JPH03106237A - Line changeover control system - Google Patents

Abstract

PURPOSE:To attain active - standby line switching in the case of 1:1 route standby system radio line and to install a line switching control means in the case of the N:1 route standby system radio line by providing a reception processing means, a transmission processing means and an alarm processing switching logic means to a MODEM switching means for an active line. CONSTITUTION:A standby side MODEM switching means 1 and an active side MODEM switching means 2 are provided and a line switching controller interface section 4 is provided to the MODEM switching means 2. Moreover, the line switching controller interface section 4 is provided with a reception processing section 4-1, a transmission processing section 4-2 and a switching control section 6 and it is provided with an alarm processing switching logic section 6-1 controlling a reception side unipolar stage switch and a receiver side bipolar stage switch, a display section displaying the alarm state and a display operation section 6-2 operated manually by the operator in the case of the 1:1 route standby system. Thus, the line switching control section is provided in the case of 1:1 route standby system and the line switching control is attained by using the line switching controller.

Description

[Detailed Description of the Invention] [Table of Contents] Overview Industrial Field of Application Prior Art (Figures 6 to 9) Means for Solving the Problems to be Solved by the Invention (Figure 1) Working Examples (Figures 2 to 5) Effects of the invention [Summary] Regarding the line switching control system, when used in an l-to-1 route backup wireless line, 1 = can switch between the working line and the protection line without using a line switching control device. In the case of an N (N is an integer of 2 or more) to 1 route backup wireless line with an additional working line, the current line is the same as before; ;=In a route protection wireless line, a backup line is provided and these are switched and used depending on the line condition;=modulation/demodulation/switching means for the working line;=receiving processing means, transmission processing means, and switching means for the working line in response to an alarm. An alarm processing switching logic means is provided to switch and control the line and protection line.1-to-1 route protection methodIn the case of a wireless line, it is possible to switch between the working line and the protection line, and N (N is an integer of 2 or more) to 1 route. In the case of a backup wireless line, a line switching control means can be installed.

[Industrial application field]

The present invention relates to a line switching control system, and particularly relates to a line switching control system for a route protection wireless line; In the example, a backup line PL is prepared for Lo"La (4 lines in the example), and when a failure occurs in the working line, for example L1, the transmitting side switch TSW1 and the receiving side univollar stage switch URSWI, or the receiving side bibolar stage switch BR8W1 are controlled. The configuration is such that the backup line PL is used for the faulty line.In order to switch the line, the line switching control device A,
B was established and was in charge of relief efforts by switching failed working lines to backup lines.

The Kono line switching control device is CCI R (In
international l{adio (：onsu
For example, IIG has 12 channels at 140 Mb/s, 6
Since G has 8 channels, etc., the line switching control device used for 11G is 1 working line and 1 backup line (11 to 1).
The line switching control device used for 8G will control line switching for a total of 8 lines, 7 working lines and 1 protection line (7:1). .

For this reason, as shown in FIG.
It is necessary to include an alarm processing section 21, a display operation section 22, a switching logic section 23, a control line processing section 24, and the like.

The alarm processing unit 2112 is connected to this line switching control device 20.
A number of active transmitting/receiving circuits 21-1 to 21-N and a standby receiving circuit 21-0 are prepared, and the number of active transmitting/receiving circuits 21-1 to 21-N and standby receiving circuit 21-0 that can be connected to the switching logic unit 23 is provided. The display/operation unit 22 displays the state of the alarm transmitted from the alarm processing unit 21, and has a key operation unit that can be operated manually by the operator, and is capable of manual control {= configuration It is something that will be done.

The switching logic unit 23 determines what kind of processing should be performed based on the alarm information of each line transmitted from the alarm processing unit 2l, and determines the line number to be switched and control signals for the uni-bolar stage switch, bi-bolar stage switch, etc. , which outputs a signal to the control line.In the case of a line failure, the univola stage switch is controlled, and in the case of an equipment failure, the bibolar stage switch is controlled.

The control line processing unit 24 sends out the control information transmitted from the switching logic unit 23 to both the protection line and the working line, and receives control information from the partner station and transmits it to the switching logic unit 23. It includes a protection line control line processing section 24-0 and a working line control line processing section 24-1.

