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What are the maximum and minimum number of HARQ re-transmissions in LTE standard?

+2 votes

Did LTE specify the min and max numbers for re-transmissions in HARQ? if so then what is it?

posted Jun 10, 2015 by anonymous

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1 Answer

+2 votes

As far as I know, there is no such configuration for maximum number of HARQ retransmissions. The UE will know that it is a retransmission or a new transmission based on NDI which is present in the DCI Format.

However, there is a maximum number of retransmissions at the ARQ level which is configured to the UE. This is applicable to the RLC which is present in the Acknowledged Mode,

maxRetxThreshold ENUMERATED {t1, t2, t3, t4, t6, t8, t16, t32}

answer Jun 15, 2015 by Sudeep Gopal