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Optical transport networks are at the turning point from providing semi-permanent connections to being engineered to efficiently support dynamic optical connection services. Vital to this transition is the availability of node architectures that improve the flexibility of add/drop port utilization, thereby enabling the transponder connected to a port to be(More)
The growing relevance of wireless communications has been driving the research and development of advanced network architectures to enable the cost-effective support of large numbers of users at very high data rates. In this context, the FUTON project aims to fulfil the objectives of the so-called 4th Generation (4G) through an innovative Distributed(More)
In view of the current prospects in wired and wireless access networks, it is becoming increasingly important to address potential convergence issues between both types of access networks. Therefore, this paper analyzes compatibility aspects of supporting radio signals over a passive optical infrastructure, which must be accounted for to enable the(More)
Future bandwidth-intensive services, which will have a wide impact on our daily lives, from entertainment, to business and health-care, demand high capacity, flexible, resilient and secure underlying networks. Simultaneously, rising energy costs and climate change concerns are increasing the pressure to adopt power-efficient solutions in communication(More)
The growing importance of wireless communications has been driving the research and development of advanced network architectures to enable the cost-effective support of large numbers of users at very high data rates. In this context, the FUTON project aims to fulfil the objectives of the so-called 4th Generation (4G) wireless communications through(More)
The enormous success of Ethernet passive optical network (EPON) deployment has been inciting the development of upgrades for this system, namely the data rate upgrade. In these upgraded next generation access networks, low-cost and simplicity should play a fundamental role, and so the use of low cost multimode laser sources should be considered. However,(More)
The emerging distributed antenna system (DAS) network commonly uses optical fibre as the transmission medium of radio signals sent to/from the remote antenna locations from/to a central unit. As in all access networks, the cost factor is a very critical issue and the maximization of network resource sharing is essential to optimize deployment costs.(More)
The suitability of the radio over fibre technique is assessed for next generation wireless systems employing distributed antennas. A transmission architecture is proposed for supporting multiple wideband radio channels based on subcarrier multiplexing. Three link types are investigated, each using different optical modulation devices. We conclude that the(More)
This paper presents a physical layer performance evaluation of an Ethernet Passive Optical Network (EPON) upgraded to 10 Gbit/s transmission data rate, considering both transmission directions. The performance evaluation is based on an EPON physical layer simulator, which is briefly described. Moreover, the physical impairments that arise with the data rate(More)
ROADM nodes of both legacy and modern DWDM transport networks have fairly small nodal degrees, since in the majority of cases each node has only a fibre pair interconnecting it to a small set of neighbour nodes and only seldom there are two or more fibre pairs involved in the interconnection or the set of neighbour nodes is large (e.g., above 6).(More)