Báo cáo hóa học: " Research Article An Adaptive Time-Spread Multiple-Access Policy for Wireless Sensor Networks" pot

... colluding attackers A 1 and A 2 can communicate with each other via an attack link,locators L 4 , L 5 and L 6 can, therefore, communicate with the sensor S through the attack link. For L 6 , the Loc ... the distances to L 4 and L 5 as d 4 and d 5 , respectively, instead of the actual distances d  4 and d  5 . Consequently, the revised distance measurements d 4 , d 5 and d 6 will be co...

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, ... 802.15.4, “IEEE standard for Information Technology—Telecommunications and information exchange between systems—Local and metropolitan area networks— Specific requirements, Part 15.4 W...

Ngày tải lên: 21/06/2014, 22:20

... congestion avoidance and control protocols, rate adjustment mechanisms, fairness schemes, and transport protocols for wireless sensor networks are reviewed. In [8, 9], the major issues of transport layer protocols ... 2005. [9] C. Wang, K. Sohraby, B. Li, M. Daneshmand, and Y. Hu, “A survey of transport protocols for wireless sensor networks,” IEEE Network, vol. 20, no. 3, pp. 34–...

Ngày tải lên: 21/06/2014, 23:20

... sensors. 3.3. Performance analysis for GLRT decision rule For the optimum ML decision rule, a closed-form perfor- mance analysis does not seem to be feasible. However, for- tunately such an analysis ... N (cf. [14]) and therefore, the performance of the DSTBC improves notably with increasing number of transmitting sensors only until N sensors transmit. If more than N sensors transmit,...

Ngày tải lên: 22/06/2014, 19:20

... along the route of sensor 1, sensor 2, sensor 3, and remote sensor and another route of sensor 4, sensor 5, sensor 6, and remote sensor, respectively. (b) At sensors 2, 3, 5, and 6 apply the algorithm in ... spatial redundancy be- NN-1 N-2 3 2 1 (a) NN-1 N/2 + 1 N/2 2 1 (b) Figure 4: Two routing schemes. tween images in sensors 1 and 2, sensors 2 and 3, sensors 4 and 5, and sen...

Ngày tải lên: 22/06/2014, 23:20

... Advances in Signal Processing Volume 2009, Article ID 589413, 13 pages doi:10.1155/2009/589413 Research Article An Adaptive Approach to Granular Real-Time Anomaly Detection Chin-Tser Huang and ... importance than a comparison with other hosts network activity. For instance, it is obvious that a web server and standard workstation computer would have different network traffic loads. T...

Ngày tải lên: 21/06/2014, 22:20

... utilized. 4. PERFORMANCE ANALYSIS AND SIMULATION RESULTS In this section, computer simulations are conducted to assess the performance of the proposed method. To make an easy comparison in performance with ... structure and performance charac- teristics,” Journal of the Institute of Navigation, vol. 25, no. 2, pp. 121–146, 1978. [3] A. J. van Dierendonck, P. J. Fenton, and T. J. Ford, “Theo...

Ngày tải lên: 21/06/2014, 22:20

... transmit and two receive antennas with a single outdated channel estimate is similar to the perfor- mance of the system with three transmit antennas and one receive antenna, but with two outdated channel ... transmit antenna. The system with multiple trans- mit antennas can, of course, tolerate much higher Doppler rates or longer packets. For example, with three antennas and f m D = 0.2, th...

Ngày tải lên: 22/06/2014, 19:20

... 2002. [20] W. R. Heinzelman, J. Kulik, and H. Balakrishnan, Adaptive protocols for information dissemination in wireless sensor networks,” in Proceedings of the 5th Annual ACM/IEEE International ... will be allowed for packet forwarding. Thus, HH-VBF can control forwarding redundancy by adjusting β. Each node that qualifies as a candidate forwarder delays the packet forwarding by an...

Ngày tải lên: 21/06/2014, 17:20

... node-disjoint path can be longer and therefore expends significantly more energy than that expended on the primary path. Since this energy can adversely impact the lifetime and the performance of a sensor ... energy balance the wireless sensor network. The design and implementation of such an energy balancing algorithm/protocol has been reserved for future research work. As traditi...

Ngày tải lên: 21/06/2014, 17:20