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Sudden Disaster always damages communications infrastructure, adding to the difficulties of rescue efforts. To address this problem, this paper studies the features of post-disaster emergency communication scenario and proposes specific Domain-based Opportunistic Network Model (DONM) which divides an opportunistic network into different domains according to the geographic location and node attributes. Further, Domain-based Message Dispatching Scheme (DMDS) is proposed to resolve efficiently the problem of message dispatching in DONM. DMDS utilizes the frequently moving of active rescue mobile nodes to implement message distribution among domains. Simulation results show that DONM and DMDS can implement posterdisaster emergency communication efficiently and completely. Keywords-emergency communication; DONM; DMDS

DONM: Domain-based Opportunistic Networks Model in Emergency Scenarios