JP3639107B2 - Automatic setting method for logically multiplexed transmission network - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an automatic setting method for a logically multiplexed transmission line network, and more particularly to a VP (Virtual Path) network automatic setting method in an asynchronous transfer mode (ATM) communication network.
[0002]
[Prior art]
In ATM communication networks and packet communication networks, transmission information is divided into cell and packet transmission units, and a logically multiplexed transmission line network is formed on a physical transmission network to logically multiplex the transmission units. . In call connection control, the logically multiplexed transmission path is exchanged / relayed by an exchange / cross-connect switch, and a communication path is set up with the target terminal.
[0003]
The logical multiplexing transmission path is a VC (Virtual Channel) corresponding to an actual communication path between terminals in an ATM communication network and a VP bundled together. In a packet communication network, a VC is a VC. (Virtual Call).
[0004]
[Problems to be solved by the invention]
In the conventional ATM communication network and packet communication network, the communication path is set at the time of call connection based on the transmission capacity determined based on traffic assumed in advance at the start of network operation. Therefore, it is likely that the best route cannot be selected due to an increase or fluctuation in traffic, and it is easy to increase the call processing load due to a delay due to detouring or an increase in the number of connection routes, or to increase the frequency of call loss.
[0005]
Conventionally, as a countermeasure, the network operation manager determines the reconfiguration of the logical multiplexing transmission path network based on the information obtained by the operation status monitoring, and instructs the call connection controller that performs call connection control. Finally, the logical multiplexing transmission path for operation management is re-established to configure a new logical multiplexing transmission path network. This series of procedures requires timely network operation manager intervention, but it is difficult to always respond, and it is not easy to maintain efficient operation of network resources.
[0006]
In particular, an ATM communication network is a communication network that can cope with multimedia communication. However, in the method of a distributed control architecture that has been proposed and realized in recent years, there is a problem of how to set a VP network. It has become.
Unlike conventional methods such as cross-connect connection by remote control, the present invention does not require constant network operation manager intervention and allocates resources that match traffic in a timely manner according to network resource usage. An object of the present invention is to provide an automatic setting system for a logically multiplexed transmission line network that is dynamically realized and enables efficient operation of network resources.
[0007]
[Means for Solving the Problems]
FIG. 1 is a block diagram showing the principle of the first aspect of the present invention.
The invention according to claim 1 is a communication network that divides transmission information into transmission units and forms a logically multiplexed transmission line network that logically multiplexes and transmits the transmission units on a physical transmission network. Call connection information used by a call connection controller, which is activated for each call connection and establishes a call connection in the logical multiplexing transmission line network, as a part of the call connection control. Information acquisition means 1 for acquiring call occurrence information and call connection history, taking the history of the acquired call connection information and call connection occurrence information, and increasing the connection route based on the history and traffic evaluation standard information The traffic observation evaluation means 2 for detecting a high-traffic connection route that requires traffic, and the number of connections in low traffic that can constitute the detected high-traffic connection route with reference to the configuration information of the physical transmission network An additional route determining means 3 for determining a combination of a few current connection routes, and waiting for a free state after blocking the determined current connection route, communicating with the switch of the end point node of each connection route, and a desired new connection After establishing a route and updating the call connection information used by the call connection controller, it comprises connection route expansion means 4 for releasing the blockage of the new connection route.
[0008]
That is, according to the first aspect of the present invention, the network operation management controller is provided so as to be responsible for part of call connection control performed by the call connection controller in the logical multiplexing transmission line network. At this time, the call connection controller is activated for each call connection, whereas the network operation management controller is activated at the start of (1) call connection control operation, and then automatically and periodically (2 (3) Activated at the request from the network operation manager, (3) Activated at the request of the call connection controller for each call connection, (4) Activated by a combination of (1) to (3). The network operation management controller and the call connection controller may be the same node or different nodes.
