JP2011249884A - Optical communication network and communication path setting method and optical communication network management system and operation system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To construct an operation system which is capable of easily operating routes with guaranteed quality only by constructing an optical communication network with an efficient transmission system having a necessary minimum function in which quality guarantee for an unavailing route has been removed.SOLUTION: An operation system acquires transmission specification classification information and association information of that information and a node constituent component or communication path pattern from a transmission information DB, and sets a communication path by transmitting, to an optical node device, control message including information acquired from the transmission information DB, a node constituent element according to transmission specification type information, and connecting a transmission system. That is, regarding a DB recording transmission specification and transmission system type, a DB referred to when a communication network is built and a DB referred to when a communication network is operated are made common, a communication network is built such that a DB facility is not become excess at the construction of a network, and the DB which is referred to at operation is clear in relationship between a route pattern and transmission specification.

Description

  The present invention relates to an optical communication network, a communication path setting method, an optical communication network management system, and an operation system, and more particularly, by an optical cross-connect device having a function of transmitting an optical signal on a communication path by a transponder at the start of the communication path. The present invention relates to an optical communication network, a communication path setting method, an optical communication network management system, and an operation system for configuring a communication path such as an optical path, an LSP (Label Switched Path), a TDM path, and an MPLS-TP path and performing communication.

  As a technology related to a conventional optical cross-connect network, there is one that describes an architecture of an optical communication network and a concept of a transmission system requirement connected to the architecture (for example, see Non-Patent Document 1).

  In addition, a technique for changing the output of the communication path according to the service quality class provided to the user has been studied.

  Builds a backbone communication network with flexible management functions for large-capacity lines by using optical cross connect (OXC) and ROADM (reconfigurable add / drop multiplexer) to dynamically set large-capacity optical communication paths Is possible. In such an optical communication network using OXC and ROADM, it is possible to construct a communication network with reduced link cost by connecting each node (OXC) with a wavelength-multiplexed WDM line. The present invention relates to a WDM mesh network and WDM ring / multi-ring network in which such OXCs are connected by WDM links.

  When long-distance transmission is performed using an optical transmission system, the transmission distance is limited due to the deterioration of the optical signal (maximum transmission distance limitation). Will increase. In addition, the size of the maximum transmission distance restriction depends on the bit rate of the communication channel to be set and the wavelength interval at the time of wavelength multiplexing, and the longer the bit rate becomes, the longer the wavelength interval becomes. There is a property that the constraint becomes larger. Therefore, in general, in an optical communication network, as the required transmission distance becomes longer or the required bit rate becomes higher, transmission systems and node devices (OXC, ROADM) with higher performance and better transmission characteristics are required. Necessary and network costs tend to increase. At the same time, operating an optical communication network in consideration of such transmission distance restrictions requires a very complicated operation system and enormous management operations.

  The present invention relates to a technique for efficiently constructing an optical communication network having such characteristics while ensuring maintainability.

ITU-T Recommendation G.680, 07.2007

  However, the non-patent document 1 does not adopt the concept of adaptively determining transmission specifications in accordance with the communication path set in the operation phase. Therefore, the problem of cost increase due to the construction of a communication network equipped with an overperformance transmission system cannot be solved. Also, complicated operations that consider the suitability of transmission specifications are not assumed, and methods for avoiding such complicated operations have not been studied.

  In addition, the technology for changing the output of the communication path according to the service quality class provided to the user does not upgrade the communication network in consideration of the quality of the service provided to the user, and provides the service. In consideration of the degree of difficulty (transmission specifications) to be set when setting the communication channel itself, the communication network is sophisticated, and is different from the technology that considers the service quality provided to the user.

  In the technology of the present invention, the construction phase and the operation phase of the optical communication system are assumed.

1) Construction phase in which an optical communication network is constructed by connecting a transmission system and node equipment according to a topology determined in consideration of the transmission system requirements:
2) Operation phase of the optical communication path that sets the optical communication path in the constructed optical communication network:
The present invention simultaneously solves the following two close problems in each of the above phases.

  Problem 1: In the construction phase, reduce the equipment cost of the optical communication network and construct the network.

  Problem 2: In the operation phase, the operation considering the transmission restriction distance of the optical communication network is simplified. The operation system also simplifies the configuration and scale.

  The above problem will be described below.

<Description of Problem 1>
When constructing an optical communication network, consider the transmission specifications (maximum transmission distance, number of allowable passing nodes, transmission distance, bit rate) to realize the optical communication path that is assumed to be set between each node base, and the performance of the transmission system Requirements are determined. However, in practice, there are innumerable communication paths that are assumed to be set on the optical communication network, and generally, transmission specifications required for setting each required communication path are different. In such a case, from the viewpoint of avoiding complicated transmission design and avoiding complicated operation (Problem 2), the transmission system specifications are determined according to the routes of all communication paths assumed from the physical topology. It is customary to construct an optical communication network according to the result. In the case of such an optical communication network design method, only the transmission specifications required for a small part of optical communication paths are severe conditions, and even if the transmission specifications required for most optical communication paths are permissive. In order to construct a system in accordance with a transmission path with strict requirements, a result is that a transmission system with a higher performance than necessary is used for a communication path that occupies most of the requirements and has less stringent requirements. Such an overspec transmission system causes an increase in equipment cost of the optical communication network.

  For example, there are an infinite number of routes from A to Z in a physical topology communication network as shown in FIG. In the figure, three routes are shown as examples. Among these, the route # 1 and the route # 3 are routes that efficiently pass through the links from A to Z, but the route # 2 is a route that detours inefficiently. In a communication network, the route that excessively passes the link such as the route # 2 is not used in most cases. However, the conventional optical communication network design policy is to design and deploy transmission systems so that optical signals are transmitted with high quality even for such severe transmission conditions that result in an excessive number of hops. It was normal to do so and was given excessive performance.

<Description of Problem 2>
As described above, because the transmission distance of an optical transmission system is limited, when setting a communication path in the constructed optical communication network, the transmission distance required for the originally set communication path is set by the corresponding transmission system. It is necessary to check whether transmission is possible. However, in an optical communication network having a physical topology with dozens to dozens or more node scales, there are an extremely large number of route patterns that can set communication paths on the topology (for example, in the case of 100 nodes, the destination pattern from a certain start node) There are 99 patterns for each option alone, and there are many route patterns for each.) The operator himself / herself manages whether the transmission specifications for each route pattern are satisfied and the optimum transmission system according to the requirements. Establishing and allocating and constructing and operating a network requires extremely complicated operation of the communication network, and significantly reduces maintainability.

  Further, in the prior art, when the transmission specifications are different, it is necessary to prepare an individual operation system and its linkage system, and there is a problem that the scale of the operation system becomes remarkably large and the system cost increases.

<Importance of simultaneous resolution of Problem 1 and Problem 2>
In order to avoid the maintainability degradation as in Problem 2, a high-cost communication network as in Problem 1 is inevitable. However, since these two issues with different assumed phases have been discussed independently, when discussing issue 2 as the operation phase issue, transmission of sufficient performance as described in issue 1 during the construction phase Assuming that the system is easy, there is a tendency that has been considered unnecessary. In the construction phase, in order to avoid the problem 2, there is a tendency that a high-cost network like the problem 1 is forced to be constructed. For this reason, considering the issues 1 and 2 at the same time, it is possible for the first time to truly reduce the cost and operation of the network, and simultaneously solving the issues 1 and 2 is extremely important from the viewpoint of inventive step. It becomes.

  The present invention has been made in view of the above points, and an optical communication network is constructed with an efficient transmission system having a minimum necessary performance that eliminates quality assurance for useless paths, and the quality is guaranteed. An object of the present invention is to provide an optical communication network, a communication path setting method, an optical communication network management system, and an operation system that can easily operate only a route.

In order to solve the above problems, the present invention (Claim 1) is an optical communication network configured by connecting an optical node device and a plurality of types of transmission systems having different transmission specifications.
A communication network construction system having a function of determining classification information of transmission specifications when constructing a communication network, having a function of correlating with a node component, a communication path pattern, and a function of outputting the determined information;
An operation system comprising a resource information construction function for each transmission specification, a management function of the resource, and a communication network control function;
Common to communication network construction system and operation system, transmission specification classification definition information, correspondence information between transmission specification classification information and node component or communication path pattern, and usable transmission system type information. A transmission information database with the ability to save;
With
The operation system includes the information in the optical node device according to the transmission specification classification information determined by the communication network construction system and stored in the transmission information database and the correspondence information with the node configuration element or the communication path pattern. By transmitting the control message, the node corresponding to the transmission specification type information and the transmission system are connected, and the communication path corresponding to the specified transmission specification classification is configured.

