Báo cáo hóa học: " Research Article Collaborative Image Coding and Transmission over Wireless Sensor Networks" potx

... Processing Volume 2007, Article ID 70481, 9 pages doi:10.1155/2007/70481 Research Article Collaborative Image Coding and Transmission over Wireless Sensor Networks Min Wu 1 and Chang Wen Chen 2 1 MAKO ... 1 (b) Figure 4: Two routing schemes. tween images in sensors 1 and 2, sensors 2 and 3, sensors 4 and 5, and sensors 5 and 6, respectively. (c) At each sens...

Ngày tải lên: 22/06/2014, 23:20

... iterative encoding algorithm is proposed in Section 5. For a noisy situation, we consider the modified encoding algorithm in Section 6 and describe the decoding process and how to handle decoding errors ... Introduction In sensor networks, multiple correlated sensor readings are available from many sensors that can sense, compute and communicate. Often these sensors are battery-power...

Ngày tải lên: 21/06/2014, 08:20

... Introduction Wireless sensor networks (WSNs) [1] have increasingly drawn attentions of researchers in the areas of wireless communication, sensor technology, distributed systems, and embedded ... Computing and Networking (MobiCom ’03), pp. 81–95, September 2003. [5] A. Srinivasan and J. Wu, “A survey on secure localization in wireless sensor networks,” Encyclopedia of Wirel...

Ngày tải lên: 21/06/2014, 11:20

... predis- tribution for wireless sensor networks,” EURASIP Journal on Wireless Communications and Networking, vol. 2006, Article ID 91304, 10 pages, 2006. [10] R. Anderson, H. Chan, and A. Perrig, “Key ... C. Karlof and D. Wagner, “Secure routing in wireless sensor networks: attacks and countermeasures,” in Proceedings of the 1st IEEE International Workshop on Sensor Netwo...

Ngày tải lên: 21/06/2014, 22:20

... setup, and assumptions. The network comprises of non-mobile wireless sensor nodes and a sink. We define the nodes as event reporting (E-REP), routing (E-R), reporting and routing (E-REP-R), and idle ... Sankarasubramaniam, and E. Cayirci, Wireless sensor networks: a survey,” Computer Networks, vol. 38, no. 4, pp. 393–422, 2002. [2] D. Culler, D. Estrin, and M. Srivastava, “...

Ngày tải lên: 21/06/2014, 23:20

... ζ 1 (4δ) is permanently lost. (c) The recovery table records the recovery status κ i at m = 4. The 0 and 1 in the current column stand for I d and I e ,respectively. sensor node, where ζ n (t) is the ... battery models and existing CDS construction algorithms. 2.1. Modeling battery discharge behavior The most commonly used batteries in wireless devices and sensors are nickel-cadmi...

Ngày tải lên: 22/06/2014, 19:20

... Technology, China, as a Ph.D. candi- date. His current research interests include wireless sensor network, wireless ad hoc network, wireless communication, and signal processing. Yanghee Choi received ... Multimedia and Mobile Communications Laboratory, School of Computer Science and En- gineering, Seoul National University in 2004 and 2005. His current research interests...

Ngày tải lên: 22/06/2014, 23:20

... the other hand, the IC is modeled by the average temporal overlap between SU and PU. The allocation of sensing period and transmission time for two access policies are investigated and analyzed ... infinitesimal. min {a, b} and max{a, b} denote the minimal and maximal value of a and b,respectively. PU SU 0 T 2T 3T 4T 5T (a) Access Policy 1 PU SU 0 T 2T 3T 4T 5T Spectrum sensing S...

Ngày tải lên: 21/06/2014, 11:20

... 10 8 m/sec). Moreover, the available bandwidth of underwater acoustic chan- nels is limited and dramatically depends on both transmission range and frequency. According to [8], nearly no research and commercial ... pages doi:10.1155/2010/195910 Research Article Efficient Vector-Based Forwarding for Underwater Sensor Networks Peng Xie, 1 Zhong Zhou, 2 Nicolas Nicolaou, 2 Andrew...

Ngày tải lên: 21/06/2014, 17:20

... and (p, q) is the corresponding private key preloaded before deployment, and (iii) the coverage area of the service sensor, which is determined in LKE by a grid size L, and specified in iPAK and ... attract EURASIP Journal on Wireless Communications and Networking 7 Each service sensor will establish a λ-collusion-resistent key space and serve those worker sensors residing in...

Ngày tải lên: 21/06/2014, 20:20