Body area networks seek their own frequency band

All the evidence shows people have clear signs, as much as 48 hours ahead, before they get into a bind. If we can intervene in a timely fashion we save lives.
Written by Dana Blankenhorn, Inactive

Do body area networks deserve their own special frequency band? Even if some rights must be taken from airplanes or national defense?

(The Philips Heartcycle, a sensor-embedded shirt measuring heart functions, was announced last year. Picture from Crunchgear.)

A consortium within Advamed, the medical devices lobby, is presently pushing the FCC to give it rights to 40 MHz of frequency starting at about 2.360 GHz. That's just below the WiFi frequencies on your digital radio dial.

A decision is expected this summer, with pushback coming from the aeronautics and defense industries, which presently have use of the band. A study of the impact of those waves on the body has also begun.

Paul Coss, director of marketing for critical care, is Philips' point man on this issue. He said that if the allocation is given, a mass market of implantable and wearable devices could be created, using WiFi or cellular for backhaul, that can save lives and cut costs.

Philips has extensive work underway on body area networks, but only a subset of these applications would need dedicated spectrum, Coss said.

But why dedicated frequency, I asked. Why not take advantage of the current mass market for WiFi radios?

Because, he said, hospitals are already using that band to its maximum. "Hospitals don't want to put anything else in this space. It compromises paging, phone systems, streaming of digital images around the hospital. By giving us dedicated space we won't interfere."

The WiFi band is also being filled up at home, said technical lead Delroy Smith. "You cannot have life-critical events being disrupted by a Gameboy."

And the top end of this market would definitely be filled with life-critical events. Coss said a dedicated frequency band would allow better monitoring of patients in a hospital, and allow for earlier discharge.

"We're doing something like this with congestive heart failure patients, where we monitor weight, heart rate, level of oxygen in blood, collected by a device in the home, sent from any broadband. It keeps people from being readmitted.

"If by monitoring these people in the home we can catch them before they get to the tipping point where they need hospitalization, putting them on different fluid pills, you get better care and prevent expensive re-admission.

"But these devices aren't used on the scale or price point we think we can get to with the inband M-BAND initiative." (MBAND stands for Medical Body Area Network Device.)

I have been writing about this field since 2003, and quickly asked about non-critical patients, ordinary folks with hypertension or diabetes who might benefit from constant monitoring but don't need to notify doctors and hospitals until the condition becomes critical.

With a dedicated frequency, a mass market of radios, and systems that can interface with cellphones, there can indeed be an app for that, Coss said. The trick is to get a dedicated frequency and then work with groups like the IEEE 802.15 body to make these international standards on which a global market can be built.

"All the evidence shows people have clear signs, as much as 48 hours ahead, before they get into a bind. If we can intervene in a timely fashion we save lives. The expectation is not just the home environment but everyone in a hospital will have background monitoring, like a check engine light."

If like me you've lost a dear friend or mentor to a "sudden" heart attack, you can see the value. All I can say is godspeed, and you will see more reports on this topic soon.

This post was originally published on Smartplanet.com

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