  As a result, it is not necessary to provide an overperformance transmission system, and the communication network construction cost can be reduced.

The operation system of the present invention (Claim 2)
Means for acquiring transmission specification classification definition information, and correspondence information between the transmission specification classification information and a node component or a communication path pattern from an external storage device;
Data information that can be output by filtering only the communication network resources that can be used in the transmission specification and communication path pattern that are keyed from the resource information of the entire communication network using the transmission specification and the communication path pattern as a key. A resource information construction function means comprising a construction function;
A resource information database having a function of storing the resource information constructed by the resource information construction function means.

  This makes it possible to quickly find and quickly connect to appropriate communication network resources even in communication networks that have multiple transmission specifications in the same communication network. Can be avoided. In addition, even in a communication network in which communication paths having a plurality of transmission specifications are mixed in the same communication network, the operator can easily grasp resources for each transmission specification. In addition, it is possible to eliminate different operation systems and associated devices for each transmission specification, leading to simplification of the system.

The optical node device in the communication network according to the present invention (claim 3)
Means for exchanging control messages with other nodes;
By including the type information of the transmission specification of the path to be set in a signaling (communication channel setting) message and notifying other nodes, each component node of the communication channel has means for setting the communication channel with the same transmission specification type.

  As a result, even in a communication network in which communication paths having a plurality of transmission specifications are mixed in the same communication network, an appropriate node component can be properly found and quickly connected, and further, transmission of the communication path component can be performed. Specification mismatch can be avoided.

An optical node device in the communication network of the present invention (Claim 4)
Connection means for multiple types of transmission systems with different transmission specifications;
Means for receiving transmission specifications of node components and correspondence information of connected transmission systems;
Means for connecting the node components having the matching correspondence with the transmission system.

  As a result, it is not necessary to provide a transmission system having performance related to an excessive bit rate, maximum transmission distance, and frequency interval, and the communication network construction cost can be reduced. Moreover, even in a communication network in which communication paths having multiple transmission specifications are mixed in the same communication network, it becomes possible to quickly connect an appropriate transmission system and node components, and the transmission specifications of the communication path components do not match. Can be avoided.

The present invention (Claim 5) is a communication path setting method for setting a communication path in an optical communication network configured by connecting an optical node device and a plurality of types of transmission systems having different transmission specifications.
A communication network construction system having a function of determining classification information of transmission specifications when constructing a communication network, having a function of correlating with a node component, a communication path pattern, and a function of outputting the determined information;
An operation system comprising a resource information construction function for each transmission specification, a management function of the resource, and a communication network control function;
Common to communication network construction system and operation system, transmission specification classification definition information, correspondence information between transmission specification classification information and node component or communication path pattern, and usable transmission system type information. A transmission information database with the ability to save;
In a communication system comprising:
The operation system obtains transmission specification classification information from the transmission information database, and correspondence information between them and a node component or a communication path pattern;
A step of setting a communication path by transmitting a node configuration element having the same transmission specification type information including the information acquired from the transmission information database to the optical node device by the operation system and a control message for connecting the transmission system to the node device. And consist of

  As a result, it is not necessary to provide an overperformance transmission system, and the communication network construction cost can be reduced.

Further, the present invention (Claim 6) is an optical communication network management system provided with a management control function for grasping and controlling the state of a communication network in an optical communication network in which a plurality of different types of clients are accommodated in an optical node device. There,
It has a management control device that configures a communication path by providing client attribute classification information to the constituent elements of the optical node device and the transmission system, and connecting the constituent elements that match the client classification information and the transmission system.

  As a result, an optical communication network can be provided in a unified manner to a plurality of client communication networks having different attributes, and management operations for each of the plurality of clients can be reduced. In addition, since equipment is shared by a plurality of clients, equipment costs can be reduced.

The present invention (Claim 7) is an operation system in an optical communication network configured by connecting an optical node device and a plurality of types of transmission systems having different transmission specifications,
Means for acquiring from the external storage device the definition information of the transmission specification classification, and the correspondence information between the transmission specification classification information and the node component or the communication path pattern;
Data information that can be output by filtering only the communication network resources that can be used in the transmission specification and communication path pattern that are keyed from the resource information of the entire communication network using the transmission specification and the communication path pattern as a key. A resource information construction function means comprising a construction function;
A resource information database having a function of storing resource information constructed by the resource information construction function means;
Communication that transmits a control message to the optical node device of the communication network for the transmission specifications and communication network resources that can be used for each communication path pattern constructed by the resource information construction function means, and sets the components of each node device to the reserved state. Road control function means.

  This eliminates the need to perform work in consideration of the transmission classification and route pattern of the components of each node, and simply specifies a virtual link that matches the desired transmission specifications with the start and end nodes. Communication network operation becomes possible. That is, it becomes possible to intuitively grasp only a path pattern that can be transmitted by eliminating a path pattern that cannot actually transmit an optical signal. Furthermore, the operator can easily grasp available resources by inputting a desired transmission specification classification into the operation system. As a result, it is possible to reduce the operator's operation mistakes and shorten the operation time.

  According to the present invention, it is possible to construct a communication network that allocates an efficient transmission system according to the requirements of the communication path, and it is possible to reduce the equipment cost of the communication network. In addition, it is possible to reduce maintenance operation of a communication network in which facilities having different transmission specifications coexist, and to reduce the management system cost.

  In addition, it is possible to share and use infrastructures such as communication network node devices and transmission systems in communication paths having different requirements.

1 is a system configuration diagram according to an embodiment of the present invention. It is the figure which showed in principle the database relevant to the resource information construction function of this invention. It is a flowchart of the communication network construction procedure of this invention. It is an example of a physical topology, a communication channel demand, and a communication channel pattern. It is a transmission system used for classification of transmission specifications for each communication path pattern. It is an example of transmission specification classification assignment to a node component (port). It is an example of communication network construction. It is an example of a communication network. This is a conventional resource management method. It is a resource management method in the case of the method of this invention. It is an example of the transmission system in the 1st Embodiment of this invention. 3 is a node configuration example according to the first embodiment of the present invention. It is an example of the setting of the communication path in the 1st Embodiment of this invention. It is an example of the transmission system in the 2nd Embodiment of this invention. It is an example of the transmission system in the 3rd Embodiment of this invention. It is a node structural example in the case of mixing the demultiplexing trees from which the wavelength interval differs in the 5th Embodiment of this invention. It is an example of the transmission system in the 5th Embodiment of this invention. It is a block diagram in the case of classifying based on the client attribute by the 6th Embodiment of this invention. It is an example of the transmission system in the 6th Embodiment of this invention. It is a virtual link topology in the 7th Embodiment of this invention. It is an example of the path | route candidate in a physical topology communication network.

  Embodiments of the present invention will be described below with reference to the drawings.

  FIG. 1 shows a system configuration according to an embodiment of the present invention.

  The system shown in the figure uses a communication network construction system 100 that performs construction work of a communication network and an operation system 200 that provides an operation function of the communication network after construction by using the present invention. By utilizing the transmission information database 300 that manages the correspondence of the transmission systems to be allocated as a common database for transmission specification classification, it is possible to reduce the cost of the optical communication network while maintaining the maintainability of the optical communication network. .

  The communication network to which the invention is applied includes a communication network construction system 100, an operation system 200, a transmission information database 300, a communication path demand database 400, and an optical communication network 500.

  Below, the function of the component of said system is demonstrated.

<Communication network construction system 100>
The communication network construction system 100 has the following functions.

  A function of acquiring a communication path pattern and transmission requirement information from the communication path demand database 400 is provided.

  A function of acquiring transmission specification classification definition information from the transmission information database 300 is provided.

  A function for determining the physical network topology of the communication network and a function for determining connection specifications for constructing the communication network are provided.

  A function for determining the correspondence between node components and transmission specification classifications is provided.

  A function for determining correspondence information between communication path patterns and transmission specification classifications is provided.

  The transmission information database 300 has a function of storing association information between node components and transmission specification classifications, and association information between communication path patterns and transmission specification classifications.

