JP3758820B2 - Selector and selection device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a device for switching transmission lines in a device system or the like having a redundant configuration.
[0002]
[Prior art]
As an apparatus for switching between an active transmission line and a standby transmission line, for example, an “N / 1 redundant configuration circuit” described in Japanese Patent Laid-Open No. 4-290025 is known. In this apparatus, the redundant system selection unit provided on the reception side and the redundant system branching unit provided on the transmission side have separate hardware structures.
[0003]
Conventionally, a redundant system selection unit having a structure specialized for 1: N redundant system switching, where the number of standby transmission lines is 1 and the number of active transmission lines is N, is redundant. This was realized by the system branching section. However, in the redundant system selection unit and the redundant system branch unit specialized for 1: N redundant system switching, it is possible to cope with the number of N or less active transmission lines by not using some of the active transmission lines. Is possible.
[0004]
[Problems to be solved by the invention]
In the apparatus described in Japanese Patent Laid-Open No. 4-290025, different hardware must be prepared for the receiving side redundant system selection unit and the transmission side redundant system branching unit.
[0005]
Further, a redundant system selection unit and redundant system branching unit specialized for a specific number N of active transmission lines cannot cope with the number of active transmission lines exceeding N. In addition, the technique of dealing with the number of working transmission lines less than N by not using some working transmission lines reduces the use efficiency of the redundant selection unit and the redundant branching unit.
[0006]
Accordingly, an object of the present invention is to provide a basic component that can constitute both a receiving-side redundant system selecting unit and a transmitting-side redundant system branching unit by a single or a plurality of combinations.
[0007]
It is another object of the present invention to cope with 1: 1 redundancy system switching to 1: N redundancy system switching in a redundant system selection unit and redundant system branching unit without significantly reducing the use efficiency.
[0008]
It is another object of the present invention to provide a redundant system selection unit and a redundant system branch unit having a structure that can be easily expanded in accordance with an increase in the number N of active transmission lines.
[0009]
[Means for Solving the Problems]
To achieve the above object, the present invention provides:
A plurality of transmission input routes, one connection input route, the same number of transmission output routes as the transmission input route, one connection output route,
Two three inputs each having two transmission input routes and a first internal route as inputs, each having a different transmission output route as an output. A set of one-output selectors;
A protection selector having the plurality of transmission input routes as inputs and the connection output route as an output;
An internal / external protection selector having the connection input route and the second internal route branched from the connection output route as inputs and the first internal route as an output is provided. Provide a selector.
[0010]
According to the selector having such a configuration, for example, when it is assumed that the number of input routes for transmission is four, the paths passing through the first internal route and the second internal route are used as necessary. Thus, information from any of the four transmission input routes can be output to any transmission output route of the four transmission output routes.
[0011]
This indicates that two systems of 1: 1 redundancy system, one system of 1: 2 redundancy system selection unit, and branching unit can be configured. In this case, when used in a 1: 1 redundant system, it can be used as two systems, so its usage efficiency does not decrease.
[0012]
Further, by connecting such a selector in two stages, an output path for connection of the selector in the preceding stage and an input path for connection of the selector in the subsequent stage, the selectors of both selectors can be connected as necessary. By using the path passing through the 1 internal route and the 2nd internal route, information from any of the 8 transmission input routes can be obtained from the 8 transmission output routes. It can be output to any of the transmission output paths.
[0013]
This means that it is possible to configure four systems of 1: 1 redundancy systems, two systems of 1: 2 redundancy systems, one system of 1: 3, and 1: 4 redundancy system selection units and branching units. Show. In this case as well, the number of systems can be increased with a decrease in N of the 1: N redundant system, so that the use efficiency is hardly reduced.
[0014]
Further, if the protection selector of the selector is configured so that the connection input route is an input and the connection output route is an output in addition to the plurality of transmission input routes, three stages are provided. The above selectors can be connected and used by connecting the output path for connection of the selector in the previous stage and the input path for connection of the selector in the subsequent stage.
[0015]
In this way, it is possible to increase the configuration (N types) of 1: N redundant systems that can be handled. Of course, in this case as well, the same effect as that of the two-stage case described above can be obtained.
[0016]
As described above, both the branching unit and the selecting unit can be configured by using the selector according to the present invention, and from the 1: 1 redundant system switching to the 1: N redundant system switching, without significantly reducing the use efficiency. Can respond. Alternatively, the expansion according to the increase in the number N of active transmission lines can be easily performed by sequentially connecting a plurality of selectors.
