Abstract
With increasing technological facilities, billions of sensor devices are deployed in the smart city, which allows to sense and collect the status and information of all kinds of infrastructures in the city. Those large number of sensing nodes form many self-organized wireless sensor networks (WSNs). Although the single WSN has been widely studied by researchers. However, few studies have focused on how to effectively connect to Internet of Things (IoT) and collect data in many decentralized WSNs of smart city with a low cost. In this paper, a cluster head rotation joint mobile vehicle data collection (CHR) scheme is proposed to effectively collect data from many decentralized WSNs in smart city with a low cost. In CHR scheme, each WSN selects one or multiple nodes which can connect to mobile vehicles as the cluster heads. Then all the in-network sensor nodes send their data to cluster head through multi-hop communication, due to the cluster head can connect to mobile vehicles, so when mobile vehicles pass by cluster head, the data of cluster head can be sent to mobile vehicles and brought to the data center to process. We first propose a single cluster head rotation joint mobile vehicle data collection (SCHR) scheme to collect data by only using a single CH in a WSN in which the CH rotation and clustering algorithms are carefully designed to balance in-network energy consumption. Then multiple cluster head rotation joint mobile vehicle data collection (MCHR) scheme is proposed to further balance the energy consumption and prolong the network lifetime in which multiple cluster heads are selected to be jointly responsible for the data collection task. The extensive experiments show that the CHR scheme has good performance in the network energy, network lifetime and network transmit capacity.
Highlights
With the rapid development of Internet of Things (IoT) [1], [2], cloud computing and 5G technology, it is possible to connect different kinds of things into the Internet
We propose two data collection schemes SCHR and MCHR through mobile vehicles in edge network of smart city
In SCHR, each wireless sensor networks (WSNs) selects one cluster heads (CHs), the CH rotation and clustering algorithm use the cost function based on the distance to the vehicle and residual energy
Summary
With the rapid development of Internet of Things (IoT) [1], [2], cloud computing and 5G technology, it is possible to connect different kinds of things into the Internet. In the sensing network of smart city, large number of sensing nodes are deployed by the needs of the applications, there is not even a basic communication device to connect to the Internet Such kind of network can be abstracted as several isolated WSNs composed of many sensors in smart city [15]. The research of [4] is a preliminary attempt, there are many other issues that are not addressed Their scheme only involves data collection problem of single sensing device along the road, they do not involve that the sensing devices in the smart city that can connect into many networks in a self-organized way. The CHR scheme can collect data for the sensing devices near the roads, and can effectively collect data in those self-organized WSNs if only one sensor node can connect with the mobile vehicles.
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