Caching strategy based on transmission delay for D2D cooperative edge caching system

Yan CAI; Fan WU; Hongbo ZHU

doi:10.11959/j.issn.1000-436x.2021042

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Caching strategy based on transmission delay for D2D cooperative edge caching system

Papers | 更新时间：2024-06-05

- Caching strategy based on transmission delay for D2D cooperative edge caching system
- Journal on Communications Vol. 42, Issue 3, Pages: 183-189(2021)
- 作者机构：
  
  南京邮电大学江苏省无线通信重点实验室，江苏南京 210003
- 作者简介：
- 基金信息：
  
  The National Natural Science Foundation of China(61671251);The National Natural Science Foundation of China(61871446);Jiangsu Provincial Key Research and Development Program(BE2020084-5)
- DOI：10.11959/j.issn.1000-436x.2021042
  CLC： TN92
- Online First：2021-03，
  
  Published：25 March 2021
- 稿件说明：
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Yan CAI, Fan WU, Hongbo ZHU. Caching strategy based on transmission delay for D2D cooperative edge caching system[J]. Journal on Communications, 2021, 42(3): 183-189.
DOI：

Yan CAI, Fan WU, Hongbo ZHU. Caching strategy based on transmission delay for D2D cooperative edge caching system[J]. Journal on Communications, 2021, 42(3): 183-189. DOI： 10.11959/j.issn.1000-436x.2021042.

摘要

为了满足 5G 系统低时延高可靠的需求，针对单缓存终端直传（D2D）协作边缘缓存系统，提出了一种基于传输时延的缓存策略。运用随机几何理论，将请求用户和空闲用户的动态分布建模为相互独立的齐次泊松点过程，综合考虑内容流行度、用户位置信息、设备传输功率以及干扰，推导出用户的平均传输时延与缓存概率分布的关系式。以平均传输时延为目标函数建立优化问题，提出了一个低复杂度的迭代算法，得到平均传输时延次优的缓存策略。仿真结果表明，该缓存策略在传输时延方面优于常见的几种缓存策略。

Abstract

To meet the requirements of 5G system with low delay and high reliability

for a single-caching D2D cooperative edge caching system

an optimization of the caching strategy based on transmission delay was proposed.The dynamic distributions of requesting users and idle users were modeled as the independent homogeneous poisson point process (HPPP) utilizing the stochastic geometry theory.Comprehensively considering the content popularity

user location information

device transmission power and interference

the relationship between the average transmission delay of user and the cache probability distribution was derived.Taking the average transmission delay as the objective function

the optimization problem was established

and a low complexity iterative algorithm was proposed to obtain the cache strategy with sub-optimal average transmission delay.Simulation results demonstrate that the proposed optimization cache strategy is superior to several common cache strategies in terms of transmission delay.

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references

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