Survivable service flow conducting method based on interlayer message routing

Abstract

A survivability business dredging method based on interlayer message routing belongs to the technical field of communication network, and relates to an optical network business dredging technique and resource allocation method. The survivability business dredging method comprises the following steps: step1: constructing a virtual topological network according to a physical topological network structure; step 2: executing routing and resource allocation to each service in service aggregate in the virtual topological network; step 3: modularizing optical path; and step 4: allocating resource for physical chain in the physical topological network according to the optical path modularization result obtained in the step 3. According to the invention, at the state the connection state and service aggregate between the network node and the node is known, the routing is searched for service and resource is collocated based on the interlayer information. The usage of total resource in the physical network is reduced as possible. Furthermore the resource collocation speed is greatly increased. The invention is suitable for WDM optical network and is also suitable for two-layer and multi-layer network with different service granularities of the upper layer and the lower layer, for example: IP/MPLS over WDM network, two-layer SDH network, etc.

Description

technical field [0001] The invention belongs to the technical field of communication networks, and relates to an optical network service volume grooming technology and a resource allocation method. Background technique [0002] With the development of multi-layer network and optical network technology, the two-layer WDM optical transport network has become the core technology of the next-generation backbone network due to its huge transmission bandwidth. Since the bandwidth of many service requests in a WDM network is much smaller than the granularity of a wavelength, allocating an independent wavelength channel for each service request will seriously reduce network utilization. Therefore, it is necessary to aggregate multiple low-speed service requests in one Transmission on the wavelength channel, which is the so-called traffic grooming technology; at the same time, the huge transmission bandwidth is also facing challenges. Once the network components fail, a large amount ...

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Problems solved by technology

[0013] 2) The inter-layer link mapping information H is used twice for calculation, and the resource increase on the physical link is superimposed as the weight of the virtual link. This weight setting method causes the weights on almost every virtual link to be relatively close to each other. , so that when routing services on the virtual topology, it is easy to add optical paths, resulting in an increase in physical resources

[0014] 3) It takes a long time to iterate for each b

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