206 ◾ Mobile Ad Hoc Networks: Current Status and Future Trends
removing transmissions that are unnecessary, due to the wireless broadcast advantage. Sweep can
be applied to all sorts of broadcast trees and not only to BIP broadcast trees. Iterative maximum-
branch minimization [42] starts with a trivial broadcast tree where the source transmits directly to
all other nodes and, at each step, replaces the longest link with a two-hop path that consumes less
energy. In [43], Embedded Wireless Multicast Advantage (EWMA) is proposed that modifies an
MST by checking whether increasing a node’s power, so as to cover a child of one of its children,
would lead to power savings. e r-shrink heuristic [44] is applied to every transmitting node and
shr ...