Defense Advanced Research Projects AgencyTagged Content List

Network Technology

Relating to nodes in a connected architecture

Showing 11 results for Networking + Spectrum RSS
I2O explores game-changing technologies in the fields of information science and software to anticipate and create rapid shifts in the complex national security landscape. Conflict can occur in traditional domains such as land, sea, air, and space, and in emerging domains such as cyber and other types of irregular warfare. I2O’s research portfolio is focused on anticipating new modes of warfare in these emerging areas and developing the concepts and tools necessary to provide decisive advantage for the U.S. and its allies.

On March 19-20, 2014, 15 teams from around the United States participated in the final event of the DARPA Spectrum Challenge, a competition designed to encourage development of programmable radios that can deliver high-priority transmissions in congested and contested spectrum environments.

Multinational forces, U.S. government agencies and U.S. troops operating together in forward-deployed locations generally have problems communicating—and not just due to language differences. Technical incompatibility between communications systems can hinder information sharing and timely command and control decisions. DARPA’s Mobile Ad hoc Interoperability Network Gateway (MAINGATE) program is helping overcome this technology barrier. The program is nearing completion and plans to transfer the latest version of the system to Army warfighters still engaged in Afghanistan, but who are now focused more on Force Protection as U.S. forces draw down. The MAINGATE system is providing insights into tactical networking of the future, where systems will need more adaptability and capability.
Reliable wireless communications today requires careful allocation of specific portions of the electromagnetic spectrum to individual radio networks. While pre-allocating spectrum is effective in benign environments, radios remain vulnerable to inadvertent interference from other emitters and intentional jamming by adversaries.
Establishing long-range tactical communications for U.S. troops in remote locations currently requires giant parabolic dishes, tall pole-mounted antennas, large antenna domes, and high-power amplifiers. Besides their significant weight, power, and cost (SWAP-C), these antennas present large visual and radio frequency (RF) signatures, are vulnerable to jamming, and constitute a single point of failure.