Title :
A probabilistic approach for V2V relay contention based on channel state information
Author :
Sok-Ian Sou ; Bing-Jyun Lin ; Yinman Lee
Author_Institution :
Inst. of Comput. & Commun. Eng., Nat. Cheng Kung Univ., Tainan, Taiwan
Abstract :
In a drive-thru Internet vehicular network, vehicles can communicate with access points (APs) for the Internet services. When a vehicle leaves the AP´s transmission range, it encounters intermittent connectivity and unreliable connection. Using vehicle-to-vehicle (V2V) relay can loosen the limitation of transmission coverage. However, the harsh conditions of wireless channel and the rapid change of vehicle topology remain the challenge for relay selection. The relay candidate with a better channel quality can forward the packet with a higher data rate. Therefore, the MAC layer mechanisms are needed to exploit the multi-rate capability in the PHY layer. This paper utilizes the channel state information to exploit good channel quality for the relay link between the sender and the receiver. The objective is to increase the opportunity of channel access for the relay candidate with better channel quality. Considering various issues, such as the collision probability, packet delivery ratio, and delivery delay, we propose an analytical model to dynamically configure the window size for channel contention. Numerical results show that the proposed method outperforms the basic DCF and distance-based DCF.
Keywords :
Internet; access protocols; probability; relay networks (telecommunication); telecommunication network topology; vehicular ad hoc networks; wireless channels; AP transmission range; Internet services; MAC layer mechanisms; PHY layer; V2V relay contention; VANET; access points; channel access; channel contention; channel quality; channel state information; collision probability; delivery delay; drive-thru Internet vehicular network; intermittent connectivity; multirate capability; packet delivery ratio; probabilistic approach; relay candidate; relay selection; transmission coverage; unreliable connection; vehicle topology; vehicle-to-vehicle relay; vehicular ad hoc network; window size; wireless channel; Delays; Fading; Media Access Protocol; Probabilistic logic; Relays; Vehicles; Wireless communication; Relay selection; contention window; received power; vehicular network;
Conference_Titel :
Wireless Communications and Networking Conference (WCNC), 2013 IEEE
Conference_Location :
Shanghai
Print_ISBN :
978-1-4673-5938-2
Electronic_ISBN :
1525-3511
DOI :
10.1109/WCNC.2013.6554615