Composite Routing Approach for Vehicular Delay-Tolerant Networks

Abstract

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In the vehicular delay-tolerant networks, (VDTN) association between the sources to the destination is not always achievable at any required period. Consequently, the carrier node saves the message in its intrinsic buffer until an opportunity occurs for forwarding. Fix nodes facilitate in message storage and message relaying. It also helps in improving the performance of VDTN. Considering the mobility of nodes, the bit error rate is high whereas the bit error rate in fixed nodes is comparatively low. In VDTN, bit error rate is not considered in most of the routing schemes. In this article, a composite routing approach is introduced to conquer aforementioned issues. Some features of vehicular ad hoc networks (VANET) are associated to PRoPHET routing protocol for VDTN. The propagation models of VANET are executed for mobile node communication and without it for VDTN. The effect of environmental hindrance is also considered, and this can be either positive or negative. This makes the composite routing approach two-dimensional and much competent. The simulation and performance analysis of the composite approach is done via opportunistic network environment (ONE) simulator. Results show that the composite routing approach outperforms the PRoPHET wrt. delivery ratio and average delivery delay.