Conference Publication Details
Mandatory Fields
Flaithearta, PO,Melvin, H,Schukat, M,
2014 IEEE NETWORK OPERATIONS AND MANAGEMENT SYMPOSIUM (NOMS)
QoS enabled Wifi AP
2014
January
Published
1
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Optional Fields
NTP E-Model QoS RTP VoIP
WiFi-enabled mobile devices such as smartphones and tablets are being increasingly used by both personal and business users for Voice over IP (VoIP) communications, while also supporting conventional data applications such as email, file transfer and web access. Previous research has shown that time synchronized endpoints can provide better QoS by utilizing the Real-time Transport Control Protocol (RTCP) Sender and Receiver Reports (SR/RR) to calculate accurate Mouth to Ear (M2E) delays. The IEEE 802.11e protocol extends 802.11 by providing different traffic priorities based on traffic type. However it cannot distinguish between traffic streams within the same category. In this paper we propose an Access Point (AP)-centred mechanism for further distinguishing between streams within 802.11 categories. It is based on calculating E-Model R-factors for multiple VoIP sessions from delay values that are calculated using RTCP packet information. We detail a real world test-bed and present initial results that correlate well with a previous NS-3 based implementation.
Grant Details
Publication Themes
Informatics, Physical and Computational Sciences