  A function of acquiring association information between node components and transmission specification classifications and association information between communication path patterns and transmission specification classifications stored in the transmission information database 300 is provided.

<Operation System 200>
The operation system 200 has the following functions.

  The operation system 200 includes a resource information database 210, a communication path control function unit 220, and a resource information construction function unit 230.

  A function of controlling the constructed optical communication network 500 with a control message is provided.

  A resource management function of the optical communication network 500 is provided.

  A function of extracting resource information that satisfies the specified transmission specification condition from the resource information of the entire optical communication network and constructing resource information for each transmission specification is provided.

  The resource information database 210 of the operation system 200 is a database that stores information that does not depend on the transmission specification classification and information for each transmission specification classification as follows.

1) The following information that does not depend on the transmission specification classification (wavelength resource information);
-Number of mounted wavelengths: Number of wavelength channels mounted (physical facilities are prepared) on each link in the physical topology;
Number of wavelengths used: Information on the number of wavelength channels currently used in each link in the physical topology;
-Free wavelength information: Information on the number of free wavelength channels in each link in the physical topology;
2) The following information for each transmission specification category (wavelength resource information for each transmission specification category);
Effective number of wavelengths: Transmission system of the applicable transmission specification classification, and the number of wavelength channels that can be connected to transmission resources (for each communication path pattern);
Effective number of wavelengths: The number of wavelength channels currently used in the relevant transmission specification classification (for each channel pattern)
Effective number of wavelengths: The number of wavelength channels that can be connected to transmission systems and transmission resources of the corresponding classification, but are not used and regarded as empty when used in the corresponding transmission specification classification (each communication path route pattern);
The resource information construction function unit 230 can obtain a resource that can use the communication path of the transmission specification classification by accessing the resource information database 210 using the transmission specification classification as a key.

  The resource information construction function unit 230 of the operation system 200 constructs the resource management database 210 as follows.

  -Information that does not depend on the transmission channel classification of the wavelength channel information (1) above of the communication network can be collected by using an existing control protocol such as OSPF-TE installed in the node equipment.

  The transmission specification classification method is collected by referring to the transmission information database 300 and referring to the information recorded in the transmission information database 300 when the communication network is constructed.

  The transmission specification classification assignment information for the node component, which indicates which transmission specification category the node component of each node is assigned to, is also collected from the transmission information database 300 with reference to the transmission information database.

  Further, the wavelength resource information for each transmission specification classification in the information on the available resources for each transmission specification (2) can be constructed by any of the following methods.

  -Only the wavelength channels existing on the transmission system corresponding to the transmission specification classification are counted as resources.

  -Only the wavelength channels that can be connected to the node components to which the relevant transmission specification classification is assigned at the time of construction are counted as resources.

  The communication control function unit 220 has the following functions.

    A function unit that realizes a control function such as setting / deleting a communication path by exchanging a control message with a node device of the communication network.

    -It is connected to the optical communication network by a communication network for control messages such as Ethernet (registered trademark).

    A function of acquiring correspondence information between communication path patterns and transmission specification classifications and correspondence information between node components and transmission specification classifications from the transmission information database 300 is provided.

<Transmission information database 300>
The transmission information database 300 is a database that stores the following information.

-Definition information of transmission specification classification-Correspondence information of node component and transmission specification classification (transmission specification classification allocation information for node component)
-Correspondence information between transmission path pattern and transmission specification classification (transmission specification allocation information for communication path pattern)
Information on available transmission system types Details of the transmission information database 300 will be described later.

<Communication path demand database 400>
The communication path demand database 400 is a database that stores service requests and service specifications between each base of the communication network.

  The optical communication network 500 is a communication network configured by connecting an optical node device such as ROADM or OXC and a transmission system.

  FIG. 2 is a diagram showing in principle a database related to the resource information construction function.

Means related to the resource information construction function include transmission specification storage means, resource information construction means, resource information storage means, and communication path control means. The transmission specification storage means corresponds to the transmission information database 300, and the resource information storage means corresponds to the resource information database 210. The resource information construction means corresponds to the resource information construction function unit 230 in the operation system. (In this description, the resource information storage means and the resource information construction means are described in the same system, and the transmission specification storage means is assumed to be in another system. It can be deployed or all on the same system.)
The transmission specification storage means stores the classification and definition of transmission specifications for setting the communication path.
Transmission specifications are transmission requirements such as bit rate, transmission distance, number of passing nodes, and combinations thereof.

  Resource information construction means (resource information construction function unit 230) is means for classifying and storing resource information of the entire communication network for each transmission specification. A resource is a transponder (transmitter / receiver), an optical amplifier, an optical fiber, a port of a node device, a wavelength interval of a communication wavelength channel, and a combination thereof. By combining these resource types, it is possible to manage resources in units of transmission systems realized with various performances. In the case of a ring network, it is also possible to manage resources in units of rings that combine these resource types.

  The resource information storage means (resource information database 210) is a storage means for storing resource information for each transmission specification. The storage means is accessed, and the available resource information is acquired by applying the corresponding transmission specification using the transmission specification as a key.

In this specification, “transmission specification” is the maximum transmission distance of the communication channel to be set, the number of allowable passing nodes, the bit rate, and a combination thereof.
-“Transmission specification classification” is a reference value that determines the transmission resources to be allocated to the transmission specifications from among transmission systems with different performances. The transmission system to be applied to the communication path is determined.
“Transmission system” is a combination of transmission resources.
"Transmission resource" is a component for realizing optical transmission between the start point and end point of a communication path, transceiver / receiver (transponder), optical fiber, optical amplifier, regenerator, attenuator, wavelength multiplexing / An optical transmission system between distant bases is realized by connecting a node such as a separator and components within the node.
The “optical node” is an optical communication path control node such as OXC (Optical Cross Connect) and ROADM (Reconfigurable Optical Add / Drop Multiplexer), and a hybrid node of these with a digital cross connect and a packet switch.
“In-node components” are input / output ports of nodes, attenuators, optical amplifiers existing in the nodes, and the like.
A “communication path” is an optical path realized by circuit-based, packet-based, TDM optical path, or optical burst technology. It is also a path that groups them.
“Resource” is a wavelength (spectrum), optical polarization, time slot, optical switch port, transmission interface band, code, address, label, or a group thereof. (In this specification, wavelength will be described as a main example.)
The transmission information database 300 described above is
1) Transmission systems that can be used and transmission specifications that can be realized by the transmission system,
2) Classification definition information of transmission specification classification,
3) Transmission specification classification applied to each channel pattern for each channel pattern type,
4) A database for storing and managing node component elements and transmission specification classification correspondence information.

  1) Available transmission systems and feasible transmission specifications, and 2) Transmission specification classification definition information is preliminarily designed for transmission by other systems, input GUIs, etc., and registered in the transmission information database 300. At this time, a plurality of types of transmission systems that can be used are classified and stored according to transmission specifications that can be realized by each.

  2) The transmission specification classification definition method stored in the transmission information database 300 is simply a method of specifically specifying an applicable transmission system and determining in consideration of a combination of transmission resources (transmission system). A method of individually classifying transmission resources from the values of requirement parameters (allowable passing node number, maximum transmission distance, bit rate) serving as transmission specifications is assumed.

  When deciding in consideration of applicable transmission resource combinations (transmission systems), list the transmission systems (transmission resource combinations) that can be used in advance, and transfer from the transmission specifications that can be provided by the corresponding transmission system. Define several specification levels (transmission specification classifications) that can efficiently use the system according to the requirements, and define transmission specification classifications. Can be defined). Examples are shown below.

一方、適用可能な伝送システムを考慮しないで決定する場合、単純に伝送仕様となる要件パラメータ（通過ノード数、伝送距離、ビットレート）を基準にすることで分類分けし、各分類の伝送仕様に応じた伝送システム（伝送リソースの組合せ）を設計する（このことにより、通信路設定サービスのサービス提供メニューと合わせた伝送仕様の分類分けが可能となる）。以下にその例を示した。

On the other hand, when deciding without considering applicable transmission systems, classification is made simply based on the requirement parameters (number of passing nodes, transmission distance, bit rate) as transmission specifications, and the transmission specifications for each classification are used. A corresponding transmission system (a combination of transmission resources) is designed (this makes it possible to classify transmission specifications in combination with a service provision menu of a communication path setting service). Examples are shown below.

以上のような伝送リソースの種別を分類する場合は、以下のような基準が想定される。

When classifying the types of transmission resources as described above, the following criteria are assumed.

