JPH088567B2 - Network connection route search method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a case where a connection path from one node to another node is formed in a network composed of a plurality of nodes and a transmission section connecting them. The present invention relates to an intra-network connection route searching method for searching the connection route.

Here, in the transmission section forming the connection path, one or a plurality of paths are aggregated to form a section as a transmission unit.

Here, the path means a multiplexed line bundle when the user information is multiplexed at a certain bit rate of a hierarchy and transmitted by using a multiplexer. For example, when the information has a frame structure and the user information is transmitted in each time slot in the frame, it is said that the user information is multiplexed by collecting a plurality of time slots for transmitting the user information into one management unit. A set of the user information, which is one management unit, is called a path.

Therefore, the line constructed between the originating and terminating exchanges can also be considered as a path. In addition, a section is defined as a path for transmission by a certain transmission method using a certain transmission medium.
Means a unit of transmission formed by one or more
A section in which the above section is transmitted is called a transmission section.

FIG. 1 is an explanatory diagram showing an example of the configuration of a network to which the present invention is applied, and a path and a section will be described with this diagram as an example.

In FIG. 1, the path 14 is generated by the multiplexer 2 of the node 1, and both the path 13 and the path 15 are one section between the node 1 and the node 21, and a transmission section of a certain transmission medium.
Connected via 12. The node 21 terminates the above-mentioned section once, and then performs a path distribution process.For the path 14, a new section is formed between the node 41 and the node 41, and the path is transferred to the node 41 via the transmission section 38 of a certain transmission medium. Connected.

Here, the term “termination” means that the section or path sent is normally received through control of monitoring and testing, and processing (for example, separating information into units of lower multiplicity) determined according to the received information is performed. It refers to what is done for received information.

The node 41 relays the section, and the transmission section 45
After being connected to the node 51, the section is terminated. After the sections are terminated, the path 14 is connected to the multiplexer 53 of the node 51, where the multiplexer 53 separates the path 14 into units of lower multiplicity (i.e. the path 14 is terminated in the multiplexer 53). ).

Managing a path via connection means that if a certain path is set between a node and another node, the path will be connected via what kind of transmission line, node, or device. It is to search and manage what has been done. For example, if a failure occurs in the path and the node that should receive it cannot receive the path normally, it is necessary to perform a test to isolate the location of the failure, identify the failure point, and perform recovery work. However, in such a case, the isolation test cannot be performed without the information of the connection route, so the information of the connection route of the path is
This is essential management information.

[Conventional technology]

Conventionally, in order to collect information on the path connection route, sections and paths are managed by closing them between nodes that terminate sections or paths based on individual forms. That is, regarding the section, the section end is managed only by closing between the nodes terminating the path, and regarding the path, the path end is managed only by closing between the nodes terminating the path. Therefore, when obtaining the information on the path continuation route as described above, the path connection route is derived by collating all the information between the section end nodes related to the path and the information between the path end nodes, and Was managed in the form.

[Problems to be Solved by the Invention]

In the conventional technology, since sections and paths are managed individually, it is not possible to manage paths and sections in correspondence with each other, so path management for the entire network is possible only as a result of integrating the forms that each node has. Next to
It was extremely difficult to execute the path management of the entire network in real time. For example, if a part of the path connection path is changed due to a failure or other reason, it is necessary to collate the forms again and change all the related forms. There is also a problem that the path of the existing path and the path of the path described in the form may conflict with each other.

The present invention solves such a problem, and even when the connection route of the path is partially changed, the connection route in the network that can promptly find the connection route of the path without changing the form It is to provide a search method.

[Means for solving the problem]

To achieve the above object, in the present invention, ID information is given to each of a transmission section, a node, and various connection devices that configure the node, and path-end inter-node ID information is provided on a signal frame configured for a path. In addition to providing a transfer area, when one or a plurality of paths are assembled to form a section as a transmission unit, an ID information transfer area between section end nodes is also provided on the signal frame configured for the section. It was

[Action]

In the present invention, ID information is given to each of the transmission section, the node, and the devices that compose the node. For example, here, the section ID information of the transmission section, the node ID information of the node itself, and the apparatus ID information of the apparatus used for the path connection in the node are defined as the ID information regarding each node. A signal frame is configured to transmit information, and a section termination inter-node ID information transfer area that transmits the ID information between the nodes terminating the section on the frame,
Path end inter-node ID information transfer areas for multiplexing the path information between the nodes terminating the path and transmitting the ID information are provided. Between the nodes that terminate the section, the ID information regarding the own node is transferred using the ID information transfer area between the section end nodes. At the node that received the ID information,
ID information is extracted, and the extracted ID information is used between the path end nodes.
Multiplexed in the ID information transfer area, ID between section end nodes
After newly adding ID information regarding the own node to the information transfer area, it is transmitted to the next connected node. By repeating the same operation, the node ID information and section
ID information and device ID information are sequentially multiplexed.

