7.10 Sending performance in the presence of ambient noise
26.1313GPPRelease 18RequirementsTerminal acoustic characteristics for telephonyTS
7.10.1 General
For sending, in handset mode, the UE shall reduce the ambient noise picked up by the microphone(s) without significantly degrading the quality of the speech signal.
7.10.2 Connections with handset UE
The UE shall comply with the following requirements:
S-MOS-LQOfb
– The average of S-MOS-LQOfb scores across all test conditions shall be ≥ 3.7
– As a performance objective, the average of the S-MOS-LQOfb scores across all test conditions should be ≥ 3.9
N-MOS-LQOfb
– The average of the N-MOS-LQOfb scores across all test conditions shall be ≥ 2.7
– As a performance objective, the average of N-MOS-LQOfb scores across all test conditions should be ≥ 3.3
G-MOS-LQOfb
– No requirement.
Compliance shall be checked by the relevant tests described in 3GPP TS 26.132.
7.10.3 Connections with Handheld hands-free UE
It is recommended that the UE meets the following performance objectives:
S-MOS-LQOfb
– The average of S-MOS-LQOfb scores across all five test conditions should be ≥ 3.4
N-MOS-LQOfb
– The average of N-MOS-LQOfb scores across all test conditions should be ≥ 2.3
G-MOS-LQOfb
– No performance objective.
Compliance shall be checked by the relevant tests described in 3GPP TS 26.132.
7.10.4 Connections with electrical interface UE
The UE shall comply with the following requirements:
S-MOS-LQOn
– The average of S-MOS-LQOn scores across all test conditions shall be ≥ 3.0
– As a performance objective, the average of the S-MOS-LQOn scores across all test conditions should be ≥ 3.5
N-MOS-LQOn
– The average of the N-MOS-LQOn scores across all test conditions shall be ≥ 2.3
– As a performance objective, the average of N-MOS-LQOn scores across all test conditions should be ≥ 3.0
G-MOS-LQOn
– No performance objective.
Compliance shall be checked by the relevant tests described in 3GPP TS 26.132.