Routing spectrum allocation method and device suitable for elastic optical network

A flexible optical network and spectrum allocation technology, applied in the field of flexible spectrum optical network, can solve the problems of link congestion, low spectrum resource utilization, and many spectrum fragments.

Active Publication Date: 2020-10-30
FENGHUO COMM SCI & TECH CO LTD
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] Aiming at the above defects or improvement needs of the prior art, the present invention provides a routing spectrum allocation method and device suitable for elastic optical networks. Utilization rate, enabling the network to accommodate services with higher bandwidth requirements, thus solving the technical problems of local link congestion, spectrum fragmentation, and low spectrum resource utilization in elastic optical networks

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  • Routing spectrum allocation method and device suitable for elastic optical network
  • Routing spectrum allocation method and device suitable for elastic optical network
  • Routing spectrum allocation method and device suitable for elastic optical network

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Embodiment 1

[0043] In order to improve resource utilization in an elastic optical network and enable the network to accommodate services with higher bandwidth requirements, an embodiment of the present invention provides a routing spectrum allocation method suitable for an elastic optical network, such as figure 1 As shown, it mainly includes the following steps:

[0044] Step 101, after receiving a routing spectrum allocation request of a service, obtain service parameters of the current service.

[0045]For any service, the service parameters are pre-set, usually including one or more of the source and sink nodes of the service, service rate, spectrum width and the maximum number of routing calculations; when receiving the RSA of any service After the spectrum allocation request is routed, the corresponding processor or server can obtain the service parameters corresponding to the current service. Furthermore, when obtaining service parameters, it is also necessary to judge whether the...

Embodiment 2

[0066] On the basis of the routing spectrum allocation method suitable for elastic optical networks provided by the first embodiment above, the embodiment of the present invention further introduces the optical layer load balancing algorithm described in step 102 . Such as figure 2 As shown, according to the obtained business parameters, the optical layer load balancing algorithm is used to calculate the n paths with the smallest impact factor (i.e. step 102), which specifically includes the following steps:

[0067] Step 201, traverse the routes of all established services in the entire network, calculate and store each established route P j bottleneck link.

[0068] As mentioned earlier, there are many routes for all established services in the entire network. In order to select n paths with the smallest impact factor from the link topology, first calculate the corresponding bottleneck link for each established route. That is, the link with the highest spectrum occupancy ...

Embodiment 3

[0079] On the basis of the routing spectrum allocation method applicable to the elastic optical network provided in the first embodiment, the embodiment of the present invention further introduces the algorithm of the maximum path spectrum isolation degree described in step 103 . Such as image 3 As shown, for any path P in the n paths, the maximum path spectrum isolation algorithm based on the obtained service parameters is used to allocate available spectrum for the route (ie step 103), which specifically includes the following steps:

[0080] Step 301, according to the spectrum width of the current service, request to allocate m consecutive spectrum granules for the path P. After the corresponding processor or server obtains the corresponding request parameter (that is, the allocation request of m consecutive spectrum particles), it jumps to step 302 .

[0081] In step 302, according to the spectrum granule allocation request, a set of free spectrum blocks satisfying condi...

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Abstract

The invention discloses a routing spectrum allocation method and device suitable for an elastic optical network. The method comprises the steps of: obtaining a service parameter after receiving a routing spectrum allocation request of a service; according to the service parameters, calculating n paths with minimum influence factors by utilizing an optical layer load balancing algorithm; traversingthe n paths, and for the ith path, allocating an available spectrum to the route by using a maximum path spectrum isolation algorithm based on the service parameters; calculating the whole-network spectrum availability corresponding to the paths according to the routing spectrum allocation result of the ith path, and storing a mapping relationship with the corresponding routing spectrum allocation result; and selecting one path with the highest whole-network spectrum availability from the n paths as an optimal path, and returning the corresponding routing spectrum allocation result. The influence of routing allocation and spectrum allocation on network resources is comprehensively considered, spectrum fragments are reduced, the blocking rate is reduced, the spectrum resource utilization rate is increased, and the resource utilization rate is effectively increased.

Description

technical field [0001] The invention belongs to the technical field of flexible spectrum optical network, and more specifically relates to a routing spectrum allocation method and device suitable for flexible optical network. Background technique [0002] With the popularization and development of various bandwidth services such as cloud computing, Internet of Things and other emerging things, Internet data traffic has shown explosive growth, posing new challenges to the existing optical communication network. The traditional wavelength division multiplexing network (WavelengthDivision Multiplexing, abbreviated as WDM) due to its rough bandwidth granularity and rigid fixed wavelength allocation mode, leads to the problems of low bandwidth resource utilization and poor network flexibility; therefore, large capacity, high flexibility Security and scalability have become the main development direction of future communication networks. The elastic optical network effectively im...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/729H04Q11/00H04L45/125
CPCH04L45/125H04Q11/0062H04Q2011/0073H04Q2011/0086
Inventor 马坤
Owner FENGHUO COMM SCI & TECH CO LTD
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