JPH0440022A - Duplexing/synchronizing method for extraction/insertion part for auxiliary signal of intermediate repeater station - Google Patents

Abstract

PURPOSE:To completely duplex an active line and an auxiliary line both in the transmission and reception systems of an intermediate repeater station in a comparatively simple circuit and to improve the reliability of transmitting the auxiliary signal in the repetition of microwaves by providing two active and auxiliary frame multiplexing parts. CONSTITUTION:A circuit 8 is provided to execute a data processing for transmission while inputting the main signal data and timing signal of one line which state is decided as satisfactory and selected on a reception side 10 of the intermediate repeater station, and active and auxiliary frame multiplexing parts 50 and 51 are provided to mutually exchange and synchronize the timing signals for multiplexing the frame of the auxiliary signal. Then, a selection and decision part 6 is provided to decide the quality of each equipment and to select the better one. The selection and decision part 6 on a transmission side 20 synchronously selects one of the frame multiplexing parts 50 and 51, the frame of the auxiliary signal newly generated for transmission is selected, multiplexed to the frame of the main signal data of the line and transmitted to a following station after inserting the auxiliary signal. Thus, the line is duplexed by the simple circuit and the reliability can be improved.

Description

[Detailed Description of the Invention] [Summary] An auxiliary signal is extracted and separated from the data of the working line and protection line received from the previous station on the receiving side of the intermediate relay station, and an alarm indicating the status of the working line and protection line is generated. LM...ALM
. Based on the main signal data and timing signal of one of the working or standby lines that was determined to be in good line condition according to step 1 and the timing signal, the frame of the auxiliary signal newly generated on the transmitting side of the relay station is replaced with the frame of the main signal data. Regarding the duplication method of the auxiliary signal extraction and insertion section of the intermediate relay station that multiplexes, inserts the same auxiliary signal, and transmits it to the subsequent station, the status is detected by an alarm indicating the status of the working line and protection line on the receiving side of the intermediate relay station. The frame multiplexing unit that multiplexes the frame of the auxiliary signal to the downstream station on the transmitting side with the frame of the main signal of the one line that has been determined to be good and has been selected is duplicated with a simple circuit, and the auxiliary signal frame on the receiving side The purpose is to provide a duplex synchronization method for the auxiliary signal extraction and insertion section of an intermediate relay station in which the selection of one signal extraction line and the insertion of an auxiliary signal on the transmitting side are synchronized. A circuit that inputs the main signal data and timing signal of one selected line and processes the data for transmission, and a circuit that inputs the processed data to both lines at the same time as the receiving side line is selected, and uses it for frame multiplexing of individually generated auxiliary signals. an intermediate frame multiplexing section that determines the quality of each device in the working and backup frame multiplexing sections and selects the better one; When one of the working and protection lines on the receiving side of a relay station fails and the other line is selected, the selection judgment unit on the sending side synchronously selects one of the working and protection frame multiplexing units on the sending side. The receiving side selects the auxiliary signal frame newly generated for transmission, multiplexes it with the main signal data frame of the line, inserts the auxiliary signal, and transmits it to the downstream station.

[Industrial application field]

The present invention relates to a microwave relay system, and particularly to a working line and a protection line at an intermediate relay station of a system in which auxiliary signals such as low-speed meeting signals and supervisory control signals are inserted into main signals such as high-speed PCM multiplex signals and transmitted. This invention relates to a method for synchronizing an extractor and an inserter of duplicated auxiliary signals.

Intermediate relay stations in microwave relay systems are often installed in remote mountainous areas, and the installed equipment is required to have high reliability, but complex circuit configurations are not possible due to the need to reduce costs. However, auxiliary signals such as meeting signals and supervisory control signals are duplexed with the working line and protection line synchronized even in the event of a failure, such as when the reception input from the previous station is cut off, and the correctness is guaranteed. It is necessary to send monitoring data and meeting signal data from intermediate relay stations to downstream stations.

[Conventional technology]

As shown in Figure 2, a conventional intermediate relay station extracts an auxiliary signal from received data D, D, which is a composite of the main signal and auxiliary signal of the working line 1 and protection line O received from the previous station. and a spare auxiliary signal extraction section II, 10, a frame separation section 2I, 2° that synchronizes the frames and separates the main signal and auxiliary signal frames, and an alarm ALM + * for out-of-synchronization of the separated line, etc. .

