Optimising QoS of VoIP over wireless LANs via synchronized time

Author

Flaithearta, Padraig O. ; Melvin, Hugh ; Schukat, Michael

Author_Institution

Discipline of Inf. Technol., Nat. Univ. of Ireland, Galway, Ireland

fYear

2013

fDate

4-7 June 2013

Firstpage

1

Lastpage

3

Abstract

In the existing IEEE 802.11e standard, all VoIP sessions contend within the same prioritization Access Category (AC), despite potentially having very different, and varying one-way (M2E - Mouth to Ear) delays. In this paper we show how VoIP endpoints that are time synchronized can help optimize 802.11e EDCA in order to prioritize VoIP sessions that have relatively large M2E delays and thus distinguish between VoIP sessions. Using the NS-3 Network Simulator, we quantify the benefits achievable through synchronization of an 802.11e network handling multiple VoIP calls in the presence of other TCP traffic.

Keywords

Internet telephony; quality of service; synchronisation; telecommunication traffic; transport protocols; wireless LAN; EDCA; IEEE 802.11e standard; M2E delay; NS-3 network simulator; QoS; TCP traffic; VoIP; access category; one-way delays; synchronized time; wireless LAN; Delays; Downlink; IEEE 802.11e Standard; Multimedia communication; Quality of service; Synchronization; Wireless LAN; E-Model; EDCA; NS-3; QoS; VoIP; Wireless;

fLanguage

English

Publisher

ieee

Conference_Titel

World of Wireless, Mobile and Multimedia Networks (WoWMoM), 2013 IEEE 14th International Symposium and Workshops on a

Conference_Location

Madrid

Print_ISBN

978-1-4673-5827-9

Type

conf

DOI

10.1109/WoWMoM.2013.6583421

Filename

6583421