Migration Strategies Toward All Optical Metropolitan Access Rings

Abstract

El acceso a la versión del editor puede requerir la suscripción del recurso Access to the published version may require subscription technology is expected to become mature in the medium term, and it may be used as an alternative to current OCS networks, due to its potential advantages in terms of bandwidth allocation granularity. While OBS is being extensively studied in the literature, little attention has been paid to comparative analysis of OBS versus OCS, specially concerning cost analysis. In this paper, we provide a comparative analysis of OBS versus OCS as an evolutionary technology for all-optical rings in the metropolitan access network. This study is specifically targeted towards optimizing the number of optoelectronic (O/E) receivers and wavelengths, with real traffic matrices from the metropolitan rings in the city of Madrid, Spain. Such matrices also include traffic projections of foreseeable broadband services, based on a market analysis from the largest operator in Spain. Our findings show that OCS might be more efficient than OBS in the metro access segment, which is characterized by a highly centralized traffic pattern. However, the more distributed the traffic is the more efficient OBS is. Consequently, OBS might be better suited to metro-core networks, which show a more distributed and dynamic traffic pattern.

Performance evaluation of an optical transparent access tier based on PON and spectral codes

“…Essentially, the traditional digital subscriber line (DSL) and coaxial cable (COAX) networks were evaluated in terms of up/downstream bandwidth (BW), packet latency and packet loss. The measured link BWs were much lower than future residential BW requirements, which have been estimated in the range from 2/20 Mbps [3] to 30/100 Mbps [4]. Additionally, although measured bandwidths have been observed highly asymmetrical, the authors in [5] have shown that traffic patterns are becoming more and more symmetrical.…”

Failure propagation in GMPLS optical rings: CTMC model and performance analysis

“…Unlike the above-referenced papers, in this work we address the scenario in which failures can propagate, through the GMPLS control plane from one node to its neighbours, and once the control plane functionality is affected, it is possible that the data plane is affected as well thus creating the two-dimensional failure propagation scenario discussed in the introduction. We focus on optical ring networks for two reasons: First, they are widely deployed as part of several transport technologies and are commonly found in metropolitan area networks [15,39]. Second, their structure lend itself amenable to the study of the evolution of failures and the effects on reliability through continuous-time Markov chains, as will be discussed in the following sections.…”

Path correlation considered prioritized burst segmentation for quality of service support in optical burst switching networks

“…For example, to date, the architectures of OBS-based wide area network, 3 metropolitan area network, 4 and access network 5 have been developed and verified by theories.An all-optical four-wavelength 3R burst mode regenerator based on semiconductor optical amplifier-based Mach-Zehnder interferometer has been presented. 1,2 A variety of OBS-based optical networking technologies and architectures have been developed and verified in recent years.…”