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Maximum Parallel Links based routing scheme with Power Control for Ad Hoc Wireless Sensors Networks
Khan Gul Waqar Comunication Laboratory Helsinki University of Technology Funded by Control Engineering Laboratory
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Outline What is a Ad hoc wireless Network My Thesis Topic
Important features of Ad hoc Neworks Ad hoc Sensor Netoworks Applications of Ad hoc Sensor Networks Main Criteria My Thesis Topic Motivation behind it 7 Differenent routing schemes Results Future work
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Important features of Ad hoc Neworks
No Base station or central control The established links are short-lived links multi-hop packet forwarding capabilities self-organizing
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Destination 3 2 5 4 6 1 Source
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Ad hoc Sensor Networks The number of nodes in a sensor network is very high Sensor nodes are densely deployed Sensor nodes are prone to failures The topology of a sensor network changes very frequently Sensor nodes are limited in power, computational capacities, and memory.
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Applications of Ad hoc Sensor Networks
Commercial and Military applications Industrial Control and Monitoring Home automation and consumer electronics Security and Military sensing Asset tracking and Supply chain management Intelligent agriculture and Environmental sensing (Temperature, humidity, soil make up and other environmental applications) Health care applications
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Main Limitations Energy i.e. Batery life Throughput
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Idea of my thesis work Energy saving but not at cost of throughput
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No RTS-CTS case A ’Hidden Node’ Problem
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RTS-CTS case A solution for ’Hidden Node’ Problem
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Exposed Node Problem - Capture Effect
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Routing- A random walk approach
E H A G D
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Seven Different Protocols (1/2)
Without Power Control Algo_1: Minimum Distance Algo_2: Maximum Distance Algo_3: Minimum Neighbors 3A: Nearest 3B: Farthest Algo_4: Maximum Neighbors 4A: Nearest 4B: Farthest C E A G D
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Seven Different Protocols (2/2)
With Power Control Algo_5: Minimum Distance 5A: Nearest 5B: Farthest Algo_6: Neighbors Based 6A: MinPowerMinNeighborsMinDistance 6B: MinPowerMaxNeighborsMinDistance 6C: MaxDifferenceOfNghbrsMinDist 6D: MinDifferenceOfNghbrsMinDist Algo_7: Parallel Link
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Algo_7: Parallel Link C E RFR SFR RFRD RD A G D
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Signalling for Algo 7 And timing Diagrams
RFR = 352 Micro sec SFR = 352 Micro sec RFRD= 352 Micro sec RD= 352 Micro sec Aeronet PC 4800 Power Levels 1,5,20,50,100mW and -60dB Rx Sensitivity
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Example with reference values
Matlab Environment is used Total_Num_nodes=10 SOURCE ID= 1 DESTINATION ID = 2 PathLoss=2; MinReqRxPower=0.4 (Units) PowerLevel1= 1(Units); PowerLevel2= 2(Units); PowerLevel3= 3(Units); PowerLevel4= 4(Units); PowerLevel5= 5(Units); T_RFR= T_SFR= T_RFRD= T_RD=2units
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a. Algo_ b. Algo_2 c. Algo_3 _A d. Algo_3_B
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a. Algo_4_A b. Algo_4_B c. Algo_5_A d. Algo_5_B
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Algo_6, A, B, C,D
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Simulation results Routing process
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Simulation results Data transfer
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Sample values with realistic values
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Number of hops -Latency
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Future work To implement the same idea for searching a set of routes instead of random walk To incorporate mobility More power level and continuous power control
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Thank You ALL!! Questions ??
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