... ĐTVT K28 42 Đồ án tốt nghiệp Hình 4 .2: Luồng kiện cho file Tcl chạy NS • NAM Visual Simulation Mô ảo NAM • Tracing and Monitoring Simulation Mô Lần vết Giám sát IV.1 .2 Các đặc điểm NS2 NS -2 thực ... 4. 4: Topo khởi tạo mạng Nguyễn Duy Thanh - Lớp ĐTVT K28 46 Đồ án tốt nghiệp Hình 4. 5: Leach chu kỳ ( node đỏ Cluster-Head) Hình 4. 6: Leach ổn định chu kỳ đầu Nguyễn Duy Thanh - Lớp ĐTVT K28 47 ... so sánh giao thức chọn đường WSN hình 2. 1 hình 2.2 Hình 2. 1: Phân loại giao thức chọn đường WSN Nguyễn Duy Thanh - Lớp ĐTVT K28 16 Đồ án tốt nghiệp Hình 2. 2: Phân loại so sánh giao thức chọn đường...
... Environments 3 .4 Commercially Available WirelessSensor Systems 3.1 IEEE 145 1 and Smart Sensors 3.1 IEEE 145 1 and Smart Sensors 3 .2 Transducers and Physical Transduction Principles • Mechanical Sensors ... Networks 2.4Network Structure and Hierarchical Networks • Hierarchical Networks WIRELESS SENSOR NETWORKS 3.1 IEEE 145 1 and Smart Sensors 3 .2 Transducers and Physical Transduction Principles 3.3 Sensors ... foremost on sensory data from the real or1d Sensory data comes from multiple sensors of different modalities in distributed locations INTRODUCTION 2. COMMUNICATION NETWORKS 2. 1 Network Topology 2.2 Communication...
... We find its multiples in the form (x1, y1), (x2, y2)… • E.g., length = 20 0, multiples = (1, 20 0), (2, 100), (4, 50), (5, 40 ), (10, 20 ), (20 , 10), ( 24 , 5) • We choose the pair which will give the ... ISI-TR -20 05-603, 20 05 [ 14] I F Akyildiz, W Su, Y.Sankarasubramaniam, and E Cayirci, WirelessSensor Networks: A Survey”, Elservier Computer Networks, Vol.38 (4) , pp 393- 42 2 , March 20 02 [15] ... August 20 04 [4] A Mainwaring, D Culler, J Polastre, R Szewczyk, and J Anderson, Wirelesssensor networks for habitat monitoring”, Proceedings of the 1st ACM International workshop on Wireless sensor...
... energy-constrained sensor networks, April 20 04 49 ˘ [81] S Capkun and J.-P Hubaux Secure positioning in wireless networks IEEE Journal on Selected Areas in Communications, 24 (2) :22 1 23 2, 20 06 [ 82] D Wagner ... Netherlands, 20 04 [45 ] L Lazos and R Poovendran Secure broadcast in energy-aware wirelesssensor networks In IEEE International Symposium on Advances in Wireless Communications (ISWC’ 02) , 20 02 [46 ] L ... pre-distribution schemes for wirelesssensor networks In Proceedings of the 2nd ACM workshop on Security of Ad hoc and Sensor Networks (SASN ’ 04) , pages 43 – 52, New York, NY, USA, 20 04 ACM Press [38] C...
... -5 S 12 dB -10 -15 -20 -25 -30 -35 2. 1 Hình 11: 2.22. 3 2.42. 5 Frequency [GHz] 2. 6 2. 7 2. 8 2. 9 ết mô ph ng S 12 (S21) với có hông có he ch V anten phân cực kép cho access point WLAN 2, 4GHz với ... phản xạ S11 S 22 simulated Measured -5 -15 -20 -25 -30 -35 -40 Frequency [GHz] Hình 6: Hệ số phản xạ S 22 S 12 simulated Measured -5 -10 -15 S 12 dB S 22 dB -10 -20 -25 -30 -35 Frequency [GHz] Hình 7: ... 1. 84 12 c 2 ae r (1) Bán kính hiệu dụng patch tính công thức: 2h ae a 1 a r 0.5 a ln 2h 1.7 726 (2) Tần số cộng hưởng anten f r 2. 44 GHz Mạch in FR-4...
