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IJESIT201302_90

IJESIT201302_90

ISSN: 2319-5967ISO

ISSN: 2319-5967ISO 9001:2008 CertifiedInternational Journal of Engineering Science and Innovative Technology (IJESIT)Volume 2, Issue 2, March 2013Table1. Different wireless technologies for telemedicineType Sub-type Frequency band Data transfer rateGSM GSM-900 900MHZ 9.6-43.3 kbpsGSM-1800 1800MHZ 9.6-43.3 kbpsGSM-1900 1900MHZ 9.6-43.3 kbpsGPRS GPRS 900/1800/1900MHZ 171.2kbpsWireless LAN IEEE 802.11a 5GHz 20MbpsIEEE 802.11b 2.4GHz 11MbpsHiperlan1 5GHz 20MbpsHiperlan2 5GHz 54MbpsBluetooth 2.4GHz 723.2MbpsSatellite ICO C,S band 2.4kbpsGlobalstar L,S,C band 7.2kbpsIII. PHYSIOLOGICALPARAMETERThe physiological parameters that are monitored are Electrocardiogram (ECG), heart rate derived from ECGsignals by determining the R-R intervals, blood pressure, body temperature, Galvanic Skin Response (GSR),Oxygen saturation in blood (SaO2), respiratory rate, Electromyogram (EMG), Electroencephalogram (EEG) andthree axis movement of the subject measured using an accelerometer [12].IV. CHALLANGESThe conventional physiological monitoring system used in hospitals cannot be used for wearable physiologicalmonitoring applications due to the following reasons. The conventional physiological monitoring systems are bulky to be used for wearableIridium L,Ka band 2.4kbpsCyberstar Ku,Ka band 400kbps-30MbpsCelestri Ka bandand 40-50GHz 155MbpsTeledesic Ka band 16kbps-64MbpsSkybridge Ku band 16kbps-2Mbpsmonitoring.[3]The sensors used in conventional monitoring systems are bulky and are not comfortable to wearfor longer durations [3].To overcome the above problems associated with the conventional physiological monitoring there is a need todevelop sensors for wearable monitoring and integrate them into the fabric of wearer and continuously monitor thephysiological parameters.V. WEARABLE TECHNOLOGYA. Wearable monitoring systemWearable physiological monitoring system consists of an array of sensors embedded into the fabric of the wearer tocontinuously monitor the physiological parameters and transmit wireless to a remote monitoring station. In theconventional wearable physiological monitoring system, the sensors are integrated at specific locations on the vestand are interconnected to the wearable data acquisition hardware by wires woven into the fabric. The drawback insensor system is that the cables woven in the fabric pickup noise such as power line interference and signals fromnearby radiating sources and thereby corrupting the physiological signals. Also repositioning the sensors in thefabric is difficult once integrated[8].Number of sensors integrated into the fabric form a network (Personal AreaNetwork) and interacts with the human system to acquire and transmit the physiological data to a wearable dataacquisition system. Fig SHOWS architecture of wireless sensor network based wearable physiological monitoringsystem.Itconsist of transmitter receiver system for sending data for physical parameter monitoring [12]575