| Summary: | Communication protocols based on SMS and e-email are simple and straightforward to implement yet they possess a significant communication overhead and delay. In a large sensor network this would increasingly lead to performance issues and decrease scalability of the overall system, since SMS and e-mail include a significant transmission delay and overhead. Additionally, a communication architecture, where clients communicate directly to the central server requires these to be online all the time, thus decreasing battery time. We replaced the initial SMS and e-mail based communication protocol with a TCP based protocol. Furthermore, we selected a new architecture where sensor groups could communicate to a master node in that group, which in turn communicates to the central server. These changes were implemented in an emulator, since the real sensors could not be reconfigured. We evaluated the improvements and could show that we can reduce the communication overhead and transmission delay as well as that the average battery time for all sensors in a group is increased. === Emulator for complex sensor-based IT system
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