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Khan Gul Waqar Comunication Laboratory Helsinki University of Technology Funded by

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 Helsinki University of Technology. Outline.

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Khan Gul Waqar Comunication Laboratory Helsinki University of Technology Funded by

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  1. 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 Helsinki University of Technology

  2. Outline • What is a Ad hoc wireless Network • 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

  3. 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

  4. Destination 3 2 5 4 6 1 Source

  5. 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.

  6. 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

  7. Main Limitations • Energy i.e. Batery life • Throughput

  8. Idea of my thesis work Energy saving but not at cost of throughput

  9. No RTS-CTS caseA ’Hidden Node’ Problem C B A

  10. RTS-CTS caseA solution for ’Hidden Node’ Problem CTS RTS CTS RTS-CTSCASE

  11. Exposed Node Problem - Capture Effect A B C D A B C D

  12. Routing- A random walk approach M C E H A G D

  13. 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

  14. 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

  15. Algo_7: Parallel Link C E RFR SFRRFRDRD A G D

  16. Signalling for Algo 7And timing Diagrams RFR = 352 Micro secSFR = 352 Micro secRFRD= 352 Micro secRD= 352 Micro sec Aeronet PC 4800Power Levels 1,5,20,50,100mW and -60dB Rx Sensitivity

  17. 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 7 4 27 4 37 4 67 10 6

  18. a. Algo_1 b. Algo_2 c. Algo_3 _A d. Algo_3_B

  19. a. Algo_4_A b. Algo_4_B c. Algo_5_A d. Algo_5_B

  20. Algo_6, A, B, C,D

  21. Simulation results Routing process

  22. Simulation results Data transfer

  23. Sample values with realistic values

  24. Number of hops -Latency

  25. 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

  26. Thank You ALL!! Questions ??

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