● Transponder ・ Bit rate −10Gbps, 40Gbps, 100Gbps, etc. ・ Modulation system −DQ-PKSK, PQSK, etc. ● Multiplexer / Separator ・ Wavelength multiplexing interval −25GHz, 50GHz, 100GHz, etc. ・ Wavelength selectivity ● Amplifier ・ Amplification band −C -band, L-band, etc. -Fiber -Fiber standards -SMF, DSF, etc. -Single mode / multimode For example, a specific transmitter (DPQPSK, etc.)-A combination of receiver and DSF, L-band optical amplifier, etc. Set according to the transmission specifications that realize various combinations such as a combination of a specific transmitter, SMF, and C band amplifier.

  When determining the correspondence between several types of transmission systems with different performances and transmission specification classifications, transmission design can be applied based on the values of some or all items of transmission specification information, and applicable transmission systems. To decide. For the transmission design function, for example, the method described in Non-Patent Reference G.680 can be used. Using this technique, the transmission characteristics of the corresponding transmission system can be estimated. By applying the given transmission specifications to transmission systems corresponding to various transmission classifications sequentially, and selecting the transmission system with the lowest cost among the transmission systems that can obtain the transmission quality, the transmission specification classification corresponding to the transmission specifications Can be determined.

  Details of the present invention will be described by classifying into features at the time of communication network construction and features at the time of operation after communication network construction.

<Characteristics when building a communication network>
When constructing a transmission line, a communication network is constructed by the following network construction method, thereby eliminating an over-spec system and realizing a reduction in communication network construction cost.

  FIG. 3 shows an outline of a communication network construction procedure in the communication network construction system 100 of the present invention.

  In the present invention, the following network construction procedure is performed.

  Step 101) The communication network construction system 100 determines a node arrangement and an inter-node connection link so as to connect bases having a communication channel demand, and determines a physical topology of the communication network.

Step 102) The communication network construction system 100 or the operator determines the communication path pattern based on the determined physical topology and the demand prediction of the communication path setting between the bases. This information is stored in the communication channel demand database 400 and the transmission information database 300.
Examples of physical topology, communication channel demand, and communication channel pattern are shown in FIG.

  Step 103) The communication network construction system 100 refers to the transmission information database 300 and acquires transmission specification classification allocation information for the communication path pattern. Further, for each communication path pattern determined in step 102, the transmission specification classification definition of the transmission information database 300 is considered in consideration of the transmission specifications (maximum transmission distance, number of allowable passing nodes, transmission distance, bit rate) of the corresponding communication path. Based on the information, the communication network construction system 100 determines the transmission specification classification of the corresponding communication path pattern and the transmission system to be assigned.

  For example, as shown in FIG. 5, transmission specifications are associated with each communication path pattern, and equipment (transmission system) to be used for each transmission specification classification is determined.

  Step 104) The communication network construction system 100 transmits the communication path pattern, the transmission specification classification determined for each communication path pattern (transmission specification classification allocation information for the communication path pattern), and the information of the allocated transmission system to the transmission information database 300. Save to. The communication path pattern is defined by transmission specifications, path information, wavelength information to be used, and the like. The route information is defined by the nodes and links through which the communication path passes.

  Step 105) In the node through which the communication path passes, assignment of transmission specification classification is determined as one item of management information of the in-node components (input / output port, filter, attenuator) used by the communication path. The association between the node component and the transmission specification classification is registered in the transmission information database 300 and the transmission specification classification management function section 11 of the management control section 1 of the node device described later. As a result, a parameter control / monitoring function corresponding to the transmission specification classification can be realized.

  FIG. 6 shows an example in which a transmission specification classification is assigned to a node port assuming a communication path pattern.

  Step 106) Acquire node configuration element and transmission specification classification correspondence information registered in the transmission information database 300, and register the transmission specification registered in the output / input port of the node device to which the transmission specification classification is assigned according to the information. A transmission system corresponding to the classification is connected to construct a physical communication network. FIG. 7 shows a construction example of a communication network.

  This makes it possible to manage unified transmission specification classifications based on common standards, not just within a single node, but across the entire network, and connect the same transmission specification classifications across the entire communication network. Become. Furthermore, this makes it possible to minimize the pattern of the transmission system and to simplify the management of the transmission specification and the transmission system. Also, when controlling a communication network or a node device, it is possible to easily use a transmission system having a desired performance by specifying and controlling the transmission specification classification.

  Note that when a transmission system having different transmission specifications is mixed using a normal method without using the communication network construction method of the present invention, which transmission specifications are realized by the constituent elements of the node device as in the present invention. Therefore, there is no standard for determining whether it can be used, and complicated operations are required.

<Characteristics when operating a communication network>
When operating the transmission network, in a communication network connecting a plurality of transmission systems with different performances constructed by the communication network construction method by the communication network construction system 100 described above, determination of whether or not transmission of a desired route of the communication path to be set is possible, and Simplify management resource management. In the operation phase, communication path control operations such as communication path setting / deleting are performed using the operation system 200 of the invention provided with the resource information database 210 and the communication path setting function unit 220.

● Resource management method-
Since network resources implemented in the physical communication network have different availability depending on the communication path pattern (route and transmission specifications) to be set, resource information for each communication path pattern is filtered by filtering available resources for each transmission specification classification. Is stored in the resource management database for each transmission specification classification.

  In this way, by managing resources for each transmission specification classification, communication is compared with conventional communication network operation methods that manage simple link unit free resource (eg free wavelength channel) information that does not consider transmission specifications. The complexity of network management can be reduced. In the conventional method, after checking the free resource information of each link, an operator or a design system such as a transmission design system determines whether a desired transmission specification can be satisfied by setting a communication path using the free resource. I had to make a decision. On the other hand, when the method of the present invention is used, the operator can directly manage free resource information considering the transmission specifications from the beginning.

  For example, it is assumed that route # 1, route # 2 2 and route # 3 are assumed in the communication network as shown in FIG. Furthermore, when a 100 Gbpos communication path is set for the path # 3, it is assumed that optical transmission with guaranteed signal quality is impossible. On the other hand, when a 10 Gbps communication path is set, it is assumed that optical transmission is possible with any path ensuring signal quality. In this case, the paths that can be used, that is, the resources, are different depending on whether the 10 Gbps communication path is set or the 100 Gbps communication path is set. In the present invention, when the resources that can be used differ according to the transmission requirements in this way, the resource information database 210 is held for each requirement, and when the operator refers to the resource information, it cannot be used due to the transmission requirements of the communication channel to be set. By eliminating unnecessary resource information and presenting it to the operator, the operator's management operation can be reduced. In the case of the communication network of FIG. 8, in the conventional method, resource management that does not distinguish between the transmission specifications as shown in FIG. 9 is performed. On the other hand, in the method of the present invention, as shown in FIG. 10, a management method is adopted in which resources presented according to transmission specifications change. In FIG. 10, it is assumed that a 3-hop communication path cannot be set. Accordingly, a communication path route pattern that sets a communication path of 3 hops or more is filtered, and only a communication path setting pattern of less than 3 hops and its resources are output.

  If the communication network includes equipment that can only be used at one of the bit rates, such as an amplifier and a fiber, only resources with a pattern that does not use the unavailable equipment are presented to the operator. Accordingly, it is possible to prevent a communication path from being set to an incorrect path by using unusable equipment.

● Communication channel setting procedure Communication channel setting is performed according to the following procedure.

  1) Confirm by referring to the resource information database 210 in the communication path pattern designated by the communication path setting command from the operator command or the communication path control function unit 220.

  2) Check if there is a free resource on the desired route in the transmission specification classification to be used.

  3) When there is a free resource, the entire communication path is configured by transmitting a control command from the communication path control function unit 220 or the operator to the node device and changing the connection state in each node device configuring the communication path. .

[First Embodiment]
As a first embodiment, a description will be given of simplification of operations when bit rates are mixed.

  Multi-degree ROADM (ROADM with multiple routes) is connected, and high-bit-rate and low-bit-rate rings are mixed to form a communication network by mixing transmission systems with different transmission specifications in the same network. be able to.

  FIG. 11 shows an example of a transmission system according to the first embodiment of the present invention.

  The figure shows an example of a WDM (Wavelength Division Multiplexing) ring (40 wavelengths / fiber) for a high bit rate and a WDM ring (40 wavelengths / fiber) for a low bit rate in a topology configured with Multi-degree ROADM. Is shown.

