M. Marciniak

Abstract: We present a novel non-conventional approach to the future optical and wireless hybrid transport network that is capable of supporting the dominating kinds of traffic, i.e., voice/real-time, wireless and packet traffic, in a single transport network. The proposed model combines different technologies as connection and connectionless networks, optical cable and wireless (microwave/millimetre wave or optical wireless) and it is suitable for a variety of purposes and services in order to achieve global broadband networking features. Our new networking model contains an extension to the wireless world in order to achieve mobility and personalisation of the connection. It consists of an upgrade of real-time traffic with a microwave modulated optical wave, in order to carry out conventional mobile wireless via optical fibres though long distances and without a significant distortion. The whole available bandwidth can be fully exploited in the hybrid network. In the IP part of the network, quality of service can be differentiated for various classes of packets and network reliability/survivability can be categorised for the whole hybrid network. This substitutes the complete and revolutionary shifting to packet traffic, that many promote, with smooth evolutionary upgrades.

Abstract: We present a novel non-conventional approach to the future optical and wireless hybrid transport network that is capable of supporting the dominating kinds of traffic, i.e., voice/real-time, wireless and packet traffic, in a single transport network. The proposed model combines different technologies as connection and connectionless networks, optical cable and wireless (microwave/millimetre wave or optical wireless) and it is suitable for a variety of purposes and services in order to achieve global broadband networking features. Our new networking model contains an extension to the wireless world in order to achieve mobility and personalisation of the connection. It consists of an upgrade of real-time traffic with a microwave modulated optical wave, in order to carry out conventional mobile wireless via optical fibres though long distances and without a significant distortion. The whole available bandwidth can be fully exploited in the hybrid network. In the IP part of the network, quality of service can be differentiated for various classes of packets and network reliability/survivability can be categorised for the whole hybrid network. This substitutes the complete and revolutionary shifting to packet traffic, that many promote, with smooth evolutionary upgrades.

Abstract: We report experiments on a fully transparent free space optic system operating at 2.5,10 and 40 Gbps. A on-field system operating on a 100 m link as been implemented and tested. Results demonstrate that this kind of system is able to exploit the high bandwidth provided by the fibers and that it can support WDM transmission; in particular it could be a competitive technology in the last mile/last hundred of meters scenario.

Abstract: Free Space Optics (FSO) is a technology able to provide line of sight wireless high-bandwidth digital communication links between remote sites. Therefore it is a key solution for addressing the last hundred meters of broadband requirements. For enhancing the capacity of optical wireless links, DWDM transmission can be used. In this work, 10 Gb/s and 40 Gb/s bit rates have been used in a DWDM fully transparent system. The link has been demonstrated in both in- and outdoor experiments. System performance has been evaluated in terms of BER and Q-factor.

Abstract: A novel approach to the future hybrid communication network capable to support the traffic of different kind, e.g. real time and packet traffic and wireless signal in a single transparent network is proposed. The proposed model combines different technologies as connection and connectionless networking, optical cable and wireless (microwave/ millimeter wave or optical wireless) and it is suitable for a variety of purposes and services in order to achieve global broadband networking.

Abstract: A novel approach to the future hybrid communication network capable to support the traffic of different kind, e.g. real time and packet traffic and wireless signal in a single transparent network is proposed. The proposed model combines different technologies as connection and connectionless networking, optical cable and wireless (microwave/ millimeter wave or optical wireless) and it is suitable for a variety of purposes and services in order to achieve global broadband networking.

Abstract: This paper presents an analytical model that describes the elements involved in the signal generation feasible to be used in radio over fiber systems for the transport of information. In these systems, the radio frequency carriers are conveyed as optical subcarriers over an optical fiber link in a point-to-point or point-to-multipoint connectivity paradigm. The model is based on the definition of both the electrical field and power at the output of the optical modulator for baseband and radiofrequency modulated signals. By modeling the electrical field, it was found a trade-off between the modulation depths of both signals; as well as the their optimum value in order to assure a good signal quality in reception.