Joint optimization and threshold structure dynamic programming with enhanced priority scheme for adaptive VANET MAC

Joanne Mun Yee Lim, Yoong Choon Chang, Mohamad Yusoff Alias, Jonathan Loo

Research output: Contribution to journalArticleResearchpeer-review

10 Citations (Scopus)

Abstract

Nodes in vehicular ad-hoc network (VANET) are highly mobile, traversing in unpredictable and varying environment. Therefore, contention window size and transmission power should adapt according to the high mobility transmission environment. In this paper, we propose an adaptive VANET medium access control (MAC) layer with joint optimization for VANET (MACVS) which aims at minimizing average delay and maximizing packet success rate. An adaptive joint optimization with proposed threshold structure dynamic programming, with closed loop feedback control system, is designed to optimize contention window size and transmission power. Adaptive optimization is done based on road traffic conditions and transmission reliable distance range (depicted by interference and noise), by monitoring the continuous change and threshold of received signal strength to interference and noise ratio. Mathematical expressions have been developed for the MACVS optimization framework, and the produced analytical results show good agreement with the simulation results. Simulations with different arrival rates and urban map of city center show that the proposed MACVS with low complexity joint optimization effectively reduces end-to-end delay while achieving high packet success rate under various network traffic condition.

Original languageEnglish
Pages (from-to)897-913
Number of pages17
JournalWireless Networks
Volume22
Issue number3
DOIs
Publication statusPublished - Apr 2016
Externally publishedYes

Keywords

  • Contention window
  • MAC
  • Optimization
  • Priority
  • Transmission power

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