[0017]
It should be noted that the same function can be achieved by providing a selector that inputs all the transmission input routes for each transmission route output route, but such a configuration has a number of transmission route output routes. This is not realistic because the hardware scale is remarkably increased with the increase in the number of transmission path output paths.
[0018]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described.
[0019]
First, FIG. 1 shows the configuration of an information system to which the selection device according to this embodiment is applied.
[0020]
In the drawing, between the branching unit 1000 and the selection unit 2000, one or a plurality of active transmission lines and one standby transmission line are provided. The branching unit 1000 transmits the data input from the information device 3000 on the branching unit side to the selection unit 2000 using the working transmission line. The selection unit 2000 sends the data received from the working transmission line to the information device 4000 on the selection unit side. In such a configuration, when a failure occurs in one active transmission line, the branching unit 1000 transmits information to the selection unit 2000 using a backup transmission line instead of the active transmission line in which the failure has occurred. . The selection unit 2000 sends the data received from the standby transmission line instead of the active transmission line in which the failure has occurred to the information device 4000 on the selection unit side.
[0021]
In the present embodiment, such a branching unit and selecting unit are configured by a combination of basic components shown in FIG.
[0022]
2 can be roughly divided into five functional blocks.
[0023]
The redundant selector unit 101 which is the first functional block includes 3-input 1-output selectors 111 to 114 corresponding to the output routes 131 to 134, respectively. The 3-input 1-output selectors 111 and 112 share the input routes 141 and 142 and the route 145, respectively. The 3-input 1-output selectors 113 and 114 share the input routes 143 and 144 and the routes. The path 145 is used as an input.
[0024]
The second functional block is a protection selection unit 102, and five arbitrary input routes 141 to 145 for one output route 135 by a protection selector 115 which is a 2 × 2 + 1 = 5 input 1 output selector. A desired one is selected and output. In addition, the output path 135 is divided into two branches in the previous stage output from the basic component 100. The branch to the inside of the basic component 100 is an internal protection path 137, and the branch to the outside is an external protection output path 136. It becomes.
[0025]
The internal / external protection selector 103 that is the third functional block includes a 2-input / 1-output selector 116 corresponding to the output route 145, and includes an external protection input path 146 and an internal protection path 13. 7 One of them is selected and output to the output route 145. This output becomes one input of each three-input one-output selector of the redundant selector unit 101.
[0026]
The fourth functional block is the input unit 104, the input routes 141 to 144, External protection input path 146 with a total of five input paths.
[0027]
The fifth functional block is the output unit 105, the outputs 131 to 134 after selection by the three-input one-output selector, and the output route 13 that is the external protection output path 135. 6 A total of five output routes.
[0028]
Here, when a plurality of basic components 100 are used in combination, the external protection output path 13 is used. 6 The output route 135 is connected to the external protection input path 146 of other basic components.
[0029]
In the basic component 100 having such a configuration, the input route 141 from each of the three-input one-output selectors 111 to 114 ~ 144, external protection input path Data input from any one of the routes 146 can be output. That is, data from the directly connected input route can be output by selecting the route in the 3-input 1-output selectors 111 to 114, and is not directly connected. External protection input path The data from 146 is received by the 2-input 1-output selector 116. External protection input path 146 and the three-input one-output selectors 111 to 114 can select the output route 145 of the two-input one-output selector 116 to output the signal. ~ 144, external protection input path Data from an input route that is not directly connected out of 146 is selected by the protection selector 115, the internal protection path 137 from the selector 115 is selected by the 2-input 1-output selector 116, and 3-input 1 In the output selectors 111 to 114, the output can be output by selecting the output path 145 of the selector 116.
[0030]
Hereinafter, the selection unit and the branch unit configured by combining such basic components will be described.
[0031]
First, the branch part will be described.
[0032]
FIG. 3 shows a branching section formed by connecting two basic parts shown in FIG. 2 00 is shown.
[0033]
This configuration corresponds to the switching from 1: 1 redundant system switching to 1: 4 redundant system switching.
[0034]
As shown, this configuration is a basic part 2 02 external protection output path 2 81, another basic part 2 01 external protection input path 2 55 is connected. In the figure, 2 Reference numeral 05 denotes a control unit that controls the operation of each selector. Although not shown, the control unit 05 has a connection line to each selector, and the selection operation of the selector, as described later, Controls the delay time in the selector.
