Báo cáo hóa học: "Research Article A High-Accuracy Nonintrusive Networking Testbed for Wireless Sensor Networks" pptx
Báo cáo hóa học: " Research Article A Multievent Congestion Control Protocol for Wireless Sensor Networks" pptx
... store the packet.Therefore, data packets are piggybacked to update bufferstate. When a sensor x sends out a data packet, it piggybacksits 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 platform for ... schedule and data intervals.4.3.2. Data intervalEach node maintains slot intervals equal to their selected slotlength during their data interval. At the expiry of each slotinterval, a node...
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Báo cáo hóa học: " Research Article Censored Distributed Space-Time Coding for Wireless Sensor Networks" pptx
... synchronous transmission can be accomplished if the relative delaysbetween the relay nodes are much smaller than the symbol duration. Thisis usually a reasonable assumption for low-rate WSN applications. ... from a significantperformance degradation due to erroneous decisions if cen-soring is not applied. Fortunately, with censoring this perfor-mance degradation can be avoided and a performance ... we made in Figure 2, d decreases for increasing sig-nature vector length N for all K.Aswehavementionedbe-fore, the maximum achievable diversity order for DSTBC isN.ForagivenK, a smaller d allows...
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Báo cáo hóa học: " Research Article A Novel Secure Localization Approach in Wireless Sensor Networks" pot
... localiza-tion process and marks itself a state after the localization.The sensor marks itself with an attacked state if it detectsany attacked locator; otherwise, it marks itself with a safestate. ... 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 data obtained ... normal sensor nodes are then estimated byinteracting with locators to obtain the distance or angleinformation. Once the location information of at least threenoncollinear locators are available,...
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Báo cáo hóa học: "Research Article A Novel Distributed Privacy Paradigm for Visual Sensor Networks Based on Sharing Dynamical Systems" pptx
... 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 thesame scene at approximately the same camera orientation. A securit y goal of each node in a cluster is to send partial visualinformation, which we call shares to a base station or multi-ple ... INTRODUCTIONVisual data is an integral part of the interface between hu-mans and their environment. Visual data in the form of im-ages and video can be used to enhance a human operator’sability to reliably...
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Báo cáo hóa học: "Research Article Efficient Path Key Establishment for Wireless Sensor Networks" ppt
... 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 ... + nMACsublayerPhysicallayerPPDUPhysical Protocol Data UnitFrameControlSequenceNumberAddressingFieldsDataPayloadFCSFrame CheckSequenceMHRMAC HeaderMSDUMAC ServiceData UnitMFRMAC ... outperforms both ALG1 and ALG2.Finally, for a dense network (R= 12), ALG3 still performsbetter than both ALG1 and ALG2. Thus, ALG3 outperformsboth ALG1 and ALG2 across the full range of network...
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Báo cáo hóa học: " Research Article A Sociability-Based Routing Scheme for Delay-Tolerant Networks" doc
... In[14], cars act as data mules and employ a carry-and-forwardparadigm to transfer data packets to a portal. Finally, in [15],opportunistic data delivery is studied when both traditionalrouting and ... the formalizationof a sociability concept and a guideline to its exploitation for efficient forwarding in DTNs. Additionally, a framework for its evaluation and comparison with other schemes is alsopresented.In ... amongusers, reveals very important for studying the social behaviorof nodes and providing insight for potential delay-tolerantapplications. A variety of measurements have been made recentlyavailable...
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Báo cáo hóa học: " Research Article Modelling and Implementation of QoS in Wireless Sensor Networks: A Multiconstrained Traffic Engineering Model" pdf
... movement of gas back tonearby UAVs and take appropriate decisions concerning anevacuation plan. Embedding sensors in roadbeds, alongsidehighways, or bridge structures and placing cameras atstreet ... traveled as routing parameters. It is also based on a retransmission control mechanism to avoid intensive usageof the shortest path. Assuming sources transmitting datapackets at a constant rate, ... to compare the performanceof the four algorithms when looking at three performanceparameters: average packet delay, packet delivery ratio, andaverage energy consumption for both n= 2andn =4.TheresultsaredepictedbyFigure...
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Báo cáo hóa học: " Research Article A QoS-Aware Mesh Protocol for Future Home Networks Using Autonomic Architecture" pot
... part of the network that carries control informationKnowledge planeControl planeData planeManagement planeFigure 1: Autonomic architecture.(also known as signaling), and finally, the management ... entitiesresponsible for maintaining the local and global view. Oneentity is responsible for the organization of locally availableinformation from different layers in the local network stackand the other data ... paths based on eachapplication requirements; one with higher bandwidth for theFTP traffic (because node 11 has a limited bandwidth of onlyTable 2: Scenario 1 parameters.Parameter ValueTransmission...
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Báo cáo hóa học: "Research Article Efficient Vector-Based Forwarding for Underwater Sensor Networks" ppt
... HH-VBF can control forwardingredundancy by adjusting β.Each node that qualifies as a candidate forwarder delaysthe packet forwarding by an interval Tadaptationwhich iscomputed the same way as ... forward the packet. Werefer 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 desirableness factor.The ... propose a self-adaptation algorithm for VBF to allow each node toestimate the density in its neighborhood (based on localinformation) and forward packets adaptively.Desirableness Factor. We...
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Báo cáo hóa học: "Research Article On PHY and MAC Performance in Body Sensor Networks" pptx
... natural physiological states without constraining theirnormal activities. They are used to develop a smart and a ordable health care system and can be a part of diagnosticprocedure, maintenance ... [6]performsrealtimeanalysis of sensor s data, provides real time feedback to theuser, and forwards the user’s information to a telemedicineserver. UbiMon aims to develop a smart and a ordablehealth ... anechoic chamber with a tank and a log periodic antenna separated by 3 m. Usingthe antenna parameters and the measured signal power, theERP is calculated. Clearly, the ERP increases from a 1 cmdepth...
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