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Bluetooth Low Energy, Zigbee, and cognitive 3D-ICs add muscle to telehealth

2/10/2011 09:07 PM EST
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PierreG
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re: Bluetooth Low Energy, Zigbee, and cognitive 3D-ICs add muscle to telehealth
PierreG   2/16/2011 11:48:36 AM
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@ mizuno_takashi : Personally, I don’t believe that operating in the 900MHz band would have much value added as far as healthcare applications are concerned (for other application profiles such as ‘smart grid’ that could be a different story though). Sure you will get 8-9dB of extra link budget but the 802.15.4-2.4Ghz mode is already extremely robust, as pointed out in the article, and should you need to cover larger areas, you have the possibility to easily migrate from a star to a mesh-like networking topology. On the contrary, you should keep in mind that the 802.15.4-915MHz mandatory mode only transmits at 40kb/s (and not 250kb/s like in the case of the 2.4GHz mode). Meaning, it would take ~6x more time (and so energy) to transmit the same amount of data, which is somewhat detrimental IMO. In Bluetooth mode, it is indeed a BLE single mode device.

mizuno_takashi
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re: Bluetooth Low Energy, Zigbee, and cognitive 3D-ICs add muscle to telehealth
mizuno_takashi   2/16/2011 2:46:06 AM
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For zigbee mode, can the radio function at 900mhz too (or 2.4ghz only) for even more range? and for bluetooth mode, this is bluetooth low energy single mode, right? thank you

PierreG
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re: Bluetooth Low Energy, Zigbee, and cognitive 3D-ICs add muscle to telehealth
PierreG   2/12/2011 2:24:40 PM
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@ electronix79: with respect to your security questions, both standards are in line with HIPAA guidelines (security and privacy of health data) and have provisions for authentication, encryption, data integrity... That being said, there may be some “weaknesses” , under certain conditions, that you might want to be aware of. For instance, in the case of BLE, it would be fair to point out that the pairing/authentication process is done without a Diffie-Hellman exchange at the present time (so possible eavesdropping) and that several pairing methods have been defined (‘just works’ , ‘passkey entry’ and ‘out of band’). In the case of the ‘just works’ method, the Temporary Key, that is used, along with a random number and device addresses, to compute a ‘confirm value’ (that the other end of the communication link will have to recalculate and, if there is a match, pairing will then be confirmed), has a value set to 0. Moreover, the Short-Term Key, used to encrypt the connection following pairing, is also generated out of the Temporary Key and the random numbers having been exchanged during the pairing process. So, if you happen to be within range of the 2 devices at the right time, during the pairing process, it would be fairly easy for an attacker, in that case, to get your Short-Term key and decrypt traffic. As for your other questions, I cannot make any comments publicly at that time, as I guess you will understand, besides the fact that we provide complete IC system solutions (inc, HW, SW stacks, context and device manager, services and beyond…).

electronix79
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re: Bluetooth Low Energy, Zigbee, and cognitive 3D-ICs add muscle to telehealth
electronix79   2/11/2011 12:33:41 PM
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Is any hardware product planed to be ready in the near future? Any time when? What abou the software stack for both wireless transceivers? As for hardware control and also for the stacks? What about the security is it proved to be secure for this kind of applications?

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