Network Architecture and Performance Analysis of MULTI-OLT PON for FTTH and Wireless Sensor Networks

Abstract

An integrated fiber-to-the-homes (FTTHs) and wirele ss sensor network (WSN) provides a cost-effective solution to build up an immaculate ubiquitous-City (U-city). The key objectives of effective converge nce of FTTH and WSN are less computational complexity f or data packet processing, low installation cost, and good quality of services. In this paper, we int roduce an integrated network structure of multi-opt ical line terminal (multi-OLT) passive optical network ( PON) which can accommodate multiple service providers in a single PON. A modified version of in terleaved polling algorithm is proposed for schedul ing of control messages from multiple OLTs in a single network. We also provide detailed numerical analysi s of cycle time variation, successive grant schedulin g time, and average packet delay for both uniform a nd non-uniform traffic loads generated by each ONU, us ing fixed service bandwidth allocation scheme and limited service bandwidth allocation scheme. We als o compare the throughput of the proposed scheme with existing single-OLT PON for non-uniform traffi c load using limited service bandwidth allocation scheme. The simulation results show that the propos ed multi-OLT PON system can supports existing bandwidth allocation schemes with better performanc e than the single-OLT PON in terms of average packet delay, bandwidth utilization, and throughput .