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A Cooperative Caching Method Based on Improved Fruit Fly Optimization Algorithm in Fog Wireless Access Network

A fruit fly optimization algorithm and wireless access network technology, applied in computing, computing models, instruments, etc., to achieve the effect of reducing content redundancy, improving utilization rate, and low complexity

Active Publication Date: 2021-11-12
SOUTHEAST UNIV
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Problems solved by technology

This problem is a discrete optimization problem and an NP-hard problem. The global optimal solution can be obtained by using the dynamic programming method, but the time complexity of this method is exponential time complexity.

Method used

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  • A Cooperative Caching Method Based on Improved Fruit Fly Optimization Algorithm in Fog Wireless Access Network
  • A Cooperative Caching Method Based on Improved Fruit Fly Optimization Algorithm in Fog Wireless Access Network
  • A Cooperative Caching Method Based on Improved Fruit Fly Optimization Algorithm in Fog Wireless Access Network

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Embodiment Construction

[0059] This example provides a cooperative caching method based on the improved fruit fly optimization algorithm in the fog wireless access network. Its application scenarios are as follows figure 1 As shown, if the file is not divided into blocks, each access point in the cluster stores the entire file. When a user requests the file, all access points in the cluster cooperate to transmit the file to increase the signal-to-interference ratio at the user end , to increase the reliability of transmission; when the file is divided into blocks, the user equipment has a certain continuous interference cancellation capability M, that is, the file is divided into M sub-files at most, and when the file is divided into a certain number of sub-files, the nearby access points Each of these subfiles is stored one by one, and the subfiles are transmitted cooperatively. If the file is not cached, the file is obtained from the cloud, first cached to the F-AP closest to the user, and then tra...

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Abstract

The invention discloses a cooperative caching method based on an improved fruit fly optimization algorithm in a fog wireless access network. , that is, generate a new cache strategy; (3) calculate and solve the successful transmission probability under the corresponding cache strategy according to the obtained new individual, and update the population, and finally get the current best population, that is, the current best cache strategy; (4 ) If the number of iterations reaches the maximum number of iterations, the iteration stops, and the current best caching strategy is used as the final best caching strategy, otherwise go to (2). The invention determines the cache decision of the fog access point in the fog wireless access network in a cooperative manner, and has low computational complexity and high probability of successful transmission.

Description

technical field [0001] The invention belongs to edge caching technology, in particular to a cooperative caching method based on an improved fruit fly optimization algorithm in a fog wireless access network. Background technique [0002] With the rapid increase of smart devices and social networking services, existing wireless networks are facing increasing load pressure. Fog-Radio Access Network (F-RAN, Fog-Radio Access Network) can increase the probability of successful transmission by arranging popular content to the F-AP (Fog Access Point) closer to the user. However, the storage space of F-AP is limited, and the traditional MPC (Most Popular Contents) strategy cannot obtain content diversity gain, and LCD (Largest Content Diversity) strategy cannot obtain collaboration gain. Considering the dense deployment of F-APs, the caching of adjacent cooperative nodes, and the partitioning of files to provide services to users in the cluster center. This strategy can improve con...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L29/08G06N3/00
CPCH04L67/06G06N3/006H04L67/568
Inventor 蒋雁翔彭奥奥尤肖虎
Owner SOUTHEAST UNIV
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