[0009]
In the activated network operation management controller, in parallel with the call connection processing, first, the information acquisition unit 1 uses the call connection information used by the call connection controller at the time of call connection control and the occurrence information in the call connection (hereinafter referred to as “call connection information”). "Call connection related information"). This acquisition method includes a method in which each information is shared information of each controller, a function unit that manages each information, and a method in which each controller requests information reference setting to this function unit.
[0010]
Next, the traffic observation evaluation unit 2 detects a connection route with high traffic that requires an additional connection route based on the acquired history of call connection related information and traffic evaluation reference information, and the additional route determination unit 3 performs physical transmission. With reference to network configuration information, a combination of current connection routes with a low traffic and a small number of connections that can form the detected high traffic connection route is determined.
[0011]
Then, the connection route extension means 4 waits for the vacant state after blocking the determined current connection route, communicates with the switch of the end point node of each connection route to establish a desired new connection route, and the call connection After the call connection information used by the controller is updated, the new connection route is unblocked and used for actual call connection control of the call connection controller.
[0012]
In other words, the network connection route can be reconfigured automatically following the increase in traffic without the intervention of the network operation manager, and can be used.
According to a second aspect of the present invention, in the automatic setting system for the logical multiplexing transmission line network according to the first aspect, the connection route extension means 4 adds the combination of the connection routes to the determined current connection route. When there is a spare connection route, priority is given to the selection of the spare connection route without executing the blockage and waiting for a free state.
[0013]
That is, in the invention described in claim 2, when there is a spare connection route, the connection route extension means 4 preferentially selects it. As a result, in order to redirect the current connection route to another route, it is necessary to capture the current route once, but the spare connection route is not used at all. It becomes unnecessary and simplifies the network reconfiguration procedure.
[0014]
According to a third aspect of the present invention, in the automatic setting method of the logical multiplexing transmission line network according to the first aspect, the extension route determining means 3 is configured such that the current connection route cannot be used as it is. Select a low-traffic connection route that partially matches the route, wait for a free state after blocking the connection route, communicate with an appropriate switch, and use the partial connection route and other partial connection routes to be used. A combination of the partial connection route used by the former and other working connection routes is determined, and the other partial connection routes of the latter are determined as individual new connection routes.
[0015]
That is, in the invention according to claim 3, the extension route determination means 3 uses a partially matching low traffic connection route on the target route when the current connection route cannot be used as it is. Separate the connection route and other partial connection routes, and set each as a part of the expansion route. As a result, more detailed route setting can be performed, and resources can be redistributed optimally.
[0016]
The invention according to claim 4 refers to the traffic evaluation reference information used by the traffic observation evaluation means 2 and the additional route determination means 3 in the logical multiplexing transmission line network automatic setting system according to claim 1 The configuration information of the physical transmission network is input from the network operation manager in a timely manner.
That is, in the invention according to claim 4, the operation state can be changed from the network operation manager.
[0017]
According to the fifth aspect of the present invention, in the automatic setting method for the logical multiplexing transmission line network according to the fourth aspect, each information of the traffic evaluation reference information and the physical transmission network configuration information appropriately input by the network operation manager is obtained. An information update means for receiving and updating old information to new information is provided.
That is, in the invention described in claim 5, the traffic evaluation standard information and physical transmission network configuration information transmitted from the network operation manager can be updated and used. Therefore, the network operation manager can change and set the operation state of the network as appropriate.
[0018]
According to a sixth aspect of the present invention, in the automatic setting system for the logical multiplexing transmission line network according to the first aspect, the communication network is an ATM communication network, and the logical multiplexing transmission line network is VP. It is a (virtual path) network, and the connection route is a VPC (virtual path connection).
That is, in the invention described in claim 6, the VP network in the ATM communication network can be automatically set.
[0019]
The invention according to claim 7 is the logical multiplexing transmission line network automatic setting method according to claim 6, wherein the communication network is subject to call connection control with the first communication network for inter-node communication. A second communication network, and the first communication network includes a first node accommodating a handler for controlling switching of VP / VC constituting the second communication network and a call in a predetermined area of the second communication network. A second node accommodating a call connection controller for establishing a connection, and these nodes communicate with each other via the first communication network to realize call connection control of the second communication network. An operation management controller is provided for each predetermined area of the second communication network.