As a result, the node that terminates the path receives the ID information of the connection path from the transmission end to the reception end of the path. Since the ID information transfer area between the path end nodes is multiplexed with the path and transmitted, it is possible to manage the ID information of the connection path in association with the path. As a result, in the operation center, regarding the desired path of the desired node, a path trace is executed which node and transmission path the path was connected to, and which node and what device was used to connect. It becomes possible to grasp easily by time processing.

〔Example〕

FIG. 1 is an explanatory diagram showing an example of a network configuration for tracing a path connection route by applying the method of the present invention, as described above. FIG. 2 is an explanatory diagram showing an example of a signal frame structure configured for a section when the path connection path is traced by the method of the present invention. FIG. 5 is an explanatory diagram showing an example of a conventional signal frame configuration for comparison.

In FIG. 5, the signal frame 82 is composed of 81 frame signals (synchronization signals) and 110 user information, while in FIG. 2, the signal frame 80 is 110 user information and 90 user information. Section end node ID information transfer area and
ID information transfer area between 100 path end nodes is multiplexed,
It will be understood that the structure is such that 81 frame signals (synchronization signals) indicating the beginning of the frame are added.

The signal frame 80 shown in FIG. 2 is a case where a section as a transmission unit is configured by one path, so only one ID transfer area between path end nodes is provided, but a plurality of paths are aggregated. If a section is configured as a transmission unit, the number of path end node IDs corresponding to that number
A transfer area is provided.

In FIG. 1, in the MUX unit (multiplexing processing unit) 4 of the multiplexer 2 in the node 1 that terminates the path, the path 13,
Path end node I for each path 14 and 15
D Information transfer area 100 is generated, and each path end node ID
The ID information processing unit 5 of the multiplexing device 2 adds the device ID information of the multiplexing device 2 to the information transfer area, and then transmits the information to the section terminating device 3. The ID information processing unit 7 of the section terminating device 3 adds the device ID information of the section terminating device 3 and the node ID information instructed by the intra-node ID information management unit 8 to the section terminating node ID information transfer area 90, The section (section termination processing section) 6 performs section termination processing, and then transmits to the transmission section 12.

In the LT unit 25 of the section termination processing device 22 of the node 21,
After terminating transmission section 12, cross-connect equipment
The transmission section 12 transmits the ID information transferred in the section-end node ID information transfer area 90 by the ID information processing unit 26 to the transmission section 12 in which the ID information is received.
With the ID information and the device ID information of the section terminator 22,
Transfer to the in-node ID management unit 37. Cross connect device 23
In the ID information processing unit 28 of the section termination device 22, the ID information processing unit 26 of the section terminating device 22 extracts various ID information transferred to the intra-node ID management unit 37 from the intra-node ID management unit 37, and the ID information is extracted from the cross-connect device 23. CC (Cross Connect) after multiplexing with the device ID information of
The unit 27 connects the input path 13, path 14, and path 15 to respective predetermined connection destinations. Pass 13 is CC section 27 in node 21
Terminated in. Path 15 is a section terminator 32
After connecting to the
And is connected to a node different from both the node 41 and the node 51.

The path 14 is connected to the section terminating device 24, and the ID information processing unit 30 newly adds the ID information of the node 21 and the device ID information of the section terminating device 24 to the section terminating node ID information transfer area 90, After the section end processing is performed by the LT unit 29, it is transmitted to the transmission section 38. In the relay device 42 of the node 41, the relay processing unit (REP unit) 43 performs the relay process of the transmission section, and the ID information processing unit 44 of the relay device 42 causes the ID information of the node 41 and the device ID of the relay device 42.
Information is multiplexed in the inter-section end node ID information transfer area 90 and transmitted to the transmission section 45.