  In this embodiment, it is assumed that transmission systems having different performances shown in Table 3 below are registered in the transmission information database 300.

通信網構築時には、図１１のように拠点１〜６を二つのリングの重ね合わせとなるように、各拠点にROADM＃１〜＃６を配備し、リング状にファイバで接続したトポロジを構成する。ノード間の距離は50kmとする。

At the time of construction of a communication network, ROADMs # 1 to # 6 are arranged at each base so that the bases 1 to 6 overlap each other as shown in FIG. . The distance between nodes is 50 km.

  In this topology, a communication path pattern is assumed in which a 10-Gbps communication path of one wavelength and a 100-Gbps communication path of one wavelength are set from each base.

In this communication path pattern, from each node,
1) Two adjacent nodes,
2) One diagonal node,
3) Adjacent nodes of two diagonal nodes,
10 Gbps and 100 Gbps communication path settings are assumed, and the following transmission specifications are assumed in each pattern (Table 4).

通信網構築システム１００は、上記の表４に記載の通信路パターンの伝送仕様と伝送情報データベース３００の伝送システムを比較し、通信路パターンの伝送仕様が満たされるように通信路パターンと伝送仕様分類の対応付けを行い（通信路パターンに対する伝送仕様分類の割当）、伝送情報データベース３００に保存する。（伝送仕様分類情報として伝送要件を分類情報として抽象化し、具体的な伝送リソースの性能情報を隠蔽することにより、後の運用時の情報管理の煩雑さを低減することができる。また、伝送情報データベース３００に保存することで、運用フェーズの時に、通信網構築時の分類形態を把握することができる。）
保存される情報の例を表５に示す。

The communication network construction system 100 compares the transmission specification of the communication path pattern shown in Table 4 above with the transmission system of the transmission information database 300, and the communication path pattern and the transmission specification classification so that the transmission specification of the communication path pattern is satisfied. (Assignment of transmission specification classifications to communication path patterns) is stored in the transmission information database 300. (By abstracting transmission requirements as classification information as transmission specification classification information and concealing specific transmission resource performance information, it is possible to reduce the complexity of information management during later operations. By storing in the database 300, it is possible to grasp the classification form at the time of construction of the communication network during the operation phase.)
An example of information to be stored is shown in Table 5.

また、本実施の形態のように、通信路パターンに適用する伝送仕様分類を決定する際、基準となる伝送仕様が限られた項目である場合（本例の場合、ビットレート）、基準となる項目で通信路パターンをまとめて分類し、伝送仕様分類を割当てることもできる（表６）。この場合データベースの管理情報を削減することができる。

Further, as in this embodiment, when determining the transmission specification classification to be applied to the communication path pattern, when the transmission specification serving as a reference is a limited item (in this example, the bit rate), the reference is used. It is also possible to categorize communication path patterns by item and assign transmission specification classifications (Table 6). In this case, database management information can be reduced.

次に、設定する通信路の経路を考慮し、通信路が通過する各ノードにおいて、各種ノード構成要素（ポート、トランスポンダ）に割当てる伝送仕様分類（ノード構成要素に対する伝送仕様分類割当情報）を決定し、伝送情報データベース３００に保存する。これにより、運用フェーズにおいてノード構成要素の接続状態を変更する際、どの構成要素がどの分類に所属するかを把握することができ、同一分類内に限ったノード構成要素の接続が可能となる。

Next, considering the path of the communication path to be set, at each node through which the communication path passes, determine the transmission specification classification (transmission specification classification allocation information for the node structural element) to be assigned to various node components (ports, transponders). And stored in the transmission information database 300. Thereby, when changing the connection state of the node components in the operation phase, it is possible to grasp which component belongs to which category, and it becomes possible to connect the node components only within the same category.

  FIG. 12 is an example of a node configuration according to the first embodiment of this invention.

  The nodes shown in FIG. 1 are SW function unit 10, Mux function unit 20, Demux function unit 30, input route (WDM) 40, output route (WDM) 50, input UNI port 60, output UNI port 70, transceiver ( It comprises node components of a transmission transponder (80) and a receiver (reception transponder) 90.

  Also, a transmission specification classification management function including a management control unit 1 that manages the state of the node component, receives and processes a control message from the operation system, and has a function of storing transmission specification classification information of each node component The unit 11 is provided. The SW function unit 10, the Mux function unit 20, and the Demux function unit 30 can be realized by using an optical switch (SW) such as a WSS (Wavelength Selectable Switch).

  Each component is managed as a node resource by the communication path control function unit. In the present invention, a predetermined transmission specification classification is assigned to each configuration request.

In this example, transmission specification classification A (10 Gbps) is assigned to each node component as follows:
Input route (WDM) # 1
Output route (WDM) # 1
Input UNI Port # 1 to # 2
Output UNI Port # 1 ~ # 2
Transceiver # 1 ~ # 2
Receiver # 1 ~ # 2
Transmission specification classification B (100Gbps)
Input route (WDM) # 2
Output route (WDM) # 2
Input UNI Port # 3 ~ # 5
Output UNI Port # 3 ~ # 5
Transceiver # 3 ~ # 5
Receiver # 3 ~ # 5
In addition, when the requirements for a plurality of transmission specification classifications are satisfied, it is possible to assign the same component to a plurality of classifications.

  As shown below (Table 7, Table 8, and Table 9), the resource information database 210 includes resource information (Table 7) when transmission specification classification is not considered, and resource information (table 7) when transmission specification classification is considered. 8, Table 9) is saved. Here, the link ID represents an identifier of a link connecting bases on the physical topology.

伝送仕様分類を考慮したリソース量を算出する場合、始点/終点のUNIトランスポンダ（トランシーバとレシーバペア）と終点のUNIトランスポンダの要件分類毎の数量カウントが必要になるため、経路パターンが毎にリソースを管理する。この際、リソース以下のパラメータの小さい方としてカウントされる。

When calculating the resource amount considering the transmission specification classification, it is necessary to count the quantity for each requirement classification of the start / end point UNI transponder (transceiver and receiver pair) and the end point UNI transponder. to manage. At this time, it is counted as the smaller of the parameters below the resource.

1) Number of wavelength channels that can be continuously secured end-to-end at each link on the corresponding route 2) Number of wavelength channels connectable to various transmission resources and node components belonging to the corresponding classification.
(Eg The total number of wavelengths of NNI routes that can be connected to transponder pairs belonging to the applicable classification of start point / end point.)

また、今回の実施の形態の例の場合、伝送仕様分類Bは伝送仕様分類Aより高性能の伝送仕様を実現する分類のため、オペレータの指定により伝送仕様分類Aの通信路も利用可能である。このような場合、伝送仕様分類Aに対しては、伝送分類Bのリソースを合算（カップリング）してカウントすることができる。このような、上位分類のリソースを合算した情報（表１０）についても伝送情報データベース３００に保存する。カップリングフラグ=ONの場合、合算するものとする。

In the case of the present embodiment, the transmission specification classification B is a classification that realizes a higher-performance transmission specification than the transmission specification classification A. Therefore, the communication path of the transmission specification classification A can also be used by the operator. . In such a case, for transmission specification classification A, the resources of transmission classification B can be summed (coupled) and counted. Such information (Table 10) obtained by adding up the higher-class resources is also stored in the transmission information database 300. When the coupling flag is ON, it is added up.

  Further, by specifying a flag in addition to the corresponding specification classification as a key for referring to the resource information database 210, it is possible to specify whether or not the resources of the higher classification are added up. (Thus, when there is a shortage of resources dedicated to requirement classification with poor performance, it is possible to collect resource information of high-performance classification with good performance that can be diverted to low-order classification.)

また、これらリソース情報は、システムに接続されたディスプレイ等に、伝送仕様分類ごとに表示させることができる。

These resource information can be displayed for each transmission specification classification on a display connected to the system.

  As a result, the operator can visually check the resource information for each transmission specification classification.

<Communication channel setting procedure>
In the operation system 200, based on the resource information for each transmission specification output from the resource information construction function unit 230, after confirming free resource information for setting the communication path specified by the specified transmission specification, the communication The path control function unit 220 connects the confirmed resources and performs control for communication path setting. Control is realized by transmitting a control command from the communication path control function unit 220 in the operation system 200 that manages the node to the ROADM. The communication channel setting is started by receiving a communication channel control command from the operator or another communication channel control function unit.