[0020]
That is, in the invention according to claim 7, in the method of the distributed control architecture that has been proposed and realized in recent years, the network operation management controller is connected to the call connection related to the call connection controller in a predetermined area of the second communication network. Information can be obtained and automatically corrected, changed, reconfigured, etc., and used for call connection control of the call connection controller.
[0021]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 2 is a configuration example of an embodiment corresponding to claims 1 to 7. The present embodiment is an example applied to a method for executing call connection control of an ATM communication network in a distributed environment on a distributed control architecture. A method of executing this call connection control in a distributed environment on a distributed control architecture is a method that has been proposed and is being realized in recent years. First, the outline of the method using this distributed control architecture will be described.
[0022]
In FIG. 2, a communication network 12 is a call connection control target communication network, and a communication network 11 is a communication network for inter-node communication. The communication network 11 includes a node 13 that accommodates a call connection APL (call connection application) (hereinafter “call connection APL 13”), a node 14 that accommodates an operation management APL (operation management application) (hereinafter “operation management APL 14”), A node 15 (hereinafter referred to as “call connection controller (CPCC) 15”) accommodating a call connection controller (CPCC) and a switch node 17 accommodating VPH and VCH are connected. These are functional parts that originally constitute an ATM switch, but are individually extracted and distributed on the communication network 11 as one node.
[0023]
Each of these nodes communicates with each other via the communication network 11 forming a distributed environment, realizes each function without being conscious of distribution, and forms a single control system as a whole.
[0024]
At that time, the call connection controller (CPCC) 15 overlooks a certain management area of the communication network 12 and communicates with the switch node 17 via the communication network 11, and the switch node 17 controls the switch of the communication network 12. Thus, call connection control of the communication network 12 is realized. Accordingly, there are generally as many switch nodes 17 as the number of switches. In the switch node 17, VPH is a VP handler that performs virtual path (VP) switching, and VCH is a VC handler that performs virtual channel (VC) switching.
[0025]
Here, at the time of call connection, the call connection controller (CPCC) 15 finally communicates with a necessary and sufficient number of VCHs to generate a virtual channel connection (VCC: Virtual Channel Connection) between the end terminals, At the time of network operation management, a virtual path connection (VPC) is generated by communicating with a necessary and sufficient number of VPHs according to the instruction information transmitted from the network operation manager.
[0026]
In short, the information necessary for the call connection controller (CPCC) 15 includes a VP network configuration and VPC usage management in units of VPCs for routing and channel resource selection. For management, only part of the above VPC usage status management requires information on releasing the blocking setting and occurrence information on the call connection, and the VP network configuration information and the VPC usage status management information are used as some means. VP network can be automatically reconfigured if it can be updated by reference.
[0027]
Therefore, in the present embodiment, a node 16 that accommodates a network operation management controller (OMCC) in the communication network 11 is assumed to share part of the call connection control performed by the call connection controller (CPCC) 15. (Hereinafter referred to as “network operation management controller (OMCC) 16”). Although the network operation management controller (OMCC) 16 is an independent node in the illustrated example, it may coexist in the same node as the call connection controller (CPCC) 15.
[0028]
The network operation management controller (OMCC) 16 includes functional units that are made up of a traffic observation evaluation unit 61, a VPC extension route determination unit 62, a VPC extension unit 63, and an information update unit 64.
The network operation management controller (OMCC) 16 is provided for each predetermined management area of the communication network 12, acquires call connection related information used by the call connection controller (CPCC) 15 in the predetermined management area, and manages the network operation management. The VP network is reconfigured based on information input by the user as appropriate. In the reconfiguration of the VP network, communication with the VPH arranged in the switch node 17 is performed via the communication network 11. Therefore, the network operation management controller (OMCC) 16 is provided with a memory for storing such information.
