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Tristan Raimondi
CNRI, DIT Rathmines

Dip.Telecom&Net., Dip.ESys., BSc.Eng

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Post-graduate student (MPhil) - Part-time

Title: Quality of Service (QoS) Provisioning in Wireless Local Area Networks

Summary: Since the IEEE 802.11b (or WiFi) standard was approved in 1999, it has gained in popularity to become the world's leading wireless local area network (WLAN) technology. However these WiFi-based networks have a limited capacity owing to the contention-based medium access control (MAC) mechanism specified in the standard. More importantly, the standard does not differentiate between traffic types, which mean that all traffic, irrespective of its importance or priority, experiences the same poor quality of Service (QoS).

An important network application requiring QoS guarantees is the provision of time-bounded services, such as voice over IP (VoIP) and video streaming, where the combination of packet delay, jitter and packet loss will impact on the perceived QoS.

An extension to the WiFi standard currently undergoing revisions by the IEEE for approval sometime in 2004, known as IEEE 802.11e, proposes to make changes to the MAC mechanism, to support LAN applications with QoS requirements.

The objective of this project is to develop a computer simulator that implements the upcoming IEEE 802.11e standard and to use this simulator to evaluate the QoS performance of 802.11e.




  DIT, 1998-2005

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