D2D协作边缘缓存系统中基于传输时延的缓存策略

蔡艳; 吴凡; 朱洪波

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

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D2D协作边缘缓存系统中基于传输时延的缓存策略

学术论文 | 更新时间：2024-06-05

- D2D协作边缘缓存系统中基于传输时延的缓存策略
- Caching strategy based on transmission delay for D2D cooperative edge caching system
- 通信学报 2021年42卷第3期页码：183-189
- 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：
  
  [ "蔡艳（1974- ），女，四川南充人，博士，南京邮电大学副教授、硕士生导师，主要研究方向为认知无线电、D2D 通信、物联网与无线通信等。" ]
  [ "吴凡（1995- ），男，江苏南京人，南京邮电大学硕士生，主要研究方向为边缘计算、D2D通信等。" ]
  [ "朱洪波（1956- ），男，江苏扬州人，博士，南京邮电大学教授、博士生导师，主要研究方向为物联网与无线通信、宽带移动通信、无线通信与电磁兼容等。" ]
- 基金信息：
  
  国家自然科学基金资助项目(61671251);国家自然科学基金资助项目(61871446);江苏省重点研发计划基金资助项目(BE2020084-5)
- DOI：10.11959/j.issn.1000-436x.2021042
  中图分类号： TN92
- 网络出版日期：2021-03，
  
  纸质出版日期：2021-03-25
- 稿件说明：
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蔡艳, 吴凡, 朱洪波. D2D协作边缘缓存系统中基于传输时延的缓存策略[J]. 通信学报, 2021,42(3):183-189.

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.
蔡艳, 吴凡, 朱洪波. D2D协作边缘缓存系统中基于传输时延的缓存策略[J]. 通信学报, 2021,42(3):183-189. DOI： 10.11959/j.issn.1000-436x.2021042.

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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