Assuming a maximum delay of 50 ms means the maximum backhaul propagation time is T SC−CN,max=1.25 ms which, assuming backhaul signals propagate at the speed of light (c=3·108 m.s−1), allows a maximum backhaul length of 375 km.
Channel sensing time is equal to the maximum propagation delay as well and we neglect channel switching penalty for the sake of simplicity.
The length of the time slot can be determined by considering the maximum propagation delay, the transmission delay (i.e., the data rate and the data packet size), and the switching time specified in[7].
The length of a time slot τ is defined to correspond to the maximum propagation delay of resource request and acknowledgement messages.
The average backoff time was assumed to be of 300 μs and the maximum propagation delay between two wireless stations was assumed to be of 1 μs (same assumptions made in [1]).
For the UWB measurement, the propagation space resolution is P sr=3 cm and the maximum propagation distance is L d max=30 m. Figure 9 shows the UWB and the 802.11p normalized PDP vs normalized time samples.
Let denote the propagation time.
BBR, which stands for "Bottleneck Bandwidth and Round-trip propagation time," takes a different approach.
We obtained the maximum propagation length of 2.49 × 103 μm.
The entire process took about 8 hours (excluding the normal propagation time).