  The communication path control command includes path information of the communication path to be set. The communication path control function unit 220 extracts the path pattern information, and applies applicable transmission specification classifications based on the information in the transmission information database 300. To decide. Further, the resource information of the corresponding transmission specification classification is collected by referring to the resource information database 210.

  Based on the collected resource information, it is determined whether the requested communication path can be set.

  If it can be set, the communication path control function unit 220 sends a control message to the node device to set the communication path. At this time, the node components corresponding to the transmission specification classification of the communication channel to be set are connected to the transmission system based on the association information of the node component and the assigned transmission specification classification collected from the transmission information database 300. Set the node connection status. An end-to-end communication path is set by performing this control on all nodes used by the communication path.

  In this case, an example in which the communication path # 1 of the transmission specification classification A (10G) and the communication path b of the transmission specification classification B (100G) are set by the following paths will be described with reference to FIG.

Communication path # 1: ROADM # 1 → ROADM # 2
Communication path # 2: ROADM # 1 → ROADM # 2 → ROADM # 3 → ROADM # 4
First, in the operation system, based on the resource information for each transmission specification output by the resource information construction function unit 230, the communication channel # 1 of the transmission specification category A and the communication channel # 2 of the transmission specification category B are set. Free resource information is confirmed. Thereafter, the communication path control function unit 220 sets the communication path # 1 and the communication path # 2 by transmitting a control message to the node device.

  The procedure for setting channel # 1 is shown below.

  The management controller 1 executes the following control for each node.

ROADM # 1
• Connect transceiver # 1 and input UNIPort # 1.

    • Connect input UNI Port # 1 and output route # 1.

ROADM # 2
• Connect input route # 1 and output UNI Port # 1.

    ・ Connect output UNI Port # 1 and receiver # 1.

  The procedure for setting channel # 2 is shown below.

  The management controller 1 executes the following control for each node.

ROADM # 1
・ Connect transceiver # 3 and input UNIPort # 3.

    ・ Connect input UNI Port # 3 and output route # 2.

ROADM # 2
・ Connect input route # 2 and output route # 2.

ROADM # 3
・ Connect input route # 2 and output route # 2.

ROADM # 4
・ Connect input route # 2 and output UNI Port # 3.

    ・ Connect output UNI Port # 3 and receiver # 3.

When a topology in which isomorphous topologies realized by multi-path optical nodes such as multi-degree ROADM are multiplexed and operated for each transmission specification, the topology for each transmission specification is the same. For this reason, transmission specification classification and communication network resources can be associated with each other in terms of topology, and the complexity during operation can be further reduced as compared with other general topologies.
However, the embodiment of the present invention is not limited to the ring topology, and can be applied to any topology such as a mesh network or a ladder network.

  It is also possible to manage the transceiver and receiver as a transponder by integrating them.

  Further, the present invention is applicable regardless of whether the transvers and the receiver (transponder) are handled as node components or as a transmission system.

  Although the wavelength information is omitted from the communication path pattern information of the present embodiment, the communication path pattern information includes wavelength information.

[Second Embodiment]
In the present embodiment, a case of long distance and short distance multi-ring will be described.

  By connecting multi-degree ROADMs and mixing long-distance rings and short-distance rings, transmission systems with different transmission performances can be mixed in the same network to form a communication network.

  FIG. 14 shows an example of a transmission system according to the second embodiment of the present invention. This figure shows an example in which a long-distance WDM ring (40 wavelengths / fiber) and a short-distance WDM ring (40 wavelengths / fiber) are configured in a topology configured by a multi-degree ROADM.

  In this embodiment, it is assumed that the following transmission system information (Table 11) having different performance is registered in the transmission information database 300.

通信網構築時には、図１４のように拠点１〜６を二つのリングの重ね合わせとなるように、各拠点にROADMを配備し、リング状にファイバで接続したトポロジを構成する。ノード間の距離は50kmとする。

At the time of construction of the communication network, as shown in FIG. 14, ROADMs are arranged at the respective bases so that the bases 1 to 6 are overlapped with each other, and a topology in which the fibers are connected in a ring shape is configured. The distance between nodes is 50 km.

  In this topology, a communication path pattern is assumed in which a communication path of 10 Gbps is set for each wavelength with a full mesh from each base.

In this communication pattern, from each node,
1) Two adjacent nodes,
2) One diagonal node,
3) Adjacent nodes of two diagonal nodes,
For each pattern, the following transmission specifications (Table 12) are assumed.

上記の表１２に記載の通信路パターンの伝送仕様と伝送情報データベース３００の伝送システムを比較し、通信路パターンの伝送仕様が満たされるように通信路パターンと伝送仕様分類の対応付けを行い、この情報（表１３）を伝送情報データベース３００に保存する。（伝送仕様分類として、伝送リソースの情報を隠蔽することにより、後の運用時の情報管理の煩雑さを低減することができる。また、伝送情報データベース３００に保存することで、運用フェーズの時に、通信網構築時の分類形態を把握することができる。）

The transmission specifications of the communication path pattern described in Table 12 and the transmission system of the transmission information database 300 are compared, and the communication path pattern and the transmission specification classification are associated so that the transmission specifications of the communication path pattern are satisfied. Information (Table 13) is stored in the transmission information database 300. (By concealing the transmission resource information as the transmission specification classification, it is possible to reduce the complexity of information management at the time of subsequent operation. Also, by storing in the transmission information database 300, during the operation phase, (The classification form at the time of communication network construction can be grasped.)

次に、設定する通信路が通過する各ノードにおいて、各種ノード構成要素を各伝送仕様分類に割当てる。（これにより、運用フェーズにおいてノード構成要素の接続状態を変更する際、どの構成要素がどの分類に所属するかを把握することができ、同一分類内に限ったノード構成要素の接続が可能となる。)
また、複数の分類の要件が満たされている場合、複数の分類に同一構成要素を割当てることも可能である。

Next, in each node through which the communication channel to be set passes, various node components are assigned to each transmission specification classification. (Thus, when changing the connection status of node components in the operation phase, it is possible to know which component belongs to which category, and it is possible to connect node components only within the same category. .)
In addition, when the requirements for a plurality of classifications are satisfied, it is possible to assign the same component to the plurality of classifications.

  In this example, a transmission specification classification is assigned to each node component as follows.

Transmission specification classification A (10Gbps)
・ Input route (WDM) # 1
-Output route (WDM) # 1
・ Input UNI Port # 1 ~ # 2
・ Output UNI Port # 1 ~ # 2
・ Transceiver # 1 ~ # 2
・ Receiver # 1 ~ # 2
Transmission specification classification B (100Gbps)
・ Input route (WDM) # 2
-Output route (WDM) # 2
・ Input UNI Port # 3 ~ # 5
・ Output UNI Port # 3 ~ # 5
・ Transceiver # 3 ~ # 5
・ Receiver # 3 ~ # 5
The resource information database 210 stores the following wavelength resource information (Tables 14 to 16). Resource information when not considering transmission specification classification (Table 14) and resource information when considering transmission specification classification (Tables 15 and 16) are stored.

伝送仕様分類を考慮したリソース量を算出する場合、始点／終点のUNIトランスポンダと終点のUNIトランスポンダの要件分類毎の数量カウントが必要になるため、経路パターンが毎にリソースを管理する。この際、リソース以下のパラメータの小さい方としてカウントされる。

When calculating the resource amount in consideration of the transmission specification classification, it is necessary to count the quantity for each requirement classification of the start point / end point UNI transponder and the end point UNI transponder. At this time, it is counted as the smaller of the parameters below the resource.

1) Number of wavelength channels that can be continuously secured end-to-end at each link on the corresponding route 2) Number of wavelength channels connectable to various transmission resources and node components belonging to the corresponding classification.
(Eg Total number of wavelengths of NNI links that can be connected to transponder pairs belonging to the applicable classification of start point / end point.)

