In this paper we propose a new concept of future service-aware transport networks that are built on converged wireless-wired
transport networks, enable service layer convergence, and also support application layer convergence. This concept is derived from the emerging trend of business convergence among the telecommunication, cable, and entertainment segments, and technology convergence among the telecommunications, computer, and software industries. We also identify QoS as a technical backbone to future service-aware transport networks, and from the perspective of an
integrated carrier having both wireless and wired assets, discuss related research opportunities and challenges, especially
those involved in optical networks. We finally present an adaptive apparatus for high availability, capacity efficiency, and QoS-guaranteed protection and restoration for optical networks. This paper is intended to promote academic and industrial attention to some core technical challenges that lie ahead for the telecommunication industry and to spur strategically important research and perhaps also some standards activities.
While many system vendors are concerned about losing a generation of well-developed product because of the prolonged slow market, many optical component and subsystem vendors continue to pursue various avenues towards dramatic reduction of total cost of ownership for next generation optical transmission equipment. This paper is intended to provide a carrier's perspective on the potential disruptive impact of the optical integration based new devices to next
generation optical transmission equipment. The emphasis is put on emerging applications of these new devices and related technical requirements. By providing the carriers' perspective, this paper may help promote a new line of thinking about what new technologies vendors should focus on in order to make next-generation optical transmission systems much lower in cost, smaller in footprint, and lower in power consumption.
In a wavelength-routed WDM optical network, having regeneration and wavelength conversion at every node is not cost-effective. However, in a nation-wide backbone network, regeneration is required for some lightpaths. With shared-mesh protection, wavelength-conversion is helpful in increasing the wavelength sharing among protection paths therefore can improve resource-utilization. In this work we study the problem of selecting wavelength-conversion and regeneration sites in such a network. We show that the wavelength converter placement problem can be formulated as an integer linear program and propose several heuristics for solving the sparse wavelength conversion and regeneration problem.
The paper examines, from a carrier's perspective, the viability of free-space optical (FSO) technology as a cost-effective access alternative to fixed point-to-point applications. These include extension of metropolitan area edge networks, network backhaul, temporary deployment while awaiting fiber, disaster recovery, and low cost fiber protection circuits. The paper provides a detailed prognosis of the FSO and its complementing 60GHz RF technology, besides analyses of the total cost of ownership. This leads to some suggestions on how to improve the technical and economical viability of the technology for carriers' applications.
Conference Committee Involvement (2)
Network Architectures, Management, and Applications III
7 November 2005 | Shanghai, China
Network Architectures, Management, and Applications II