ALM. The signal obtained by determining the states of both lines in the 1 selection determining unit 3 by □ is used as the selection signal SEL, and the data Dll+DOfl of the main signal of the working line or protection line after separating the auxiliary signal and the timing signal tll, tIl
The active/backup selection unit 4 selects one of the lm. Then, in one frame of main signal data selected by the selection unit 4,
The frame multiplexer 5 sends a new auxiliary signal frame for transmission.
After multiplexing at A, the multiplexed frame signal is branched into two, and the same auxiliary signal is inserted in the parallel working and standby auxiliary signal inserting sections 73 and 7°, and the line is connected to the working control line C1 and the standby control line. The configuration was such that C0 was used to transmit to subsequent stations.

[Problem B to be Solved by the Invention] As described above, the conventional intermediate relay station includes the auxiliary signal extractors 11, 10 and the auxiliary signal frame separator 21.2 on the receiving side 10.
゜ and the auxiliary signal insertion section 7517゜ of the transmitting side 20 are duplexed in the working system and the protection system, but the frame multiplexing section 5A that time-division multiplexes the auxiliary signal frame on the transmitting side 20 into the main signal frame is single-multiplexed. It had become.

Therefore, on the transmitting side 20, the control line C1C of the active system and the standby system
Although it is possible to carry the same auxiliary signal on 0 and transmit it in parallel to the subsequent station, it is not synchronized with the receiving side 10. Furthermore, if the negative frame multiplexing unit 5A fails, there is a problem in that it is directly connected to the failure of the control lines C+ and Co of both the duplexed working and standby systems. The problem of the present invention is to provide an alarm ALM that indicates the status of the working line and protection line on the receiving side of the intermediate relay station;
l, ALM. The frame multiplexing section that multiplexes the auxiliary signal frame for transmission to the downstream station on the transmitting side with the main signal frame of one line that is judged to be in good condition and selected by 1 is duplicated using a simple circuit. , and extraction of auxiliary signals on the receiving side.

An object of the present invention is to provide a duplex synchronization method for an auxiliary signal extraction/insertion section of an intermediate relay station, in which selection of a line and insertion and transmission of an auxiliary signal on a transmitting side are synchronized.

[Means to solve the problem]

This problem is solved by extracting an auxiliary signal from the working line and protection line data received from the previous station at the receiving side 10 of the intermediate relay station, as shown in the principle diagram of FIG. 1 showing the basic configuration of the present invention.
10 and the frame separation unit 2. .

Alarms ALM+i and ALM+i, which indicate the status of the working line and the protection line, are separated by 2 degrees, and the judging unit 3 judges that the line condition is good according to ALMom, and the selection unit 4 selects one of the working or protection lines, e.g., the protection line. main signal data D. The frame of the auxiliary signal newly generated at the transmitting side 20 according to the timing signal ton is used as the main signal data D. In the duplication method of the auxiliary signal extraction and insertion section of the intermediate relay station, in which the auxiliary signal is multiplexed into the R frame, the same auxiliary signal is inserted at the insertion section 71, 7°, and transmitted to the downstream station, the condition is good on the receiving side 10. Main signal data Do of one of the selected lines
A data processing unit 8 inputs t and a timing signal tel and processes the data for transmission, and the processed data is input to both at the same time as the receiving side line is selected, and a timing signal jlT+ for frame multiplexing of an auxiliary signal is generated individually. The working and standby frame multiplexing units 56 and 50 mutually exchange jOTs and synchronizing each other, and each equipment alarm ALMIT and ALM of the working and standby frame multiplexing units. a selection determination unit 6 that determines the quality of the nine devices and selects the better one; The selection determination unit 6 on the side 20 selects the active and backup frame multiplexing units 51 on the transmitting side,
50 in a synchronized state, and multiplexes the newly generated auxiliary signal frame for transmission with the main signal data frame of the line selected on the receiving side, inserts the auxiliary signal, and sends it to the downstream station. This is solved by the present invention, which is configured to transmit.

