Báo cáo hóa học: "Research Article A High-Accuracy Nonintrusive Networking Testbed for Wireless Sensor Networks" pptx

... store the packet. Therefore, data packets are piggybacked to update buffer state. When a sensor x sends out a data packet, it piggybacks its residual-buffer size in the frame header. If a neighbor ... Gardner, V. K. Varadan, and O. O. Awadelkarim, Microsensors, MEMS and Smart Devices,JohnWiley&Sons, New York, NY, USA, 2001. [20] J. L. Hill and D. E. Culler, “Mica: a wireless pla...

Ngày tải lên: 21/06/2014, 23:20

... synchronous transmission can be accomplished if the relative delays between the relay nodes are much smaller than the symbol duration. This is usually a reasonable assumption for low-rate WSN applications. ... from a significant performance degradation due to erroneous decisions if cen- soring is not applied. Fortunately, with censoring this perfor- mance degradation can be avoided and...

Ngày tải lên: 22/06/2014, 19:20

... localiza- tion process and marks itself a state after the localization. The sensor marks itself with an attacked state if it detects any attacked locator; otherwise, it marks itself with a safe state. ... safe state to current attacked state; (3) from previous attacked state to current safe state; and (4) from previous attacked state to current attacked state. Although the historical da...

Ngày tải lên: 21/06/2014, 11:20

... 10 (a) . We will refer to this extension as wavelet- TANGRAM. Next we compare wavelet-TANGRAM to TANGRAM for a few special attacks to demonstrate the feasibility of ex- tending TANGRAM. If an attacker ... captur ing the same scene at approximately the same camera orientation. A securit y goal of each node in a cluster is to send partial visual information, which we call shares to a...

Ngày tải lên: 22/06/2014, 23:20

... Oakland, Calif, USA, May 2003. [5] W. Du, J. Deng, Y. S. Han, P. Varshney, J. Katz, and A. Khalili, A pairwise key predistribution scheme for wireless sensor networks,” ACM Transactions on Information ... + n MAC sublayer Physical layer PPDU Physical Protocol Data Unit Frame Control Sequence Number Addressing Fields Data Payload FCS Frame Check Sequence MHR MAC Header MSDU MAC Servic...

Ngày tải lên: 21/06/2014, 22:20

... In [14], cars act as data mules and employ a carry-and-forward paradigm to transfer data packets to a portal. Finally, in [15], opportunistic data delivery is studied when both traditional routing and ... the formalization of a sociability concept and a guideline to its exploitation for efficient forwarding in DTNs. Additionally, a framework for its evaluation and comparison with...

Ngày tải lên: 21/06/2014, 11:20

... movement of gas back to nearby UAVs and take appropriate decisions concerning an evacuation plan. Embedding sensors in roadbeds, alongside highways, or bridge structures and placing cameras at street ... traveled as routing parameters. It is also based on a retransmission control mechanism to avoid intensive usage of the shortest path. Assuming sources transmitting data packets at a const...

Ngày tải lên: 21/06/2014, 17:20

... part of the network that carries control information Knowledge plane Control plane Data plane Management plane Figure 1: Autonomic architecture. (also known as signaling), and finally, the management ... entities responsible for maintaining the local and global view. One entity is responsible for the organization of locally available information from different layers in the local network st...

Ngày tải lên: 21/06/2014, 23:20

... HH-VBF can control forwarding redundancy by adjusting β. Each node that qualifies as a candidate forwarder delays the packet forwarding by an interval T adaptation which is computed the same way as ... forward the packet. We refer to such a node as a candidate forwarder for the packet. As in VBF, each candidate forwarder maintains a self- adaptation timer which depends on the desirab...

Ngày tải lên: 21/06/2014, 17:20

... natural physiological states without constraining their normal activities. They are used to develop a smart and a ordable health care system and can be a part of diagnostic procedure, maintenance ... [6]performsrealtime analysis of sensor s data, provides real time feedback to the user, and forwards the user’s information to a telemedicine server. UbiMon aims to develop a smart and...

Ngày tải lên: 21/06/2014, 23:20