In FIG. 7, reference numeral 11 denotes a modulation/demodulation/switching device in the protection line, which has a line switching control device interface section 13 equipped with a transmission processing section 13-1. and 1
Reference numeral 2 denotes a modulation/demodulation/switching device for the working line, which includes a line switching control device interface section 14 that includes a reception processing section 14-1 and a transmission processing section 14-2.

Next (2, Fig. 8) From 2 onwards, we will explain the case in which the protection line is used for relief when a failure occurs in the route protection system in the case of one working line.

However, FIG. 8 shows only one-way lines.

(1) When the working line L is operating normally, the transmitting side switch TSW and the receiving side univollar switch UR8W
, the receiving side bibolar switch BRSW are both off. In this state, if a fault occurs in the working line Ll, as shown by the cross mark in Fig. 7 (1), alarm information ALM is input to the line switching control device B on the receiving end. is detected by the demodulation section of the modulation/demodulation/switching device 12, and sent to the alarm processing section 21 via the transmission processing section 14-2.
, is transmitted to the switching logic unit 23.

(2) At this time, the receiving end side line switching control device B confirms that the protection line PL is normal, and if it is normal and not in use, the control line (
sends parallel commands using a wireless control channel),
The sending end side line switching control device A is notified of the line number to be forwarded.

(3) The transmitting end side line switching control device outputs a paralleling command for switching and controlling the transmitting side switch TSW to the switching device. As a result, the transmitting side switch TSW of the corresponding switching device is driven to bring the transmitting end into a parallel state, and a response signal indicating that the transmitting side switch TSW has been driven is transmitted to the transmitting end line switching control device.

(4) The sending end line switching control device A transmits this response signal to the receiving end line switching control device B using the control line.

(5) As a result, the receiving end side line switching control device B:
Confirm that no alarm has been raised on the backup line PL, and send the switching device the type of alarm {= receiving side univollar stage switch drive command or receiving side bibolar stage switch driving command, and from this} The line switching control is thus completed. For example, if there is a problem in the wireless line, the reception side univola stage switch URSW is driven and if there is a device failure, the reception side bibolar stage switch BREW is driven.

Figure 9 schematically shows the entire configuration of this route backup radio line system, including the transmitting and receiving sides. Figure 9 shows an example of one working line, but of course It is possible to provide a plurality of them.Of course, the control line is wireless.

Here 1018, 10lb, 1 0 1 C't 10
1 d' is a modulation unit/switching device, 101a', 10lb
', 1010, 101d are demodulator/switching device, 102a
, 102b, 102c', 102d' are transmitters, 102
a't102b', 102CI102d' are receivers.

[Problem to be solved by the invention]

By the way, as shown in FIG. 7, the line switching control device 20 has a hardware capacity that takes into consideration the addition of working lines in response to future increases in communication volume, such as the 11:1 or 7:1 ratio, depending on the frequency used. The structure is as follows. In this case, the alarm processing unit 21 includes a current transmitter/receiver circuit 2 that takes into account future expansion.
Since 1-2 to 21-N are required, the amount of nodes becomes large. Furthermore, the switching logic unit 23 is also configured to perform logical processing corresponding to the current line, and therefore is also enormous in size. Therefore, the line switching control device must be expensive.However, in response to user demands, especially for newly installed route backup wireless lines, it is necessary to reduce the initial investment. In many cases, there is a one-to-one line configuration between active and backup lines, but even in such a case, there is a problem in that conventionally, such an expensive and large line switching control device is required.

Therefore, an object of the present invention is to enable line switching control without the use of such a line switching control device when the working and backup lines are one-to-one, thereby reducing initial investment, and reducing the need for expansion of working lines. In some cases, such a line switching control device can be used, for example, if two or more lines are currently in use,
It is an object of the present invention to provide a one-to-one route protection radio line system that can be added to a route protection radio line having one protection line.

[Means to solve the problem]

In order to achieve the above object, in the present invention, when a one-to-one route protection method is used, in which a route protection wireless line system is configured with one working line and one protection line, the sending end switch T8W is always turned on. do.

As a result, the transmission signal is output on both the working line and the protection line.The receiving end side is configured to select between the working line and the protection line.For this reason, in the present invention, as shown in Figs. As shown in FIG. An interface section 4 is provided.The line switching control device interface section 3 is provided with a transmission processing section 3-1, and the line switching control device interface section 4ζ2 includes a reception processing section 4-1 and a transmission processing section 4-2. and a switching control section 6.