[0029]
As shown in FIG. 5, the call connection related information 80 used by the call connection controller (CPCC) 15 includes call connection occurrence information (CPED: Call Process Event Data) 81 and VP network configuration information (VPTD: Virtual Path Topology Data). ) 82, VPC usage status management information (VPUD: Virtual Path Usage Data) 83, and VPC network blockage setting release information (VPBD: Virtual Path Block Data) 84. Note that examples of the call connection occurrence information (CPED) 81 include a VPC (including a VP link; the same applies hereinafter) in which a channel of a required band could not be secured, a path where a call loss has occurred, and the like.
[0030]
Further, as shown in FIG. 5, information input by the network operation manager as appropriate is traffic evaluation standard information (EVCD: Evaluation Criteria Data) 91 and physical network configuration information (PHTD: Physical Topology Data) 92. In the network operation management controller (OMCC) 16, these are given to the information update unit 64 and updated and stored. The traffic evaluation reference information (EVCD) 91 is information representing a reference value for evaluating the degree of traffic. This includes the resource block corresponding to the call connection occurrence information (CPED) 81, the frequency of call loss, the VP resource usage corresponding to the VPC usage status management information (VPUD) 83, and the stability of traffic level judgment. The minimum determination interval for the same determination target for guaranteeing is included. The physical network configuration information (PHTD) 92 is information describing the physical connection relationship of the switches constituting the communication network to be covered. This includes the path between any switch and the VP link between adjacent switches.
[0031]
The traffic observation evaluation unit 61 refers to the call connection occurrence information (CPED) 81, the VPC usage status management information (VPUD) 83, and the VPC blockage setting release information (VPBD) 84 as shown in FIG. The data is stored, and the traffic evaluation standard information (EVCD) 91 is referred to and output to the VPC extension route determination unit 62.
[0032]
As shown in FIG. 5, the VPC extension route determination unit 62 receives the output of the traffic observation evaluation unit 61, refers to physical network configuration information (PHTD) 92, and stores VPC configuration information (VPCD: Virtual Path Configuration Data) 93. Read / write is performed and output to the VPC extension unit 63. The VPC configuration information (VPCD) 93 is information describing the configuration of the VPC. This includes a switch constituting the VPC and a VP link between adjacent switches. The VPC configuration information (VPCD) 93 is stored in an independent memory or a memory provided in either the VPC expansion route determination unit 62 or the VPC expansion unit 63.
[0033]
As shown in FIG. 5, the VPC extension unit 63 receives the output of the VPC extension route determination unit 62, writes the VP network configuration information (VPTD) 82 of the call connection related information 80, and VPC usage status management information (VPUD). ) 83 is read and written, VPC blockage setting release information (VPBD) 84 is updated, VPC configuration information (VPCD) 93 is written, and the VP handler (VPH) of switch node 17 is communicated.
[0034]
As shown in FIG. 5, the information updating unit 64 updates and updates the traffic evaluation criteria information (EVCD) 91 and physical network configuration information (PHTD) 92 each time it is transmitted from the network operation manager. The traffic evaluation reference information (EVCD) 91 is given to the traffic observation evaluation unit 61, and the updated VPC configuration information (VPCD) 93 is given to the VPC expansion route determination unit 62.
[0035]
The correspondence between the above configuration and the claims is as follows. The call connection controller (CPCC) 15 corresponds to the call connection controller. The network operation management controller (OMCC) 16 corresponds to the network operation management controller. The information acquisition means 1 corresponds to a traffic observation evaluation unit 61 and a VPC expansion unit 63. A traffic observation evaluation unit 61 corresponds to the traffic observation evaluation means 2. The VPC expansion route determination unit 62 corresponds to the expansion route determination means 3. A VPC expansion unit 63 corresponds to the connection route expansion means 4. The information update unit 64 corresponds to the information update means.