In the section terminator 52 of the node 51, the LT unit 54
Terminates the transmission section 45 by transmitting the path 14 to the multiplexing device 53, and at the same time, by the ID information processing unit 55, the ID information transferred in the section termination inter-node ID information transfer area 90 is
The intra-node management unit 58 together with the section ID information of the transmission section 45 in which the ID information is received and the apparatus ID information of the section terminator 52.
Transfer to. The MUX unit 56 of the multiplexing device 53 performs termination processing of the path 14 and also extracts the ID information multiplexed in the ID information transfer area 100 between the path termination nodes in the ID information processing unit 57, It is transferred to the in-node ID management unit 58 together with the device ID information.

The ID information collected in the in-node ID management unit 58 is transferred as the ID information 71 of the path connection path to the operation center 70 that manages the ID of the network. Path connection route information
The contents of 71 include the node ID information, the section ID information, and the device ID information that the path 14 has passed through until it is terminated at the node 51. As a result, the operation center 70 determines the path connection route of the network. You can search.

In Fig. 2, ID information transfer area between section end nodes
90 shows a state in which various ID information is multiplexed in the ID information transfer area 100 between 90 and the path end node. Between section end nodes
In the ID transfer area 90, node ID information 91, section ID information 92, device
When the ID information 93 is transferred and is connected via a node such as the node 41 which only relays the transmission section,
IDs such as node ID information 94, section ID information 95, device ID information 96
Information is multiplexed and transferred. In the ID transfer area 100 between the path end nodes, the node ID information 101, the section ID information 102, the device ID
With respect to the ID information such as the information 103, the ID information such as the node ID information 104, the section ID information 105, and the device ID information 106 is sequentially multiplexed and transferred every time the node passes through the node.

Also, in FIGS. 3 and 4, among the connection paths of the section and the path, the node ID and the transmission section ID are sequentially multiplexed and transferred to the ID information transfer area, and the IDs of the devices used for connection are FIG. 10 is an explanatory diagram showing an example of a case where the ID management unit in the node where each device is placed manages the path.

In Fig. 2, the ID transfer area between section end nodes
90 and the path transfer node-to-node ID transfer area 100
D, transmission section ID and device ID were transferred,
In the example of FIG. 4, in the ID transfer area 90 between the section end nodes and the ID transfer area 100 between the path end nodes, the node ID information,
Only the section ID information is transferred. As shown in FIG. 3, the device ID information is managed by the in-node ID management unit of each node, and is recorded in the device ID information record DB (database) of the device used in each node (for example, used in node 1). apparatus
ID information record DB9, device ID information record DB3 used at node 21
9, the node 51 records it in the device ID information recording DB 58).

In the operation center 70, the node ID information and the section ID information of the connection route are received from the node 51 terminating the path 14, and if necessary, each node inquires of the in-node ID management unit for the device ID to be used. In the node ID management unit of the node that made the inquiry, the device ID information recording DB
The device ID information is extracted from the contents, and the contents (for example, device ID 75 for node 1 and device ID for node 21)
In the case of 74 and node 41, the device ID 73) used is notified to the operation center 70.

In this case, since the ID information to be managed is distributed and managed, the load on the operation center 70 is reduced, and management at a more detailed level is possible. At that time, the method of the present invention in which an ID information transfer area is provided and ID information is sequentially multiplexed and transferred is also effective for device management methods including those at the unit level and the connector level in the node.

〔The invention's effect〕

 According to the present invention, the following effects can be expected.

(B) Even when the path connection path is changed due to a failure or the like, the path connection path information received at the path terminal node is automatically updated, and the path can be searched automatically and quickly.

(B) In addition to the ID of each node, the ID of the device used for the path connection is also added and transmitted at the same time, so that the usage status of the devices constituting the network can be grasped at the same time.

(C) When performing path management on the entire network, you can obtain information on the path connection path including the device used by simply specifying the desired path to the desired node, and comprehensively manage the form as in the past. Since there is no need to manage it, path search management of the entire network can be performed easily in real time.