This switching control unit 6 includes an alarm processing switching logic unit 6-1 that controls the receiving side unipolar stage switch and the receiving side bibolar stage switch in the case of the one-to-one route backup system, a display unit that displays the alarm status, and an operator A display ●operation section 6-2 is provided which has an operation section that can be operated manually.

[Effect]

In the present invention, when using the one-to-one route backup method, the transmitting side switch TSW is always on. Therefore, it is not necessary to control the transmitting side. It is sufficient to control the step switch URSW and the receiving side bivore step switch BRSW. Therefore, the alarm processing switching logic unit 6-1 provided in the modulation/demodulation switching device 2 receives the alarm signal of the working line and the alarm signal of the protection line via the transmission processing unit 3-1 and reception processing unit 4-1. Signals are input, and in response to these, the receiving side uniborary stage switch URSW and the receiving side bibolar stage switch B are activated.
This will control REW.

In addition, when using the N-to-1 (N is 2 or more) route backup method instead of the 1-to-1 route backup method, the second method is the same as the conventional method (2. As shown in FIG. 6, the line switching control device 20 is In other words, alarm information on the protection line is transmitted to the line switching control device 20 via the reception processing unit 4-1, and alarm information on the working line is transmitted via the transmission processing unit 4-2. Then, control can be performed in the same way as before.

In this way, in the present invention, in the case of the one-to-one route protection method, line switching control can be performed without using a line switching control device, and in the case of the N-to-one route protection method, it is possible to perform line switching control as in the conventional method. Line switching control can be performed using a line switching control device.

〔Example〕

An embodiment of the present invention will be described based on FIGS. 2 to 4.

Figure 2 shows the configuration of an embodiment of the present invention, #(4) is a diagram of its configuration, and (B) is an explanatory diagram of its operation. Figure 3 is a detailed diagram of the alarm processing switching logic section, and Figure 4. is an explanatory diagram of the operating state of the priority processing circuit. 〇 Figure 2 shows the equipment structure on the receiving end side of the wireless line. In the same figure, the same symbols as in Figure 1 indicate the same parts, and is a selector.

This selector 6-3 outputs either the switching control signal output from the alarm processing switching logic section 6-1 or the information output from the reception processing section 4-1. and 1
A line switching control device that outputs a switching control signal from the alarm processing switching logic section 6-1 in the case of the pair-to-one route backup method, and outputs the switching control signal from the reception processing section 4-1 in the case of the N-to-one route backup method. Ol controlled to output information from
In the case of the one-to-one route protection system, the alarm information on the protection line is transmitted through modulation and demodulation of the protection line, modulation and demodulation of the transmission processing unit 3-1 of the switching device 1, and modulation and demodulation of the working line, as shown in FIG. 2 (4). The alarm processing switching logic unit 6-l} is input via the reception processing unit 4-1 of the alarm processing unit 4-1. In addition, alarm information and responses of the working line are directly processed by the alarm ●Switching logic unit 6-1
0 Alarm processing ●Switching logic unit 6-1 compares the alarms of both lines, determines whether the condition of the protection line or the working line is better, and issues a switching command if the working line is better. Without putting it out (
(If the protection line has been switched, turn off the command) Select the working line, and vice versa. If the protection line is better, issue a switching command (if the protection line has been switched, keep the current status) to the protection line. choose the one.

If the status of the working line and protection line are the same (both have no alarms or alarms of the same level), either the working line is selected or the current status is maintained depending on the settings.

In the case of the one-to-one route backup method, selector 6
-3 outputs a signal from the alarm processing switching logic unit 6-1, so that the line switching control as described above is performed.

According to Figure 2 (6), in the case of the 1-to-l route backup method (=
The line switching state will be explained below. FIG. 2(B) shows a one-way wireless line using the one-to-one route backup system. Then, on the sending end side, a sending parallel command is always sent, and the sending side switch TSW is always turned on.

(1) For both the working line and the protection line, as shown in Figure 2 @(1), in a state where there is no alarm, that is, in a normal state, if priority is given to the working line L, the working line L will be selected. If there is no localization, that is, there is no priority, the protection line PL side may be selected depending on the history of the previous state.

