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Measuring Fatigue of Soldiers in Wireless Body Area Sensor Networks. Prepared by: Shah Faisal Iqbal. Outline. Motivation What is Fatigue??? Proposed protocol Placement of nodes Scenarios Energy analysis Radio model parameters Transmission model Simulations and results Comparison table
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Measuring Fatigue of Soldiers in Wireless Body Area Sensor Networks Prepared by: Shah Faisal Iqbal
Outline • Motivation • What is Fatigue??? • Proposed protocol • Placement of nodes • Scenarios • Energy analysis • Radio model parameters • Transmission model • Simulations and results • Comparison table • conclusion
Motivation • Wireless Body Area Sensor Networks (WBASNs) consist of on-body and in-body sensors on human body for monitoring health. • In WBASNs protocols are concerned with energy efficiency. • Specific mobility scenarios are not considered in previous protocols.
What is fatigue??? • Fatigue, physical or mental, is a subjective feeling of tiredness. • Physical fatigue is the inability of muscles to maintain optimal physical performance. • Fatigue is caused by loaded work, depression, boredom, mental stress, lack of sleep, etc.
Proposed protocol • For improvement of security, we must know the physical status of soldiers. • An important factor in physical status of soldier is fatigue. • If we know state of fatigue in soldier then we can send backup to them. • We propose a protocol for measuring fatigue of soldier.
Placement of nodes • Four sensors are attached on body of soldiers • Temperature sensor • Blood glucose level sensor • Heartbeat sensor • Base station
Cont… • Temperature sensor is placed on finger tip to measure temperature. • Blood glucose level sensor is also positioned on finger tip to measure glucose level in blood. • We assume that sensor takes blood samples periodically and checks glucose level in blood. • Heartbeat sensor is placed on heart to measure heartbeat. • BS is placed on wrist of soldier, all the above three sensors send their data to BS.
Cont… • Placement of nodes on soldiers body.
Scenarios • We take three scenarios for measuring fatigue of soldier. • Walking (3.0 miles per hour) • Slow running (5.0 miles per hour) • Fast running (7.0 miles per hour) • In all the three scenarios, sensors sense the heartbeat, glucose level and temperature and send their data to BS.
Cont… • For state of fatigue we use harris benedict formula. i.e. • BMR is the amount of energy required to maintain metabolic rate of body. • If soldier’s condition meets this level then this is called as state of fatigue.
Energy analysis • Energy consumption model used in paper is summarized in the following equations. Where: Etx= transmission energy Erx=Reception energy
Cont… ERXelec=Energy dissipated by radio to run circuitry for receiver ETXelec=Energy dissipated by radio to run the circuitry for transmitter Eamp=Amplification energy n=Path loss exponent K=Number of transmitted bits
Radio model parameters • Following are the parameters of radio model
Transmission of data • Figure shows sending of data from nodes to BS(server)
Simulation and results • We used MATLAB for simulation. • Our goals in conducting simulation are, • Measuring fatigue of soldier while walking, running slowly and running very fast. • Extension of sensor lifetime.
Life of sensor • From figure we can see that lifetime of sensors is more in walking scenario, because of less activities and sensor does not send data more often.
Throughput • Throughput of running scenario is higher then walking and slow running scenario because heartbeat increases faster and sensor has to send data.
Fatigue • For measuring fatigue, we set a threshold by harris benedict formula. • 1500 (joules) is set to be threshold in our simulations. • Figure in next slide shows the fatigue of soldier.
Cont… • When soldier is walking state of fatigue comes later compared with slow and fast running scenarios because of soldiers activity.
Sensor’s residual energy • In fast running scenario sensors drain off their energy quickly than walking and slow running scenario, as they are busy in getting data from soldiers body.
Comparison table • Comparison table of lifetime and throughput for three scenarios.
Table • Table shows the fatigue of soldier in rounds. • When soldier is walking his state of fatigue in the 10182th round.
conclusion • Routing protocol for measuring fatigue of soldier. • Performs better in terms of sensor lifetime and throughput.
Thank you Any Question ???