Effective load for flow-level performance modelling of file transfers in wireless LANs

Today, a wide range of 802.11-based Wireless LANs (WLANs) have become dominant to provide wireless Internet access for file transfers. For engineering purposes, there is a need for very simple, explicit, yet accurate, models that predict the performance of WLANs under anticipated load conditions. In this context, several detailed packet-level models have been proposed, based on fixed-point equations. Despite the fact that these models generally lead to accurate performance predictions, they do not lead to simple explicit expressions for the performance of WLANs. Motivated by this, we propose a new analytic model that captures the highly complex combined dynamics and protocol overhead of the 802.11 MAC, IP, TCP and application-layer into an explicit expression for a single parameter which will be called the effective service time. Based on the effective service time, we define the effective load to describe the flow-level performance of file transfers over WLANs with an M/G/1 Processor...

• Type: Journal
• Year: 2010
• Where: COMCOM
• Authors: Geert Jan Hoekstra, Robert D. van der Mei
• Keywords: COMCOM 2010, Effective Service Time, Explicit Expression, Machine Learning, Model