Content request method based on fragment cache in unmanned aerial vehicle ad hoc network

Abstract

The invention discloses a content request method based on fragment cache in an unmanned aerial vehicle ad hoc network. On the premise that each node has the caching capability, the request content is fragmented by using the fragment offset mark in the request message, so that the number of the request messages is reduced, and the data message is acquired from the neighbor node to the greatest extent; therefore, the total delay of data message acquisition is reduced, and the load of a return path is reduced. The method comprises the steps that a destination node sets a slice offset mark in a generated request message; a relay node checks own node cache according to the content in the request message and the slice offset mark, passes back the hit cache slice and modifies the slice offset mark; and finally, the data message corresponding to the chip offset mark is transmitted back to the destination node. In the return process, the relay node can store the cache chips which are not cached. According to the method, a plurality of data messages are obtained by a single request message, so the request delay is reduced, and the data return load is reduced.

Description

technical field [0001] The present invention relates to a method for requesting cached content between adjacent nodes, more particularly, to a method for requesting content based on fragmentation cache in the technical field of unmanned aerial vehicle ad hoc networks. Background technique [0002] With the rapid development of Internet technology, the diversification of mobile devices, and the enhancement of processing capabilities, mobile ad hoc networks, as the edge network in the Internet, have become one of the research fields that have attracted more and more attention from global users and network builders. Mobile ad hoc networks are based on Different networking devices can be divided into different types such as sensor networks, vehicle ad hoc networks, and UAV cluster networks. [0003] The UAV swarm is supported by the ability of a single UAV, centered on the information communication network, centered on swarm intelligence, and coordinated and interacted with UAVs...

AI Technical Summary

Problems solved by technology

In the traditional method, nodes only cache complete content data, resulting in content request nodes can only obtain content from nodes with complete cache

However, this content request method can only obtain large-grained content data from the data source, and cannot make full use of the cache to obtain data nearby, thus increasing the acquisition delay and network load.

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