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Route and spectrum allocating method based on energy aware function and applied to elastic optical network

An elastic optical network and energy-aware technology, which is applied in the field of optical communication, can solve the problems of resource congestion on the optical path and does not consider the available spectrum resources of the network, and achieve the effect of reducing network service blocking rate and low energy consumption

Inactive Publication Date: 2014-09-17
NANJING UNIV OF POSTS & TELECOMM
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Problems solved by technology

Although this method saves energy consumption, it does not consider the available spectrum resources of the network, which may cause blocking problems due to insufficient resources on the optical path

Method used

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  • Route and spectrum allocating method based on energy aware function and applied to elastic optical network

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Embodiment Construction

[0026] The technical scheme of the present invention is described in detail below in conjunction with accompanying drawing:

[0027] Its specific implementation process is as follows figure 1 shown, including the following steps:

[0028] Step 1: When the client request arrives, first calculate the shortest path;

[0029] Step 2: There are multiple modulation methods to choose from for the shortest path. Since each modulation method has a corresponding maximum transmission distance, select the available modulation method according to whether the transmission distance is greater than or equal to the path length, and follow the given calculation The method calculates the power consumption value (MetricPC) in the corresponding network respectively, and selects the modulation method that minimizes the power consumption value;

[0030] Step 3: Judging whether there are enough continuous available frequency slots, if yes, then perform step 6, otherwise, perform step

[0031] Step...

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Abstract

The invention discloses a route and spectrum allocating method based on the energy aware function and applied to an elastic optical network. According to the route and spectrum allocating method, on the basis that the power consumption of components constituting the optical network is considered, the route with the smallest total power consumption and the modulation mode with the smallest total power consumption are selected through calculation; when spectrum resources are not enough, the lowest connectivity is guaranteed by selecting the modulation mode with a higher order, so that the total blocking rate of services is reduced; when the route is worked out, frequency slot allocation is conduced through a primary matching algorithm, and an optical path is established. By the adoption of the route and spectrum allocating method based on the energy aware function and applied to the elastic optical network, energy consumption is reduced, and the blocking rate of the services can be reduced.

Description

technical field [0001] The invention relates to an energy-aware-based routing and frequency spectrum allocation method in an elastic optical network, and belongs to the technical field of optical communication. Background technique [0002] The concept of elastic optical network is proposed relative to WDM network that cannot be changed dynamically. Its "elasticity" includes two meanings: the first refers to the fixed spectrum segmentation mechanism of WDM network. The spectrum segmentation mechanism adopted by elastic optical network is flexible. Variable; the second means that the variable bandwidth converter used in the elastic optical network can establish an elastic optical path, that is, for the same end-to-end optical path, different bit rates can be used according to the actual connection environment and connection requirements. achieve higher spectral efficiency. [0003] Routing and Spectrum Allocation (RSA), that is, to establish an end-to-end optical path in an ...

Claims

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Application Information

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IPC IPC(8): H04L5/00H04J14/02H04Q11/00
Inventor 沈建华孙晔
Owner NANJING UNIV OF POSTS & TELECOMM
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