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Figure 6. One hop network scenario
different MAC protocols for different levels of
contention within a one-hop neighborhood. Since
Z-MAC has the same test, we can compare its
results to ours.
We fixed the frame size to 20 slots and varied
the number of senders. HCL is disabled because
the performance of HCL and LCL is the same
when all nodes are in a one-hop distance to each
other. Before running H-MAC, the channel al-
location algorithm RBCA and the slot allocation
algorithm SBSA are executed by each node in the
network. In addition, H-MAC runs TPSN (Ganeri-
wal, Kumar and Srivastava, 2003) to synchronize
the clocks of the senders.
The Figure 7 shows simulation results and
the throughput comparison for one-hop scenario
involving H-MAC and Z-MAC. The H-MAC
protocol shows good performance, but with a mar-
Figure 7. Throughput comparison in a one hop scenario
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