Abstract
Vehicular Delay-Tolerant Network (VDTN) is a special case of Delay-Tolerant Network (DTN) in which connectivity is provided by movement of vehicles with traffic prioritization to meet the requirements of different applications. Due to high node mobility, short contact time, intermittent connectivity, VDTNs use multi-copy routing protocols to increase message delivery rates and reduce the delay. However due to limited resources (bandwidth and storage capacity), these protocols cause the rapid buffer overflow and therefore the degradation of overall network performance. In this paper, we propose a buffer drop policy based on message weight by including traffic prioritization to improve the high priority messages delivery delay. Thus, the memory is subdivided into a high-weight queue and a low-weight queue. When the buffer is overflowing, and a new message arrives, the algorithm determines the message to be dropped in the queues considering that the current node is the destination of the message, the position of the current node with respect to the destination of the message and the age of the messages in the network.
Highlights
INTRODUCTIONDelay-Tolerant Network (DTN) is an environment characterized by intermittent connection, long or variable delays, asymmetric data rates, and high message loss rates [1, 2]
Delay-Tolerant Network (DTN) is an environment characterized by intermittent connection, long or variable delays, asymmetric data rates, and high message loss rates [1, 2].The Vehicular Delay-Tolerant Network (VDTN) is a special case of DTN in which connectivity is provided by nodes with high mobility
In order to avoid the resources monopolization by high priority messages at the expense of lower priority messages and to improve the delivery rate of these messages, buffer management strategies propose a message weight metric that does not take into account the priority class of service (CoS) required for VDTN
Summary
Delay-Tolerant Network (DTN) is an environment characterized by intermittent connection, long or variable delays, asymmetric data rates, and high message loss rates [1, 2]. The Vehicular Delay-Tolerant Network (VDTN) is a special case of DTN in which connectivity is provided by nodes (vehicles) with high mobility. To increase delivery rate and reduce delay, VDTNs use multi-copy routing protocols [5,6,7,8] that replicate messages across all nodes in the network. In order to avoid the resources monopolization by high priority messages at the expense of lower priority messages and to improve the delivery rate of these messages, buffer management strategies propose a message weight metric that does not take into account the priority class of service (CoS) required for VDTN. In this article, we propose a buffer management strategy based on the messages weight in the buffer which increases the messages delivery rate whatever the priority of the message but reduces the high priority messages delivery delay.
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
