E.3 Packet delay and loss profiles for simulated stationary operating conditions with DRX 20 ms and DRX 40 ms
26.1323GPPRelease 18Speech and video telephony terminal acoustic test specificationTS
Three delay and loss profiles simulating the packet delay variations and packet loss that a UE may experience in stationary operating conditions with 20ms, 40ms DRX and 40ms DRX with higher BLER, respectively, are generated from the model with the parameter settings as described in Table E.2. The delay profiles are attached as text files and as binary trace files in the form of TCN network emulator.
Table E.2: Parameter settings for packet delay profile generation.
|
Operating condition |
Parameter setting |
System simulator operation |
Delay and Loss profile |
|
Stationary DRX 20 ms |
BLER_tx : 0.1 BLER_rx : 0.1 max_tx : 3 max_rx : 3 drx_cycle_length : 20 mis_eNB1_eNB2 : 10 max_net_delay : 33 min_net_delay : 27 nFrames : 8000 seed : 0 |
Transparent system simulator downlink |
dly_profile_20msDRX_10pct_BLER_e2e |
|
System simulator generating HARQ re-transmissions and DRX operation on the downlink |
dly_profile_20msDRX_10pct_BLER_ue1_to_eNB2 (Not used in 3GPP TS 26.131) |
||
|
Stationary DRX 40 ms |
BLER_tx : 0.1 BLER_rx : 0.1 max_tx : 3 max_rx : 3 drx_cycle_length : 40 mis_eNB1_eNB2 : 30 max_net_delay : 33 min_net_delay : 27 nFrames : 8000 seed : 0 |
Transparent system simulator downlink |
dly_profile_40msDRX_10pct_BLER_e2e |
|
System simulator generating HARQ re-transmissions and DRX operation on the downlink |
dly_profile_40msDRX_10pct_BLER_ue1_to_eNB2 (Not used in 3GPP TS 26.131) |
||
|
Stationary DRX 40 ms (22% BLER) |
BLER_tx : 0.22 BLER_rx : 0.22 max_tx : 3 max_rx : 3 drx_cycle_length : 40 mis_eNB1_eNB2 : 30 max_net_delay : 36 min_net_delay : 24 nFrames : 8000 seed : 0 |
Transparent system simulator downlink |
dly_profile_40msDRX_22pct_BLER_e2e |
Since the model simulates the packet transmission end-to-end, the delay profiles include a packet delay component that according to the definition of the UE delay in 3GPP TS 26.131 [1] is not attributed to the UE delay. This delay shall be included in the test equipment delay when deriving the UE delay from the delay measurments based on the cross-correlation of the injected and measured signals. Values for the compensation attributed to the packet delay profiles are shown in Table E.3.
Table E.3: Packet delay profiles compensation values.
|
Delay and Loss profile |
Compensation value |
|
dly_profile_20msDRX_10pct_BLER_e2e |
30 ms |
|
dly_profile_40msDRX_10pct_BLER_e2e |
30 ms |
|
dly_profile_40msDRX_22pct_BLER_e2e |
30 ms |
Annex F (normative):
Packet delay and loss profiles for jitter buffer management behaviour