[0036]
The call connection information corresponds to VP network configuration information (VPTD) 82, VPC usage status management information (VPUD) 83, and VPC blockage setting release information (VPBD) 84 shown in FIG. The call connection occurrence information (CPED) 81 shown in FIG. 5 corresponds to the call connection occurrence information. The traffic evaluation standard information (EVCD) 91 shown in FIG. 5 corresponds to the traffic evaluation standard information input by the network operation manager. The physical network configuration information (PHTD) 92 shown in FIG. 5 corresponds to the physical network configuration information input by the network operation manager.
[0037]
The communication network 11 corresponds to the first communication network. The communication network 12 corresponds to the second communication network. The switch node 17 corresponds to the first node. A call connection controller (CPCC) 15 corresponds to the second node.
The operation of this embodiment will be described below with reference to FIGS. FIG. 3 shows an example of a physical network using a VP link recognized by the network operation management controller (OMCC) 16. In FIG. 3, when there are four switches A, B, C, and D on the physical network, the network operation management controller (OMCC) 16 recognizes connection paths between the four switches.
[0038]
FIG. 4 is an example of a VPC (including VP link) network from the switch A to the switch D. In FIG. 4, the network operation management controller (OMCC) 16 includes a connection path from the switch A directly to the switch D, a connection path in which the switch C is VP-connected through the switch A → switch C → switch D path, and the switch A → A connection path in which the switch C and the switch B are VP-connected through the path of the switch C → the switch B → the switch D is configured as a VPC from the switch A to the switch D. The call connection controller (CPCC) 15 recognizes these VPCs as VPCs (individual differences are attributes) from the switch A to the switch D, and does not sense the configuration of the physical network in FIG.
[0039]
FIG. 5 is an operation explanatory diagram. FIG. 5 shows a series of operations between the functional units of the network operation management controller (OMCC) 16 and other functional units, which appear when the physical distribution is hidden by the distributed processing environment.
In FIG. 5, the call connection controller (CPCC) 15 is activated for each call connection. On the other hand, the network operation management controller (OMCC) 16 is activated at the start of (1) call connection control operation, and then automatically and periodically, and (2) activated when requested by the network operation manager. (3) Activated at the request of the call connection controller for each call connection. (4) Activated by a combination of (1) to (3).
[0040]
The activated network operation management controller (OMCC) 16 performs the interaction of the traffic observation evaluation unit 61, the VPC extension route determination unit 62, and the VPC extension unit 63 in parallel with the call connection processing of the call connection controller (CPCC) 15. Then, a new VPC is re-established on a route with high traffic that requires additional VPC by using the existing low-traffic VPC, and is used for call connection control of the call connection controller (CPCC) 15.
[0041]
This will be specifically described below. Between the call connection controller (CPCC) 15 and the network operation management controller (OMCC) 16, call connection occurrence information (CPED) 81, VP network configuration information (VPTD) 82, VPC usage status management information (VPUD) 83, VPC The call connection related information 80 including each piece of the block setting release information (VPBD) 84 is used.
[0042]
As a method of sharing the call connection related information 80 by both the call connection controller (CPCC) 15 and the network operation management controller (OMCC) 16, each information is stored in the call connection controller (CPCC) 15 and the network operation management controller (OMCC). 16 sharing information, and a function unit for managing each information, and a method in which the call connection controller (CPCC) 15 and the network operation management controller (OMCC) 16 request information reference setting in this function unit. There can be various forms.
[0043]
The information update function unit 64 of the network operation management controller (OMCC) 16 receives the traffic evaluation standard information (EVCD) 91 and the physical network configuration information (PHTD) 92 that are appropriately input by the network operation manager, The traffic evaluation criteria information (EVCD) 91 updated, stored, and updated this time is used as a reference for the traffic observation evaluation function unit 61, and the updated physical network configuration information (PHTD) 92 is used as the VPC extension route determination function unit 62. Use for reference.
