Explanation of the influences
Signal strength Signal-to-noise ratio Frequency utilisation
The signal strength is the amp-
litude of the radio wave. The
stronger the signal, the more
clearly the receiver can receive
the transmitted data. The sig-
nal strength decreases with in-
creasing distance or due to un-
favourable transmission me-
dia.
The more sensitive a receiver is
(the better the antennas are),
the less signal strength it
needs.
The signal-to-noise ratio
(SNR) indicates how strong
the noise is compared to the
wanted signal. Radio waves do
not "end". Theoretically the
range is unlimited, practically
only the signal strength de-
creases. This means that radio
waves penetrate other radio
networks and no longer pro-
duce a useful signal, but (dis-
turbing) static noise. If the
noise is too strong (i.e. the sig-
nal-to-noise ratio is very poor),
the receiver can no longer dis-
tinguish the wanted signal
from the noise.
The utilization of the frequency
is the ratio of free transmission
time to occupied transmission
time. A receiver can only re-
ceive one radio signal at a
time. WaveNet devices oper-
ate according to the "listen-
before-talk" principle. No
WaveNet device transmits if it
detects that a radio signal is
already being transmitted on
the frequency band in use. This
results in waiting times until
the frequency band is free
again. The longer these waiting
times are, the longer it takes
for a device to transmit →
The
transmission speed decreases.
WaveNet (Manual)
4. WaveNet system
25 / 210
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