A selective downlink scheduling algorithm to enhance quality of VOD services for WAVE networks

Hsiao Hwa Chen, Shumao Ou, Kun Yang, Alex Galis

研究成果: Article同行評審

14 引文 斯高帕斯(Scopus)

摘要

Providing quality-of-service- (QoS-) guaranteed video on demand (VOD) services over wireless access in vehicular environments (WAVEs) is a challenge as WAVE adopts enhanced distributive channel access (EDCA), a contention-based channel access mechanism, for air interface access control. This paper proposes a selective downlink scheduling (SDS) algorithm to enhance the quality of VOD for WAVE networks. According to the importance of video decoding, video packets are categorized into high and low priorities. The categorized packets are put into different queues in roadside units (RSUs) to contend for transmission opportunities. Aiming to improve video playback quality and reduce video playback delay, the proposed SDS algorithm schedules video packets based on their importance, playback deadline, and their real-time parameters of receiving onboard units (OBUs), such as velocity and remaining dwelling time. The effectiveness of SDS algorithm is verified by simulations.

原文English
文章編號478157
期刊Eurasip Journal on Wireless Communications and Networking
2009
DOIs
出版狀態Published - 2009

All Science Journal Classification (ASJC) codes

  • 訊號處理
  • 電腦科學應用
  • 電腦網路與通信

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