Network controlling apparatus and path controlling method therein

Abstract

A network controlling apparatus appropriately arranges a generated path every hour with a change in section and bandwidth requested in each time period to flexibly generate a path according to the state of occurrence of requests. The network apparatus comprises a storing unit storing information for management of the network, and a controlling unit controlling setting of the network device relating to a connection of network devices at two edge points in the network to obtain path setting satisfying the quality guarantee request, using a path already set or scheduled to be set, or a newly generated path, by referring to the information stored in the storing unit when receiving the quality guarantee request.

Description

technical field [0001] The invention relates to a device for providing communication services, which guarantees communication quality in any time zone by making reservations in a network, especially in a label switching network. In particular, the present invention relates to a network control device suitable for use in a network employing MPLS (Multi-Protocol Label Switching) when providing a communication service that guarantees communication quality in an arbitrary time zone by reservation. path control method. Background technique [0002] In recent years, studies have been conducted to provide a broadband guarantee service that guarantees communication quality in any time area by reservation. The broadband guaranteed service is a service in which the network guarantees the bandwidth through reservation when the user requests the network to provide communication with guaranteed bandwidth. Therefore, users can obtain communication quality guarantee and receive communica...

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Problems solved by technology

[0015] In this regard, the above-mentioned first method [1] causes a problem of using only a predetermined path, and thus, even if the link usage status changes with time, the route cannot be changed, causing trouble when it is intended to use network resources efficiently

This approach also does not improve loss probability

[0016] The second approach [2] can properly allocate network resources (e.g., bandwidth) because route computation and setup are performed for each request, but lacks scalability due to increased program overhead

[0017] The third method [3] can reduce the program overhead because it can guarantee a bandwidth larger than the requested bandwidth, but because it also guarantees the bandwidth that is not used, it does not economically guarantee resources.

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