Three-layered cooperative type caching method of fog wireless accessing network

Abstract

The invention discloses a three-layered cooperative type caching method of a fog wireless accessing network. The three-layered cooperative type caching method comprises the following steps: (1) dividing the fog wireless accessing network into a fog wireless accessing node layer and a cloud node layer; (2) regulating forwarding routing of a file request in the network; (3) calculating a request arriving rate of each file by a fog wireless accessing node through the received file request, and calculating the weight of each file in a knapsack algorithm according to the request arriving rate of each file; finally, solving optimal caching distribution in a fog wireless accessing point cluster by adopting the knapsack algorithm; (4) calculating the request arriving rate of each file by a clusterhead through the received file request; calculating the weight of each file in the knapsack algorithm according to the request arriving rate; finally, solving optimal inter-cluster cooperation caching distribution by adopting the knapsack algorithm; (5) calculating a file arriving rate by a cloud node through the received file request, and calculating the weight of each file in the knapsack algorithm according to the request arriving rate; finally, solving cloud node layer optimal caching distribution by adopting the knapsack algorithm. According to the three-layered cooperative type cachingmethod disclosed by the invention, a returning chain load can be effectively reduced.

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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