Edge Caching Scheme Based on Value of Information Age in the Internet of Vehicles

LIN Zhi-jian; HOU Ying; CAO Xiao-xiao; WU Wen-hao; CHEN Xiao-pei; CHEN Ping-ping

doi:10.12263/DZXB.20221409

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Edge Caching Scheme Based on Value of Information Age in the Internet of Vehicles

PAPERS | 更新时间：2025-12-11

- Edge Caching Scheme Based on Value of Information Age in the Internet of Vehicles
- ACTA ELECTRONICA SINICA Vol. 51, Issue 12, Pages: 3410-3421(2023)
- 作者机构：
  
  福州大学电子信息工程系，福建福州 350108
- 作者简介：
- 基金信息：
  
  National Natural Science Foundation of China(62171135;62001117);Distinguished Young Scholars Program of Fujian Province, China(2022J06010)
- DOI：10.12263/DZXB.20221409
  CLC： TN929.5
- Received：16 December 2022，
  
  Revised：2023-09-16，
  
  Published：25 December 2023
- 稿件说明：
移动端阅览
林志坚,侯映,曹晓晓等.车联网中基于信息年龄价值的边缘缓存策略[J].电子学报,2023,51(12):3410-3421.

LIN Zhi-jian,HOU Ying,CAO Xiao-xiao,et al.Edge Caching Scheme Based on Value of Information Age in the Internet of Vehicles[J].ACTA ELECTRONICA SINICA,2023,51(12):3410-3421.
林志坚,侯映,曹晓晓等.车联网中基于信息年龄价值的边缘缓存策略[J].电子学报,2023,51(12):3410-3421. DOI： 10.12263/DZXB.20221409.

LIN Zhi-jian,HOU Ying,CAO Xiao-xiao,et al.Edge Caching Scheme Based on Value of Information Age in the Internet of Vehicles[J].ACTA ELECTRONICA SINICA,2023,51(12):3410-3421. DOI： 10.12263/DZXB.20221409.

摘要

随着第五代移动通信（5G）技术的快速发展，车联网（Internet of Vehicles，IoV）已成为5G的重要应用场景之一.针对IoV应用对即时性内容缓存的迫切需求，本文研究了支持动态内容缓存的移动边缘缓存方案以确保动态内容的时效性，该方案允许车辆从边缘缓存接入点（Caching-enabled Access Point，CAP）获得具有新鲜度约束的缓存内容.此外，本文基于协作缓存，利用概率论建立了CAP缓存刷新和交付的随机模型.同时，以基于信息年龄（Age of Information，AoI）的缓存命中率为IoV缓存的服务质量（Quality of Service，QoS）指标，建立了系统缓存命中的价值模型.为确保缓存内容的有效性，本文在分层切片框架中考虑了两种具有不同AoI要求的车辆内容请求.最后，本文提出了一个基于协作内容放置的系统内容缓存命中价值最大化的优化问题，这是一个NP-hard多目标多维多选择背包问题.因此，本文将其划分为若干个相互独立的优化问题并设计了一种基于内容年龄价值的最大增量算法进行求解.仿真结果表明，本文采用的CAP协作内容放置策略的性能优于其他传统方法.

Abstract

With the rapid development of the fifth generation (5G) mobile communications technology

Internet of vehicles (IoV) has become one of the important scenarios for 5G applications. Due to the urgent requirements of these applications for timely content caching

a dynamic content caching-enabled edge caching scheme is investigated to ensure timeliness

which allows vehicles to obtain cache content with freshness constraints from an edge caching-enabled access point (CAP). Furthermore

based on the idea of collaborative cache

a random model of CAP cache refreshing and delivery is established by probability theory. Meanwhile

considering the metric of hit rate with age of information (AoI) as the quality of service (QoS) index of IoV cache

a system model of caching performance value is developed. To ensure the effectiveness of content caching

two types of vehicular content requests with different AoI requirements are considered in a hierarchical slicing framework. Finally

the optimization problem to maximize the content caching value of cooperative content placement is formulated

which is a multi-objective

multi-dimensional and multi-choice knapsack problem and is proved to be NP-hard. Therefore

the problem is divided into several independent optimization problems

and a maximum incremental algorithm based on the age value of the content is designed to solve it. Simulation results show that the CAP cooperative content placement strategy outperforms other traditional methods.

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references

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