Abstract
The emergence of Internet of Things (IoT) and high throughput satellite communication networks enables the capability of anytime, anywhere environment monitoring and sensing. A key challenge of satellite-based IoT is to enhance spectrum and energy efficiency so as to meet the ever-increasing demand for satellite bandwidth and dynamic access of a massive number of IoT terminals. In this paper, we propose a novel power control algorithm for IoT terminals being deployed in satellite-based IoT systems where some terrestrial base station is available to acquire IoT devices' information as well as to perform resource management. We adopted the Poisson point process (PPP) theory to formulate the model for this power optimization problem. The PPP theory is applied to evaluate the distance distribution of random IoT devices in this satellite-based networks. Optimal power control scheme can be obtained by taking into consideration user distribution and signal interference plus noise ratio (SINR) demand for various IoT terminals. In addition, due to the complexity of the objective function of power control deduced by the PPP theory, we utilize the pattern search method to identify an optimal solution in global area. Furthermore, we provide numerical results from various perspectives including user rates and energy efficiency to testify the performances of our power proposal.
Highlights
With the rapid development of low cost electronics and wireless communications, Internet of Things (IoT) has received extensive attention of the research community and enabled many cyber-physical applications [1]–[3]
When IoT devices are being deployed to mission-critical system, cybersecurity and privacy preservation mechanisms will be needed, which almost invariably lead to data expansion, putting on pressure on bandwidth demand
As current IoT standards, technology and references are mainly based on the cellular communication networks in terrestrial circumstances, research in satellite-based or space-based IoT is in its early stage
Summary
With the rapid development of low cost electronics and wireless communications, Internet of Things (IoT) has received extensive attention of the research community and enabled many cyber-physical applications [1]–[3]. IoT based on terrestrial network techniques has become more mature, yet it is still a challenge to meet the growing bandwidth demands of wireless communications for application scenarios where sensing and actuation functions in remote and isolated geographic areas are required. Satellite-based IoT has real world demand and wide application potential [4], [5]. The convergence of traditional satellite and space technology with IoT communications, and by integrating cloud and big data analytics, researchers are expecting the emergency of an era of Internet of Everything supported by nextgeneration networks
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