Báo cáo hóa học: " A Complementary Code-CDMA-Based MAC Protocol for UWB WPAN System" pptx

... efficient MAC. A TDMA-based approach has many advantages over other similar techniques such as CSMA/CA and FDMA. Authors of [12] have provided a comparison between TDMA and CSMA/CA as shown in Table ... applications such as BAN. Another argument in favor of using out-of-band wakeup radio is that a wakeup radio-based scheme in BAN can save a significant amount of power. 2.2. M...

Ngày tải lên: 21/06/2014, 17:20

... throughput 0 10 20 30 40 50 60 70 80 90 Average delay (slots) Analysis Simulation Figure 13: Comparison of packet delay: analysis versus simulation. 6. CONCLUSIONS Inthispaper,weproposeanewMACprotocolfora UWB WPAN system. The basic ... con- cluded that the proposed CC-CDMA protocol is suitable for UWB WPAN system. APPENDIX ALGORITHM FOR CALCULATING THE AVERAGE NUMBER OF WAITING...

Ngày tải lên: 23/06/2014, 00:20

... Journal on Advances in Signal Processing Table 2: Parameters used to calculate the probability of collision in the Channel MAC. Symbol Parameter a Propagation delay a Normalised propagation delay ... Montreal, Canada, May 2004. [11] M. Ashraf, A. Jayasuriya, S. Perreau, and L. Rasmussen, “Channel MAC: a novel medium access control paradigm for wireless ad hoc networks,” in Proceed...

Ngày tải lên: 21/06/2014, 22:20

... more reasons: (1) it a ects the traffic carrying capacity of MANETs; and (2) it a ects the spatial reuse. Due to the dynamic nature of MANETs, to achieve an efficient power control for MAC protocols ... adjusted to an approximately similar value in two ways. One is to adopt an appropriate power level for tr ansmitting DATA/ACK, de- pending on the average distance from the transmitter to a...

Ngày tải lên: 22/06/2014, 22:20

... before proceeding to transmit, then an ( H + P)/R amount of time to for an interface to transmit a packet consisting of H header and trailer bits and P pay- load bits at a data rate R,thenaτ amount ... 2011:131 http://jwcn.eurasipjournals.com/content/2011/1/131 Page 5 of 15 RESEARCH Open Access A QoS guaranteeing MAC layer protocol for the “underdog” traffic Mahasweta Sarkar 1*...

Ngày tải lên: 20/06/2014, 22:20

... now adopted AUC for evaluating predictive ability of classifiers owing to the fact that AUC is a better performance metric than accuracy [31]. In this study, AUC was used as a value to compare the ... as testing data and different nine-tenths of the data as training data. Finally, the average estimate over all runs was reported by running the above regular 10-fold cross-validation for...

Ngày tải lên: 18/06/2014, 15:20

... inter-pore distances and length. Surface modification and structural characterisation of prepared AAO The coating of ultra-thin metal films Au onto AAO (Au-AAO) was performed by metal vapour deposition ... organoleptic intensity scale for measuring oral malodor. J Dental Res 2004, 83:81-85. [10] Jayaraman S, Walia R, Alagirisamy N: Fluorescein mercuric acetate a novel sensor fo...

Ngày tải lên: 20/06/2014, 04:20

... extracted from the BWHHS database and recoded into binary categorical variables. This model derived from the BWHHS data was repli- cated using data from the “usual care” arm of a large Kamaruzzaman ... proposeafrailtymodeldevel- oped from factor analysis (FA), a rob ust analytical tech- nique which uses latent variables as a means of data reduction to represent a wide range of attribu...

Ngày tải lên: 20/06/2014, 15:20

... Math Math Sci 1–9 (2008). Article ID 163580 11. Razani, A, Salahifard, H: Invariant approximation for CAT(0) spaces. Nonlinear Anal. 72, 2421–2425 (2010). doi:10.1016/j. na.2009.10.039 12. Shahzad, ... without uniform convexity. Abstr Appl Anal. 6, 375–386 (2003) 22. Kaewkhao, A: The James constant, the Jordan von Neumann constant, weak orthogonality, and fixed points for multivalued ma...

Ngày tải lên: 20/06/2014, 22:20

... architectures fabricated by cyclic anodization. Small 2009, 5:1392-1397. 24. Ueno M, Shinada K, Yanagisawa T, Mori C, Yokoyama S, Furukawa S, Takehara S, Kawaguchi Y: Clinical oral malodor measurement ... of analytical applications. A comparative study with gas chromatographic analysis will be performed to evaluate more precisely the performance of our Au-AAO sensor for malodour measureme...

Ngày tải lên: 20/06/2014, 23:20