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On-line Access: 2022-01-24

Received: 2021-06-30

Revision Accepted: 2022-04-22

Crosschecked: 2021-09-14

Cited: 0

Clicked: 4862

Citations:  Bibtex RefMan EndNote GB/T7714

 ORCID:

Tian DANG

https://orcid.org/0000-0002-9589-6967

Chenxi LIU

https://orcid.org/0000-0002-9134-1235

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Frontiers of Information Technology & Electronic Engineering  2022 Vol.23 No.1 P.73-85

http://doi.org/10.1631/FITEE.2100308


Joint uplink and downlink resource allocation for low-latency mobile virtual reality delivery in fog radio access networks


Author(s):  Tian DANG, Chenxi LIU, Xiqing LIU, Shi YAN

Affiliation(s):  State Key Laboratory of Networking and Switching Technology, Beijing University of Posts and Telecommunications, Beijing 100876, China

Corresponding email(s):   tiandang@bupt.edu.cn, chenxi.liu@bupt.edu.cn, liuxiqing@bupt.edu.cn, yanshi01@bupt.edu.cn

Key Words:  Virtual reality delivery, Fog radio access network (F-RAN), Round-trip latency, Resource allocation


Tian DANG, Chenxi LIU, Xiqing LIU, Shi YAN. Joint uplink and downlink resource allocation for low-latency mobile virtual reality delivery in fog radio access networks[J]. Frontiers of Information Technology & Electronic Engineering, 2022, 23(1): 73-85.

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year="2022",
publisher="Zhejiang University Press & Springer",
doi="10.1631/FITEE.2100308"
}

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Abstract: 
Fog radio access networks (F-RANs), in which the fog access points are equipped with communication, caching, and computing functionalities, have been anticipated as a promising architecture for enabling virtual reality (VR) applications in wireless networks. Although extensive research efforts have been devoted to designing efficient resource allocation strategies for realizing successful mobile VR delivery in downlink, the equally important resource allocation problem of mobile VR delivery in uplink has so far drawn little attention. In this work, we investigate a mobile VR F-RAN delivery framework, where both the uplink and downlink transmissions are considered. We first characterize the round-trip latency of the system, which reveals its dependence on the communication, caching, and computation resource allocations. Based on this information, we propose a simple yet efficient algorithm to minimize the round-trip latency, while satisfying the practical constraints on caching, computation capability, and transmission capacity in the uplink and downlink. Numerical results show that our proposed algorithm can effectively reduce the round-trip latency compared with various baselines, and the impacts of communication, caching, and computing resources on latency performance are illustrated.

雾无线接入网络中面向低时延移动虚拟现实分发的联合上下行资源分配

党甜,刘晨熙,刘喜庆,闫实
北京邮电大学网络与交换技术国家重点实验室,中国北京市,100876
摘要:雾无线接入网络(F-RAN)中,雾接入节点上部署了通信、缓存和计算功能,因此,F-RAN被认为是一种可使能移动虚拟现实(VR)应用的无线网络架构。为实现移动VR分发,高效的下行资源分配策略已被广泛研究,但同样重要的VR分发上行资源分配问题至今少有关注。本文研究了基于F-RAN的移动VR分发框架,并同时考虑上行和下行传输的影响。首先,通过刻画系统往返时延,揭示了通信、缓存和计算资源的影响。在此基础上,考虑缓存和计算容量以及上行和下行链路传输容量的约束,提出一种简单高效的往返时延最小化算法。仿真结果表明,与其他基准方法相比,本文所提算法可有效降低往返时延;阐明了通信、缓存和计算资源对往返时延性能的影响。

关键词:虚拟现实分发;雾无线接入网络;往返时延;资源分配

Darkslateblue:Affiliate; Royal Blue:Author; Turquoise:Article

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