[0044]
The traffic observation evaluation unit 61 repeatedly obtains call connection occurrence information (CPED) 81, VPC usage status management information (VPUD) 83, and VPC blockage setting release information (VPBD) 84, and a route formed by a combination of each VPC and VPC. (Hereinafter, both are collectively referred to as “route”, and the route is expressed by a combination of a start switch and an end switch), and history information 611 related to traffic is accumulated.
[0045]
If the VPC in the history is not in the VPC usage status management information (VPUD) 83 or the VPC blockage setting release information (VPBD) 84, the VPC information is deleted. The history information here is the frequency of resource blocks due to a change in the bandwidth usage of the route or a lack of bandwidth when securing a channel. The opportunity to obtain call connection occurrence information (CPED) 81, VPC usage status management information (VPUD) 83, and VPC blockage setting release information (VPBD) 84 depends on the activation method of the traffic observation evaluation function unit 61.
[0046]
The traffic observation evaluation unit 61 takes in the traffic evaluation reference information (EVCD) 91 transmitted from the network operation manager from the information update unit 64, collates it with the accumulated traffic history information 611, and performs the following two operations. .
(1) A route for high traffic is obtained and selected and passed to the VPC expansion route determination unit 62. This route may be a single VPC, but in any case, the route is identified by a set of switches at both ends, and does not depend on any intervening switches. Here, the switches A to D shown in FIGS. 3 and 4 are used.
[0047]
(2) A VPC that has become low traffic or a VPC that has ceased to have low traffic is detected, and VPC information relating to such low traffic is also passed to the VPC extension route determination unit 62.
The VPC extension route determination unit 62 records the VPC information relating to low traffic in the VPC configuration information (VPCD) 93, while reading the VPC configuration information (VPCD) 93 for the route information, and from the information update unit 64, the physical network Incorporating configuration information (PHTD) 92, referring to them, satisfying the route obtained by the traffic observation evaluation unit 61, and the traffic observation evaluation unit 61 has evaluated that the traffic is low, the traffic is lower and the number of connections is smaller. A combination of VPCs is selected and transferred to the VPC expansion unit 63. Here, it is assumed that the switches A to C to D in FIGS. 3 and 4 are selected. Note that there is a method for obtaining and selecting a candidate, for example, a method of obtaining a lower traffic VPC combination having a smaller number of switch stages, and the number of candidates is determined in consideration of processing capability.
[0048]
However, if there is a spare VPC with reference to the VPC configuration information (VPCD) 93, the VPC extension route determination unit 62 gives priority to the selection. If the current VPC cannot be used as it is by referring to the VPC configuration information (VPCD) 93, a partially matching low traffic partial VPC is selected on the target route, and a combination with the partial VPC is selected. Then, it is also transferred to the VPC expansion unit 63.
[0049]
The VPC extension unit 63 sets VPC blockage for all the VPCs of the combination of the VPCs passed from the VPC extension route determination unit 62 (here, the VP link of switch A to switch C and the VP link of switch C to switch D). The release information (VPBD) 84 is set to be blocked and is set to the blocked state, the VPC usage status management information (VPUD) 83 is observed, and a free space (here, the number of used channels is 0) is waited for. After that, when there is free space, it communicates with the switch node (VPH) 17 of an appropriate switch (switch C) that becomes a connection point of each VPC, and establishes a new VPC (switch A to switch D via the switch C) as a whole. To do.
[0050]
Then, the VPC extension unit 63 performs the block setting on the VP network configuration information (VPTD) 82, the VPC usage status management information (VPUD) 83, the VPC block setting release information (VPBD) 84, and the VPC configuration information (VPCD) 93. The VPC is updated to the established new VPC (however, the VPC blockage setting release information (VPBD) 84 remains in the blockage setting state), and finally the block release is released to the VPC blockage setting release information (VPBD) 84 of the established new VPC. Set. However, when the spare VPC is used, the block setting and the empty confirmation are not executed. Thereby, the above procedure is omitted.