[Function] In the present invention, two frame multiplexing sections 5I and 50, newly provided on the transmitting side 20 of the intermediate relay station, one for use and one for backup, are used for the receiving side 1.
0 selection determination unit 3 separates the alarms ALM+i+ and ALM by the frame separation unit 2I and 2°. 8, the main signal data D of one line, for example, the protection line, is determined to be in good condition with no synchronization loss etc. and is selected by the working/protection selection unit 4. 3 and timing signal t. I1 is input to the data processing section 8 and processed for transmission, and the processed data D is input to both the working/standby selecting section 4 on the receiving side at the same time as the line is selected. Then, separately generated frame multiplexing timing signals t+7. Exchange toyZ mutually and synchronize with each other.

Then, the selection determining unit 6 of the transmitting side 2o determines that there is no equipment failure ALM among the working and backup frame multiplexing units 5I and 50 and connects the auxiliary signal inserting unit 7. or 7° is the frame multiplexing unit 5
．． Alternatively, 50 multiplexes the newly generated and mutually synchronized auxiliary signal frame of its own station with the selected main signal frame, inserts the auxiliary signal, and transmits it to the downstream station.

Therefore, the redundant synchronization method of the auxiliary signal extraction/insertion section of the intermediate relay station according to the present invention is based on the alarm signals ALM, . The sending side 20 transmits the frame of the main signal of one of the lines selected by determining that the line condition is good.
Data processing unit 8. A frame multiplexing section that multiplexes frames of auxiliary signals for transmission to a subsequent station is duplicated using a simple circuit consisting of frame multiplexing sections 51, 509 and selection determination section 6. In addition, since the active/protection selection unit 4 on the receiving side 10 is duplexed in synchronization with the selection signal SEL that selects the protection line, when there is a failure in the receiving system such as a cutoff of the receiving input on the receiving side 10, the transmitting side 20 is switched to the active line. The data of the auxiliary signal of the own relay station can be sent out in a state where the frame multiplexing unit 5I and the standby frame multiplexing unit 50 are synchronized. Further, the problem caused by the conventional frame multiplexing unit having a single configuration is also solved because the transmitting side 20 is completely duplexed in the present invention.

〔Example〕

The principle diagram of FIG. 1 shows the structure of the duplex synchronization method of the auxiliary signal extracting/inserting section of the intermediate relay station according to the embodiment of the present invention, which has already been explained, but will be explained in more detail.

The working and standby auxiliary signal extraction units 13 and 10 on the receiving side 10 of the intermediate relay station extract auxiliary signals from the received data of the working line and the standby line received from the previous station, and the working and standby frame separation unit 21 The frame synchronization of each data is performed at 0.2 degrees, the main signal data D1ml and 001 are separated, and the timing signals t11. Output tllm.

Reception alarms ALM+m and ALM for detection results of frame synchronization and equipment failure, etc. 1, the selection determination unit 3 on the receiving side outputs a selection signal SEL that determines the status of the working line and the protection line and selects it, and this selection signal SEL causes the working/protection selection unit 4 to select one of the lines that has no fault. , for example, the main signal data Dell and timing signal t of the protection line. , and input it to the data processing unit 8 of the sending side 20. The data processing unit 8 of the transmitting side 20 receives this timing signal tel.
is used for input to the main signal data processing section and output to the active and spare frame multiplexing sections 5I and 50 for transmission.

The active and standby frame multiplexing units 50.5e of the transmitting side 20 send respective device alarms ALM+t and ALMoy to the transmitting side selection determining unit 6, and the transmitting side selection determining unit 6 sends the respective device alarms ALM+t and ALMoy to the working and standby frame multiplexing units 51.5e. It determines whether the 50 devices are good or bad, generates a selection determination signal for selecting the good one, and outputs it to the frame multiplexers 50, 50. The active and standby frame multiplexing units 53 and 50 select the selection signals sent by the selection unit 4 of the receiving side 10 when the selection determination signal output from the transmission side selection determination unit 6 is in a state that requires selection by the frame multiplexing units 5I and 50. Signal S
Select the transmission/reception synchronization timing signal SET which is EL, and when the selection determination signal is in a state that does not require selection, select the synchronization timing signal t1 or toy sent out by the frame multiplexing section 5 or 50 of the other party, Generate a frame for multiplexing new auxiliary signals for transmission. Then, a working or standby auxiliary signal inserting section 71 or 7° connected to the frame multiplexing section 51 or 50 inserts the signal from the auxiliary signal generator and transmits it to the subsequent station.

