Wireless Meters on phones and laptops

My Google Foo isn't helping me out today - I'm trying to understand something about how wireless devices such as laptops and phones determine signal strength.

I assume the meter is only telling me it's reception strength, NOT it's capability to talk back to the AP in addition to reception strength.

IE: I may have a high powered AP that's broadcasting hundreds of feet carrying traffic using 802.11x, and maybe my phone says that it's receiving that AP's signal at 100%.  HOWEVER, my phone can't talk back to that AP because the transmitter is not strong enough.

Does this sound about right?
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Azra LyndseyNerdAsked:
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Craig BeckCommented:
That's a fair assumption.

The RSSI is received signal.  If you want to know how strong your signal is back to the AP you need to look at the AP itself to see the RSSI in that direction.
Azra LyndseyNerdAuthor Commented:
OK - so that little meter is strictly RSSI then?
Craig BeckCommented:
Usually, yes.
Sajid Shaik MSystem AdminCommented:
the following are the measurements works in Wireless,

but it's still not complete the signals broadcasts from the access point when it reach to the client it'll pass through so many obstacles ... so what ever the signal (power) strength reach to the client... that's the signal carrying capacity is the speed.

the protocols in the wireless will detect and measure this then give us the out put.

again if you say you have internet 20 Mb connected to your access point that shares it equal to the all connected shares... but the link between access point and client will remains 100 MB it's just connectivity between access point and Client.

internet is the what ever is shared will receive to your part..

hope this what you need...



The signal strength is the wireless signal power level received by the wireless client.
◾Strong signal strength results in more reliable connections and higher speeds.
◾Signal strength is represented in -dBm format (0 to -100). This is the power ratio in decibels (dB) of the measured power referenced to one milliwatt.
◾The closer the value is to 0, the stronger the signal. For example, -41dBm is better signal strength than -61dBm.
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Wireless signal strength is traditionally measured in either percentile or dBm (the power ratio in decibels of the measured power referenced to one milliwatt.) By default, CommView for WiFi displays the signal strength in dBm. The level of 100% is equivalent to the signal level of -35 dBm and higher, e.g. both -25 dBm and -15 dBm will be shown as 100%, because this level of signal is very high. The level of 1% is equivalent to the signal level of -95 dBm. Between -95 dBm and -35 dBm, the percentage scale is linear, i.e. 50% is equivalent to -65 dBm.

If measurements in percentile are preferable, you can switch to percentile by using the Display signal level in dBm option in Settings => Options => Decoding. When Display signal level in dBm is turned on, the signal strength will be shown in dBm on the Nodes, Channels, and Packets tabs. In the packet decoder tree, the level is always shown in both percentile and dBm.

all the best

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