147
Wireless repeaters
In addition to the wireless bridge function,
Nokia access points can act as wireless
repeaters, and extend the range of a system by
receiving and re-transmitting the data at a
mid-point in the communication path:
In the example above, the data from LAN A
which needs to be sent to LAN B is first sent to
the repeater. It is then re-transmitted from the
repeater to LAN B.
Note: Data rate does become degraded, the
more repeaters you use:
degradation of data rate = data rate /
(number of repeaters + 1)
Examples
• For one repeater the data rate is halved.
• For two repeaters, the data rate is divided by
three, and so on.
LAN A
LAN B
repeater
wireless bridge wireless bridge
hub
hub
1%
5%
10%
50%
80%
100%
busy
air tx
air tx
p
o
w
e
r
1
%
5
%
1
0
%
5
0
%
8
0
%
1
0
0
%
b
u
s
y
a
i
r
t
x
a
i
r
t
x
l
a
n
l
i
n
k
l
a
n
b
u
s
y
a
l
e
r
t
1%
5%
10%
50%
80%
100%
busy
air tx
air tx
p
o
w
e
r
1
%
5
%
1
0
%
5
0
%
8
0
%
1
0
0
%
b
u
s
y
a
i
r
t
x
a
i
r
t
x
l
a
n
l
i
n
k
l
a
n
b
u
s
y
a
l
e
r
t
1%
5%
10%
50%
80%
100%
busy
ai
r tx
air tx
p
o
w
e
r
1
%
5
%
1
0
%
5
0
%
8
0
%
1
0
0
%
b
u
s
y
a
i
r
t
x
a
i
r
t
x
l
a
n
l
i
n
k
l
a
n
b
u
s
y
a
l
e
r
t
A032-Adv.book Page 147 Monday, November 13, 2000 10:47 AM