(2) As shown in Figure 2 (B) (2), if an alarm occurs due to a factor on the transmission path of the working line L,
This alarm information is input to the alarm processing switching logic unit 6-1 of the modulation/demodulation switching device 2, a receiving side unipolar stage switch UR8W drive command is sent, and the unipolar stage selects the protection line PL. At this time, as mentioned above, the transmitting side switch TOW is always on, and the working line L and protection line PL are constantly connected, so as in the conventional case,
There is no need to send a parallel command to the sending end. Therefore, since a control line processing section is not required, the switching logic section 6-1 is simple enough to be incorporated into the modulation/demodulation/switching device 2.

(3) In addition, as shown in Figure 2 (5) and (3), when an alarm occurs on the working line due to factors such as equipment failure, the bibolar stage switch BRSW goes through the same sequence as in (2) above and connects the backup line to the standby line. PL side is selected 0 (4) And as shown in Figure 2 (B) (4), when an alarm occurs on the protection line PL side, it does not matter if the working line has priority. , if the protection line side is selected in the non-orientation state, the corresponding switch OFF command is output from the alarm processing switching logic section 6-1, and the working line side is selected.

(5) Furthermore, as shown in Figure 2 @(5), when an alarm occurs on both the working line and the protection line, the alarm processing switching logic unit 6-1 changes the degree of alarm on both lines. It compares and selects the one with better quality. In addition, in the case of alarms of the same level, if the working line has priority, the working line is selected, and if there is no location, the previous state is maintained.By the way, the alarm processing switching logic in Figure 2 (4) The details of the section 6-1 are shown in FIG.

The alarm processing switching logic section 6-1 is an alarm processing section 6-1.
1-1, priority processing circuit 6-1-2, response processing circuit 6-1
Equipped with -3 grade.

The alarm processing unit 6-1-1 automatically selects the receiving end switch, that is, the receiving side uniborary stage switch URSW, and the receiving side uniborary stage switch URSW based on the protection line alarm information from the reception processing unit 4-1 and the working line alarm information from its own device. It generates a control command for the bibolar stage switch BRSW. For example, when the priority of the alarm item is CHALM<FLoss<BOUT<power cut, the output of this alarm processing unit 6-1-1 is given to the current priority and non-localization. This results in what is shown in Figure 4, (B) (2).

Here, CHALM (line alarm) indicates that the bit error rate of the line has become larger than the specified value, for example 10-5, and this is due to the aging phenomenon on the wireless transmission path or the deterioration of the wireless equipment, and switching is not possible. Performs synchronous switching (no momentary interruption) using a univola stage switch.

FLOS8 (frame loss) is an out-of-frame synchronization caused by a rapid fading phenomenon or deterioration of wireless equipment, and switching is performed using a unipolar stage switch, similar to CH ALM.

B OUT is a bipolar output down, and other than the sending end input cutoff, the cause is a device failure in the switching device, and the switching is a system switch using a bipolar stage switch (with instantaneous interruption).
Execute.

Here, the univola stage switch is constituted by a high-speed non-contact switch such as a semiconductor switch, and the bibolar stage switch is constituted by a mechanical switch such as an electromagnetic relay.

Further, in FIG. 4, "1" indicates that the switching signal is not output.

The priority processing circuit 6-1-2 performs priority processing between the automatic switching command from the alarm processing section 6-1-1 and the manual switching command from the display/operation section 6-2.

When automatic switching is prioritized, the automatic switching command from the alarm processing unit 6-1-1 is output with priority, and when manual switching is prioritized,
The manual switching command from the display/operation unit 6-2 is output preferentially.

The response processing circuit 6-1-3 is connected to the priority processing circuit 6-1-.
When a switching command is sent from 2 to the univola stage switch or the bivola stage switch, the timer is started, and if there is a response to drive the switch within a certain period of time, a message to that effect, that is, "ANS OKJ" is displayed.
Output to the operation unit 6-2.

Furthermore, if there is no response within a certain period of time, a message to that effect, ie, "NG" is similarly output to the display/operation unit 6-2.

In addition, as shown in FIG. 3 (=, display/operation section 6-2
outputs the automatic/manual priority instruction signal that instructs the priority processing circuit 6-1-2 to operate with automatic priority or manual priority, and outputs the "manual U CONTJ" that manually controls the uni-bolar stage switch. It also outputs "manual B CONjJ" for manually controlling the bivot stage switch, and displays depending on the presence or absence of each switch drive response transmitted from the response processing circuit 6-1-2.

