That's the idea behind as signal-to-noise ratio. But if that someone speaks at 90 dB it may seem mre like a shouting match but at least every word will be clearly heard. If that someone speaks at 60 dB you will still not understand everything. If that someone whispers at 30 dB (signal) you will understand nothing. Let's say the refregirator makes a noise of 50 dB. Let's say you are having a conversation with someone in a kitchen that happens to have a loud refregirator. Note that Power parametrs are expressed in dBm, Quality parameters in dB Although signal strength may appear to be adequate, throughput speeds may vary due to dependencies on cellular tower loads.
There is no black/white answer to what constitutes a successful connection.Measured or reported values vary by modem, carrier, and network environment.Both Signal Strength and Signal Quality must be considered for successful cellular data connection.RSRQ - Reference Signal Received Quality (signal quality) ( dB) (LTE only).RSRP - Reference Signal Received Power (signal power) ( dBm) (LTE only).RSCP - Received Signal Code Power (signal power) ( dBm) (3G only).RSSI - Received Signal Strength Indication (signal power) ( dBm) (2G, 3G and LTE).EC/IO - D ownlink carrier-to-interference ratio (signal quality) ( dB) (2G, 3G & LTE).The other values to take in account are described in other related articles: Important note: measurements like Signal Quality SINR do not incorporate all of the relevant factors to describe the quality of the connection. Physical barriers (mountains, buildings, trains, etc.).Signal going through a cellular repeater.There are many different factors that influence signal strength and quality, including but not limited to: On the opposite side, professionals with a good understanding of this ratio are able for example, to correctly assess the RF links, and also to perform more extensive optimizations, obtaining the best possible performance of the system. This article talks about another magnitude, equally important: the SINR (db), which impacts quality of signal.Īlthough this ratio is of fundamental importance to any cellular system, it is not well understood by many professionals. The Signal Strength is a very important and essential measure for any technology (GSM, CDMA, UMTS, LTE, etc.).
This article explains how to interpret and optimize one of them : SINR. ) display some parameters to help optimizing 2G/3G/4G connexions. This article applies to wifi and LTE devices.Īll devices (smartfones, 4G routers.
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