Show/Hide Menu
Hide/Show Apps
anonymousUser
Logout
Türkçe
Türkçe
Search
Search
Login
Login
OpenMETU
OpenMETU
About
About
Açık Bilim Politikası
Açık Bilim Politikası
Frequently Asked Questions
Frequently Asked Questions
Browse
Browse
By Issue Date
By Issue Date
Authors
Authors
Titles
Titles
Subjects
Subjects
Communities & Collections
Communities & Collections
Analytical Modelling and Performability Evaluation of Multi-Channel WLANs with Global Failures
Download
10.15837:ijccc.2015.4.1465.pdf
Date
2015-6-23
Author
Ever, Enver
Kirsal, Yonal
Kirsal-Ever, Yoney
Gemikonakli, Orhan
Metadata
Show full item record
This work is licensed under a
Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License
.
Item Usage Stats
5
views
6
downloads
Wireless local area networks (WLANs) which are based on IEEE 802.11 standard are used widely in existing local area network configurations. IEEE 802.11 offers multiple non-overlapping channels to increase the capacity of the network. There are strong evidences that WLANs are prone to impairments. In order to improve the quality of service (QoS) and to evaluate the performance of WLANs realistically, the availability of the systems should be considered. This paper studies performability evaluation of a multi-channel WLAN using analytical modelling approach. Unlike the existing studies, the failures of the overall system, where a critical function unit fails making all the channels unavailable are considered. A new term is introduced as global failures. It is possible to solve the models considered using matrix geometric method where system parameters and minimal non negative solution R is computed by an iterative method. However spectral expansion method is a well-known alternative where the iterative calculations for solving R is avoided using eigenvalues and eigenvectors. The exact spectral expansion method is employed to obtain performability measures such as mean queue length and blocking probability. Iterative refinements are employed in solution of simultaneous equations.
Subject Keywords
Analytical modelling
,
2-dimensional Markov chain analysis
,
Performbility evaluation
,
Availability
,
Spectral expansion
,
Multi-channel WLANs
URI
https://hdl.handle.net/11511/51137
Journal
International Journal of Computers Communications & Control
DOI
https://doi.org/10.15837/ijccc.2015.4.1465
Collections
Department of Computer Engineering, Article