In addition, in the above-mentioned present invention, an outline of the operation when adding a line will be explained with reference to FIG.

In the case of a one-to-one route backup system with one working line and one protection line, as shown in Figure 5, modulation/demodulation switching devices may be provided on both the sending and receiving ends, respectively. This one
In the case of the pair-to-one route backup system, line switching control devices are not required on both the sending and receiving ends.

However, as shown in FIG. 5(b), when the number of working lines is increased to two or more, line switching control devices A and B may be provided at the sending end and receiving end, respectively, as usual. FIG. 5(b) shows an example of a 2:1 arrangement in which the working line is 2 lines, ``1 e L2, and the protection line is PL1 line, in the case of Q.

The switching sequence for the 1,000 units currently in use during this expansion is the same as in the conventional case. This will be explained using FIG. 5 (Q).

(1) The line switching control device B on the receiving end side recognizes that a fault has occurred in the working line Ll by detecting the alarm ALM.

(2) The line switching control device B on the receiving end sends a parallelization command including the line number of the working line L1 where the failure has occurred to the line switching control device A on the sending end.

(3) The line switching control device A on the sending end side receives the parallel transmission command.

(4) The line switching control device A on the sending end side recognizes from this received signal that a fault has occurred in the working line L1, and sends a switching command to the sending end switch X.

(5) This drives the sending end switch X.

(6) By driving this sending end switch X,
The line switching control device A on the sending end side receives the sending end switch X switching completion response signal.

(7) As a result, the line switching control device A on the sending end side sends a switching command for the receiving end switch X' to control the switching of the receiving end switch X' to the receiving end side line switching control device B.

(8) The line switching control device B on the receiving end side receives this reception switch X' switching command.

(9) The line switching control device B on the receiving end side sends a switching command to the receiving end switch X' based on this received signal.

(lI) This drives the receiving end switch X'.

αυ As the receiving end switch X' is driven, the line switching control device B on the receiving end side receives the receiving end switch X' switching completion response signal.

In this way, the switching from the failed working line L1 to the protection line PL is completed.

〔Effect of the invention〕

As described above, according to the present invention, line switching of a one-to-one route backup wireless line can be controlled by incorporating a simple circuit into the modulation/demodulation switching apparatus instead of using a line switching control apparatus. In addition, if the position is not fixed, errors that occur when switching back can be minimized, which is more advantageous than one-to-one route backup wireless line switching using a line switching control device.

Furthermore, even if the number of lines in use is increased in the future and switching control is replaced by N-to-1 switching control using a line switching control device, there is no need to make any changes to the existing hardware, and line control will be possible just by changing the cable connection. .

In this way, it is possible to introduce a one-to-one route backup wireless line system for new lines without installing a line switching control device, and as a result, the initial investment can be kept to a minimum, which is why recent users are It becomes possible to provide a route backup wireless line that meets the demand.

[Brief explanation of drawings]

Fig. 1 is a diagram explaining the principle of the present invention, Fig. 2 (4) is a diagram of an embodiment of the present invention, Fig. 2 (5)
is an explanatory diagram of the operation of the present invention, FIG. 3 is a detailed diagram of the alarm processing switching logic section, FIG. 4 is an explanatory diagram of the output state of the alarm processing section, FIG. FIG. 7 is an explanatory diagram of a conventional route backup wireless line, FIG. 8 is an explanatory diagram of the operation of the conventional example, and FIG. 9 is a configuration diagram of a route backup wireless line system. DESCRIPTION OF SYMBOLS 1...Modulation/demodulation/switching device on the protection side, 2...Modulation/demodulation/switching device on the working side, 3...Line switching control device interface unit, 4...
Line switching control device interface section, 6... switching control section.

Claims (1)

[Scope of Claims] In a route protection radio line in which a protection line is provided for a working line and these are switched and used depending on the state of the line, the modulation/demodulation/switching means (2) for the working line includes a receiving processing means (4- 1), a transmission processing means (4-2), and an alarm processing switching logic means (6-1) for controlling switching between the working line and the protection line in response to an alarm, and in the case of a one-to-one route protection wireless line. 1. A line switching control system that enables switching between a working line and a protection line, and in the case of an N (N is an integer of 2 or more) to one route protection wireless line, it is possible to install a line switching control means.