Hassan, Wan Hafiza Binti Wan (2015) Effects of enhancing performance in fiber-wireless networks. Other Degree thesis, Victoria University.

Abstract

The convergence of optical and wireless technologies has given rise to the fiber-wireless (Fi-Wi) network. This network combines the huge capacity of optical fiber with the ubiquity and mobility of wireless networks. Fiber to the premises (FTTP) combined with wireless local area network (WLAN) in home distribution is now becoming a reality. However, network congestion in the wireless access link still limits end user performance, especially in dense residential areas. Therefore, this thesis focuses on the enhancement of the wireless media in Fi-Wi networks. The thesis considers the realisation of Fi-Wi networks using the gigabit passive optical network (GPON) and the infrastructure based WLAN. The study shows the binary exponential backoff (BEB) adopted in the medium access control (MAC) pro- tocol for the IEEE 802.11 WLAN standard is the key factor inhibiting WLAN perfor- mance. The standard distributed coordination function (DCF) access method used by WLAN today provides equal chance of transmissions to all stations. This equal- ity can lead to unfairness between uplink (UL) and downlink (DL) transmissions because the number of active wireless users normally exceeds the number of access points. Generally the Fi-Wis access point (AP) requires greater media access than any of its associate wireless users (WUs) because of the predominance of downlink traffic. Thus, techniques to maximize the network throughput and provide fairness between UL and DL transmissions are proposed. Traffic information obtained from monitoring both GPON and WLAN networks is utilized in the proposed schemes.

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