Sensor-clouds are a combination of wireless sensor networks (WSNs) and cloud computing.\nThe emergence of sensor-clouds has greatly enhanced the computing power and storage capacity\nof traditional WSNs via exploiting the advantages of cloud computing in resource utilization.\nHowever, there are still many problems to be solved in sensor-clouds, such as the limitations of\nWSNs in terms of communication and energy, the high latency, and the security and privacy issues\ndue to applying a cloud platform as the data processing and control center. In recent years, mobile\nedge computing has received increasing attention from industry and academia. The core of mobile\nedge computing is to migrate some or all of the computing tasks of the original cloud computing\ncenter to the vicinity of the data source, which gives mobile edge computing great potential in\nsolving the shortcomings of sensor-clouds. In this paper, the latest research status of sensor-clouds\nis briefly analyzed and the characteristics of the existing sensor-clouds are summarized. After that\nwe discuss the issues of sensor-clouds and propose some applications, especially a trust evaluation\nmechanism and trustworthy data collection which use mobile edge computing to solve the problems\nin sensor-clouds. Finally, we discuss research challenges and future research directions in leveraging\nmobile edge computing for sensor-clouds.
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