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This page on RxQUAL vs BER describes difference between RxQUAL and BER used in GPRS.

In GPRS standard, RxQUAL stands for Receiver quality and BER stands for Bit Error Rate. RxQUAL parameter ranges between values 0-7 and it corresponds to range of BER values.

These values are calculated on a block basis i.e. four bursts and then averaged. The RxQUAL correponds to this averaged value of BER. This value is applicable to speech and not packet based data transfer.

RXQUAL_0 Less than 0.1 %
RXQUAL_1 0.26% to 0.30%
RXQUAL_2 0.51% to 0.64%
RXQUAL_3 1.0% to 1.3%
RXQUAL_4 1.9% to 2.7%
RXQUAL_5 3.8% to 5.4%
RXQUAL_6 7.6% to 11.0%
RXQUAL_7 Greater than 15.0%

Quality (RXQUAL) measurements

As part of radio environment monitoring mobile station performs following measurements:
•  Received signal level (RXLEV) measurements
•  Quality (RXQUAL) measurements
•  Interference measurements

•  During packet-transfer mode the mobile estimates the quality of the received downlink blocks
•  The RXQUAL is computed from the average BER before channel decoding. The RXQUAL can be used by the network for network-controlled cell reselection, dynamic coding scheme adaptation, and downlink power control.
•  In packet idle mode, no quality measurements are performed.

Useful GSM Tutorial Links

• GSM Tutorial
• GSM Frame Structure
• GSM Burst types
• GSM speech processing
• GSM Channel types-logical,physical
• GSM logical channels and mapping
• GSM Mobile network entry procedure
• GSM Mobile originated call flow
• GSM Mobile terminated call flow
• GSM Downlink PS Call
• GSM Uplink PS call
• GSM VAMOS Basics
• GSM AMR basics
• GSM Modulation types-MSK,GMSK
• GSM Physical Layer
• GSM Protocol Stack
• GSM Mobile Phone Basics
• GSM Radio Frequency Planning
• GSM MS Power Class
• GSM BTS Transceiver Power Class
• GSM Terminology
• GSM versus GPRS

RF and Wireless Terminologies

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