Unmanned aerial vehicle and user collaborative cache placement method and device

A technology for drones and users, which is applied in the field of drone communication and can solve problems such as the placement strategy of drones and users in scenarios that do not consider the caching capabilities of drones and users.

Active Publication Date: 2020-07-28
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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  • Unmanned aerial vehicle and user collaborative cache placement method and device
  • Unmanned aerial vehicle and user collaborative cache placement method and device
  • Unmanned aerial vehicle and user collaborative cache placement method and device

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Embodiment 1

[0080] In response to the problem of repeated transmission of large amounts of data in the Internet, in the drone communication network, caching technology can make users more efficient by placing some popular content on edge nodes such as drones and users closer to the user in advance. Get content quickly and easily. The purpose of the present invention is to provide a collaborative cache placement method for drones and users in order to effectively reduce the time delay of user content acquisition in the entire network. For a communication network composed of drones, users, and ground base stations, both drones and users have cache capabilities. Through the joint optimization of the drone and user cache, the cache content of the drone is used to guide the user’s caching decision. At the same time, by adjusting the content of the UAV cache according to the user's cache decision, the best storage content of the cache nodes based on different locations in the overall network env...

Embodiment 2

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

[0124] The UAV's optimal cache placement processor is connected with the user's optimal cache placement processor and optimized control processor. According to the user cache placement information input by the optimization control processor, the 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] ...

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Abstract

The invention provides an unmanned aerial vehicle and user collaborative cache placement method and device, and the method comprises the steps: obtaining the cache placement information of an unmannedaerial vehicle through adoption of an alternating direction multiplier method, and carrying out the iteration of the cache placement information of a user through a global greedy algorithm; continuously iterating the unmanned aerial vehicle cache placement and the user cache placement, and judging whether the maximum number of iterations is reached or not; if the number of iterations does not reach the maximum number, adding 1 to the number of iterations, and iterating the unmanned aerial vehicle cache placement information and the user cache placement information again; and if the number ofiterations reaches the maximum number, outputting cache placement information of the unmanned aerial vehicle and the user at the moment. According to the technical scheme provided by the embodiment ofthe invention, the technical problem that the unmanned aerial vehicle with the caching capability and the user caching placement decision are not jointly optimized in the prior art can be solved.

Description

Technical field [0001] The present invention relates to the technical field of drone communication technology, in particular to a method and device for collaborative buffer placement between drones and users. Background technique [0002] With the rapid development of small drones that support wireless communication, drones have gradually been used in practical scenarios such as disaster recovery, hotspot coverage, relay communication, and information dissemination / data collection, becoming effective for solving certain specific communication scenarios. One of the technologies. In a cell with dense users, massive data requests will put tremendous pressure on the base station load. 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. The repeated transmission of a small number of popular co...

Claims

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Application Information

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Patent Type & Authority Applications(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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