[0035]
Hereinafter, each switching operation from 1: 1 redundant system switching to 1: 4 redundant system switching will be described.
[0036]
First, the 1: 1 redundant system switching will be described. In this case, the branching section shown in FIG. 2 00 functions as a branching unit of four 1: 1 redundant systems.
[0037]
In this case, the input route 2 51, 2 53, 2 56, 2 58 are the four data input routes from the first to the fourth, that is, the four data input routes from the information device 3000 in FIG. Input route 2 52, 2 54, 2 57, 2 59 is not used.
[0038]
Also, the working transmission line of the first system is the output route 2 31. The standby transmission line is the output route. 2 32, the working transmission line of the second system is the output route 2 33, backup transmission line is output route 2 No. 34, the working transmission line of the third system is the output route 2 41, backup transmission line is output route 2 42, the working transmission line of the fourth system is the output route 2 43, backup transmission line is output route 2 44.
[0039]
In such a form, normally, a three-input one-output selector connected to the working transmission line in each system 2 11 / 2 13 / 2 21 / 2 23 are each input routes 2 51 / 2 53 / 2 56 / 2 58 is selected and output. In a system where a failure has occurred in the active transmission line, a 3-input 1-output selector connected to the standby transmission line 2 12 / 2 14 / 2 22 / 2 24 is the input route 2 51 / 2 53 / 2 56 / 2 58 is selected and output.
[0040]
As a result, the input route 2 51 for output route 2 31, 2 To 32, input route 2 53 for output 2 33, 2 34, input route 2 56 for output route 2 41, 2 42, input route 2 58 for output 2 43, 2 A total of four branches of 1: 1 redundancy switching can be realized.
[0041]
Next, 1: 2 redundant system switching will be described. In this case, the branching section shown in FIG. 2 00 functions as a branching unit of two 1: 2 redundant systems.
[0042]
In this case, the input route 2 51, 2 53 is an input route for data of the first system, and the input route 2 56 and 2 58 is an input path for two data of the second system. Also, the two active transmission lines of the first system are output routes 2 31 and 2 33, backup transmission line is output route 2 32, the working transmission line of the second system is the output route 2 41 and 2 43, backup transmission line is output route 2 42.
[0043]
In such a form, normally, a three-input one-output selector connected to the working transmission line in each system 2 11 / 2 13 / 2 21 / 2 23 are each input routes 2 51 / 2 53 / 2 56 / 2 58 is selected and output.
[0044]
On the other hand, for example, in the first system, the working transmission line 2 When a failure occurs in 33, the standby transmission line is as follows. 2 32, working transmission line 2 Input route that was output to 33 2 Data from 53 is output.
[0045]
Protection selector 2 15 is an input route 2 Select the input from 53, output route 2 To 35. Internal / external protection selector 2 16 is internal protection path 2 Select input from 72, output route 2 To 36. And 3 input 1 output selector 2 12, input route 2 Select 36, output route 2 To 32.
[0046]
In the first system, the working transmission line 2 3-input 1-output selector in case of failure 2 12 is the input route 2 By selecting and outputting 51 data, the standby transmission line 2 32, working transmission line 2 Input route output to 31 2 Data from 51 is output.
[0047]
Thereby, 1: 2 redundant system switching of the first system can be realized.
[0048]
Similarly, for the second system, a branch of 1: 2 redundancy switching can be realized.
[0049]
As can be understood from the above description, the basic components shown in FIG. 2 can independently constitute a branching unit corresponding to two systems of 1: 1 redundant system switching and one system of 1: 2 redundant system switching. .
[0050]
Next, 1: 3 redundant system switching will be described.
[0051]
In this case, the branching section shown in FIG. 2 00 functions as a branching part of one system of 1: 3 redundancy system.
[0052]
In this case, the input route 2 51, 2 53, 2 56 is a data input route. The three working transmission lines are output routes. 2 31 and 2 33 and 2 41, backup transmission line is output route 2 32.
[0053]
In such a form, normally, a 3-input 1-output selector connected to the working transmission line. 2 11 / 2 13 / 2 21 is the input route 2 51 / 2 53 / 2 56 is selected and output.
[0054]
Next, due to a failure, etc., the working transmission line 2 31, 2 Instead of any of 33, a backup transmission line 2 When 32 is used, the input route is the same as in the case of the 1: 2 redundant system switching described above. 2 51 or 2 Output data from 53 2 32.