[0051]
Further, when using the partial VPC, the VPC extension unit 63 sets a block in the VPC block setting release information (VPBD) 84 of the VPC to be divided. Next, after checking the vacancy from the VPC usage status management information (VPUD) 83, it communicates with an appropriate switch node (VPH) 17 and separates it into a partial VPC to be used and another partial VPC. The partial VPC used by the former and the remaining VPCs obtained by the VPC expansion route determination unit 62 are set in the same manner as described above. However, there is no information regarding the partial VPC.
[0052]
Also, for the other partial VPCs, new information of VPC blockage setting release information (VPBD) 84, VPC usage status management information (VPUD) 83, VPC configuration information (VPCD) 93 is added (however, VPC blockage setting release is canceled) Information (VPBD) 84 remains in the blocking setting state), the old information of the divided VPC is deleted from VPC configuration information (VPCD) 93, VP network configuration information (VPTD) 82 is updated, and finally the VPC of the other partial VPC Block release is set in the block setting release information (VPBD) 84.
[0053]
When the traffic evaluation standard information (EVCD) 91 and the physical network configuration information (PHTD) 92 are input from the network operation manager in the above operation process, the information update unit 64 transmits the old information with the new information transmitted. Information is updated to contribute to generation of a new VP network.
As described above, by the mutual operation of the traffic observation evaluation unit 61, the VPC extension route determination unit 62, and the VPC extension unit 63, the VP network that automatically follows the increase in traffic and allocates resources corresponding to the traffic is re-established. The configuration can be realized dynamically. Therefore, call connection control that optimally redistributes VPC resources can be realized, and network resources can be efficiently operated.
[0054]
In addition, the workload of the network operation manager is reduced and the traffic evaluation standard information and the like can be updated in a timely manner so that the network operation manager can appropriately set the operation state.
In FIG. 2, the function units of the call connection APL 13, the operation management APL 14, the call connection controller (CPCC) 15, and the network operation management controller (OMCC) 16 do not necessarily have to be in different individual nodes. It is also possible to accommodate the same node in combination.
[0055]
This embodiment is an example applied to an ATM communication network, but it is needless to say that the present embodiment can be applied to a packet communication network having similar circumstances.
[0056]
【The invention's effect】
As described above, according to the first aspect of the present invention, the network operation management controller is provided as part of the call connection control performed by the call connection controller in the logical multiplexing transmission line network. The network connection route can be reconfigured automatically following the increase in traffic without requiring administrator intervention, and the load on the network operation manager can be reduced.
[0057]
According to the second aspect of the present invention, if there is a spare connection route, it can be selected with priority, so that the network reconfiguration procedure can be simplified.
In the third aspect of the present invention, when the current connection route cannot be used as it is, a partial connection route that uses a low traffic connection route that partially matches the target route and other partial connection routes are used. Separate and set each as part of an additional route, so resources can be redistributed optimally.
[0058]
In the invention according to the fourth aspect, the operation state can be changed from the network operation manager. In the invention described in claim 5, the traffic evaluation standard information and the physical transmission network configuration information transmitted from the network operation manager can be updated and used. This makes it possible to realize efficient and easy network operation.
In the invention described in claim 6, the VP network in the ATM communication network can be automatically set.
[0059]
According to the seventh aspect of the present invention, automatic setting of the VP network can be performed in call connection control executed in an environment of a distributed control architecture that has been proposed and realized in recent years.
[Brief description of the drawings]
FIG. 1 is a block diagram showing the principle of an invention according to claim 1;
FIG. 2 is a configuration example of an embodiment corresponding to claims 1 to 7;
FIG. 3 is an example of a physical network using a VP link.
FIG. 4 is an example of a VPC network based on VPC.
FIG. 5 is an operation explanatory diagram.
