February 27, 2024

The Wi-R protocol relies on body for data communication, consumes up to 100x less than Bluetooth

Author : Jean-Luc Aufranc | Editor : Anty | February 21, 2023 at 07:51 AM

The Wi-R protocol is a non-radiative near-field communication technology that uses Electro-Quasistatic (EQS) fields for communication enabling the body to be used as a conductor and that consumes up to 100x less energy per bit compared to Bluetooth.

In a sense, Wi-R combines wireless and wired communication. Wi-R itself only has a wireless range of 5 to 10cm, but since it also uses the body to which the Wi-R device is attached, the range on the conductor is up to 5 meters. While traditional wireless solutions like Bluetooth create a 5 to 10-meter field around a person, the Wi-R protocol creates a body area network (BAN) that could be used to connect a smartphone to a pacemaker, smartwatch, and/or headphones with higher security/privacy and longer battery life.

One of the first Wi-R chips is Ixana YR11 with up to 1Mbps data rate, and they are working on a YR21 IC supporting up to 20 Mbps.

Ixana YR11 key features:

  • Frequency – 1 to 20 MHz
  • Data rate – Up to 1 Mbps
  • Range – 2 to 5 meters on conductor, <10cm away
  • Peak current – 0.2 mA
  • Energy efficiency – < 0.1 nJ/bit

We can see a comparison between Wi-R and NFCNFMI (Near-Field Magnetic Induction), Bluetooth, and UWB in the table below provided by Axana.

In their white paper, the company goes through some of the use cases, benefits, and capabilities of Wi-R:

  • Communicate with Touch: Combine touch, intent, and communication in a single action
  • Pairing-free smart devices. The device can be used as soon as it is in contact with the body
  • Touch Selectivity: Transfer contacts with a fist bump
  • Multiple time-synchronized wearables: multiple body motion trackers can easily be supported
  • Ultra-low energy consumption: all-day, real-time, distributed AI
  • High-speed (for future chips like the YR21): Stream video from AR headset to smartphone
  • Physically secure due to the way the technology work plus an additional layer of security for sensitive data or action
  • Negligible Inter-Human Interference: Increases capacity of communication in a space with multiple humans with each having multiple wearables
  • Charging-free patches. Wi-R opens the door for long-lasting and even charging-free patches for many low-speed applications by lowering the communication energy by up to 100 times
  • Distributed computing in BAN: augmenting humans with real-time AI

It looks like it could even be fun for parties provided it works as demonstrated in the video below…

An obvious drawback compared to Bluetooth is that it must be in contact with your body or it’s not going to work. You can’t simply leave your smartphone on your desk or bed table and listen to music or audiobooks. Wi-R does not appear to be standardized, or at least not yet, and it will have to the integrated into smartphones to gain adaption, but with low adoption, manufacturers will not be interested in adding the protocol to their devices. It might be possible to add Wi-R through a smartphone cover which could help.

The company is already taking orders for the YR11 chip (100K MOQ) or a Wi-R Audio/Video communication module based on YR11 (10K MOQ), and if your company has plans to design or manufacture Wi-R devices you should be able to acquire evaluation kits either comprised for a board, a headphone kit, or an AR video camera kit for $899 to $2,299.99 depending on the items in the kit. Wi-R connectivity is added to the smartphone through a USB-C plugin, and an Android SDK is provided in each kit.

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- Source : Jean-Luc Aufranc

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