Communications network independent designing system and managing method
First Claim
1. A traffic and topology independent communications network designing system for use in a communications network having a physical network and a logical network established among a plurality of nodes, comprising:
- physical network topology designing means for setting a topology of the physical network independently of a traffic condition of the communications network;
logical network topology designing means for setting a topology of the logical network independently of the traffic condition;
physical network capacity setting means, coupled to said physical network topology designing means, for setting, based on a long-term traffic demand in the communications network, a capacity of a physical transmission line in the physical network having the topology defined by said physical network topology designing means; and
logical network capacity setting means, coupled to said logical network topology designing means, for setting, based on an actual traffic demand in the communications network, a capacity of a virtual path in the logical network having the topology defined by said logical network topology designing means, whereintopologies and capacities of the physical and logical networks can be independently designed.
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Accused Products
Abstract
A designing and managing system for a communications network having a physical network and a logical network includes a designing system adaptable to a traffic fluctuation through a simple procedure, and a managing system for quickly selecting a suitable communications path in response to a path connection request and a path capacity change request. The designing system has units for respectively determining the topologies of the physical network and the logical network independently of traffic conditions, and units for setting the path capacities of the physical network and the logical network, respectively, based upon a long-term traffic demand and an actual request. The managing system includes a unit for registering the limited number of detour path candidates, a unit for determining the existence of a detour path in response to a virtual path connection request, and a unit, provided in a start point node of a communications path, for determining the acceptability of a change in the capacity of a path based on a value of a size of each link forming part of the communications path.
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Citations
26 Claims
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1. A traffic and topology independent communications network designing system for use in a communications network having a physical network and a logical network established among a plurality of nodes, comprising:
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physical network topology designing means for setting a topology of the physical network independently of a traffic condition of the communications network; logical network topology designing means for setting a topology of the logical network independently of the traffic condition; physical network capacity setting means, coupled to said physical network topology designing means, for setting, based on a long-term traffic demand in the communications network, a capacity of a physical transmission line in the physical network having the topology defined by said physical network topology designing means; and logical network capacity setting means, coupled to said logical network topology designing means, for setting, based on an actual traffic demand in the communications network, a capacity of a virtual path in the logical network having the topology defined by said logical network topology designing means, wherein topologies and capacities of the physical and logical networks can be independently designed. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A network design management center for designing a logical network for use in a communications network having a logical network established among a plurality of nodes, comprising:
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a first signal processing means for receiving a traffic condition of the communications network from one of the nodes in the communications network and outputting traffic information; circuit control means for controlling a design change of a capacity of a virtual path based on said traffic information and a present capacity of the virtual path in the logical network; logical network capacity setting means for changing a design of the capacity of the virtual path according to a virtual path capacity change request from said circuit control means; a second signal processing means for outputting to the node a virtual path capacity design change instruction output from said logical network capacity setting means; and logical network topology designing means for setting a topology of the logical network independently of the traffic condition. - View Dependent Claims (9, 10, 11)
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12. A network design managing center for designing a physical network for use in a communications network having a physical network established among a plurality of nodes, comprising:
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a first signal processing unit for receiving traffic information of the communications network; circuit control means for controlling a capacity design change of a transmission line of the physical network based on the traffic information received from said first signal processing unit and a present capacity of the physical network; physical network topology designing means for setting a topology of the physical network independently of a traffic condition of the communication network; and physical network capacity setting means for setting the capacity of said transmission line of the physical network of the topology set by said physical network topology designing means and changing a capacity design of the transmission line according to a physical transmission line capacity change request from said circuit control means. - View Dependent Claims (13, 14)
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15. A communications network managing system in a communications network having a physical network and a logical network with topologies and capacities of the physical network and the logical network independently designed, wherein
each node in the communications network comprises: -
band managing means for managing a band of a physical transmission link from one node to an adjacent node in the physical network after dividing the band into a reserved area to be assigned to a high-priority virtual path having a high-priority communication among a plurality of virtual paths through which communications are preformed through a transmission link in the logical network, and a shared band to be used regardless of priority of the communications; and communications path connection request acceptability determining means for determining acceptability of a connection request for a communications path starting from the one node only in the shared band when the connection request is related to a low-priority communication and both in the shared band and the reserved band when the connection request is related to a high-priority communication. - View Dependent Claims (16, 17, 18, 19)
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20. A communications network managing system in a communications network having a physical network, comprising:
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information packet sending means, provided in an end-point node of a communications path set to pass through optional nodes among a plurality of nodes in the communications network, for sending through the communications path an information packet in which spare capacity information about the communications path is sent toward a start-point node of the communications path; spare capacity information adding means, provided in each node in the communications path, for adding spare capacity information in the communications path toward an adjacent node to the information packet received from the adjacent node, and sending the information back to the start-point node through the communications path; and capacity change determining means, provided in the start-point node in the communications path, for determining based on contents of the information packet acceptability of a communication capacity change request for the communications path, wherein a communications path satisfying the communication capacity change request is selected, in response to the communication capacity change request, from a plurality of communications paths between start-point nodes and end-point nodes according to a determination result of said capacity change determining means. - View Dependent Claims (21, 22, 23, 24, 25)
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26. A communications network managing system in a communications network having a physical network, comprising:
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information packet sending means, provided in an end-point node of one communications path not completely included in another communications path among a plurality of communications paths set to pass through optional nodes in a plurality of nodes in the communications network, for sending through the communications path an information packet in which spare capacity information about the communications path is sent toward a start-point node of the communications path; spare capacity information adding means, provided in each node in the communications path not completely included in said another communications path, for adding spare capacity information in the communications path toward an adjacent node to the information packet received from the adjacent node, and sending the information back to the start-point node through the communications path; and capacity change determining means, provided in the start-point node in the communications path not completely included in said another communications path, and in the start-point node of the communications path completely included in the communications path not completely included in another communications path among the nodes, for determining acceptability of a communication capacity change request for the communications path for which a present node is a start point, wherein a communications path satisfying the communication capacity change request is selected, in response to the communication capacity change request, from a plurality of communications paths between start-point nodes and end-point nodes according to a determination result of said capacity change determining means.
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Specification