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 |