Fig. 9
From: Optimizing linear routing in the ToLHnet protocol to improve performance over long RS-485 buses
Performance of the ToLHnet protocol for different node densities. This figure reports the simulated average attainable data rate of the ToLHnet protocol operating at 2 Mbit/s over a 1-km-long cable, as a function of the distance between the source and destination nodes. At this baud rate, direct communication is possible only up to about 60 m, then intermediate hops are needed, causing a drop in throughput. Different curves represent results obtained with different node densities (specified as maximal inter-node distance). It can be seen that the average performance is very little sensitive to node density, except possibly for communication distances just above the direct visibility limit