Dynamic Spectrum Access with Single Transceiver Radios over Cognitive MANET

Intelligent Automation Inc. (IAI) proposes to design, develop and implement a complete dynamic spectrum access (DSA) system operating with single transceiver (ST) radios on a cognitive mobile ad hoc network (MANET). Addressing the single-transceiver requirement along with additional restrictions on channel availability, and other sensing spectrum access capabilities (e.g., due to national policies), the proposed ST-DSA system is empowered by a distributed design (without central controller) where cognitive radios perform collective spectrum management, channel estimation, topology discovery and transmission control (time, space, frequency) to form a self-healing multi-hop cognitive MANET. ST-DSA implements a complete cognitive engine that conducts collective spectrum sensing over licensed and unlicensed spectrum to produce near real-time spectrum map of dynamic topology structures. Radios with ST-DSA capability utilize the spectrum map and apply cross-layer design to joint spectrum access and routing (with backpressure algorithm over multiple frequency bands) to carry tactical data (voice and standard IP data) over the cognitive MANET. The transmission decisions supporting spectral agility include the selection of the next-hop neighbor, the channel (frequency band), power, rate, and traffic flow over the cognitive MANET.