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SitusCall: Location-Based Mobile Communication for Group Calls and Human Augmentation

We introduce SitusCall, a new system that enhances group communication in emergencies quickly. The sytem allows users to communicate face-to-face with location information through a smartphone. To detect a user's position, the system employs GPS and several beacons, and any nearby user can simply select certain other users to initiate communication. Thus, it does not require personal authentication information, such as an email address or a telephone number. Also, SitusCall affords communication with a flexible streaming layout. The system provides several predefined layouts for face-to-face communication from which users can select to communicate with other connected users. Yet our approach is so simple and direct that it is useful for emergency cases. For example, if a person wants to announce evacuation information (e.g., about dangerous places or conditions) to other people nearby, he or she can simply select icons and connect with those people instantly and share information with them. In this paper, we describe SitusCall in terms of its design, implementation, evaluation, and applications.