[Brief description of drawings]

1 is an explanatory diagram showing an example of a node configuration to which the present invention is applied, and FIG. 2 is an explanatory diagram showing an example (corresponding to FIG. 1) of a signal frame configuration for a section when the present invention is applied, FIG. 3 is an explanatory diagram showing another example of a node configuration to which the present invention is applied, and FIG. 4 is an explanatory diagram showing another example (corresponding to FIG. 3) of a signal frame configuration for a section when the present invention is applied. FIG. 5 and FIG. 5 are explanatory views showing an example of a conventional signal frame structure. Explanation of reference numerals 1 ... Node, 2 ... Multiplexing device, 3 ... Section terminating device, 4 ... MUX (multiplexing) unit of the multiplexing device 5, 5 ...
... ID information processing unit of the multiplexing device 2, 6 ... LT (section termination) unit of the section terminating device 3, 7 ... ID information processing unit of the section terminating device 2, 8 ... ID management unit in the node 1, 9 ... Used device record DB, 12 ... Transmission section, 13 ... Path, 14 ... Path, 15 ... Path, 21 ... Node, 22 ... Section termination device, 23 ... Cross-connect device, 24 ... …
Section terminator, 25 ... LT of section terminator 22
(Section termination) section, 26 ...
ID information processing unit, 27 ... CC (cross connect) unit of the cross connect device 23, 28 ... ID information processing unit of the cross connect device 23, 29 ... LT (section end) unit of the section terminating device 24, 30 ... … Section termination device 24 ID information processing unit, 32 …… Section termination device, 35 …… Section termination device 32 LT (section termination) unit, 36 …… Section termination device 32 ID information processing unit, 37 …… Node 21 ID management unit, 38 ... transmission section, 39 ... used device record DB, 40 ... transmission section, 41 ... node, 42 ... transmission section relay device, 43 ...
… Section termination device relay processing (REP) unit, 44 …… Transmission section ID information processing unit of relay apparatus, 45 …… Transmission section, 51…
... node, 52 ... section terminating device, 53 ... multiplexing device, 54 ... LT (section terminating) unit of section terminating device 52, 55 ... ID information processing unit of section terminating device 52,
56 ... MUX (multiplexing) unit of the multiplexing device 53, 57 ... ID information processing unit of the multiplexing device 53, 58 ... ID management unit in the node 51,
59 …… Used device record DB, 70 …… Operation center,
71 …… Path connection route ID information, 72 …… Path connection route ID
Information, 73 …… ID information of the device used for path connection, 74 ……
ID information of the device used for path connection, 75 ... ID information of the device used for path connection, 80 ... Signal frame to which the present invention is applied, 81 ... Frame signal indicating the beginning of the signal frame,
82 …… Conventional signal frame, 90 …… Section end node ID information transfer area, 91 …… Node ID information, 92 …… Section
ID information, 93 ... Device ID information, 94 ... Node ID information, 95 ...
… Section ID information, 96 …… Device ID information, 100 …… Path end node ID information transfer area, 101 …… Node ID information, 102 ……
Section ID information, 103 ... Device ID information, 104 ... Node ID information, 105 ... Section ID information, 106 ... Device ID information, 110 ...
User information

Continuation of the front page (51) Int.Cl. ⁶ Identification number Reference number within the agency FI Technical indication location H04Q 11/04 (56) References JP 63-164738 (JP, A) JP 63-206047 (JP , A) JP-A-2-55455 (JP, A) JP-A-3-504552 (JP, A)

Claims (1)

[Claims] 1. A method for searching a connection route in a network, which searches a connection route when a connection route from one node to another node is formed in a network composed of a plurality of nodes and a transmission section connecting them. In, when ID information is given to each of the transmission section, the node, and each connection device that configures the node, and one or more paths are aggregated to form a section as a transmission unit at a certain node. Is a path end inter-node ID information transfer area provided on the signal frame configured for each path, and the path is selected from the ID information of the transmission section, the node, and various connection devices that configure the node. After taking out and adding the ID information related to the connection route, the one or more paths are assembled to form a section as a transmission unit. It transmits to the transmission section, and at that time, the section end node inter-node ID information transfer area is also provided on the signal frame configured for the section, and in each node to which the section is transmitted, the node through which the section passes , The transmission section and the ID information of the connection device are sequentially multiplexed and transmitted in the section end node ID information transfer area, and when the section is terminated at a node and separated into one or a plurality of paths Reads and multiplexes the ID information multiplexed in the section-end node ID information transfer area to the path-end node ID information transfer area provided on the signal frame configured for each path. All the IDs added from the ID information transfer area between the end nodes of the path.
An in-network connection route search method, characterized in that information is read and a connection route to the terminal node is obtained.