Any other comment from other experts?
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Browse All TopicsI'm new to wimax technology, how to measure wimax performance? What is the accepted value for RSSI & CINR?
Alll comments are welcome
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by: Darr247Posted on 2009-07-30 at 09:31:14ID: 24981554
For performance, I think bits (or Bytes) per second would be a good indication. Maximum speeds (which may vary by carrier, of course) for WiMAX are supposed to be 40Mb (5MB, or 5,000KB) down and 10Mb (1.25MB, or 1,250KB) up, so if you're getting anywhere near those I'd say its performance is excellent. speedtest/ analyzer.p hp s.
e.g. http://www.speedguide.net/
try a few sites at different distances from you. You might also look at the TCP analyzer there to see what it thinks.
http://www.speedguide.net/
Record your baselines for reference, and backup TCP settings for reverting if necessary, before tweaking settings or hardware/connections/cable
RSSI (Received Signal Strength Indication) is expressed in arbitrary units, with more-positive being better (e.g. -90 is better than -99). The available units also depend on the chipset, as some output -100 to +100 and others from -127 to +127. Since they're arbitrary units, there is no ''accepted value'' other than more-positive is 'better'... and zero available signal usually results in the lowest maximum output of the chipset being displayed (-100 or -127).
CINR (Carrier to Interference+Noise Ratio, or 'C/(I+N)') is usually expressed in -dBm and more-negative is logarithmically better.
e.g. -13dBm should be 2x better than -10dBm; -20dBm should be 10x better than -10dBm; -30dBm should be 100x better than -10dBm. But it would work the same way in the positive direction... The larger the number the stronger the signal is over the noise+interference.