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Protection method dividing management region in optical network

A technology for managing areas and optical networks, applied in the protection field of dividing management areas in optical networks

Inactive Publication Date: 2011-05-11
NORTHEASTERN UNIV LIAONING
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  • Description
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However, these algorithms assume that each domain has the same protection requirements

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  • Protection method dividing management region in optical network
  • Protection method dividing management region in optical network
  • Protection method dividing management region in optical network

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Embodiment Construction

[0083] The present invention is further described in conjunction with accompanying drawing:

[0084] This method considers three types of area protection: shared protection, dedicated protection and no protection.

[0085] In order to describe the contents of the present invention conveniently, at first the following symbols and terms are defined

[0086] Given a network topology G(N, L, W, D), where N is the set of nodes, L is the set of bidirectional links, W is the set of available wavelengths on each fiber, and D is the set of multiple domains. This paper assumes that the bandwidth of each service request is a wavelength granularity, and each node has the capability of full wavelength conversion. The protection methods available for each domain include shared protection (SP), dedicated protection (DP) and no protection (NP). The algorithm for calculating the shortest path in VTG adopts Dijkstra's algorithm. Some important symbols in the text are as follows:

[0087] a:...

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Abstract

A method for protecting the management area division in the optical-fiber network, which belongs to the technical field of optical-fiber network communication and comprises the following steps: (1) initializing the given single-domain physical topology; (2) creating different subordinate virtual topologies according to different protection modes, all single-domain virtual topologies being connected through boundary nodes so as to form a multi-domain virtual topology; (3) searching the path on a virtual topological diagram through a path selecting function when the business request arrives; and searching virtual routings among the virtual lodging node pairs in multiple domains, when source lodging nodes are not in a same domain. The invention not only can abstract the multi-domain optical-fiber network into virtual topological diagram for solving the problem of cross-domain routing, but also considers the divisional special protection, sharing protection, and non protection in different domains.

Description

technical field [0001] The invention belongs to the technical field of optical network communication, in particular to a protection method for dividing management areas in an optical network. Background technique [0002] In recent years, due to the explosive growth of Internet services, research on high-speed transmission networks has been triggered. Wavelength Division Multiplexing (WDM) technology can make full use of the huge bandwidth resources in the optical fiber, so it is widely used. Since the transmission rate of the wavelength channel in each optical fiber can be as high as gigabits, the failure of the optical fiber link will cause a large number of service interruptions, so the protection design of the WDM optical network must be carried out. Traditional protection mechanisms for WDM networks are mostly aimed at small-scale single-domain optical networks. In practice, with the continuous expansion of network scale, optical networks adopt a hierarchical structure...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L12/56H04J14/02H04L12/715
Inventor 张愉郭磊王兴伟郑小兵王雪葵
Owner NORTHEASTERN UNIV LIAONING