【摘 要】
:
To study multi-radio multi-channel (MR-MC) Ad Hoc networks based on 802.11, an efficient cross-layer routing protocol with the function of joint channel assignm
【机 构】
:
School of Computer and Information,Engineering Research Center of Safety Critical Industry Measure a
论文部分内容阅读
To study multi-radio multi-channel (MR-MC) Ad Hoc networks based on 802.11, an efficient cross-layer routing protocol with the function of joint channel assignment, called joint channel assignment and cross-layer routing (JCACR), is presented.Firstly, this paper introduces a new concept called channel utilization percentage (CUP), which is for measuring the contention level of different channels in a nodes neighborhood, and deduces its optimal value for determining whether a channel is overloaded or not. Then, a metric parameter named channel selection metdc (CSM) is designed, which actually reflects not only the channel status but also corresponding nodes capacity to seize it. JCACR evaluates channel assignment by CSM, performs a local optimization by assigning each node a channel with the smaller CSM value, and changes the working channel dynamically when the channel is overloaded. Therefore, the network load balancing can be achieved. In addition, simulation shows that, when compared with the protocol of weighted cumulative expected transfer time (WCETT), the new protocol can improve the network throughput and reduce the end-to-end average delay with fewer overheads.
其他文献
Diamond/metal composites with 50 vol.% diamond have been produced by spark plasma sintering(SPS)using pure Ag as a matrix and diamond particles as reinforcement
The cathodic behavior of molten CaCl2,CaCl2-CaO and equimolar CaCl2-NaCl-CaO was studied by cyclic voltammograms and constant potential polarization at temperat
The microstructural evolution of 18Cr18Mn2Mo0.77N high nitrogen austenitic stainless steel in aging treatment was investigated by optical microscopy (OM), scann
Though high accuracy of the thermal contour was obtained while adopting finite element method, it could not meet the real-time requirement. One-dimensional fini
The back-propagation neural(BPN)network was proposed to model the relationship between the parameters of the dieless drawing process and the microstructures of
There is a growing need for both science and practice domains to collaboratively and systematically seek knowledge-based strategies for sustainable development.
This paper investigates the dynamics of a TCP system described by a first order nonlinear delay differential equation. By analyzing the associated characteristi
上完语文课.家良兴冲冲地走到我身边.说:“邓老师,我去排练节目啦!”我奇怪地问:“小婧,你不是和家良一起朗诵吗?怎么不去?”小婧低着头.小声说:“我已经被老师换下来了。”
In order to obtain direct solutions of parallel manipulator without divergence in real time, a modified global Newton-Raphson (MGNR) algorithm was proposed for
A new series of solid solutions Lu_2W_3-xMOxO_12(0.5≤x≤52.5)were successfully synthesized by the solid-state method.Their crystal structure and negative therm