1) Make up the defect coverage. It will have some
"dead zone" in the coverage area of WLAN base station
control center communication system. There are two types
of these dead: a) absolutely without covering, any signal is
not reachable. b) dead area of high-speed service
unreachable, but the synchronous signal, signaling and low
bit rate speech traffic signals can be up to. Since the
introduction of terminal communication organization Ad
hoc can effectively make up for the above two kinds of
coverage defect. It is dead within the terminal 6 in figure 1,
and it cannot be directly communicated with the base station,
but it can be transmitted through the terminal 7. Many the