[Explanation of symbols]
1 Information acquisition means
2 Traffic observation evaluation means
3 Additional route determination means
4 connection route expansion means
11 Communication network (for inter-node communication)
12 Communication network (target for call connection control)
13 Call connection APL (call connection application accommodating node)
14 Operation management APL (Operation management application accommodating node)
15 Call connection controller (CPCC) {CPCC accommodating node}
16 Operation management controller (OMCC) {OMCC accommodating node}
17 Switch node (VPH / VCH accommodating node)
61 Traffic Observation Evaluation Unit
611 History information
62 VPC expansion route determination unit
63 VPC expansion unit
64 Information update unit
80 Call connection related information
81 Call connection occurrence information (CPED)
82 VP network configuration information (VPTD)
83 VPC usage status management information (VPUD)
84 VPC blockage setting release information (VPBD)
91 Traffic Evaluation Criteria Information (EVCD)
92 Physical network configuration information (PHTD)
93 VPC configuration information (VPCD)

Claims (7)

Provided as part of call connection control in a communication network that forms a logically multiplexed transmission line network that divides transmission information into transmission units and logically multiplexes and transmits the transmission units on the physical transmission network. The network operation management controller
An information acquisition means for acquiring call connection information and call connection occurrence information used by a call connection controller that is activated for each call connection and establishes a call connection in the logical multiplexing transmission line network; ,
Traffic observation and evaluation means for taking a history of the acquired call connection information and call connection occurrence information, and detecting a high-traffic connection route that requires additional connection routes based on the history and traffic evaluation reference information; ,
An additional route determining means for determining a combination of active connection routes with a low number of connections and low traffic that can configure the detected high traffic connection route with reference to configuration information of the physical transmission network;
The call connection information used by the call connection controller is established by waiting for a vacant state after blocking the determined current connection route and communicating with the switch of the end point node of each connection route to establish a desired new connection route. And a connection route expansion means for releasing the blockage of the new connection route after updating the network. In the automatic setting system of the logical multiplexing transmission line network according to claim 1,
The connection route expansion means selects the spare connection route without executing the blockage and waiting for a free state when the determined current connection route includes a spare connection route in combination with the connection route. A system for automatically setting up a logically multiplexed transmission line network characterized by priority. In the automatic setting system of the logical multiplexing transmission line network according to claim 1,
If the current connection route cannot be used as it is, the additional route determination means selects a low traffic connection route that partially matches the target route, and waits for a free state after the connection route is blocked. Communicate with the appropriate switch, separate the partial connection route to be used from other partial connection routes, determine the combination of the former partial connection route and other working connection routes, and the other partial connection routes of the latter A system for automatically setting up a logically multiplexed transmission line network, characterized in that the route is determined as each new connection route. In the automatic setting system of the logical multiplexing transmission line network according to claim 1,
The logical multiplex transmission line characterized in that the traffic evaluation standard information used by the traffic observation evaluation means and the configuration information of the physical transmission network referred to by the extension route determination means are input from a network operation manager in a timely manner. Automatic network setting method. In the automatic setting system of the logical multiplexing transmission line network according to claim 4,
A logical multiplexing transmission line network comprising information updating means for receiving traffic evaluation reference information and physical transmission network configuration information input by a network operation manager as appropriate and updating old information to new information Automatic setting method. In the automatic setting system of the logical multiplexing transmission line network according to claim 1,
The communication network is an ATM communication network, the logical multiplexing transmission line network is a VP (virtual path) network, and the connection route is a VPC (virtual path connection). Automatic setting method for multiplexed transmission network. In the automatic setting system of the logical multiplexing transmission line network according to claim 6,
The communication network includes a first communication network for inter-node communication and a second communication network that is a target of call connection control,
The first communication network accommodates a first node that accommodates a handler that controls switching of VP / VC constituting the second communication network and a call connection controller that establishes a call connection in a predetermined area of the second communication network. And a second node that
When these nodes communicate with each other via the first communication network and realize call connection control of the second communication network,
An automatic setting method for a logically multiplexed transmission line network, wherein the network operation management controller is provided for each predetermined area of the second communication network.

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