Abstract
In recent years, the rapid advancements in Internet of Things boost the utilization of Wireless Sensor Network (WSN). Through WSN, a huge amount of various kinds of data can be acquired from different environments, which further facilitate us to harness the world we live. However, the error-prone and unpredictable natures of wireless links significantly impair the quality of data transmission and the utility of acquired data in WSN. Therefore, to solve this crucial problem, this paper focuses on data access control and hybrid transmission control of WSN. Based on the mathematical models of the two control operations, an intractable optimization problem is first formulated with numerous considerations, including data utility, energy consumption, network stability and data loss rate. Because of the complexity and intractability of the originally formulated problem, a Lyapunov function-based network optimization theory is utilized to transform and decompose it into three relatively simple subproblems. Stochastic Data Scheduling Mechanism (SDSM) is designed based on the solutions to the three subproblmes. The optimality and implementation of SDSM are also analyzed. Finally, the performance of SDSM is demonstrated through extensive evaluations.
Highlights
Nowadays, Wireless Sensor Networks (WSN) are widely utilized in the Internet of Things (IoT) [1]
The error-prone and fragile wireless link is the bottleneck of WSN which greatly influences its performance of data transmission
To address the above challenges, this paper focuses on two essential control operations of WSN including data access control and hybrid transmission control
Summary
Wireless Sensor Networks (WSN) are widely utilized in the Internet of Things (IoT) [1]. The data access and hybrid transmission are seldom jointly researched and optimized It results in a serious imbalance between data utility and network stability. Because of the limitation of implemented optimization method and theory, current researches of data access and transmission in WSN mainly focus on a few considerations. Based on the established models, an intractable optimization problem is formulated with multiple considerations, including data utility, energy consumption, network stability and data loss rate. The mathematical models of data access in sensors and hybrid transmission of sensors’ wireless links will be established in following sections. Considering the error-prone and fragile nature of wireless links, we further denotes the data loss rate of transmission approach j (j ∈ M) in sensor i (i ∈ N ) at time slot t as Lij (t).
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