また、今回の実施の形態の場合、伝送仕様分類Ｂは伝送仕様分類Ａより高性能の伝送仕様を実現する分類のため、オペレータの指定により伝送仕様分類Aの通信路も利用可能である。このような場合、伝送仕様分類Ａに対しては、伝送分類Bのリソースを合算（カップリング）してカウントすることができる。このような、上位分類のリソースを合算した情報（表１６）についてもリソース情報データベース２１０に保存する。カップリングフラグ=ONの場合、合算するものとする。

In the present embodiment, since the transmission specification classification B is a classification that realizes a higher-performance transmission specification than the transmission specification classification A, the communication path of the transmission specification classification A can also be used by the operator's designation. In such a case, for transmission specification classification A, the resources of transmission classification B can be summed (coupled) and counted. Information (Table 16) obtained by adding up the higher-class resources is also stored in the resource information database 210. When the coupling flag is ON, it is added up.

  Further, when referring to the resource information database 210, it is possible to specify whether or not to add up the resources of the higher classification by specifying a flag in addition to the corresponding requirement classification. (Thus, when there is a shortage of resources dedicated to requirement classification with poor performance, it is possible to collect resource information of high-performance classification with good performance that can be diverted to low-order classification.)

また、これらリソース情報は、システムに接続されたディスプレイ等に、伝送仕様分類ごとに表示させることができる。

These resource information can be displayed for each transmission specification classification on a display connected to the system.

  As a result, the operator can visually check the resource information for each transmission specification classification.

<Communication channel setting procedure>
The communication path setting control is realized by transmitting a control command to the ROADM from a control system (such as a network OPS) that manages the nodes. The communication channel setting is started by receiving a communication channel control command from the operator or another communication channel control function unit.

  The communication path control command includes the path information of the communication path to be set. The communication path control function unit 220 of the operation system 200 extracts the path pattern information and sets applicable transmission specification classifications in the transmission information database 300. Determine based on the information. Further, the resource information of the corresponding transmission specification classification is collected by referring to the resource information database 210.

  Based on the collected resource information, it is determined whether the requested communication path can be set.

  If it can be set, the communication path control function unit 220 sends a control message to the node device to set the communication path. At this time, the node components corresponding to the transmission specification classification of the communication channel to be set are connected to the transmission system based on the association information of the node component and the assigned transmission specification classification collected from the transmission information database 300. Set the node connection status. An end-to-end communication path is set by performing this control on all nodes used by the communication path.

  In this case, an example in which the communication path # 1 of the transmission specification classification A and the communication path # 2 of the transmission specification classification B are set by the following paths will be described.

Communication path # 1: ROADM # 1 → ROADM # 2
Communication path # 2: ROADM # 3 → ROADM # 4 → ROADM # 5 → ROADM # 6
The procedure for setting channel # 1 is shown below.

  The communication path control function unit 220 executes the following control for each node.

ROADM # 1
• Connect transceiver # 1 and input UNI Port # 1.

    • Connect input UNI Port # 1 and output route # 1.

ROADM # 2
• Connect input route # 1 and output UNI Port # 1.

    ・ Connect output UNI Port # 1 and receiver # 1.

  The procedure for setting channel # 2 is shown below.

  The communication path control function unit 220 executes the following control for each node.

ROADM # 3
・ Connect transceiver # 3 and input UNI Port # 3.

    ・ Connect input UNI Port # 3 and output route # 2.

ROADM # 4
・ Connect input route # 2 and output route # 2.

ROADM # 5
・ Connect input route # 2 and output route # 2.

ROADM # 6
・ Connect input route # 2 and output UNI Port # 3.

    ・ Connect output UNI Port # 3 and receiver # 3.

When multiple topologies having the same topology realized by the optical node on the other path such as Multi-degree ROADM are operated separately for each transmission specification, the topology for each transmission specification is the same. For this reason, transmission specification classification and communication network resources can be associated with each other in terms of topology, and the complexity during operation can be further reduced as compared with other general topologies.
However, the embodiment of the present invention is not limited to the ring topology, and can be applied to any topology such as a mesh network or a ladder network.

  It is also possible to manage the transceiver and receiver as a transponder by integrating them.

  Further, the present invention is applicable regardless of whether the transvers and the receiver (transponder) are handled as node components or as a transmission system.

  Although the wavelength information is omitted from the communication path pattern information of the present embodiment, the communication path pattern information includes wavelength information.

[Third Embodiment]
The first embodiment is an example in which the correspondence between the communication path pattern and the transmission specification classification is determined according to the transmission bit rate. In the second embodiment, the communication path pattern and the transmission specification classification are based on the transmission distance. In this example, transmission specification classifications are associated with each other depending on the combination pattern of the bit rate and the transmission distance, and communication equivalent to that in the first embodiment and the second embodiment is performed. The network can be constructed and operated. For example, the following classification is possible.

［第４の実施の形態］
図１５は、本発明の第４の実施の形態における伝送システムの例を示す。

[Fourth Embodiment]
FIG. 15 shows an example of a transmission system in the fourth embodiment of the present invention.

  As shown in FIG. 15, the present invention can also be implemented in a form in which a control plane function 601 such as GMPLS is installed in each node device, and the control function of each node operates autonomously and distributedly. The procedure up to the resource confirmation of the communication network to be set can use the same method as in the first to third embodiments.

  The control plane function 601 of each node is configured by being connected via a control plane communication network.

  When autonomous distributed control is used, it is possible to automatically collect resource information, and since communication channel setting is also performed autonomously distributed, a control command from the communication channel control function unit 220 for opening the communication channel is issued. It can be simplified.

  The function of collecting resources autonomously can be realized by using a routing protocol such as OSPF-TE, ISIS, BGP. In the present invention, in order to perform resource management for each transmission specification level according to the transmission specification classification, transmission specification classification information is added to the resource advertisement message of the routing protocol, and the resource information database 210 (link) is provided for each transmission specification classification. State database) is built.

  The communication path setting function unit 220 can be realized by using RSVP-TE. At this time, communication path specification classification information is added to the RSVP-TE protocol message. Communication channel specification classification information is attached to a message (such as a Path message), and in a node device that has received the message, it is possible to determine which intra-node component is a control target, and match the transmission specification classification Communication path connection can be performed.

[Fifth Embodiment]
FIG. 16 shows an example of a node configuration in the case where multiplexers / demultiplexers having different wavelength intervals are mixed in the fifth embodiment of the present invention.

  In the present invention, multiplexers 21 and 22 and separators 31 and 32 having different wavelength grids are mixed in a node as shown in FIG. 16, and transmission resources are classified based on wavelength interval information as shown in FIG. A net can be constructed. In the node device of FIG. 17, elements having different wavelength intervals are used for the Mux function units 21 and 22 and the Demux function units 31 and 32 configured by multiplexers / separators such as AWG and WSS. Further, in consideration of the wavelength interval of the Mux function units 21 and 22 and the Demux function units 31 and 32 and the transmission specification requirement of the set communication path, the Mux function unit 21, By connecting a transponder, a transmission line, an amplifier, and the like that match the wavelength interval between the 22 and the Demux function units 31 and 32, it is possible to separate communication network resources according to the wavelength interval. By separating communication networks by wavelength intervals in this way, resources with wide wavelength intervals are applied to high bit rate communication channels with strict transmission requirements, and wavelength intervals are short for low bit rate communication channels with less strict transmission requirements. By applying resources, it is possible to mix communication channels with different bit rates in the same WDM network while efficiently using fiber frequency resources.

  In this case, instead of using elements with a wide wavelength interval, an element with a wide wavelength interval is effectively realized by selectively using a wavelength grid of elements with a narrow wavelength interval (for example, every other wavelength). May be.

[Sixth Embodiment]
Further, instead of the transmission specification classification, it is also possible to define classification information (client classification) by the client attribute using the communication network and construct a similar communication network.

  Here, the client classification is the following information.

・ SLA requested by client
Request reliability, request delay, etc.
Ethernet (registered trademark), MPLS-TP, PBB-TE, SDH / SONET, OTN (including ODU), IP, Fiber Channel, etc. ・ User information User ID, customer ID, etc. This can be realized by configuring the principle configuration of the present invention as shown in FIG.
In addition, by applying the coupling as described in the first embodiment, it is possible for a plurality of clients to share the same resource.

  Conventionally, an optical communication network is prepared for each client attribute to construct an entire communication network. However, by applying the present invention, it becomes possible to provide an optical communication network in a unified manner to a plurality of client communication networks having different attributes, so that the management operation for each of the plurality of clients can be reduced. In addition, since equipment is shared by a plurality of clients, equipment costs can be reduced.

  Also, even when clients with different client attributes are accommodated in the same network, by separating the node components and transmission paths for each client attribute, different failure recovery methods can be applied to each of them, and the equipment can be installed independently. Can be expanded, renewed or relocated.

