Morikawa Laboratory


Short Burst with Concurrent Transmission Flooding


To measure acceleration data in structural objects and collect CAN data from mining machinery, it is important to collect data from massive sensor nodes in parallel with high-throughput and low-latency. Toward this, we are developing a multi-hop communication protocol called SB-CTF. This protocol uses concurrent transmission flooding (CTF) as a topology-independent and robust control plane, and uses unicast burst forwarding as a high-speed user plane. For avoiding interference as well as enabling parallel data transmission in multiple forwarding paths, SB-CTF sets up sender nodes and transmission channels by using CTF. Also, for maintaining the efficiency of burst forwarding as well as switching sender nodes with high frequency, SB-CTF reduces guard time with high-accuracy time synchronization. Thus, SB-CTF can perform a high-throughput (more than 10kB/s) and low-latency (a couple of seconds) collection in a network with a hundred of nodes, by switching sender nodes within dozens of milliseconds with no interference. We are implementing several actual applications with SB-CTF including structural health monitoring.