[0055]
On the other hand, working transmission line 2 Instead of 41, a backup transmission line 2 The operation when 32 is used is as follows.
[0056]
Protection selector 2 25 is an input route 2 Select input from 56, output route 2 Output to 45. Inside and outside protection selector 2 16 for external protection input path 2 Select input from 55, output route 2 To 36. And 3 input 1 output selector 2 12, input route 2 Select 36, output route 2 To 32.
[0057]
Thereby, the branch of 1: 3 redundant system switching is realizable.
[0058]
Next, 1: 4 redundant system switching will be described.
[0059]
In this case, in this case, the branching section shown in FIG. 2 00 functions as a branching part of one system of 1: 4 redundancy system.
[0060]
In this case, the input route 2 51, 2 53, 2 56, 2 58 is a data input route. The four working transmission lines are output routes. 2 31 and 2 33 and 2 41 And 243 The standby transmission line is the output route 2 32.
[0061]
In such a form, normally, a 3-input 1-output selector connected to the working transmission line. 2 11 / 2 13 / 2 21 / 22 3 is the input route 2 51 / 2 53 / 2 56 / 2 58 is selected and output.
[0062]
Next, due to a failure, etc., the working transmission line 2 31, 2 Instead of any of 33, a backup transmission line 2 When 32 is used, the input route is the same as in the case of the 1: 2 redundant system switching described above. 2 51 or 2 Output data from 53 2 32.
[0063]
On the other hand, working transmission line 2 41 or 2 Instead of 43, a backup transmission line 2 The operation when 32 is used is as follows.
[0064]
Protection selector 2 25 is an active transmission line 2 A backup transmission line instead of 41 2 Input route when using 32 2 Select 56 to output route 2 45 to the working transmission line 2 Standby system transmission line instead of 43 2 Input route when using 32 2 Select 58 and output route 2 Output to 45. Inside and outside protection selector 2 16 for external protection input path 2 Select input from 55, output route 2 To 36. And 3 input 1 output selector 2 12, input route 2 Select 36, output route 2 To 32.
[0065]
Thereby, the branch of 1: 4 redundant system switching is realizable.
[0066]
In the above, the branch part comprised combining the basic components was demonstrated.
[0067]
Hereinafter, the selection unit will be described.
[0068]
FIG. 4 shows a selection unit configured by connecting two basic components shown in FIG. 3 00 is shown.
[0069]
This configuration corresponds to the switching from 1: 1 redundant system switching to 1: 4 redundant system switching.
[0070]
As shown, this configuration is a basic part 3 01 external protection output path 3 71, another basic part 3 02 external protection input path 3 60 is connected. As can be seen from the figure, this configuration consists of two basic components of The connection relationship is the same as that shown in FIG. That is, FIG. 4 relates to the relationship between the two basic components, and the two basic components of FIG. 2 01, 2 This coincides with the upside down of the figure of 02. Also figure 4 During, 3 Reference numeral 05 denotes a control unit that controls the operation of each selector. Although not shown, the control unit 05 has a connection line to each selector, and the selection operation of the selector, as described later, Controls the delay time in the selector.
[0071]
Hereinafter, each switching operation from 1: 1 redundant system switching to 1: 4 redundant system switching will be described.
[0072]
First, the 1: 1 redundant system switching will be described.
[0073]
In this case, the selection unit shown in FIG. 3 00 functions as a selection unit for four 1: 1 redundant systems.
[0074]
In this case, the input route 3 51, 3 53, 3 56, 3 58 are the four working transmission lines from the first to the fourth, respectively, and the input route 3 52, 3 54, 3 57, 3 59 are four standby transmission lines from first to fourth.
[0075]
Also, the output of the first system, that is, for example, the output path to the output device 4000 in FIG. 1 is the output path 331, the output of the second system is the output path 333, the output of the third system is the output path 341, The outputs of the four systems are output routes 343.
[0076]
In such a form, normally, in each system, a three-input one-output selector 3 11 / 3 13 / 3 21 / 3 Each of the input routes 23 is an active transmission line 3 51 / 3 53 / 3 56 / 3 58 is selected and output. Also, in systems where a failure has occurred in the working transmission line, a 3-input 1-output selector 3 11 / 3 13 / 3 21 / 3 Reference numeral 23 denotes an input route 35 which is a standby transmission line. 2 / 35 4 / 3 57 / 3 59 is selected and output.
