Ad hoc qs for traffic differentiation
Mowlaei Amir · 2008
The prevalence of wireless network access and the explosion of new multimedia applications running across the network have made it a challenge to provide some form of Quality of Service (QoS) across the wireless network.This is reflected in the activity in the Institute of Electrical and Electronics Engineers (IEEE) to come out with the 802.11e.However, it will take a while before it becomes available for commercial deployment.We have proposed an innovative mechanism called Ad Hoc Qs, which is a MAC-Independent traffic differentiation mechanism for QoS provisioning in an ad hoc wireless network.Ad Hoc Qs enables stations in a shared wireless network to prioritize the transmission across the media, Le. traffic differentiation, using existing 802.11 alb/g.The mechanism resides in the Logical Link layer where packets are scheduled for transmission based on the network traffic in the wireless network channel.Based on the priority of the arriving packets from the Network layer and the time and priority of the last heard packet on the wireless channel, they are sent immediately or delay for a specified time before they are passed to the Medium Access Control (MAC) layer.The scheduler delays the low priority traffics to provide more bandwidth and less delay for the High priority traffic.