Performance evaluation of multihop wireless network : a thesis presented in fulfillment of the requirements for Master of Engineering degree in Electronics and Communications Engineering, School of Engineering and Advanced Technology, Massey University at Albany, New Zealand
In recent years, there has been an upsurge of interest in wireless broadband access networks in both industry and academia. This study aims at evaluating the performance of wireless access networks implemented in the multihop mesh architecture based on IEEE802.11 standards.
An implementation model is defined with the objectives to assess the impact of the variation of several network parameters including the number of mesh access points (MAPs) and stations (STAs), supported profiles, etc. A detailed analysis of the results gathered from 168 simulation runs in OPNET Modeler reveals that the number of MAPs in each extended service set (ESS) could be configured up to 4, the number of STAs associated to each MAP could be up to 8. On the other hand, the EDCA mechanism for QoS support from IEEE802.11e has been considered in the evaluation on both STAs and MAPs. The results show that enabling EDCA mechanism improves the global multihop network performance significantly in the scenarios with more streaming service (more bandwidth demanding) and more real-time applications (more delay stringent and more uplink bandwidth required.