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Block Error Rate (BLER)

Definition - What does Block Error Rate (BLER) mean?

Block error rate (BLER) is a quantitative measure of how well audio is retained in a compact disc (CD) over a period of time. It is used to measure the error rate at the time of extracting data frames from a CD. The BLER is the ratio of total erroneous blocks to that of total number of blocks received in a digital circuit.

Block error rate is also known as block error ratio.

Techopedia explains Block Error Rate (BLER)

According to the European Telecommunications Standards Institute (ETSI), “A Block Error Ratio is defined as the ratio of the number of erroneous blocks received to the total number of blocks sent. An erroneous block is defined as a Transport Block, the cyclic redundancy check (CRC) of which is wrong.”

The most prominent application of BLER is in the industries that use LTE/4G technology such as the telecommunications industry. The main purpose of using the BLER in the telecommunications industry is to determine the in-sync or out-of-sync indication at the time the radio link monitoring (RLM) is done. As an industry standard, 2% is considered a normal in-sync condition, while 10% is considered normal for an out-of-sync condition. Typically, BLER is measured after channel decoding and de-interleaving has been done after performing the cyclic redundancy check (CRC) for all transport blocks.

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