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Recently, Mobile Crowd Sensing (MCS) has been used in many smart city monitoring applications, leveraging the latest smartphone features of sensing and networking. However, most of these applications use a direct internet connection for sending the collected data to the server through a 3G or 4G (LTE) network. This type of communication leads to higher bandwidth, battery consumption, and higher data plan cost. In this paper, we present a new ad-hoc tree-based routing protocol named MCS-RPL based on the IoT RPL protocol for the smart city context. The proposed protocol aims to utilize MCS opportunistically to support static Wireless Sensor Network (WSN) and to cover more sensing areas with less routing overhead and power consumption. MCS-RPL uses a grid-based cluster head to address mobility issues and reduce control packets. The conducted performance evaluation reveals that the proposed protocol outperforms RPL in terms of packet delivery ratio and power consumption due to control packet overhead reduction, which reached more than 75% in the tested scenarios.

Mobile Crowd Sensing RPL-based Routing Protocol for Smart City