Abstract
The energy efficiency of Wireless Sensor Networks (WSNs) is considerably improved with Wake-up Radio (WuR) systems. However, their resilience to interference is often neglected in the literature. This might be an issue due to the proliferation of wireless devices and the growing field of internet of things. In this paper, we evaluate the impact of in-band interference from wireless devices on a WuR system. The approach proves that WuR systems are still performing well when coexisting with external wireless networks, even if the energy-efficiency is slightly reduced.
Highlights
Wireless Sensor Networks (WSNs) are exploited in numerous applications such as telemedicine, robotic, intrusion detection or environmental monitoring
The energy per bit is used to evaluate the energy-efficiency, and it is defined as the ratio of the total energy consumed by a node and the total number of correct bits received at the Base Station (BS)
The Bit Error Rate (BER) gives an indication of the data link at the BS. It is calculated as the number of bit errors divided by the total number of bits received at the BS
Summary
Wireless Sensor Networks (WSNs) are exploited in numerous applications such as telemedicine, robotic, intrusion detection or environmental monitoring. We evaluate the interference from an external wireless network such as WiFi devices on the WuR systems. Sensor nodes Wake-up Call (WuC) Sensor data WiFi access point WiFi devices WiFi communications. The WuR network is composed of a Base Station (BS) and N sensor nodes equipped with a WuRx. Data are requested by the BS through the WuC message, which triggers the WuRx for waking up the addressed node. An interferer network is added through WiFi devices, all of them sending data to the WiFi access point. Both networks are operating at 2.45 GHz with a different modulation type, which is On-Off Keying (OOK) for the WuR system and Quadrature Amplitude Modulation (16-QAM) for the WiFi devices. Number of access point Data size Inter packet arrival time Bit rate Transmission power
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