the researchers Indian Institute of Technology (IIT) Mandi Working towards developing efficient remote powering and communication technology for futuristic Internet of Things (IoT) applications. This research includes applications such as battery-free wireless cameras, wireless monitors, sensors, skin-attachable sensing platforms, contact lenses, machine-to-machine communication and human-to-machine interaction.
Internet of Things (IoT) is a collection of objects (things) that can exchange data with each other via the Internet. IoT devices range from simple home appliances to sophisticated industrial and scientific equipment in a ‘smart’ home.
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These smart things are equipped with sensors, chips and software that must be powered up and in communication with other devices at all times. Simplified power sources such as batteries may be unsuitable for such applications because of the continuity of power required, and because some of these “things” may be embedded or hidden, making it difficult to replace batteries. Thus there is worldwide research to combine remote communication technology with remote power options.
The team researched two such power options – radio frequency energy harvesting (RF-EH) and backscatter communication. In RF-EH, energy is transmitted via radio waves to an IoT device by a dedicated transmitter, similar to the waves used in mobile phones for communication. In backscatter communication, electricity is transmitted via radio waves, as before, but with/without the need for a dedicated transmitter. Instead, RF signals available in the vicinity, such as WiFi, cell phone signals, etc., are used through reflection and backscatter to power IoT objects.
RF-EH and backscatter devices have their own strengths and drawbacks. For example, while the latter is associated with considerable energy savings compared to the former, it suffers from lower data rates and a shorter transmission range. The IIT Mandi team has leveraged the complementary nature of these two technologies and judiciously combine them to achieve the desired Quality of Service (QoS) and efficiencies by utilizing the power allocated to the system.
The findings of this study were published in Wireless Networks. The study was led by Dr. Siddhartha Sarma, Assistant Professor, School of Computing and Electrical Engineering, IIT Mandi, and his student Shivam Gujral, Ph.D. Scholar, School of Computing and Electrical Engineering, IIT Mandi.
Highlighting his research, Shivam Gujral, Ph.D. Scholar, School of Computing and Electrical Engineering, IIT Mandi, said, “We have developed a cooperative model involving backscatter communication and Radiofrequency Energy Harvesting (RF-EH) devices to better allocate resources such as time and antenna weights. work together. ,
Going into the technical aspects of this work, Dr Siddhartha Sarma, Assistant Professor, IIT Mandi mentioned, “We used a dedicated power transmitter for the two devices, with the backscatter device in a monostatic configuration and the information through the RFEH device. transferred to. HTTP protocol. The team used extensive numerical simulations to establish the superiority of the proposed cooperative scheme over existing schemes. In these simulations, the key parameters to analyze the performance of the model were varied.”
The researchers plan to implement the combined radiofrequency energy harvesting-backscatter communication system in real time to analyze the system’s performance. This would involve working on the hardware aspects of the two complementary technologies. The potential of the proposed system is vast and includes applications such as battery-free wireless cameras, wireless monitors, sensors, skin-attachable sensing platforms, contact lenses, machine-to-machine communications, and human-like applications, in addition to IoT devices. Two-machine interaction.
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