Sub-gigahertz technologies based fast message delivery in VANETs
Jetendra Joshi, Praveen Medikonda, Rahul Siriponnala Raja, Debasis Das · 2017
The message delivery ratio in opportunistic networks, strongly depends on the transmission time over users, which is closely related either to the mobility of users and to the communication properties of the mobile devices. Therefore the message dissemination can be improved with a longer radio transmission range. In this paper, we appraise the use of a sub-gigahertz wireless technology, called LoRa (Long Range), to establish links between the mobile nodes in a mobile opportunistic network in order to increase the number of contacts and their duration. We appraise the performance of LoRa, comparing it with Wi-Fi, using the Gossip protocol for message dissemination with realistic vehicular traces. Through simulations, we compare the network overhead and message delivery probability. These simulations were carried out using the ONE simulator. We also evaluate the performance parameters of LoRa using LoPy module by Pycom and its Python IDE, Pymakr. The results show that, in mobile opportunistic networks, increasing the range increases the message delivery ratio, even while reducing the available bandwidth.