[0077]
As a result, a total of four branches of 1: 1 redundant system switching can be realized.
[0078]
Next, 1: 2 redundant system switching will be described.
[0079]
this In the case of FIG. The selection unit 300 shown in FIG. 3 functions as a selection unit for two systems of 1: 2 redundancy.
[0080]
In this case, the input route 3 51, 3 53 becomes the working transmission line of the first system, and the input route 3 56 and 3 Reference numeral 58 denotes a second-system working transmission line. The first transmission line is the input route 3 52nd 2 The standby transmission line of the system is the input route 3 57. Also, the two output paths of the first system are output paths 3 31 and 3 33, the output path of the second system is the output path 3 41 and 3 43.
[0081]
In such a form, normally, in each system, a three-input one-output selector 3 11 / 3 13 / 3 21 / 3 23 select and output the input routes 351/353/356/358, respectively.
[0082]
On the other hand, for example, in the first system, the working transmission line 3 3-input 1-output selector in case of failure in 51 3 11 is the input route 3 Select 52 and output route 3 By outputting to 31, the backup transmission line 3 Output data from 52 3 To 31.
[0083]
On the other hand, working transmission line 3 When a failure occurs in 53, the standby transmission line is as follows. 3 Output data from 52 3 To 33.
[0084]
Protection selector 3 15 is an input route 3 Select the input from 52, output route 3 To 35. Internal / external protection selector 3 16 is internal protection path 3 Select input from 72, output route 3 To 36. And 3 input 1 output selector 3 In 13, the input route 3 Select 36, output route 3 To 33.
[0085]
Thereby, 1: 2 redundant system switching of the first system can be realized.
[0086]
Similarly, the selection of 1: 2 redundant system switching can be realized for the second system.
[0087]
As can be understood from the above description, the basic components shown in FIG. 2 can independently constitute a selection unit corresponding to two systems of 1: 1 redundant system switching and one system of 1: 2 redundant system switching. .
[0088]
Next, 1: 3 redundant system switching will be described.
[0089]
In this case, the selection unit 300 illustrated in FIG. 4 functions as a single 1: 3 redundant selection unit.
[0090]
In this case, the input route 3 51, 3 53, 3 56 is used as the working transmission line, the input route 3 52 is used as a backup transmission line. Also, output route 3 31, 3 33, 3 41 is used as an output path.
[0091]
In such a form, normally, a 3-input 1-output selector connected to the working transmission line. 3 11 / 3 13 / 3 21 is the input route 3 51 / 3 53 / 3 56 is selected and output.
[0092]
Next, due to a failure, etc., the working transmission line 3 51, 3 Instead of any one of 53, a backup transmission line 3 When 52 is used, the input route is the same as in the case of the 1: 2 redundancy switching described above. 3 Output data from 52 3 31 or 3 To 33.
[0093]
On the other hand, working transmission line 3 Instead of 56, a backup transmission line 3 The operation when 52 is used is as follows.
[0094]
Protection selector 3 15 is an input route 3 Select the input from 52, output route 3 To 35. Inside and outside protection selector 3 26, external protection input path 3 Select input from 60, output route 3 Output to 46. And 3 input 1 output selector 3 In 21, the input route 3 Select 46, output route 3 41 is output.
[0095]
Thereby, 1: 3 redundant system switching can be realized.
[0096]
Next, 1: 4 redundancy switching will be described.
[0097]
In this case, the input route 3 51, 3 53, 3 56, 3 58 is used as the working transmission line, the input route 3 52 is used as a backup transmission line. Also, output route 3 31, 3 33, 3 41, 3 43 is used as an output path.
[0098]
In such a form, normally, a 3-input 1-output selector connected to the working transmission line. 3 11 / 3 13 / 3 21 / 3 23 are each input routes 3 51 / 3 53 / 3 56 / 3 58 is selected and output.
[0099]
Next, due to a failure, etc., the working transmission line 3 51, 3 Instead of any one of 53, a backup transmission line 3 When 52 is used, the input route is the same as in the case of the 1: 2 redundancy switching described above. 3 Output data from 52 3 31 or 3 To 33.
[0100]
On the other hand, working transmission line 3 56 or working transmission line 3 Instead of any one of 58, a standby transmission line 3 The operation when 52 is used is as follows.