  FIG. 19 shows an example in which the ODU client and the Ethernet client are accommodated in the same network by the client network method. In the transfer network, the data may be transferred in the same signal format as that of the client, or may be transferred after being converted into a different signal format such as any container defined by OTN.

  In this case, assuming the node of FIG. 12, the node components can be classified as follows, for example.

Client attribute A (ODU)
・ Input route (WDM) # 1
-Output route (WDM) # 1
・ Input UNI Port # 1 ~ # 2
・ Output UNI Port # 1 ~ # 2
・ Transceiver # 1 ~ # 2
・ Receiver # 1 ~ # 2
Transmission specification classification B (Ethernet (registered trademark))
・ Input route (WDM) # 2
-Output route (WDM) # 2
・ Input UNI Port # 3 ~ # 5
・ Output UNI Port # 3 ~ # 5
・ Transceiver # 3 ~ # 5
・ Receiver # 3 ~ # 5
[Seventh Embodiment]
In addition, according to the present invention, the transmission specification classifications or client attribute classifications of the first to sixth embodiments described above can be assigned to virtual links generated on a physical topology. Here, the virtual link is a link on the control that is abstracted by using the communication path set by the above-described method as a link connecting the start point and the end point of the communication path to the upper layer, the user, and the operator. For example, a label switched path, a TE-Link (Traffic Engineering Link), or a FA-LSP (Forwarding Adjacency LSP) generated by a control protocol such as GMPLS is applicable.

In this case, a communication path corresponding to the transmission specification classification is generated in advance by the same method as in the above first to fifth, and a virtual link is generated on the system. In the case of a virtual link, it is not necessary for each component of the node to be actually connected, and it may be in a reserved state by the control device.
For example, assuming an example equivalent to the first embodiment, a virtual link as shown in Table 19 below corresponding to the communication path # 1 and the communication path # 2 is generated. The topology of the virtual link is as shown in FIG. (If there are many communication channels to be used, more virtual links may be set.)

仮想リンクには伝送仕様分類が付与されているため、運用システムは伝送仕様分類で仮想リンクをフィルタリングし、伝送仕様分類毎に、オペレータに通信網の仮想トポロジを表示することができる。また、各ノードの構成要素の伝送分類等や経路パターンを考慮して作業を行う必要性がなくなり、単純に所望の伝送仕様と、始点ノード、終点ノードの一致する仮想リンクを指定して運用することが可能になる。つまり、実際に光信号を伝送できない経路パターンを排除し、伝送可能な経路パターンのみを直感的に把握できるようになる。さらに、オペレータは所望の伝送仕様分類を運用システムに入力することにより、簡単に利用可能なリソースを把握することが可能になる。これにより、オペレータの操作ミスの低減、操作時間の短縮が可能となる。

Since the transmission specification classification is assigned to the virtual link, the operation system can filter the virtual link by the transmission specification classification and display the virtual topology of the communication network to the operator for each transmission specification classification. In addition, there is no need to perform work in consideration of the transmission classification of each component of each node and the route pattern. Simply specify the desired transmission specification and the virtual link that matches the start and end nodes. It becomes possible. That is, it becomes possible to intuitively grasp only a path pattern that can be transmitted by eliminating a path pattern that cannot actually transmit an optical signal. Furthermore, the operator can easily grasp available resources by inputting a desired transmission specification classification into the operation system. As a result, it is possible to reduce the operator's operation mistakes and shorten the operation time.

  The present invention is not limited to the above-described embodiment, and various modifications and applications can be made within the scope of the claims.

DESCRIPTION OF SYMBOLS 1 Management control part 11 Transmission specification classification | category management functional part 20 Mux (optical multiplexing) functional part 21 Mux functional part (wide wavelength interval)
22 Mux function (narrow wavelength interval)
30 Demux (optical demultiplexing) functional unit 31 Demux functional unit (wide wavelength interval)
32 Demux function part (narrow wavelength interval)
40 Input route (WDM)
50 Output route (WDM)
60 input UNI
70 output UNI
80 Transceiver (Transmitting transponder)
90 receiver (receiving transponder)
DESCRIPTION OF SYMBOLS 100 Communication network construction system 200 Operation system 210 Resource information database, Resource information preservation | save means 220 Communication path control function part, Communication path control means 230 Resource information construction function part, Resource information construction means 300 Transmission information database 400 Communication path demand database 500 Light Communication network 600 Client attribute storage means 601 Control plane function

Claims (7)

In an optical communication network configured by connecting optical node devices and multiple types of transmission systems with different transmission specifications,
A communication network construction system having a function of determining classification information of transmission specifications when constructing a communication network, having a function of correlating with a node component, a communication path pattern, and a function of outputting the determined information;
An operation system comprising a resource information construction function for each transmission specification, a management function of the resource, and a communication network control function;
Common to the communication network construction system and the operation system, the transmission specification classification definition information, the correspondence information between the transmission specification classification information and the node component or the communication path pattern, and the available transmission system type information A transmission information database having a function of storing
With
According to the transmission specification classification information determined by the communication network construction system and stored in the transmission information database, and the association information between them and a node component or a communication path pattern, the operation system is connected to the optical node device. A control message including the information is transmitted, and a node corresponding to the transmission specification type information and a communication path corresponding to the specified transmission specification classification are configured by connecting the transmission system. Communication network. The operational system is
Means for acquiring transmission specification classification definition information, and correspondence information between the transmission specification classification information and a node component or a communication path pattern from an external storage device;
Data information that can be output by filtering only the communication network resources that can be used in the transmission specification and communication path pattern that are keyed from the resource information of the entire communication network using the transmission specification and the communication path pattern as a key. A resource information construction function means comprising a construction function;
A resource information database having a function of storing resource information constructed by the resource information construction function means;
The optical communication network according to claim 1, further comprising: The optical node device is:
Means for exchanging control messages with other nodes;
It includes means for setting a communication path with the same transmission specification type in each component node of the communication path by including the type information of the transmission specification of the path to be set in a signaling (communication path setting) message and notifying other nodes. Item 14. An optical communication network according to Item 1. The optical node device is:
Connection means for multiple types of transmission systems with different transmission specifications;
Means for receiving transmission specifications of node components and correspondence information of connected transmission systems;
Means for connecting the transmission system with a node component having a matching correspondence;
The optical communication network according to claim 1. A communication path setting method for setting a communication path in an optical communication network configured by connecting an optical node device and a plurality of types of transmission systems having different transmission specifications,
A communication network construction system having a function of determining classification information of transmission specifications when constructing a communication network, having a function of correlating with a node component, a communication path pattern, and a function of outputting the determined information;
An operation system comprising a resource information construction function for each transmission specification, a management function of the resource, and a communication network control function;
Common to the communication network construction system and the operation system, the transmission specification classification definition information, the correspondence information between the transmission specification classification information and the node component or the communication path pattern, and the available transmission system type information A transmission information database having a function of storing
In a communication system comprising:
The operation system obtains transmission specification classification information from the transmission information database, and association information between them and a node component or a communication path pattern;
Including the information acquired from the transmission information database in the optical node device by the operation system, the node configuration elements with the same transmission specification type information and the control message for connecting the transmission system are sent to the node device to set the communication path And steps to
A communication path setting method comprising: An optical communication network management system having a management control function for grasping and controlling the state of a communication network in an optical communication network accommodating a plurality of different types of clients in an optical node device,
It has a management control device that configures a communication path by attaching client attribute classification information to the constituent elements of the optical node device and the transmission system, and connecting the constituent elements that match the client classification information and the transmission system. An optical communication network management system. An operation system in an optical communication network configured by connecting an optical node device and a plurality of types of transmission systems having different transmission specifications,
Means for acquiring from the external storage device the definition information of the transmission specification classification, and the correspondence information between the transmission specification classification information and the node component or the communication path pattern;
Data information that can be output by filtering only the communication network resources that can be used in the transmission specification and communication path pattern that are keyed from the resource information of the entire communication network using the transmission specification and the communication path pattern as a key. A resource information construction function means comprising a construction function;
A resource information database having a function of storing resource information constructed by the resource information construction function means;
A control message is transmitted to the optical node device of the communication network for the transmission specifications and communication network resources that can be used for each transmission path pattern constructed by the resource information construction function means, and the components of each node device are set in a reserved state. A communication path control function means;
An operation system characterized by comprising:

Images