Fast handoff with differentiated services based on broadcasting scheduling for VoWLAN Online publication date: Mon, 15-Jun-2015
by Yanling Wu; Ming Li; Xin Ao
International Journal of Sensor Networks (IJSNET), Vol. 18, No. 1/2, 2015
Abstract: Handoff will be occurred if the stations (STAs) move out of the area covered by access points (APs) in wireless local area network (WLAN) during voice over WLAN (VoWLAN) session. The handoff latency in conventional WLAN exceeds to one hundred milliseconds, which is unacceptable for voice over internet protocol (VoIP). This paper proposes a mechanism named fast handoff with differentiated services (FHDS), which can provide prioritised contention-free access through broadcasting scheduling. The impact of Non Real time Service upon VoIP is considered. VoIP packets and NRS packets are randomly generated by STAs. Various probabilities of generating VoIP packets are considered in order to analyse the performance of FHDS. Simulation results show that compared to existing solutions, FHDS can effectively improve the performance of VoWLAN in terms of handoff latency and resource utilisation. And the higher the probability is, the better improvement can be achieved by FHDS.
Existing subscribers:
Go to Inderscience Online Journals to access the Full Text of this article.
If you are not a subscriber and you just want to read the full contents of this article, buy online access here.Complimentary Subscribers, Editors or Members of the Editorial Board of the International Journal of Sensor Networks (IJSNET):
Login with your Inderscience username and password:
Want to subscribe?
A subscription gives you complete access to all articles in the current issue, as well as to all articles in the previous three years (where applicable). See our Orders page to subscribe.
If you still need assistance, please email subs@inderscience.com
Our Blog 
Follow us on Twitter 
Visit us on Facebook