[0101]
Protection selector 3 15 is an input route 3 Select the input from 52, output route 3 To 35. Inside and outside protection selector 3 26, external protection input path 3 Select input from 60, output route 3 Output to 46. And Present System transmission line 3 Instead of 56, a backup transmission line 3 When using 52, 3 input 1 output selector 3 21 is the input route 3 Select 46, output route 3 41 is output. Also, working transmission line 3 Instead of 58, a backup transmission line 3 When using 52, 3 input 1 output selector 3 23 is the input route 3 Select 46, output route 3 Output to 43.
[0102]
Thus, 1: 4 redundant system switching is realized.
[0103]
Above figure 2 The branching unit and the selection unit using the basic parts are described.
[0104]
Hereinafter, the internal configuration of each 3-input 1-output selector of the redundant selector unit 101 will be described.
[0105]
FIG. 5 shows the configuration of each 3-input 1-output selector.
[0106]
A three-input one-output selector 400 in the figure selects one of the three input routes 421 to 423 and outputs the selected one to the output route 431. Also, in correspondence with each input route, data is read from any of the three temporary memories 401 to 403 and the three temporary memories, and output to the output 431, and the control information of the read controller is provided. A read control information storage 412 is provided.
[0107]
When data instructing reading from the input route 421 and data of read timing are set in the read control information storage 412 from the control unit 205 or 305, the read control unit 411 follows the data in the temporary storage 401. Is output to the output route 431.
[0108]
Here, the delay time from the input route to the output route can be controlled by controlling the time from storing the data in the temporary storage 401 to reading it.
[0109]
Therefore, when using a standby transmission line, appropriate data is set in the read control information storage 412 of each 3-input 1-output selector, and the protection selector, internal / external protection Data delay through the selector, protection selector, internal / external protection By increasing the delay in the 3-input 1-output selector that outputs data that does not pass through the selector, the delay of each data output from the branching unit and the selecting unit can be matched even when the standby transmission line is used.
[0110]
As shown in FIG. 6, at least three or more input / output selectors 511 to 514 and a protection selector 5 1 Even if phase absorption buffers 551 to 555 are added to the subsequent stage of 5, when the data selection device basic parts output from the branching unit and the selection unit are connected in series, they are output from the previous stage and the subsequent stage. Data delay can be matched even when the standby transmission line is used.
[0111]
For example, the case where the 3-input 1-output selector of FIG. 5 is used can be described as follows.
[0112]
Now, in the configuration of the selection unit in FIG. 3 51- 3 54, 3 56 ~ 3 59, the start positions of the input data are all in the same phase 611 as shown in FIG. 3 01, 3 02, it is assumed that a fixed data delay is generated for m clocks in terms of the number of clocks of the clock 601 synchronized with the data rate after passing through each stage.
[0113]
In this case, the position of the input phase 611 on the absolute time axis 602 is φ0. Input route data is a protection selector, internal / external protection If the time required to input to the 3-input 1-output selector via the selector is m clocks, the position of this phase is φ0 + m and Become (631) .
[0114]
In this case, for example, protection selector, internal / external protection 3-input 1-output select that outputs data via selector The data is output by delaying the data for m clocks using the temporary storage (622). ) In a 3-input 1-output selector that outputs data directly received from the input route, the data is output with a delay of 2 m clock data using temporary storage. ( 621 ) By doing so, the output phase of both of them is φ0 + 2m, which coincides. Here, the delay m clock provided by the 3-input 1-output selector that outputs data via the internal / external selector is preferably the minimum delay required by the 3-input 1-output selector.
[0115]
The embodiment of the present invention has been described above.
[0116]
In the above embodiment, the redundant selector unit 101 of FIG. 2 includes two sets of two 3-input 1-output selectors corresponding to two input routes. There may be. Further, by connecting the branching unit in FIG. 3 and the selection unit in FIG. 4 with three or more basic parts in sequence, the output of the previous stage protection selector to the input of the next stage internal / external selector and protection selector You may make it comprise. The operation when three or more basic parts are used is almost the same as that when using the two basic parts described above, but the active transmission line to be switched between the standby transmission line and the standby transmission line is accommodated in different basic parts. The protection selector of the basic part that does not accommodate the active transmission line that switches between the standby transmission line and the standby transmission line when switching to the standby transmission line, continues to output the protection selector output of the previous stage as it is. Relay to the basic parts of the stage.
[0117]
In either case, this makes it possible to cope with a redundant system in which the number of working transmission lines is further increased.
