Emergency Networking in Licensed Spectrum Using Cognitive Radios: Challenges and Insights

A new paradigm for emergency networking is proposed that enables reliable and high data-rate wireless multimedia communications among first responders in licensed spectrum. Such communications are essential for efficient and coordinated rescue and recovery missions in the aftermath of natural and man-made disasters. The envisioned paradigm differs from the traditional dynamic spectrum access paradigm of higher priority for licensed incumbent users compared to unlicensed users because of the need for emergency networks to reverse the role assignments based on dynamic mission policies. As an example, a highly reconfigurable mission-policy-aware cross-layer communication framework for cognitive ad hoc emergency networking is presented. It is followed with a detailed discussion about the research challenges associated with solving optimization problems in resource-constrained environments and in time-constrained emergency scenarios. Research challenges associated with translation and dissemination of the proposed dynamic mission policies and their incorporation into the communication framework are also discussed.

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