Total cost reduction achieved by offering protection in PON architectures
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Total cost reduction achieved by offering protection in PON architectures C. Mas Machuca · J. Chen · L. Wosinska
Published online: 3 July 2013 © Springer Science+Business Media New York 2013
Abstract Offering protection in access networks has been thought to be significantly expensive. This paper proposes a new way to provide protection in TDM and WDM PONs. It is shown that very low extra investment is needed to provide protection in the case when it is foreseen during network planning. It is also studied how the total cost is reduced due to the significant diminution of the OPEX related to the failure management. Keywords Passive optical network (PON) · Protection · Capital expenditures (CAPEX) · Operational expenditures (OPEX)
1 Introduction The high bandwidth required by the new services and the high reliability requested by the users (broadening from business to residential users), are forcing network operators to upgrade their networks [1]. However, due to the high market competition, operators are trying to obtain benefit margins by minimizing the investments on infrastructure in order to be able to keep restricted service prices and high C. Mas Machuca () Institute for Communication Networks, Munich University of Technology (TUM), Arcisstrasse 21, 80290 Munich, Germany e-mail: [email protected] J. Chen · L. Wosinska School of ICT, Royal Institute of Technology (KTH), Kista 16440, Stockholm, Sweden J. Chen e-mail: [email protected] L. Wosinska e-mail: [email protected]
reliability. Hence, in this paper a new cost-efficient way to provide protection in fiber access network is proposed. Unprotected and protected architectures are compared in terms of costs and connection availability, showing the significant increase of connection availability at very low increase of infrastructure expenses. On the other hand, several fiber access network architectures have been developed over the years, e.g., point-to-point (P2P), active optical network (AON) and passive optical network (PON). Because of its passive point-to-multipoint structure, PON is able to offer the relatively low deployment cost, low power consumption and high resource efficiency, and hence it is considered as the most promising solution. Currently, Time-Division Multiplexing (TDM) PON is the dominating fiber access technology. Two major standards for TDM PONs have emerged, Ethernet PON (EPON) [2] and gigabit PON (GPON) [3]. Due to huge potential to increase reach, splitting ratio and bandwidth on a per customer basis, Wavelength Division Multiplexing (WDM) PON [4, 5] have been considered as a strong candidate for next-generation PONs. Therefore, in this work we extend our preliminary work in [6] and consider two types of fiber access networks: • Time-Division Multiplexing Passive Optical Network (TDM PON): This access network utilizes Time Division Multiplexing technique to share the capacity of a single transceiver located at the central office among several users. The remote node consists of a power splitter that broadcasts the downstream signal to all the us
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