The emerging global information infrastructure comprises wire-based and wireless networks of vast complexity that will provide internetworking services using Next Generation Internet (NGI) technologies: revolutionary applications, gigabit capacity wireless networking, internetworking satellites, and deeply networked systems. New communication network simulations are needed in C4ISR to demonstrate ensuing advances in global operations and distributed resource management. These include full-scale simulation of networklng, protocols, information distribution, and display (including visualization of the global grid itself). We propose a research and development effort that will lead to integrated demonstrations of full-scale land-, air-, and space-based internets with explicit modeling of network dynamics, links, antennas, protocols, physical (fading wideband) channels, and traffic. Realistic models of information sources and sinks (such as sensor to shooter) together with scenarios and concept-of-operations (CONOPS) will support C2 concept and technology evaluation, device emulation, and drive interfaces for hardware in-the-loop demonstrations. The simulation framework is based on object-oriented software technology and uses a runtime system for dlstributed high performance computing and networking
