Relation between Signal Level, Noise Level and RSSI
s.raghu at samsung.com
Mon Jun 2 08:53:37 EDT 2008
I have following two data, which display Signal Level = -79dBm, Noise Level
= -88dBm and RSSI of 177.
Can any one tell me whats the relation between these three? any
equation..etc. basicaly I want to know how RSSI value is determined as 177?
# iwconfig eth0
eth0 XXXXX ESSID:"xxxx" Nickname:""
Mode:Managed Frequency:2.412 GHz Access Point: 00:1D:7E:0E:3F:54
Bit Rate:54 Mb/s Tx-Power=15 dBm
Retry limit:9 RTS thr=2347 B Fragment thr=2346 B
Link Quality:0/100 Signal level:-79 dBm Noise level:-88 dBm
Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:2350
Tx excessive retries:169 Invalid misc:41836 Missed beacon:0
# cat ./sys/class/net/eth0/wireless/level
Also if any one have idea about
-90 ~ -80dbm: level 1
-79dbm ~ -69dbm: level 2
-69dbm ~ -59dbm: level 3
-59dbm ~ 0: level4.
what these level stands for?
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