Design and Realization of a Prototype Hardware Platform for ...
Design and Realization of a Prototype Hardware Platform for ...
Design and Realization of a Prototype Hardware Platform for ...
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The MegaWatch Wireless <strong>Plat<strong>for</strong>m</strong>Master's Thesis - Emanuel Corthay5 Preliminary research5.2 Swatch GSM phoneDeveloped at Azulab, the Swatch group laboratory, this working watch GSMphone is only a prototype, <strong>and</strong> is not commercialized. Apparently, thegroup is not planning on launching this product at the moment <strong>for</strong> severalreasons.A nice product, but again it uses GSM which is not suited <strong>for</strong> ad hocnetwork experiments. In addition, as mentioned above, it is only at theprototype stage with no near term commercial prospects.5.3 Swatch Syncro BeatThis commercial product allows its possessor to exchange smallamounts <strong>of</strong> data between compatible watches using sounds.In<strong>for</strong>mation like business cards, alarms <strong>and</strong> melodies can betransmitted by pressing a button <strong>and</strong> maintaining the watches closeto each other. So called compatibility tests can be done, indicatinghow “compatible” the person is with its peer according to a certainnumber <strong>of</strong> criteria.In the same way, the watch can exchange data with a computerequipped with a sound card <strong>and</strong> a microphone.The wireless link is audio here, <strong>and</strong> cannot exceed a range <strong>of</strong> 1-2meters, making it unusable <strong>for</strong> our application.5.4 Micros<strong>of</strong>t SPOT watchesMicros<strong>of</strong>t's Smart Personal Objects Technology initiative aims to trans<strong>for</strong>meveryday small objects like watches, key chains <strong>and</strong> pens into intelligent,communicating devices. The watch “wrist net” project uses FM broadcast stationsto receive (only) the data modulated on a sub-carrier frequency, very similar to theEuropean Radio Data System (RDS).The first SPOT watches arrived in stores at the beginning <strong>of</strong> 2004, <strong>and</strong> <strong>of</strong>fer realtime weather <strong>and</strong> stock market in<strong>for</strong>mation, as well as paging capability. It comeswith a subscription system depending on what in<strong>for</strong>mation the user wants toreceive.This is a one-way, very low data rate wireless system that doesn’t fulfil our requirements.5.5 WiseNET (CSEM)The main objective <strong>of</strong> this research ef<strong>for</strong>t is to develop a low-power wireless ad-hoc network made<strong>of</strong> many distributed microsensors that are energetically autonomous (usually battery operated) <strong>and</strong>able to communicate amongst them <strong>and</strong> with the external world.Today, much <strong>of</strong> their ef<strong>for</strong>t is focused on developing a very low-power radio transceiver that canoperate from a single 1.5 V battery <strong>and</strong> last more than 5 years. The radio <strong>and</strong> the wireless protocol19 / 83
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