signal and detection information are extracted from the predetermined frame format signal input in R-LOG) 511, and the former is sent to the U/B converter 15 and the latter to the DC superimposition section.

The U/B converter 15 converts the input signal into a bipolar format signal and sends it to the DC superimposition section, so here the DC component V
. is superimposed and the signal shown in FIG. 3-- is reproduced.

The signal shown in FIG. 3-■ is a DC voltage V at the DC voltage detection section 71 in the test signal detection section. is detected, O is sent out from this detection part via the OR gate 72, and the connection from the test signal generator to the TSW to the backup B/U and the backup U
/B-R3W- It can be checked that the connection at the test signal detection section is normal.

Note that since the R-LOG 511 extracts the parity pits as in the conventional example, by adding the parity check result of the backup system to the OR gate, it is possible to check the quality of the backup system as well.

That is, since a DC voltage is used instead of a PN pattern as a test signal, it is possible to reduce the size and power consumption of the test signal generation section and the test signal detection section.

〔Effect of the invention〕

As described above in detail, the present invention has the effect of reducing the size and power consumption of the test signal generating section and the test signal detecting section.

[Brief explanation of the drawing]

Fig. 1 is a block diagram of the principle of the present invention, Fig. 2 is a block diagram of an embodiment of the present invention, Fig. 3 is an explanatory diagram of the operation of Fig. 2, and Fig. 4 is a block diagram of the N:] microwave multiplex radio system. , FIG. 5 shows a TSW connection diagram in FIG. 4, FIG. 6 shows an R8W connection diagram in FIG. 4, and FIG. 7 shows a block diagram of a conventional example. In the figure, 2 is a test signal generation section, is a sending end switching section, is a preliminary transmission logic section, is a preliminary reception logic section, is a receiving end switching section, 4I is a first DC voltage detection section, 51 is an information detection section, 71 indicates a second DC voltage detection portion. 1 word, 1 rule, father, 1 word, 1 rule, Igbo circulation an'an (Kotoyoshi Kai, Satobe Honkyomon's principle Pro... Nofu Diagram 1 ○

Claims (1)

[Scope of Claims] 1. A multiplex radio system having a working system and a backup system, which includes a backup transmission logic unit (4) on the transmitting side that logically processes an input signal and converts it into a signal in a predetermined frame format. , a transmission end switching section (3), and a test signal generation section (2), and a preliminary reception logic section (5) that performs an operation opposite to that of the transmission logic section on the reception side.
), a receiving end switching section (6), and a test signal detecting section (7) are installed respectively, and when the current system is transmitting the main signal normally, the transmitting end uses the sending end switching section to detect the test signal generating section. is connected to the backup transmission logic section, and on the receiving side, when connecting the test signal detection section to the reception end logic section using the reception end switching section to monitor the backup system, a DC voltage superimposed section is connected to the test signal generation section. (21), a first DC voltage detection section (41) in the preliminary transmission logic section, an information detection section (51) in the preliminary reception logic section, and a second DC voltage detection section in the test signal detection section. (71), and when the first DC voltage detection section detects the DC voltage from the DC voltage superimposition section, the preliminary transmission logic section transmits the corresponding detection information into the signal of the predetermined frame format. When the information detection section detects detection information from the received signal, the preliminary reception logic section sends the corresponding DC voltage to the test signal detection section, 1. A backup system monitoring method, wherein the test signal detection section monitors a connection state of the backup system using the DC voltage detected by the second DC voltage detection section. 2. The test signal detection section logically ORs the alarm output from the second DC voltage detection section and the quality status alarm of the backup system, and outputs the result as a backup system alarm. Backup system monitoring methods.