Abstract
Mobile edge computing is proposed as a promising computing paradigm to relieve the excessive burden of data centers and mobile networks, which is induced by the rapid growth of Internet of Things (IoT). This work introduces the cloud-assisted multi-cloudlet framework to provision scalable services in cloudlet-based mobile edge computing. Due to the constrained computation resources of cloudlets and limited communication resources of wireless access points (APs), IoT sensors with identical computation offloading decisions interact with each other. To optimize the processing delay and energy consumption of computation tasks, theoretic analysis of the computation offloading decision problem of IoT sensors is presented in this paper. In more detail, the computation offloading decision problem of IoT sensors is formulated as a computation offloading game and the condition of Nash equilibrium is derived by introducing the tool of a potential game. By exploiting the finite improvement property of the game, the Computation Offloading Decision (COD) algorithm is designed to provide decentralized computation offloading strategies for IoT sensors. Simulation results demonstrate that the COD algorithm can significantly reduce the system cost compared with the random-selection algorithm and the cloud-first algorithm. Furthermore, the COD algorithm can scale well with increasing IoT sensors.
Highlights
With the rapid emergence and sharp growth of Internet of Things (IoT), enormous computation and communication requirements are induced, exceeding the capacity of current data centers and mobile networks [1,2,3,4]
This paper investigates the computation offloading decision problem of IoT sensors in the cloudassisted multi-cloudlet framework
Since IoT sensors are owned by different individuals that pursue diversified interests, decentralized computation offloading decisions should be made to mimic the selfish property of the sensor users
Summary
With the rapid emergence and sharp growth of Internet of Things (IoT), enormous computation and communication requirements are induced, exceeding the capacity of current data centers and mobile networks [1,2,3,4]. This paper investigates the computation offloading decision problem of IoT sensors in the cloudassisted multi-cloudlet framework. Solving the computation offloading problem of IoT sensors in the cloud-assisted multi-cloudlet framework is challenging. This work solves the computation offloading decision problem of IoT sensors based on game theory, which is widely adopted to analyze systems with multiple selfish individuals [27]. Another challenge is that the cloud-assisted multi-cloud framework has heterogeneous computation and communication resources. Due to the heterogeneous mobile networks (i.e., wireless access network and cellular network) in this framework, IoT sensors can have distinct energy consumption models when making different computation offloading decisions.
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