Performance parameter of hybrid wireless-optical broadband-access network (WOBAN) : a study on the physical layer of optical backhaul and wireless front-end

Abstract

The hybrid wireless-optical broadband-access network (WOBAN) is a promisingbroadband access network. It provides blanket coverage of broadband and flexible connection forwireless end-users. In this paper, the architecture of the WOBAN is proposed and designed basedon both a wavelengths division multiplexing/time division multiplexing passive optical network(WDM/TDM PON) at the optical backhaul and wireless fidelity/worldwide interoperability formicrowave access (WiFi/WiMAX) technologies at the wireless front-end. The power budget of the optical backhaul based on maximum split ratio of 1/32 for each wavelength channel anda fiber length of 23km from the central office (CO) to the access point (AP) is analyzed withbit error rate (BER) of 10 − 9. Most of the existing works, based on performance evaluationare concerned on network layer aspects. We report the performance analysis in terms of BER,eye diagram, error vector magnitude (EVM), and signal-to-noise ratio (SNR) of the WOBANphysical layer. It is demonstrated 2Gb/s for downstream/upstream can be achieved at opticalbackhaul for each wavelength channel, at data rates of 54Mb/s (WiFi) and 30Mb/s (WiMAX)per AP along a 50m and 5km wireless links respectively.