Energy efficient resource allocation and path reconfiguration method based on spectrum sensing in elastic optical network

Abstract

The present invention relates to an energy-efficient resource allocation and path reconfiguration method based on spectrum sensing in an elastic optical network, including a spectrum allocation method based on frequency slot utilization sensing and a path reconfiguration mechanism based on spectrum sensing: a method based on frequency slot utilization sensing The spectrum allocation method refers to considering the use of frequency slots on the adjacent links of the routing path when allocating spectrum resources, and selecting frequency slots with high usage rates on adjacent links to transmit service requests, making spectrum resources more integrated and reducing network traffic. Spectrum fragmentation to improve the success rate of subsequent requests on the path with the lowest power consumption; the path reconfiguration mechanism based on spectrum awareness means that when the spectrum resources on the path with the least power consumption of a request are occupied by other requests, it is necessary to select suboptimal When the path is transmitted, if the request is transmitted on the suboptimal path for a period of time and other requests occupying the path with the lowest power consumption value of the request are released, then the subsequent transmission of the request will be reconfigured to the path with the lowest power consumption. Reduces overall network energy consumption by routing requests through their least power-consuming paths.

Description

technical field [0001] The invention belongs to the technical field of optical fiber communication, and relates to an energy-efficient resource allocation and path reconfiguration method based on spectrum sensing in an elastic optical network. Background technique [0002] With the rapid development of applications with high bandwidth requirements, such as HDTV (high-definition television), video conferencing, and multimedia distance education, the bandwidth resources of the network are becoming increasingly tense. Currently, the WDM network deployed in the backbone network uses wavelength division multiplexing technology to multiplex multiple wavelength channels into one optical fiber for transmission, so as to increase the transmission bandwidth of a single optical fiber. However, the WDM (Wavelength Division Multiplexing) optical network follows the ITU-T fixed frequency grid standard, and there are problems such as inflexible allocation of network spectrum resources and ...

AI Technical Summary

Problems solved by technology

Because in the network operation phase, the dynamic establishment and release of connection requests in the network will generate a large number of spectrum fragments. Spectrum fragmentation may cause the routing path with the least power consumption of the request to be unavailable, and may even cause request blocking.

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