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Please explain BLER (IBLER & RBLER) Procedure in LTE?

+3 votes

Cloud any one please explain to me clearly the BLER (IBLER & RBLER) Procedure in LTE?

posted Jul 1, 2015 by Mohamed Qadri

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3 Answers

+1 vote

The Block Error Rate (BLER) is a measure of how successful a data transmission is over the air at the Physical/MAC layer level. If a transport block is successful decoded (the CRC calculated by the receiver matches the CRC sent in the block, then the transmission is successful. The target BLER for the radio link is typically set to 10% (meaning that the transmission must be sent in such a way as to achieve a 90% success rate on average).

If the transmission fails, then the receiver indicates this with a HARQ NAK (negative acknowledgement); the sender can then send additional information (e.g. error correction bits) to help the receiver decode the original transmission (a so-called HARQ retransmission).

iBLER is initial BLER where as rBLER is residual BLER after retransmission.

answer Jul 6, 2015 by Salil Agrawal
Dear Salil,
Thanks for your clear explanation.
but what is the max. Attempts number to stop the RBLER procedure??
i think it should stop after a fixed Numbers of Attempts.
typically two re-transmissions are done by HARQ but this is configurable. If the data can't be decoded after max. HARQ re-transmission attempts, it has to be recovered by RLC ARQ.
Is this range applicable for DL as well as UL as >10%
0 votes

what percentage of area should have IBLER <10%.

answer Jan 16, 2016 by Muhammad Kaleem
Would you like to ask a fresh query, as it is old thread?
0 votes

inital BLER is too much high than Residual BLER?

answer Mar 31, 2020 by Ayaz Khan