Shadow phone

Shadow phone for context-aware transmission described in Shih, C. S. and T. K. Trieu, “Shadow Phone: Context Aware Device Replication for Disaster Management,” in Proceedings of International Workshop on Resilient ICT for Management of  Mega  Disasters  (RITMAN  2012).
Traditional disaster warning systems provide general information of disaster events and broadcast to all people. This simple approach adopts one-way communication model in which information is always transferred in a single direction from server-side to client-side. However,  for  better support  of  disaster warning and rescue, the system is  supposed  to leverage informative content by producing user-context de- pendent information. Mobile computing devices are portable and equipped with heterogeneous sensors and are able to provide many types of information collected by these sensors. With the collected information, the disaster management system can instruct the users to get away from the disaster. To achieve this idea, the system requires lots of computing power to customize information to meet demands of large-numbers of users; therefore, cloud computing is the key technology that contributes to the idea implementation. In this work, we propose two important features: (1) context-aware transmission policy which controls how to transmit data efficiently according to data priority, battery level and network data rate and (2) an architecture that supports  the  model of  mobile interactive applications in  which clients and  servers  can interact with each other in an autonomic manner.