Abstract
We present a study concerning the network planning of 60 GHz gigabit wireless local area networks (WLANs) over existing passive optical network (PON) infrastructures. Two fiber-wireless configurations for gigabit WLAN network formations are investigated: i) the Radio & Fiber (RF and ii) the Radio-over-Fiber (RoF) paradigm that employs several remote access units operating under the medium-transparent MAC (MT-MAC) protocol, hence termed as the MT-MACover- PON approach. Simulation-based throughput and delay results are obtained for both network scenarios, revealing the dependence of the 60 GHz enterprise network performance on several network-planning parameters such as load, traffic shape, number of optical wavelengths in the backhaul, and optical backhaul fiber length, highlighting in each case the prevailing architecture. Based on the respective findings we also study a hybrid multitier architecture, termed the GPON-plus-MT-MAC approach, that fuses the abilities of both the RoF and R&F architectures in order to optimally combine their properties and set a framework for next-generation 60 Ghz fiber-wireless networks.
Highlights
The modern communication patterns of home and enterprise mobile users, such as E-health/Telemedicine[1], High-Definition (HD) real-time multimedia streaming and remote wireless display applications[2] require the exchange of unprecedented amounts of data, resulting in the placement of excessive load strain on the existing wireless infrastructure
We have recently demonstrated a MediumTransparent Medium Access Control (MAC) (MT-MAC) protocol that is capable of negotiating traffic requests directly between the Central Office (CO) and the 60GHz wireless clients, which are distributed among multiple Remote Antenna Units (RAUs) [7]- [9]
According to the presented results, the MT-MAC-over-Passive Optical Networks (PONs) architecture is suitable for high inter-cell traffic but requires high optical availability and operates efficiently only for short fiber lengths
Summary
The modern communication patterns of home and enterprise mobile users, such as E-. health/Telemedicine[1], High-Definition (HD) real-time multimedia streaming and remote wireless display applications[2] require the exchange of unprecedented amounts of data, resulting in the placement of excessive load strain on the existing wireless infrastructure. The MTMAC scheme employs a dynamic wavelength allocation algorithm that assigns optical capacity only to RAUs with active wireless clients and permitting the physical reach extension of the RoF network by allowing the deployment and operation of a greater number of antenna units with fewer optical resources. This way a MT-MAC architecture with N RAUs and l available wavelengths offers N 60GHz wireless channels to the users, l of which can function concurrently, whereas data backhauling is operated in an l -channel WDM PON fashion
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