... Networks, 20 08, (1) International Journal of Next-Generation Networks (IJNGN),Vol.1, No.1, December 20 09 [3] X Du, H Chen, "Security in WirelessSensor Networks", IEEE Wireless Communications, 20 08 [4] ... "Negotiation-based protocols for disseminating information in wirelesssensor networks," Wireless Networks, vol 8, no 2- 3, pp 169-185, 20 02 [ 14] M.-J Lin, K Marzullo, and S Masini, "Gossip versus deterministic ... routing," in IEEE Infocom 20 02, 20 02 [16] Mona Sharifnejad, Mohsen Shari, Mansoureh Ghiasabadi and Sareh Beheshti, A Survey on WirelessSensor Networks Security, SETIT 20 07 10 ...
... embedded sensor networks Proceedings of The IEEE, Vol 91, No 7, July 20 03, 10 02- 1 022 Tubaishat, M & Madria, S (20 03) Sensor networks: an overview IEEE Potentials, Vol 22 , No 2, April 20 03, 20 -23 Energy ... Su, W.; Sankarasubramaniam, Y & Cayirci, E (20 02) A survey on wirelesssensor networks IEEE Communications Magazine, Vol 40 , No 8, August 20 02, 1 02- 1 14 Balanis, C (1997) Antenna Theory: Analysis ... Pages 27 44 Walsh M., Alavi S M M and Hayes M (20 08) On the effect of communication constraints on robust performance for a practical 8 02. 15 .4 WirelessSensorNetwork Benchmark problem Proc 47 th...
... Amacom, ISBN 0-8 144 -7168 -4, New York Akyildiz, I F.; Su, W.; Sankarasubramaniam, Y & Cayirci, E (20 02) Wirelesssensor networks: a Survey Computer Networks, Vol 38 No (20 02) , pp 393– 42 2 Al Saad, M., ... http://www.openarchitectureware.org Rafiq O & Cacciari, L (20 03) Coordination algorithm for distributed testing Journal of Supercomputing, Vol 24 , No (February 20 03), pp 20 3 -21 1, ISSN 0 920 -85 42 ScatterClipse, http://page.mi.fu-berlin.de/saad/ScatterClipse/video.htm ... International Conference on Sensor Technologies and Applications, pp 44 1 -45 0, ISBN 978-0-7695 -29 88 -2, October 20 07, Valencia, Spain, IEEE CS Press Al Saad, M.; Kamenzky, N & Schiller, J (20 08a) Visual ScatterUnit:...
... for wirelesssensor networks M L2B, D 14 =0 M L2B, D 04 =0 O BM M (m ED s) 95 0 1 12 2 24 44 8 squar e si ze ( km ^2) 896 Fig MED dependence on node density R & SR E B R M E: L2B, D 14 =0 R M E: L2B, ... E: L2B, D 04 =0 SR M B: L2B, D 14 =0 O BM SR M B: L2B, D 04 =0 1 12 2 24 44 8 squar e si ze ( km ^2) 896 Fig SRB & RE dependence on node density We also compare the performance of ML2B with maximum ... 6, no 1, 20 06, pp 35 48 J.-P Sheu, S.-C Tu, and C.-H Yu, “A distributed query protocol in wirelesssensor networks,” Wireless Personal Communications, vol 41 , no .4, Jun 20 07, pp 44 9 46 4 J Wu and...
... 50 40 30 20 50 40 30 20 10 10 0 0 .2 0 .4 0.6 0.8 1 .2 1 .4 0 .2 0 .4 0.6 0.8 1 .2 1 .4 Normalized deviation of sensor noise variances Normalized deviation of sensor noise variances (a) (b) Figure 2: ... using (27 ) as follows: N N 2bi ci2 2bi − wi = λ i=1 i=1 N ci2 ≥ 2bi − i=1 = β , U2 (35) and we conclude that λ∗ ≤ λ On the other hand, if all bi ≥ we can write 2bi − 2bi ≤ 2bi − ≤ 2bi − 2, (36) ... them to take real nonnegative values: N w i bi i=1 N ( 24 ) ci2 β subject to ≤ 2, (2bi − 1 )2 U i=1 ci2 wi b i + λ i=1 2bi − i =1 − β U2 (25 ) At the point of optimum we must have ∂L/∂bi = for i...