| Popis: |
Disaster Prevention and Mitigation (DPM) is aimed to help people to prevent and reduce property damage in time. In this paper, we propose a DPM system called Gaia, which collects sensed data, and sends them to a back-end DPM Server with improved performance. Gaia is equipped with double 3G interfaces and Load Balancing mechanisms with Round Robin scheduling to ensure stable transmission. Furthermore Session Traversal Utilities for NAT (STUN), is applied so that the DPM Server can proactively send requests to Gaia to adjust sensing parameters immediately. With these improvements and advanced features, data transmission speed becomes 50% faster than the previous system, and the cost is reduced 82% in total. |
