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A UAV and user cooperative cache placement method and device

A drone, user technology

Active Publication Date: 2021-06-22
BEIJING UNIV OF POSTS & TELECOMM
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] For the drone communication network that introduces caching technology, previous work did not consider the scenario where both the drone and the user have caching capabilities and the design of the cache placement strategy for the drone and the user at this time

Method used

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  • A UAV and user cooperative cache placement method and device
  • A UAV and user cooperative cache placement method and device
  • A UAV and user cooperative cache placement method and device

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Embodiment 1

[0080] Aiming at the problem of repeated transmission of a large amount of data in the Internet, in the UAV communication network, caching technology can make users more efficient by placing some popular content in advance on edge nodes such as UAVs and users that are closer to users. Get content quickly and easily. The purpose of the present invention is to provide a cooperative cache placement method between drones and users in order to effectively reduce the time delay of user content acquisition in the whole network. For a communication network composed of UAVs, users, and ground base stations, UAVs and users have caching capabilities at the same time. Through the joint optimization of UAV and user caching, the caching content of UAVs is used to guide users' caching decisions. At the same time, by adjusting the content of the UAV cache according to the user's cache decision, the optimal storage content of the cache nodes in different locations based on the overall network ...

Embodiment 2

[0123] The embodiment of the invention also discloses a UAV and user cooperative cache placement device in the UAV communication network. The following briefly introduces the structural composition of the UAV and user cooperative cache placement device. The device is deployed on the macro base station to optimize the content cache of all UAVs and users in the network. The device includes: an optimal cache placement processor for drones, a user optimal cache placement processor, and an optimization control processor.

[0124] The UAV optimal cache placement processor is connected with the user optimal cache placement processor and the optimization control processor. According to the user's cache placement information input by the optimization control processor, ADMM (alternating direction multiplier method) is used to obtain the optimal UAV cache placement information at this time, and this information is input into the user's optimal cache placement processor.

[0125] The us...

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Abstract

The present invention provides a UAV and user cooperative cache placement method and device. The method includes: obtaining the UAV cache placement information through the alternate direction multiplier method, and iterating the user cache placement information through a global greedy algorithm; The man-machine cache placement and user cache placement are iterated continuously to determine whether the maximum number of iterations is reached; if the iteration does not reach the maximum number, the iteration number is increased by 1, and the UAV cache placement information and user cache placement information are iterated again; if the iteration reaches the maximum The number of times, output the cache placement information of the UAV and the user at this time; the technical solution of the embodiment of the present invention can solve the technical problem of not jointly optimizing the cache placement decision of the UAV with caching capability and the user in the prior art.

Description

technical field [0001] The present invention relates to the technical field of UAV communication technology, in particular to a UAV and user cooperative cache placement method and device. Background technique [0002] With the rapid development of small UAVs supporting wireless communication, UAVs have been gradually applied in practical scenarios such as disaster recovery, hotspot coverage, relay communication, and information dissemination / data collection, and have become an effective solution for certain communication scenarios. One of the techniques. In a cell with dense users, massive data requests will put enormous pressure on the load of the base station. With its good flight characteristics, drones can be quickly deployed around users as an air base station, assisting the cellular network to provide communication services to ground users. Expand system capacity and improve user service quality. Repeated transmission of a small number of popular content is one of th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B7/185H04W4/70
CPCH04B7/18506H04W4/70
Inventor 张天魁陈超许文俊曾志民
Owner BEIJING UNIV OF POSTS & TELECOMM
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