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ICRA2013 Decentralized
P2P Network Coordination with an Adaptive Transmission Cycle Decision
Mechanism and a Simplified Pulse-Coupled Oscillator Akiya Kamimura, Kohji Tomita and
Haruhisa Kurokawa IRCOM movies 1. Developed
ten IRCOMs
2. Eight nodes
communication in demo mode Here, 8 nodes are turned on one by one and turned off
one by one. You can hear tick-tack rhythms that represent transmission
timings of nodes. It is confirmed that 8 nodes communicate together by
dividing time slots for transmissions. 3. Four nodes
communication in high-speed mode 4 nodes are communicating without
waits. On the PC screen, it is shown that connected nodes' IDs, received
timings and transmission cycles. 4. Demonstration of 3 nodes
in a line (Hidden node problem) To make a situation that 3 nodes are connected in a
line, we covered one of nodes with a box, one of sides was cut for
communication. On the PC screen, the character "V" indicates the
virtual node seen from the base station node. The movie proves that the
proposed method is applicable to the hidden node problem. movie.files\hidden_node_problem.wmv 5. Communications among 5
nodes connected in a line 5 nodes (No.1, 2, 3, 4, 6) were connected in a line.
No.1 node is a base station node connected to the host PC by USB. No.6 node
is farthest away from the No.1 node. It can be seen that ack
data, shown in "**Ack[from ID][message
No.](dummy): data" format, will be returned hopping through nodes by
typing a target node ID and text data at the terminal window. movie.files\5nodes_in_line.wmv IRCOM Simulator
Real-time simulation with 60 nodes: movie.files\simulation_demo.wmv RFCOM Movies We developed three RFCOMs that just
modified the IRCOM by replacing the LEDs with the RF module. The
communication distance of the RF module reaches up to 1 km in a visible
range. 1. Three RFCOMs
communication It can be seen and heard that three RFCOMs are communicating
with about 2 sec time intervals that is one packet cycle of the RFCOM. 2. Three RFCOMs
Long-Distance Communication In case of long-distance communication with three
RFCOMs, they also can communicate with each other by the proposed method.
Here, the distant node, No. 13, is recognized as a virtual nodes from the
base station node, No. 11. movie.files\LongDistanceCom.wmv Back
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