A Study of EDCA and DCF in Multihop Ad Hoc Networks
Tommi Larsson, Yusheng Liu, Ali Hamidian · 2008
The IEEE 802.11 based Wireless Local Area Network (WLAN) and ad hoc networks have been widely used and still continuously attract more and more interest. In recent years, along with the development of information technology, the requirements on the size of network, the speed of connection and the complexity of application are growing very quickly. Thus the Quality of Service (QoS) issue is paid much attention by researchers to achieve better performance in WLAN and ad hoc networks. The IEEE 802.11e standard which provides QoS enhancement in the original IEEE 802.11 legacy was released in 2005. In this thesis, the aim is to analyze the QoS performance gain provided by Enhanced Distributed Channel Access (EDCA) of IEEE 802.11e in ad hoc network compared to the original IEEE 802.11 standard, and the impact of changing low priority traffics on high priority traffics. Protocols are implemented in Network Simulator 2 (ns-2) to simulate the network and communication procedures.