TY - GEN
T1 - A new MAC layer protocol for safety communication in dense vehicular networks
AU - Sharafkandi, Sarah
AU - Du, David H
PY - 2010/12/1
Y1 - 2010/12/1
N2 - Traffic safety applications using VANET can significantly improve road safety if safety packets can be delivered on time. Therefore, a MAC layer protocol for VANET that can guarantee timely delivery of data is critical. Currently, the MAC layer standard that is supporting inter-vehicular communication is IEEE 802.11 which is a contention based protocol where all the vehicles contend for one common channel. This protocol can not guarantee an upper bounded delay for delivery of safety messages. To resolve this issue, we first obtain the theoretical lower bound on the delay for delivery of safety messages. Then, we introduce a novel MAC layer protocol for inter-vehicular communication that guarantees the delivery of safety messages within a certain upper bound. This upper bound is only within a constant factor from the theoretical lower bound. Our protocol is distributed and dynamic and easily adjusts to the topological changes in the network. Through analytical modeling and simulation, we show that using our MAC layer protocol, the delay in transmission only grows linearly with the number of vehicles even in the dense networks where IEEE 802.11 protocol causes unpredictable delays.
AB - Traffic safety applications using VANET can significantly improve road safety if safety packets can be delivered on time. Therefore, a MAC layer protocol for VANET that can guarantee timely delivery of data is critical. Currently, the MAC layer standard that is supporting inter-vehicular communication is IEEE 802.11 which is a contention based protocol where all the vehicles contend for one common channel. This protocol can not guarantee an upper bounded delay for delivery of safety messages. To resolve this issue, we first obtain the theoretical lower bound on the delay for delivery of safety messages. Then, we introduce a novel MAC layer protocol for inter-vehicular communication that guarantees the delivery of safety messages within a certain upper bound. This upper bound is only within a constant factor from the theoretical lower bound. Our protocol is distributed and dynamic and easily adjusts to the topological changes in the network. Through analytical modeling and simulation, we show that using our MAC layer protocol, the delay in transmission only grows linearly with the number of vehicles even in the dense networks where IEEE 802.11 protocol causes unpredictable delays.
UR - http://www.scopus.com/inward/record.url?scp=79955000496&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=79955000496&partnerID=8YFLogxK
U2 - 10.1109/LCN.2010.5735786
DO - 10.1109/LCN.2010.5735786
M3 - Conference contribution
AN - SCOPUS:79955000496
SN - 9781424483877
T3 - Proceedings - Conference on Local Computer Networks, LCN
SP - 637
EP - 644
BT - 2010 IEEE 35th Conference on Local Computer Networks, LCN 2010
T2 - 35th Annual IEEE Conference on Local Computer Networks, LCN 2010
Y2 - 10 October 2010 through 14 October 2010
ER -