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Table 3 Simulation parameters

From: Random access with adaptive packet aggregation in LTE/LTE-A

Parameter Description Value
T RAR Duration that starts at the end of a preamble’s transmission and ends at the time instant when the RAR message can be received 5 ms
T D Time used to decode a RAR message 3 ms
T RARW Random access response window 10 ms
T timer Contention resolution timer 24 ms
T CR Duration which starts at time instant when a UE sends the SR message and ends at the time instant when a UE decodes the contention resolution message 8 ms
T E State holding time if no RAR message is received by UE (T E=T RAR+T RARW). 15 ms
T C State holding time if a preamble is transmitted with collision and it is correctly detected by eNB (T C=T RAR+T D+T timer) 32 ms
T S State holding time if a preamble is corrected received and without collision (T S=T RAR+T D+T CR) 16 ms
W Backoff window size 30
N C Number of preamble 20
M Transmission limit 5
α Required loss rate 0.1