RAMC: A RSU-Assisted Multi-Channel Coordination MAC Protocol for VANET
スポンサーリンク
概要
- 論文の詳細を見る
Dedicated Short Range Communication (DSRC) employs one control channel for safety-oriented applications and six service channels for non-safety commercial applications. However, most existing multi-channel schemes require all neighboring vehicles periodically (e.g. every 100 milliseconds) tune to the control channel for a full update of safety-oriented data before they can switch to the service channels for non-safety services. The safety exchange interval increases with the increase of traffic density. Consequently, under high traffic densities, the service channels are often completely idle while the control channel is congested. We propose a RSU Assisted Multi-channel Coordination MAC (RAMC) protocol that fully utilizes all channels to provide simultaneous safety and non-safety communications. Within the radio range of a roadside unit (RSU), vehicles are free to tune to any service channel. The RSU monitors all the safety messages being transmitted in both the control and service channels. Periodically, the RSU broadcasts a consolidated traffic view report to all neighboring vehicles in all channels. Therefore, a vehicle can operate in a service channel as long as it needs to achieve high throughput for non-safety applications, while maintaining adequate and timely safety awareness. Our simulation results show that the proposed RAMC protocol consistently achieves very high percentage of non-safety usage, while maintaining high safety message delivery ratios in various traffic density conditions.
論文 | ランダム
- 養豚を柱に、着実な規模拡大を--千葉県山田町 (有)サンライズファーム
- 地域の歴史を表現劇で再現--岩手県山田町立大沢小学校 (特集 第17回「教育奨励賞」努力賞受賞校)
- グラビア 逸品探険隊が行く!(14)野菜--千葉・山田町
- 土佐山田町龍河洞(りゅうがどう)洞穴遺跡の発見と近代考古学者寺石正路(てらいしまさみち)
- 産地紹介 都市近郊型野菜産地の歴史とそのメリットを生かした取り組み 滋賀県草津市北山田町のハウスダイコン生産