Content for TS 43.050 Word version: 18.0.0
3 Transmission performance
A Considerations on the Acoustic Interface of the Mobile Station
B Test considerations
C Transmission requirements testing
D MS delay requirement definition
E Adaptive gain control
$ Change History
3 Transmission performance p. 12
3.1 Overall Loss/Loudness ratings p. 13
3.1.1 Connections with handset MSs p. 13
3.1.2 Connections with handsfree MSs p. 13
3.1.3 Connections with headset MSs p. 13
3.2 Stability Loss p. 14
3.3 Delay p. 14
3.3.1 General p. 14
3.3.2 Sources of delay p. 14
3.3.2.1 Elements of the PLMN that cause delay p. 14
3.3.2.2 Elements of the PSTN that cause delay p. 14
3.3.3 Effects of delay p. 14
3.3.4 Allocation of delay to the PLMN p. 15
3.3.4.1 Allocation of delay to the PLMN when using a full rate system p. 15
3.3.4.2 Allocation of delay to the PLMN when using a half rate system p. 15
3.3.5 Delay of various network configurations p. 15
3.3.5.1 National and international connections with no echo control in the PSTN (reference configurations A) p. 15
3.3.5.2 National and international connections with echo control in the PSTN (reference configurations B) p. 15
3.3.5.3 Connections where re routeing leads to a significant increase in transmission path length (reference configurations C) p. 16
3.3.6 Delay related requirements on the MS p. 16
3.4 Echo p. 16
3.4.1 General p. 16
3.4.2 Electrical echo control in the PLMN (Reference configurations A) p. 17
3.4.3 Acoustic echo control in the PLMN p. 17
3.4.4 Interaction between tandem echo control devices (reference configurations B & C) p. 17
3.5 Clipping p. 17
3.5.1 General p. 17
3.5.2 Properties of voice switches in the PLMN p. 18
3.5.3 Problems of tandem voice switching p. 18
3.6 Idle channel noise (handset and headset MS) p. 18
3.6.1 Sending p. 18
3.6.2 Receiving p. 18
3.7 Noise contrast p. 18
3.7.1 General p. 18
3.7.2 Elements of a PLMN which can cause noise contrast impairment p. 19
3.7.3 Reduction of noise contrast p. 19
3.7.3.1 Reduction of noise contrast by limiting the noise received by the microphone p. 19
3.7.3.2 Reduction of noise contrast by insertion of comfort noise p. 20
3.7.4 Consequence of the introduction of high comfort noise levels on other voice operated devices p. 20
3.8 Sensitivity/frequency characteristics p. 20
3.8.1 Headset and Handset MSs p. 20
3.8.1.1 Sending p. 20
3.8.1.2 Receiving p. 20
3.8.2 Handsfree MS p. 21
3.8.2.1 Sending p. 21
3.8.2.2 Receiving p. 21
3.9 Distortion (handset and headset MS) p. 21
3.10 Sidetone (handset and headset MS) p. 22
3.11 Not used p. 22
3.12 Requirements for information tones p. 22
3.13 Crosstalk p. 23
3.14 MS Ambient Noise Rejection p. 23
A Considerations on the Acoustic Interface of the Mobile Station p. 32
B (Normative) Test considerations p. 33
C (Normative) Transmission requirements testing p. 34
C.1 Not usedC.2 Not usedC.3 Not usedC.4 Not usedC.5 Variation of gain with input level p. 34
C.5.1 Sending p. 34
C.5.2 Receiving p. 34
C.6 Not used p. 34
C.7 Not used p. 34
C.8 Not used p. 34
C.9 Not used p. 34
C.10 Delay for handsfree MS p. 34
D (Normative) MS delay requirement definition p. 36
D.1 Full rate MS delay requirement definition p. 36
D.2 Half rate MS delay requirement definition p. 37
E Adaptive gain control p. 38
$ Change History p. 39
