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

Tian DANG; Chenxi LIU; Xiqing LIU; Shi YAN

doi:10.1631/FITEE.2100308

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

Special Feature on Theory and Techniques for “Intellicise” Wireless Networks | Updated：2022-04-19

- Joint uplink and downlink resource allocation for low-latency mobile virtual reality delivery in fog radio access networks
  Enhanced Publication
- 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
- Frontiers of Information Technology & Electronic Engineering Vol. 23, Issue 1, Pages: 73-85(2022)
- Affiliations：
  
  State Key Laboratory of Networking and Switching Technology, Beijing University of Posts and Telecommunications, Beijing100876, China
- Author bio：
  
  E-mail: tiandang@bupt.edu.cn;
  ‡Corresponding author
  E-mail: liuxiqing@bupt.edu.cn;
  E-mail: yanshi01@bupt.edu.cn
- Funds：
- DOI：10.1631/FITEE.2100308
  CLC： TN914
- Received：30 June 2021，
  
  Accepted：14 September 2021，
  
  Published：0 January 2022
- Accepted：
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Tian DANG, Chenxi LIU, Xiqing LIU, et al. 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.
DOI：

Tian DANG, Chenxi LIU, Xiqing LIU, et al. 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. DOI： 10.1631/FITEE.2100308.

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。

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.

关键词

Keywords

references

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