Two-layer distributed cache in D2D integrated fog-RAN

Chengyu XIA; Yanxiang JIANG

doi:10.11959/j.issn.1000-0801.2018143

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Two-layer distributed cache in D2D integrated fog-RAN

research and development | 更新时间：2024-06-05

- Two-layer distributed cache in D2D integrated fog-RAN
- Telecommunications Science Vol. 34, Issue 4, Pages: 49-56(2018)
- 作者机构：
- 作者简介：
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- DOI：10.11959/j.issn.1000-0801.2018143
  CLC： TN915
- Published Online：2018-04，
  
  Published：20 April 2018
- 稿件说明：
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Chengyu XIA, Yanxiang JIANG. Two-layer distributed cache in D2D integrated fog-RAN[J]. Telecommunications science, 2018, 34(4): 49-56.
DOI：

Chengyu XIA, Yanxiang JIANG. Two-layer distributed cache in D2D integrated fog-RAN[J]. Telecommunications science, 2018, 34(4): 49-56. DOI： 10.11959/j.issn.1000-0801.2018143.

摘要

随着移动通信的发展，人们对低时延的传输网络的要求也在急剧增长。雾无线接入网（fog-RAN）作为一种适用于5G/B5G通信网络的新型架构，拥有广阔的应用前景。考虑了集成D2D通信的雾无线接入网，提出了一种基于D2D通信和雾无线接入网的双层分布式缓存布置，希望以此降低用户下载文件的时延。首先得到了这种双层缓存的下载时延的闭式解以及这种布置方案相对于单层缓存布置方案的时延增益的闭式解。在此基础上，设计了分布式算法以求得最佳缓存布置策略，使得每个雾无线接入点（F-AP）或者用户设备（UE）只需要通过邻近设备的信息就能完成缓存。仿真结果显示，双层分布式缓存能够有效降低下载时延。

Abstract

With the development of mobile communications

people’s demands for low-latency transmission networks are rapidly increasing.Fog-RAN

as a new architecture suitable for 5G/B5G communication networks

has broad application prospects.Considering the fog network of device-to-device communication

a two-layer distributed cache based on device-to-device communication and fog-RAN was proposed to reduce the delay for users to download files.Firstly

a closed-form solution of the download delay of the two-layer cache and a closed-form solution of the delay gain were obtained.On this basis

a distributed algorithm was designed to obtain the best cache strategy

so that each fog-based wireless access point (F-AP) or user equipment (UE) only needed to use the information of the neighboring devices to complete the caching.The simulation results show that the two-layer distributed cache can effectively reduce the download delay.

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references

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