An Evaluation of a P2P Sensor Data Streaming System Considering the Number of Hops on the PIAX Testbed

Our research team proposed some peer-to-peer technique based on sensor data streaming methods named LCF, LLF and LLF-H for distributing communication loads when delivering sensor data streams with different data collection cycles. The LCF method and the LLF method mainly focus on the fairness of communication load. However, when many distribution nodes have a same collection cycle, the number of hops to distribute becomes large, and the transmission delay increases by those techniques. To suppress the delay time, we proposed the LLF-H method which add a upper limit to the number of hops on delivering, and evaluated the LLF-H method by the simulation. In this paper, we evaluate the behavior of the transmission delay and the fairness on the LLF-H method with many destination nodes which require same collection cycle, by using the PIAX test bed. From the evaluation result, we confirmed that the transmission delay could be suppressed, without spoiling the fairness of load greatly as compared with the existing LLF method, even if the maximum number of hops was limited to several hops.