Vehicular ad hoc network is a solution for increasing road traffic demand.Non-safety messages are sent during the service channel interval.The slots during which the messages are sent are not decided prior to the tran...Vehicular ad hoc network is a solution for increasing road traffic demand.Non-safety messages are sent during the service channel interval.The slots during which the messages are sent are not decided prior to the transmission.If the reservation of slots is done during the control channel interval,then the non-safety messages can be transmitted without any collision and thus the network performance can be improved.Further,to improve the network performance,the safety packets can be scheduled in the queue according to the time remaining for which sender and receiver are in the range of each other.This work proposes and evaluates the performance of safety message scheduling and infotainment message reservation through a MAC protocol SSIR-MAC to ensure network stability by transmitting beacons without any collision.The safety messages are queued according to their deadline and the slots for the transmission of non-safety packets are reserved during the control channel itself.Further,a hybrid queue is proposed to decrease the delay of enqueue and dequeue operations.Evaluation through extensive simulation results demonstrates the strength of SSIR-MAC.Comparisons are made with IEEE 802.11p standard and with two existing protocols which are relevant to the proposed work.展开更多
A Mobile Ad hoc NETwork (MANET) is a dynamically formed self-configured network by an autonomous system of mobile nodes connected by wireless links. With the advancements of wireless technology, the necessity of Quali...A Mobile Ad hoc NETwork (MANET) is a dynamically formed self-configured network by an autonomous system of mobile nodes connected by wireless links. With the advancements of wireless technology, the necessity of Quality of Service (QoS) is increasing rapidly. Developing QoS constraint routing protocol for MANETs is still a challenging task. As the nodes are free to move randomly, most routing protocols for MANETs are susceptible to node mobility. As routing protocol has to decide which route is able to fulfill the requirement of the desired QoS, routing is the most important part to accomplish the specified application with desired QoS metrics. This paper is based on design of such a kind of proposed MANET algorithm that will estimate the available bandwidth throughout the path by assigning priority. Based on available bandwidth, packets are transferred from source to destination of the applications in queue based on priority. The proposed algorithm is implemented and simulated using NS-2 simulator. Results of our approach show that new protocol can significantly reduce overheads and decrease overall end-to-end delay.展开更多
文摘Vehicular ad hoc network is a solution for increasing road traffic demand.Non-safety messages are sent during the service channel interval.The slots during which the messages are sent are not decided prior to the transmission.If the reservation of slots is done during the control channel interval,then the non-safety messages can be transmitted without any collision and thus the network performance can be improved.Further,to improve the network performance,the safety packets can be scheduled in the queue according to the time remaining for which sender and receiver are in the range of each other.This work proposes and evaluates the performance of safety message scheduling and infotainment message reservation through a MAC protocol SSIR-MAC to ensure network stability by transmitting beacons without any collision.The safety messages are queued according to their deadline and the slots for the transmission of non-safety packets are reserved during the control channel itself.Further,a hybrid queue is proposed to decrease the delay of enqueue and dequeue operations.Evaluation through extensive simulation results demonstrates the strength of SSIR-MAC.Comparisons are made with IEEE 802.11p standard and with two existing protocols which are relevant to the proposed work.
文摘A Mobile Ad hoc NETwork (MANET) is a dynamically formed self-configured network by an autonomous system of mobile nodes connected by wireless links. With the advancements of wireless technology, the necessity of Quality of Service (QoS) is increasing rapidly. Developing QoS constraint routing protocol for MANETs is still a challenging task. As the nodes are free to move randomly, most routing protocols for MANETs are susceptible to node mobility. As routing protocol has to decide which route is able to fulfill the requirement of the desired QoS, routing is the most important part to accomplish the specified application with desired QoS metrics. This paper is based on design of such a kind of proposed MANET algorithm that will estimate the available bandwidth throughout the path by assigning priority. Based on available bandwidth, packets are transferred from source to destination of the applications in queue based on priority. The proposed algorithm is implemented and simulated using NS-2 simulator. Results of our approach show that new protocol can significantly reduce overheads and decrease overall end-to-end delay.
