FUTURE OPTICAL NETWORK ARCHITECTURES
Our research objective is the creation of an optimized, heterogeneous optical network architecture, comprising current and future technology building blocks, that realizes the full potential of optical technology and that will be able to support exponentially increasing future bandwidth demands.
Our approach to developing an optimal optical network architecture will involve a restructuring and optimization of the existing network layer structure by: (i) treating architecture, protocols, and the physical layer as a single entity with strongly interacting, but distinct subsystems, and (ii) employing foreseeable technology as well as suggesting revolutionary hardware technology to exploit the benefits of optics wherever possible. The resulting intelligent optical network will be dynamically reconfigurable, and will enable various new applications by seamlessly optimizing network performance for all types of data traffic. Based on a system-wide optimization, the most efficient switching, routing and transport mechanisms will be developed, which we anticipate will include electronic packet switching as an important overlay atop a much higher-speed network. The enabling architectural concepts in our research are: (i) optical flow switching (OFS) and its implications on physical and higher layer architectures, and (ii) impairment aware routing.
PROACTIVE WIRELESS NETWORKS
The objective of this research is to develop a Proactive Mobile Wireless Network paradigm for next generation infrastructureless wireless networking to guarantee critical services to users with time deadline constraints. In contrast to existing mobile ad hoc wireless networks where frequent network disconnections and greatly degraded services may occur due to fluid changes in the location and composition of wireless devices in combat theatres, a proactive mobile wireless network actively maintains network connections to ensure continuous communication and timely delivery of mission-critical information. Such capabilities will be necessary and crucial for networks that operate under extreme operating scenarios, such as search and rescue.
The proposed Proactive Mobile Wireless Network architecture consists of the following primary components:
In the next phase of this project, we propose to: (1) improve the simulation environment to include physical obstacles and more realistic channel models to further assess the performance of the proposed network architecture; (2) develop distributed algorithms for network topology maintenance.
Figure 1: Simulation of a 50 node proactive mobile wireless network with one helper node whose trajectory is controlled to provide network connectivity support. 
Figure 2: Expected number of helper nodes needed under different helper node deployment scenarios for a line network with randomly located user nodes.