An Anycast Service Resource Allocation Method with Reduced Spectrum Fragmentation and Delay

Abstract

The invention discloses an anycast service resource allocation method for reducing frequency spectrum fragments and service transmission time delay, and belongs to the technical field of optical fiber communication. A routing and frequency spectrum allocation strategy specific method for avoiding the fragments, which is disclosed by the invention, comprises the steps of: in the frequency spectrum distribution process, selecting frequency spectrum blocks of which sizes are equal to a service requested bandwidth to transmit a service; if no such frequency spectrum block exists, pre-allocating the service to all available frequency spectrum blocks on a path; calculating corresponding frequency spectrum fragment degrees; and selecting the frequency spectrum blocks which enable the frequency spectrum fragment degrees to be the lowest to transmit the service. A service segmentation strategy specific method for reducing time delay, which is further disclosed by the invention, comprises the steps of: carrying out service segmentation transmission on a service which is failed in frequency spectrum allocation by a single path which avoids fragments; and if failed, carrying out service segmentation transmission by multiple paths with the minimum time delay difference. According to the anycast service resource allocation method disclosed by the invention, transmission time delay and the frequency spectrum fragments of an anycast service in an elastic optical interconnection data center network can be obviously reduced, a network bandwidth blocking rate is reduced, and a network frequency spectrum utilization rate is improved.

Description

technical field [0001] The invention belongs to the technical field of optical fiber communication, and relates to an anycast service resource allocation method that reduces frequency spectrum fragmentation and time delay. Background technique [0002] In recent years, in the data center interconnection network, with the continuous popularization of new low-latency network applications such as cloud computing, mobile applications, network video, and CDNs (Content Delivery Network, Content Delivery Network), the bandwidth demand of the network has shown geometric growth. Cisco's research report pointed out: In the past five years, global IP (Internet Protocol, Internet Protocol) requests have increased by more than four times, and will continue to grow at a high speed in the future. So far, there are more than 500,000 data centers in the world, and it is growing at a rate of 32% per year. By 2018, global IP requests will exceed 1.4ZB (1ZB=1024B, ZB: Zettabyte, zettabyte); an...

AI Technical Summary

Problems solved by technology

However, due to the different distances from the service source node to the data center, each sub-service arrives at the data center and is processed at a different time, resulting in a serious delay difference, which will reduce the impact of new low-latency network applications such as network video and CDNs. performance

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