This parameter has an impact on status reporting in AM.
A low frequency of status reporting results in a low frequency of status report scheduling but a high probability that the send window size changes to 0 (means throughput stops until current window retransmission finished), thereby reducing the transmission rate and UE throughput. A high frequency of status reporting results in a high probability of timely acknowledgment to data in the send window and therefore a high probability of rate guarantee. However, a high frequency of status reporting results in a high probability of status report scheduling and repeated transmissions, thereby wasting resources.
t-Reordering timer and Status prohibit timer in RLC should be the same value, otherwise:
- if t-Reordering timer > Status prohibit timer --> some PDUs will be retransmitted from transmitter side since the re-ordering not finished at receiver side.
- if t-Reordering timer < Status prohibit timer --> some PDUs need to be retransmitted from transmitter side but delayed due status prohibit report not delivered in time from receiver side.
hope this help: Mahmoud Ali
