báo cáo hóa học:" CDSWS: coverage-guaranteed distributed sleep/wake scheduling for wireless sensor networks" docx

... Corporation EURASIP Journal on Wireless Communications and Networking Volume 2007, Article ID 57054, 13 pages doi:10.1155/2007/57054 Research Article Distributed Time Synchronization in Wireless Sensor Networks ... the specific features and requirements of wireless sensor net- works call for alternative methods that improve both the computational complexity (and therefore energy...

Ngày tải lên: 22/06/2014, 19:20

... SNR performance of primary system for OSSS, SNR p with respect to P s σ 2 for different values of P p σ 2 . The c orresponding plot for sec- ondary system, SNR s , is shown in Figure 6. For compari- son ... Energy-harvesting-aware power management, in Wireless Sensor Networks, ed. by Bulusu N, Jha S (Artech House, Norwood, MA, 2005) 5. I Demirkol, C Ersoy, F Alagoz, MAC protocols...

Ngày tải lên: 21/06/2014, 03:20

... Corporation EURASIP Journal on Wireless Communications and Networking Volume 2010, Article ID 693158, 2 pages doi:10.1155/2010/693158 Editorial Physical-Layer Network Coding for Wireless Cooperative Networks Wen ... waveform so that the overall system performance including power efficiency and communication reliability can be significantly improved. However, due to the half-duplex constrai...

Ngày tải lên: 21/06/2014, 11:20

... surveillance, and underwater wireless sensor networks (UWSNs) for marine environment monitoring [1, 2]. A wireless sensor network (WSN) consists of spatially distributed sensors that cooperatively ... performance gap starts decreasing. This is because for very small value of θ 1 the sensors have very low correlation with the source and for very large value of θ 1 the correlati...

Ngày tải lên: 21/06/2014, 17:20

... dense sensor field (300 stationary sensors) Figure 7: Paths followed after 300 moving steps by a set of three mobile sensor nodes using the distributed path planning algorithm for different sensor ... words, we transform the sensor field area A into a grid G of size X × Y,whereX =R x /da and Y =R y /da (see Figure 1). Thus, we assume that any sensor s ∈ N is Stationary sensor...

Ngày tải lên: 21/06/2014, 22:20

... exponentially distributed [16, 22] and uniformly distributed [24]. In this article, we model it as a uniformly distributed random variable ranging from 50 cm to 400 cm. We compare the performance ... drawback for accurate localization within Ultra-Wideband (UWB) sensor networks. In this article, a comprehensive overview of the existing methods for localization in distributed UWB...

Ngày tải lên: 21/06/2014, 23:20

... information for wireless ad hoc networks,” IEEE Per- sonal Communications, vol. 8, no. 1, pp. 48–57, 2001. [7] Y. Xu, J. Heidemann, and D. Estrin, “Geogr aphy-informed en- ergy conservation for ... Rome, Italy, July 2001. [8] M. Zorzi and R. R. Rao, “Geographic random forwarding (GeRaF) for ad hoc and sensor networks: multihop perfor- mance,” IEEE Transactions on Mobile Computing, v...

Ngày tải lên: 22/06/2014, 19:20

... modeling The Friis transmission formula is rewritten below in a differ- ent form, as (7) is a well-known formula for RF transmission in a free space in a far-field region [24]. Since wireless sen- sors are ... decoders for the low-power requirements of wireless sensor networks. How- ever, even the analog decoders require distances of 5–10 m (3.5–7 m for 19% power amplifier efficiency)...

Ngày tải lên: 22/06/2014, 22:20

... platforms. We assess the applicability of the proposals for En- vMonitor. For a fair comparison, we separately compare the approaches for node platforms with enough resources, and then for platforms ... lines: wireless local area networking and wireless sensor networks, high-performance DSP/HW-based video encoding, and interconnection networks with design flow tools for heterog...

Ngày tải lên: 23/06/2014, 00:20

... nodes by our CDSWS is thereby smaller that that of CPA. 27 CDSWS: coverage-guaranteed distributed sleep/wake scheduling for wireless sensor net- works Guofang Nan ∗1 , Guanxiong Shi 1 , Zhifei ... into distributed sleep/wake scheduling schemes [8–11] and centralized sleep/wake scheduling mechanisms [12–16]. Gener- ally, centralized sleep/wake scheduling algorithm...

Ngày tải lên: 21/06/2014, 17:20