JP2000261473A - System and method for managing network path - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate management of a path without the need for a low speed interface section. SOLUTION: In a network adopting this path management system consisting of a ring network and an ADM network interconnected by a single connection device 3, the connection device 3 is provided with a selection circuit 15 that switches a signal in the unit of sections, a time division switch circuit 16 that is connected to the circuit 15 and switches a signal in the unit of paths, a path identification information registration means that registers path identification information to identify the path of the ring network and the ADM network, and a path identification information designation means that designates path identification information. The selection circuit 15 and the time division switch circuit 16 manage path switching on the basis of the path identification information designated by the path identification information designation means.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ring network and an ADM (Add Drop Multiplex).
r) A network path management system and method for managing a network path connected to a network or the like.

[0002]

2. Description of the Related Art FIG. 10 shows a conventional path management system for a network. The path management system of this network includes devices 101, 102, 1
03 and the devices 104 and 10
5 is for managing the path of the network connected to the ADM network composed of the network 5. The device 103 as a connection device for the ring network has a low-speed interface unit 106, a time-division switch circuit 107 connected thereto, and two high-speed interface units 108 and 109 connected thereto. . The device 104, which is a connection device of the ADM network, includes a low-speed interface unit 110, a time-division switch circuit 111 connected thereto, a selection circuit 112 connected thereto,
Two high-speed interface units 11 connected to this
3 and 114. The low-speed interface unit 106 of the device 103 and the low-speed interface unit 1 of the device 104
10 is connected by an external cable.

[0003]

In a conventional network path management system, a ring network and an A
Since the devices for connecting to the DM network are different, there is a problem that each requires a low-speed interface unit and the number of external cables connecting these low-speed interface units needs to be equal to the number of necessary paths.

An object of the present invention is to provide a network path management system and method which does not require a low-speed interface unit and can easily manage paths.

[0005]

In order to solve the above-mentioned problems, the invention according to claim 1 is a method for providing a ring network and an AD.
In a network in which an M network is connected by a single connection device, the connection device includes selection means for switching in section units, time-division switch means for switching in path units connected to the selection means, a ring network and an ADM network. A path identification information registering means for registering path identification information for identifying a path of the path, and a path identification information designating means for designating the path identification information, based on the path identification information designated by the path identification information designating means. The selection means and the time-division switch means manage path switching.

According to a second aspect of the present invention, there is provided a network in which a ring network and an ADM network are connected by one connection device, and an ADM network and a TRM network are connected by one connection device. Each of the devices for use has a path identification information registration unit that registers path identification information for identifying a path of a ring network, an ADM network, and a TRM network, and a path identification information designating unit that designates path identification information, The selection means and the time-division switch means manage path switching based on the path identification information designated by the path identification information designating means.

According to a third aspect of the present invention, there is provided a network in which a ring network and an ADM network are connected by one connection device, and an ADM network and a mesh network are connected by one connection device. Each of the devices for use has a path identification information registration unit that registers path identification information for identifying a path of the ring network, the ADM network, and the mesh network, and a path identification information designating unit that designates the path identification information, The selection means and the time-division switch means manage path switching based on the path identification information designated by the path identification information designating means.

According to a fourth aspect of the present invention, in a network in which a ring network and an ADM network are connected by a single connection device, the connection device includes selection means for switching in section units, and a path connected to the selection means. Time division switch means for switching to a unit, path identification information registration means for registering path identification information for identifying a path between a ring network and an ADM network,
In a network path management method for a network path management system having path identification information designating means for designating path identification information, the selection means and the time-division switch means are based on the path identification information designated by the path identification information designating means. The method includes a step of managing path switching.

According to a fifth aspect of the present invention, there is provided a network in which a ring network and an ADM network are connected by one connection device, and an ADM network and a TRM network are connected by one connection device. Each of the network devices includes a path identification information registering unit that registers path identification information for identifying a path of a ring network, an ADM network, and a TRM network; and a path identification information designating unit that designates path identification information. In a network path management method for a path management system, the method further comprises a step of managing path switching by the selection unit and the time division switch unit based on the path identification information specified by the path identification information specification unit.

According to a sixth aspect of the present invention, there is provided a network in which a ring network and an ADM network are connected by one connection device, and an ADM network and a mesh network are connected by one connection device. Each of the network devices includes a path identification information registering unit that registers path identification information for identifying a path of the ring network, the ADM network, and the mesh network, and a path identification information designating unit that designates the path identification information. In a network path management method for a path management system, the method further comprises a step of managing path switching by the selection unit and the time division switch unit based on the path identification information specified by the path identification information specification unit.

[0011]

Next, embodiments of the present invention will be described in detail with reference to the drawings. As shown in FIG. 1, a network path management system according to a first embodiment of the present invention connects a ring network composed of devices 1, 2, and 3, and an ADM network composed of devices 3, 4, to each other. It manages a network path. In the ring network, sections (transmission paths) are unified and registered to make paths redundant. In the ADM network, sections are duplicated and paths are registered in a single path.
The ring network and the ADM network form an optimal redundant configuration to improve reliability, respectively.

