Abstract
Recently, low power wide area (LPWA) communication devices have attracted attention in the construction of wide area sensor networks. A type of LPWA device called a sub-GHz band communication device allows a 1-hop wide area communication system to have improved power consumption. However, a sub-GHz band communication system is not scalable due to the lack of compatibility with heterogeneous communication devices, such as WiFi and LTE. In this paper, we propose a sub-GHz band communication bridge that builds a cross-over communication system connecting a conventional TCP/IP network and LPWA network. The communication bridge enables scalable TCP/IP network services (e.g., HTTP) by transmitting an ethernet frame over an LPWA network. Through experiments using IM920, a dedicated device for 920 MHz band communication, we evaluated the performance and behavior of communication through TCP applications over a TCP/IP network and LPWA network connected by the proposed communication bridge.
Highlights
The Internet of Things (IoT) has led to diverse communication requirements
Through experiments using IM920, we evaluated the performance of communication in terms of the packet loss rate and round trip time (RTT)
We propose a communication bridge connecting a TCP/IP network and low power wide area (LPWA) network
Summary
The Internet of Things (IoT) has led to diverse communication requirements. For example, personal applications involving IoT have become common, such as the management of physical conditions by uploading data to the cloud using a wearable device. With the advent of the IoT era, a data aggregation system for various sensor devices is essential. To enable wireless sensor networks (WSNs) with wide area coverage and low cost devices, low power wide area (LPWA) communication devices have emerged in the past several years and have experienced rapid growth [2]. A sub-GHz band communication device, one of the most common LPWA devices, uses a frequency band lower than 1 GHz for communication, and provides wide-range and low-power communication. Because sub-GHz band communication meets IoT requirements, studies have developed WSNs using sub-GHz band communication devices [3]. Communication standards have emerged for sub-GHz band communication, each communication standard requires a communication device with a dedicated data transfer method and lacks compatibility with heterogeneous communication devices, such as WiFi and LTE [8]
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