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Mobile edge cache placement method using request arrivalrate and dynamicity source publish content

An edge caching and dynamic technology, applied in climate sustainability, advanced technology, sustainable communication technology, etc., can solve the problem of inapplicability of MPF solution, reduce average service delay, reduce redundant data transmission, improve The effect of user experience

Active Publication Date: 2021-08-24
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the SPC is dynamic (that is, the dynamic content item in the SPC, referred to as DC-SPC), the MPF scheme is not applicable

Method used

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  • Mobile edge cache placement method using request arrivalrate and dynamicity source publish content
  • Mobile edge cache placement method using request arrivalrate and dynamicity source publish content
  • Mobile edge cache placement method using request arrivalrate and dynamicity source publish content

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Embodiment Construction

[0098] The present invention will be further described in detail below in conjunction with the accompanying drawings.

[0099] figure 1 It is a scene diagram of the Internet of Vehicles. All the vehicles in the picture are connected together through the Internet. The roadside communication unit (RSU), the user (user), and the source node (source node) communicate through wireless.

[0100] In the present invention, source publish content (SPC, sourcepublish content) is divided into static content items (SC-SPC) and dynamic content items (DC-SPC) according to whether the published content will change with time. The context information (CIF) reflects the changes of the surrounding environment over time, which belongs to a dynamic content item (DC-SPC). Due to the dynamic nature of CIF, the source will generate a new content version to reflect the latest environment status, so RSU needs to refresh the content version to prevent users from obtaining outdated and invalid request...

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Abstract

The invention discloses a mobile edge cache placement method using the request arrival rate and the dynamicity of source publish content. The method is to solve the problem how to select a cached content set from massive dynamic content under the condition that the cache space of a road side unit is limited, so as to increase the data volume directly served by the road side unit cache to the greatest extent, so as to reduce the backhaul link pressure obviously. The method comprises the following steps: firstly, initializing a system to obtain parameters required by an execution method; then calculating a cache hit rate of the content; abstracting a cache placement problem as a 0 / 1 knapsack problem to obtain a cached content set; and enabling the road side unit to serve the user request. The method pays attention to dynamic content items, performs cache placement in a mode of jointly considering the request arrival rate and the dynamicity of the source publish content, ensures the timeliness of the content received by a user, and meanwhile, maximize the data volume directly served by a road side unit, so that redundant data transmission is remarkably reduced, and the backhaul link pressure is relieved.

Description

technical field [0001] The present invention relates to the cache placement processing method that carries out source publish content (SPC, source publish content) in the road side communication unit (RSU, road side unit), more particularly, refers to a request arrival rate ( λ) and the dynamics (μ) of DC-SPC to handle edge cache placement. Background technique [0002] In the field of Internet of Vehicles (IOV, internet of vehicles) technology, a roadside communication unit (RSU, roadside unit) is the infrastructure built on the roadside to realize the connection between the vehicle and the Internet. RSU follows the national standard GB20851, and the communication frequency is 5.8GHz for service. The RSU is composed of a high-gain directional beam control read-write antenna and a radio frequency controller. The high-gain directional beam control read-write antenna is a microwave transceiver module, responsible for signal and data transmission and reception, modulation and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L29/08
CPCH04L67/12H04L67/10Y02D30/70
Inventor 张珊罗洪斌王柳迪
Owner BEIHANG UNIV