In FIG. 2, the device 1 has two high-speed interface units 5, 6, and a time-division switch circuit 7 connected thereto. The device 2 also has two high-speed interface units 8, 9 and a time-division switch circuit 10 connected thereto. Device 3, which is a device for connecting the ring network and the ADM network,
Four high-speed interface units 11, 12, 13, 14
And a selection circuit 15 connected to the high-speed interface units 13 and 14, and a time-division switch circuit 16 connected to the selection unit 15 and the high-speed interface units 11 and 12. The high-speed interface unit 5 is connected to the high-speed interface unit 8. The high-speed interface unit 6 is connected to the high-speed interface unit 12. The high-speed interface unit 9 is connected to the high-speed interface unit 11.

The ADM network device 4 includes two high-speed interface units 17 and 18 and a selection circuit 19 connected to these high-speed interface units 17 and 18.
And a time-division switch circuit 20 connected to the selection circuit 19. High-speed interface unit 17,
Reference numeral 18 is connected to the high-speed interface units 13 and 14, respectively.

High-speed interface units 5, 6, 8, 9, 1
1, 12, 13, 14, 17, and 18 have both a ring network interface function and an ADM network interface function. When registering the high-speed interface unit, identification information for the ring network (section unification) or ADM network (section duplication) is added, and the high-speed interface units 5, 6,
8, 9, 11, 12, 13, 14, 17, and 18 correspond to each other.

FIGS. 2 and 3 show paths passing through the apparatus 2 and paths not passing through in the path route from the apparatus 1 to the apparatus 4. FIG. The device 3 realizes path connection of different networks by a time division switch circuit 16 and a selection circuit 15. In the path registration, the ring network uses a path management number N (N: N: N) as identification information for identifying a path for each of the system 0 and system 1 redundant paths.
By registering (a multiple of 3) and N + 1, the path can be switched by the time division switch circuit 16. Also, ADM
The network switches the high-speed interface units 13 and 14 in section units by the selection circuit 15, so that a management number for each path is unnecessary. However, a virtual number as identification information for identifying a path for connecting to a path of a ring network is unnecessary. The management number N + 2 is managed in association with the path of the ring network. This virtual path management number N + 1 makes it possible to identify a path to which different networks are connected. In this example, since there is one ring network and one ADM network, a multiple of three is used.

The operation of the path shown in FIGS. 2 and 3 will be described. As an example, consider the case of forced switching by remote control. In the case of this forced switching by remote operation, a path management number (path identification information) registered in advance is specified. Since the path from the device 1 to the device 4 is connected to the ring network and the ADM network, the switching points of the device 3 are the two points of path switching by the time division switch circuit 16 and section switching by the selection circuit 15.
Places. When the forced switching is performed, the path (the registration number of the path) from the apparatus 1 to the apparatus 4 is used as the remote control method.
To specify and select whether to switch the path on the ring network side or switch the section on the ADM network side.

In the case of path switching, the device 1, the device 2,
Since the path management number N passing through the apparatus 3 and the path management number N + 1 passing through the apparatuses 1 and 3 are redundant paths, the path is forcibly switched from N to N + 1 by remote control. FIGS. 4 and 5 show the path route after switching from FIG. 2 and FIG. 3 by the ring network.

In the case of section switching, the path number is the virtual path management number N + 2 of the devices 3 and 4. However, the ADM network switches to section units because of redundancy in section units instead of redundancy in path units. FIGS. 6 and 7 show path paths after switching from FIGS. 4 and 5 in the ADM network.

Thus, even if different network configurations are connected, if the path management numbers are N and N + 1, it is determined that there is path redundancy and path switching is performed. When the path management number is N + 2, it is determined that there is no path redundancy, and it can be determined that the ring network is connected to another network.
Can be built inside one device.

Next, a second embodiment of the present invention will be described with reference to the drawings. As shown in FIG. 8, the network path management system according to the second embodiment of the present invention includes a TRM (Termination) in which a high-speed section is unified in a ring network and an ADM network.
It manages a network path connecting the networks. This TRM network manages the virtual path management number N + 1 because the path redundancy is unified and there is no connection to another network. The device 21 has the same structure as the device 3.

Next, a third embodiment of the present invention will be described with reference to the drawings. As shown in FIG. 9, a network path management system according to a third embodiment of the present invention manages a path of a network in which a mesh network having a plurality of high-speed sections is connected to a ring network and an ADM network. Is what you do. The mesh network has a single path, but is managed by the virtual path management number N + 2 because there is a connection to another network. The mesh network comprises devices 21, 23, 2
4, 25, and 26.

The present invention can be applied not only to a network including a ring network and an ADM network, but also to a network in which four types of networks of a ring network, an ADM network, a TRM network, and a mesh network are mixed.

In the embodiment of the present invention, a single connection device performs path management, cross-connects the connections inside the ring network and to other networks on a path-by-path basis, and easily determines the interconnection state of the paths. By providing the means for performing the connection, connection management to different networks can be easily performed. Therefore, in the embodiment of the present invention, it is not necessary to prepare different structures for the connection device for the ring network and the connection device for the other networks.

