Queuing Analysis of HCCA for Multi-Rate Wireless LANs with Truncated ARQ Protocol |
| |
Authors: | Reza Ghazizadeh Pingzhi Fan |
| |
Affiliation: | (1) Athens Information Technology, 0.8 km Markopoulo Ave, P.O. Box 68, 190 02 Peania, Athens, Greece |
| |
Abstract: | In this paper, a novel queuing analytical framework is introduced to analyze the performance of the HCF controlled channel
access designed as a medium access mechanism in wireless local area networks. The queuing model defines a multi-rate medium
using adaptive modulation and coding which is a key point in wireless networks to increase effective transmission rate. Based
on a MAP (Markovian arrival process)/PH (phase type)/1 queue with vacation and time-limited service, the model considers a
limited node buffer and non-ideal channel with the automatic repeat request protocol. Using a MAP for traffic arrival process
and PH distribution for packet service process, the inclusion of the non-transmission and vacation processes makes our analysis
very general and comprehensive to support various types of practical traffic streams. To formulate the model, the powerful
matrix-geometric method is employed, and the mutual impacts of some parameters in the MAC and the PHY layers are then evaluated
to improve system performance. Finally, optimization of parameter settings to maximize throughput is discussed. |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|