Hybrid RF-VLC system could reduce power consumption in wireless networks

Wi-fi web helps the day by day actions of numerous folks worldwide, starting from their skilled communications to web searching and the streaming of flicks or TV collection. This spiking demand for wi-fi web entry goes hand in hand with larger energy consumption, which in flip contributes to carbon emissions worldwide.

Future wi-fi networks ought to be capable to assist the excessive computational calls for of many fashionable functions and web providers, whereas limiting energy consumption. Some researchers have thus been creating vitality environment friendly methods supporting communication between units and the sharing of media or different info on-line.

One among these options is called visible light communication (VLC). This can be a technique to appreciate environment friendly wi-fi communication utilizing seen gentle to transmit knowledge, counting on light-emitting diodes (LEDs) or different synthetic gentle sources.

Researchers at Central College (CU), IIDM and CU J&Okay in India just lately developed a brand new hybrid strategy that merges VLC with RF communication. Their proposed hybrid resolution, launched in a paper published in IEEE Transactions on Inexperienced Communications and Networkingmay allow dependable communication in indoor environments with a excessive knowledge transmission price, whereas consuming much less vitality.

“There’s a must lower the carbon footprint within the environment and in addition make the community secure and dependable,” Haneet Kour, Rakesh Kumar Jha and Sanjeev Jain wrote of their paper. “We propose a hybrid system of RF (Radio Frequency) and VLC (Visible Light Communication) for indoor communication that can provide communication along with illumination with less power consumption. The hybrid network is viable as it utilizes power with respect to the user demand and maintains the required Quality of Service (QoS) and Quality of Experience (QoE) for a particular application in use.”

The wi-fi communication system devised by this crew of researchers has two key parts: a transmitter and a receiver module. These two modules are bodily separate from one another, but they’re linked by way of a VLC channel.

As advised by its identify, the transmitter transmits binary knowledge saved inside it within the type of LED-produced gentle. The crew additionally suggest using modulation schemes that assist to keep up a steady stream of knowledge, whereas additionally maintaining the typical energy consumed at a continuing worth all through communication.

The receiver, then again, is comprised of a photo-sensitive machine, which might be a photodiode or a digicam. This machine can extract the knowledge contained within the gentle emitted by the receiver if the transmitting machine is in its line of sight.

Kour, Kha and their colleagues carried out an preliminary analysis of their proposed indoor wi-fi communication system utilizing varied simulation platforms. Their findings recommend that the system may allow steady communication between units in the identical indoor atmosphere, with important vitality financial savings.

“A comparative analysis for RF communication, Hybrid (RF+ VLC) and pure VLC is made and simulations are carried out using Python, Scilab and MathWorks tool,” Kour, Jha and Jain wrote of their paper.

“The proposal achieves high energy efficiency of about 37 low Specific Absorption Rate (SAR), lower incident and absorbed power density, complexity and temperature elevation in human body tissues exposed to the radiation. It also enhances the battery lifetime of the mobile device in use by increasing the lifetime by approximately 7 hours as validated from the obtained results.”

The latest examine by this crew of researchers contributes to ongoing efforts aimed toward decreasing power consumption and electromagnetic radiation by enhancing the energy-efficiency of wi-fi communications. The preliminary simulations they run spotlight the promise of their strategy, which might be additional improved and examined in future research.

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