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

作　　者：Tian DANG Chenxi LIU Xiqing LIU Shi YAN 

机构地区：[1]State Key Laboratory of Networking and Switching Technology,Beijing University of Posts and Telecommunications,Beijing,100876,China

出　　处：《Frontiers of Information Technology & Electronic Engineering》2022年第1期73-85,共13页信息与电子工程前沿（英文版）

基　　金：Project supported by the Beijing Natural Science Foundation,China(No.JQ18016);the National Key R&D Program of China(No.2020YFB1806703);the National Natural Science Foundation of China(Nos.62001047,61901315,and 61901044);the National Program for Special Support of Eminent Professionals,China,the Young Elite Scientist Sponsorship Program by China Institute of Communications,and the Project of China Railway Corporation(No.P2020G004)。

摘　　要：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：Virtual reality delivery Fog radio access network(F-RAN) Round-trip latency Resource allocation 

分 类 号：TN92[电子电信—通信与信息系统] TP391.9[电子电信—信息与通信工程]