In this paper, we consider safety message transmission in a dense vehicular network. With increasing vehicular network density, the collision rate increases when multiple vehicles transmit safety messages simultaneously. To address this issue, we propose a request-transmission split time division multiple access (TDMA) scheme, referred to as RTS-TDMA. In our scheme, we divide a frame into three phases, i.e., a contention access phase, a broadcast feedback phase, and a contention-free transmission phase. Each vehicle selects a repetition rate according to a given probability distribution and repeats the transmission of its request packet to improve the reliability of the request. In addition, a roadside unit acts as the coordinator and uses a successive interference cancellation technique to resolve request collisions. RTS-TDMA also reduces the request time percentage by containing only the vehicle identity in each request packet. Both theoretical analysis and numerical results verify that the RTS-TDMA scheme can provide higher throughput than the coded slotted ALOHA scheme.
@article{arxiv.1905.05431,
title = {A TDMA-like Access Scheme with Splitting Request and Transmission for Vehicular Networks},
author = {Shenglong Peng and Xuan He and Junyi Du and Yong Liang Guan and Liang Zhou},
journal= {arXiv preprint arXiv:1905.05431},
year = {2019}
}
Comments
2019 IEEE Wireless Communications and Networking Conference (WCNC)