[0118]
2 is provided with one set of two 3-input 1-output selectors corresponding to two input routes, and the branch unit in FIG. 3 and the selection unit in FIG. The above basic components may be configured by sequentially connecting the output of the previous stage protection selector to the input of the next stage internal / external selector and the protection selector. In this case, one basic component can only handle 1: 1 redundant system switching. However, by connecting a plurality of basic components as described above, switching to a redundant system using a plurality of working transmission lines is possible. Can also respond.
[0119]
Further, in the above embodiment, when the failure occurs in the working transmission line, the branching unit 1000 outputs information to the standby transmission line instead of the working transmission line in which the failure has occurred. Even when there is no failure in the transmission path, information input from an appropriate input path according to the purpose may be output to the standby transmission path and transmitted to the selection unit 2000. For example, in the case of 1: 1 redundant system switching, even if there is no failure in the active transmission line, if the same information as the active transmission line is output to the standby transmission line, the active system When a failure occurs in the transmission path, only the selection unit 2000 can switch the used transmission path from the active transmission path to the standby transmission path only by switching the input path.
[0120]
【The invention's effect】
As described above, according to the present invention, it is possible to provide a basic component that can constitute both a receiving-side redundant system selection unit and a transmitting-side redundant system branching unit, alone or in combination.
[0121]
In addition, in the redundant system selection unit and the redundant system branching unit, it is possible to cope from 1: 1 redundant system switching to 1: N redundant system switching without significantly reducing the use efficiency.
[0122]
Furthermore, it is possible to provide a redundant system selection unit and a redundant system branching unit having a structure that can be easily expanded according to an increase in the number N of active transmission lines.
[Brief description of the drawings]
FIG. 1 is a block diagram showing a configuration of an information system.
FIG. 2 is a block diagram showing a configuration of basic parts.
FIG. 3 is a block diagram illustrating a configuration of a branching unit.
FIG. 4 is a block diagram illustrating a configuration of a selection unit.
FIG. 5 is a block diagram showing a configuration of a 3-input 1-output selector.
FIG. 6 is a block diagram showing another configuration for delay control.
FIG. 7 is a timing chart showing the timing of delay control.
[Explanation of symbols]
100 basic parts
101 Redundant selector section
102 Protection selection part
103 Internal / external protection path selector
104 Input section
105 Output section
111-114 3-input 1-output selector
115 protection selector
116 Internal / external protection selector
131-135,145 Output route
136 External protection output path
137 Internal protection pass
141-144, 146 Input route
200 selection part
201-202 basic parts
211-214, 221-224, 3-input, 1-output selector
215, 225 Protection selector
216, 226 Internal / external protection selector
231 to 234, 236, 246, 241 to 244 Output route
235, 245 Protection path output route
255, 260 External protection input path
271,281 External protection output path
272, 282 Internal protection path
300 branch
301-302 Basic parts
311 to 314, 321 to 324 3 input 1 output selector
315, 325 Protection selector
316, 326 Internal / external protection selector
331-334, 336, 346, 341-344 Output route
335, 345 Protection path output route
355, 360 External protection input path
371, 381 External protection output path
372,382 Internal protection path

Claims (6)

Multiple input paths for transmission;
One input path for connection,
The same number of transmission output routes as the number of transmission input routes,
One output path for connection,
Two three inputs each having two transmission input routes and a first internal route as inputs, each having a different transmission output route as an output. A set of one-output selectors;
A protection selector having the plurality of transmission input routes as inputs and the connection output route as an output;
An internal / external protection selector having the connection input route and a second internal route branched from the connection output route as inputs and the first internal route as an output is provided. Selector. A selection device comprising two stages of the selector according to claim 1,
The selection input device, wherein the connection input path of the second stage selector is connected to the connection output path of the first stage selector. The selector according to claim 1, comprising:
The selector, wherein the protection selector has the connection input route as an input and the connection output route as an output in addition to the plurality of transmission input routes. A selection device comprising a plurality of selectors according to claim 3,
The selection input device, wherein the connection input path of each stage selector from the second stage to the final stage is connected to the connection output path of the preceding stage selector. The selector according to claim 1 or 3, wherein
A selector comprising delay means for delaying information to be output to the output route corresponding to each output output route. The selection device according to claim 2 or 4, comprising:
The selector of each stage is provided with a delay unit that gives a delay to information output to the output route corresponding to each transmission output route.

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