Therefore, the active or standby frame multiplexer 5 . or an auxiliary signal insertion section 7 connected to 50.
or 7° is selected and operated in synchronization with the transmission/reception synchronization timing signal SEL, which is the selection signal of the active/standby selection unit 4 of the receiving side 10, and also the selection determination signal output from the transmission side selection determination unit 6. An auxiliary signal inserting section 7 connected to the frame multiplexing section not selected by 7. Or 7° also operates in synchronization with the transmission/reception synchronization timing signal SEL, which is the selection signal of the reception side selection section 4 of the reception side 10, similar to the output of the selected frame multiplexing section and auxiliary signal insertion section. Receiving side 1
In the event of a failure in the receiving system such as a loss of reception input of 0, there is no problem because the active system and standby system of the transmitting side 20 can send out the auxiliary signal data from the own station in a synchronized state.

〔Effect of the invention〕

As explained above, according to the present invention, it is possible to completely duplicate the working line and protection line for both the transmitting system and the receiving system of an intermediate relay station with a relatively simple circuit, and to prevent failures in one system of the receiving system. Sometimes, it is possible to transmit auxiliary signal data such as meeting signals and monitoring signals from the own relay station while the transmitting system's working line and protection line are synchronized with the receiving system's line switching. The effect of improving the reliability of the transmission of the auxiliary signal can be obtained.

[Brief explanation of drawings]

FIG. 1 is a principle diagram showing the basic configuration of the duplexing synchronization method of the auxiliary signal extraction/insertion section of an intermediate relay station according to the present invention, and FIG. 2 is a block diagram of a conventional duplexing method of the auxiliary signal extraction/insertion section of an intermediate relay station. It is a diagram. In the figure, II and 10 are auxiliary signal extraction units, 24 and 2° are auxiliary signal frame separation units, 3 is a receiving side selection determination unit, and 4
50 and 50 are frame multiplexing units; 6 is a transmitting side selection determining unit; 73 and 7° are auxiliary signal insertion units; 8 is a data processing unit; 10 is a receiving side of an intermediate relay station; 2
0 is the transmitting side of the intermediate relay station.

Claims (1)

[Claims] The receiving side (10) of the intermediate relay station extracts the auxiliary signal from the data of the working line and protection line received from the previous station (1_1,
1_0) and separated (2_1, 2_0) to display alarms (ALM_1_R, ALM_0) that indicate the status of the working line and protection line.
0_R) determines that the line condition is good (3) and selects (
4) The main signal data of one of the working or backup lines (
D_0_R) and timing signal (t_0_R),
The intermediate relay station multiplexes the newly generated auxiliary signal frame on the transmitting side (20) into the main signal data (D_0_R) frame, inserts the same auxiliary signal (7_1, 7_0), and transmits it to the downstream station. In the duplex system of the auxiliary signal extraction/insertion section, the receiving side (10) determines that the condition is good (3
) and selected (4) the main signal data (D
A circuit (8) that inputs _0_R) and a timing signal (t_0_R) and processes the data for transmission, and the timing for frame multiplexing of the auxiliary signals generated by inputting the processed data to both at the same time as the receiving side line is selected. Signal (t_1_
The working and standby frame multiplexing units (5_1, 5_0) that synchronize each other by exchanging frames (T, t_0_T) with each other and the quality of each device in the working and standby frame multiplexing units (ALM_1_T,
A selection determination unit (6) that determines the ALM_0_T) and selects the better one; The selection determination unit (6) on the side (20) synchronously selects one of the working and standby frame multiplexing units (5_1, 5_0), and the newly generated auxiliary signal frame for transmission is sent to the receiving side. A duplex synchronization method for an auxiliary signal extraction/insertion section of an intermediate relay station, characterized in that the auxiliary signal is multiplexed and inserted into a main signal data frame of a selected line and transmitted to a subsequent station.