Expansion of Optical Access Network to Rural Area

Trends in Next Generation Optical Access Networks and a Proposed Hybrid Optical/Wireless Wide-area Access Network

This paper first reviews trends toward the next-generation optical access networks; one of the key points is how to utilize wavelength-division multiplexing. It also overviews the technique of fiber-wireless access as a candidate to provide wireless connection in the last one step of the future access network. In the latter half, a novel hybrid optical/wireless access network is proposed; the i...

Reliability ver Optical Access Network

Investigation of Qom Rural Area Water Network Accident in 2010 and Minimization Approaches of Accident Frequencies

Background & Aims of the Study: Accidents in water networks can lead to increase the uncounted water, costs of repair, maintenance, restoration and enter water contaminants to water network. The aim of this study is to survey the accidents of Qom rural water network and choose the right approaches to reduce the number of accidents. Materials & Methods:  In this cross...

Network flow models for the local access network expansion problem

In the local access network expansion problem we need to expand a given network (with tree topology) due to traffic demand increase. We can expand the network either by increasing the capacity of its edges and/or by installing equipments that concentrate the traffic of several demand points. This problem has received some attention in the literature. Here, we view the problem as an extension of...

Performance Analysis of Optical Code Division Multiple Access Technique for Metropolitan Area Network

Optical code division multiple access (OCDMA) allows signal to be transmitted in an asynchronous manner, and promises high flexibility and simplicity with considerable security. OCDMA harnesses an enormous bandwidth that provides high spectral utilization and efficiency to support multiple, simultaneous active users. However, this multiple access technique also has impairments such as multiple ...