Further, in the embodiment of the present invention, since a redundant configuration for path switching and section switching suitable for each network can be configured without dropping to a lower transmission stage, the redundant configuration can be established even if different network configurations are connected. And a highly reliable network can be formed. Further, in the embodiment of the present invention, a path termination is performed and a ring network and an ADM are connected by a cross-connect.
Because the network is interconnected, it is not necessary to terminate to the lower transmission step.Since it is realized by a high-speed interface unit, a time-division switch circuit, and a selection circuit, the transmission delay time can be maintained even if different network configurations are connected. does not change. These are made possible by eliminating the need for a physical transmission line termination by connecting to another network by logically terminating the path and cross-connecting in path units.

[0025]

According to the present invention, path management is easy without requiring a low-speed interface unit.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a network path management system according to a first embodiment of the present invention.

FIG. 2 is a block diagram showing a path management system of the network of FIG. 1 in detail.

FIG. 3 is a block diagram for explaining the operation of the network path management system of FIG. 1;

FIG. 4 is another block diagram for explaining the operation of the network path management system of FIG. 1;

FIG. 5 is another block diagram for explaining the operation of the network path management system of FIG. 1;

FIG. 6 is another block diagram for explaining the operation of the network path management system of FIG. 1;

FIG. 7 is another block diagram for explaining the operation of the network path management system of FIG. 1;

FIG. 8 is a block diagram showing a network path management system according to a second embodiment of the present invention.

FIG. 9 is a block diagram illustrating a network path management system according to a third embodiment of the present invention.

FIG. 10 is a block diagram showing a conventional network path management system.

[Explanation of symbols]

1-4 devices 5, 6, 8, 9, 11, 12, 13, 14, 17, 18
High-speed interface unit 7, 10, 16, 20 Time-division switch circuit 15 Selection circuit 21-26 Device

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor: Masaaki Ito 2 thunder god, Yoshioka, Yamato-cho, Kurokawa-gun, Miyagi Prefecture Miyagi NEC F-term (reference) CB13 DA05 DB10 5K033 AA04 CA11 CB08 DA05 DA14 DB12 DB16 DB18

Claims (6)

[Claims] 1. A network in which a ring network and an ADM network are connected by a single connection device, wherein the connection device includes a selection unit that switches in units of sections, and a connection unit that is connected to the selection unit and switches in units of paths. Division switch means; path identification information registration means for registering path identification information for identifying a path of the ring network and the ADM network; and path identification information designating means for designating the path identification information. A path management system for a network, wherein the selection unit and the time-division switch unit manage path switching based on the path identification information designated by the path identification information designating unit. 2. A method for connecting a ring network and an ADM network by one connection device,
In a network in which an M network and a TRM network are connected by one connection device, each of the connection devices includes path identification information for identifying a path between the ring network, the ADM network, and the TRM network. Path identification information registering means for registering, and path identification information designating means for designating the path identification information, wherein the selecting means and the time division based on the path identification information designated by the path identification information designating means A path management system for a network, wherein the switch manages path switching. 3. A method for connecting a ring network and an ADM network by one connection device,
In a network in which an M network and a mesh network are connected by one connection device, each of the connection devices includes path identification information for identifying a path between the ring network, the ADM network, and the mesh network. Path identification information registering means for registering, and path identification information designating means for designating the path identification information, wherein the selecting means and the time division based on the path identification information designated by the path identification information designating means A path management system for a network, wherein the switch manages path switching. 4. In a network in which a ring network and an ADM network are connected by a single connection device, the connection device includes a selection unit for switching in section units, and a switching unit connected to the selection unit for switching in path units. A network path comprising: a division switch unit; a path identification information registration unit that registers path identification information for identifying a path between the ring network and the ADM network; and a path identification information designation unit that designates the path identification information. In the network path management method of the management system, the method further comprises the step of: the selecting means and the time-division switching means managing path switching based on the path identification information specified by the path identification information specifying means. How to manage network paths. 5. A method for connecting a ring network and an ADM network with one connecting device,
In a network in which an M network and a TRM network are connected by one connection device, each of the connection devices includes path identification information for identifying a path between the ring network, the ADM network, and the TRM network. A network path management method for a network path management system, comprising: a path identification information registering means for registering; and a path identification information designating means for designating the path identification information, wherein the path identification designated by the path identification information designating means is provided. A path management method for a network, comprising: a step of managing path switching by the selection unit and the time division switch unit based on information. 6. A method for connecting a ring network and an ADM network by one connection device,
In a network in which an M network and a mesh network are connected by one connection device, each of the connection devices includes path identification information for identifying a path between the ring network, the ADM network, and the mesh network. A network path management method for a network path management system, comprising: a path identification information registering means for registering; and a path identification information designating means for designating the path identification information, wherein the path identification designated by the path identification information designating means is provided. A path management method for a network, comprising: a step of managing path switching by the selection unit and the time division switch unit based on information.