Adaptive bitrate streaming in multi-user downlink NOMA edge caching systems with imperfect SIC
- Authors
- Dao, Nhu-Ngoc; Vu, Duc-Nghia; Na, Woongsoo; Hoang, Trong-Minh; Do, Dinh-Thuan; Cho, Sungrae
- Issue Date
- Jul-2022
- Publisher
- Elsevier B.V.
- Keywords
- Adaptive bitrate streaming; Edge caching system; Imperfect SIC; Multi-user downlink NOMA
- Citation
- Computer Networks, v.212
- Journal Title
- Computer Networks
- Volume
- 212
- URI
- https://scholarworks.bwise.kr/cau/handle/2019.sw.cau/58770
- DOI
- 10.1016/j.comnet.2022.109064
- ISSN
- 1389-1286
1872-7069
- Abstract
- Recently, mobile networks have witnessed an increasing dominance of video traffic streams to simultaneously distribute real-time contents to massive number of user devices. In this context, fifth-generation (5G) technologies and beyond expose their advanced new radio access interfaces to facilitate multi-user associations with successive interference cancellation (SIC)-based non-orthogonal multiple access (NOMA) mechanisms. However, the imperfectness of the SIC in reality may result in significant performance decrease in NOMA owing to inter-channel interference existence. Motivated by this observation, this paper studies adaptive bitrate streaming services given such a challenging transmission environment assumed. In this context, our objectives are to maximize the video bitrate (accordingly the video resolution) of the online streams while retaining the playback smoothness. The problem is transformed into a drift-plus-penalty balancing optimization, which is then resolved by an approximation algorithm. Numerical results highlight the outperformance of the proposed approach compared to existing algorithms in terms of video quality and smoothness in various system scenarios. © 2022 Elsevier B.V.
- Files in This Item
- There are no files associated with this item.
- Appears in
Collections - College of Software > School of Computer Science and Engineering > 1. Journal Articles
Items in ScholarWorks are protected by copyright, with all rights reserved, unless otherwise indicated.