A three-layer cooperative caching method for fog wireless access network

Abstract

The invention discloses a three-layer cooperative caching method for a fog wireless access network, comprising: (1) dividing the fog wireless access network into a fog wireless access point layer and a cloud node layer; (2) specifying a user's file request The route forwarded in the network; (3) The fog wireless access point calculates the request arrival rate of each file through the received file request, and calculates the weight of each file in the knapsack algorithm according to the file request arrival rate, and finally uses the knapsack algorithm to solve the problem The optimal cache distribution in the fog wireless access point cluster; (4) The cluster head calculates the request arrival rate of each file through the received file request, and calculates the weight of each file in the knapsack algorithm according to the request arrival rate, and finally adopts the knapsack algorithm Solve the optimal inter-cluster cooperative cache distribution; (5) The cloud node calculates the file arrival rate through the received file request, and calculates the weight of each file in the knapsack algorithm according to the request arrival rate, and finally uses the knapsack algorithm to solve the cloud node layer optimal cache distributed. The present invention can effectively reduce the load of the backhaul link.

Description

technical field [0001] The invention relates to content cache technology, in particular to a three-layer cooperative cache method for a fog wireless access network. Background technique [0002] At present, in order to reduce the load of the backhaul link in the network, people's research on the buffer arrangement in the wireless communication system is mainly concentrated on the existing architecture such as the cloud radio access network, and the research on the single-layer buffer arrangement at the base station layer is the main research. [0003] However, the existing communication network architecture does not meet the requirements of 5G / B5G communication. Moreover, with the arrival of the 5G / B5G era, the number of files in the network will increase greatly, and the load of the backhaul link in the network will also increase greatly. Therefore, it is an urgent problem to find a cache placement strategy suitable for 5G / B5G network architecture with low link load. Cont...

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Problems solved by technology

[0003] However, the existing communication network architecture does not meet the requirements of 5G / B5G communication. Moreover, with the advent of the 5G / B5G era, the number of files in the network will increase greatly, and the load on the backhaul link in the network will also increase greatly.

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