
318
Wireless Ad Hoc and Sensor Networks
when
λ
increases, the primary network will conduct more transmission and reception
activities, which implies the spectrum opportunities for SUs become less. Therefore,
SUs have to wait for longer time to acquire a spectrum opportunity to transmit data,
followed by the increase of broadcast latency of the three algorithms. From Figure
12.6(c), we can also see that the latency increase of H1 and H2 is much faster than
that of MBS. This is because successful broadcast opportunities are fewer than suc-
cessful unicast opportunities. To maximize the transmission efficiency and reduce the
latency, MBS exploits unicast ...