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LTE Signaling
R&S
®
CMW-KM5xx/-KS5xx
83
User Manual 1173.9628.02 ─ 16
2.3.2.5
Possible Extensions
While the connection is established, you can vary "LTE Signaling" settings and "Data
Application Measurements" settings and observe the impact on the measurement
results. You can for example modify the downlink power levels, the downlink channel
configuration and the sent bit rate. You may also set up a MIMO configuration (option
required, see below) and perform LTE end-to-end data tests with MIMO.
The applications can be enhanced for example by the following options:
●
Option R&S CMW-KS510 provides advanced parameter settings for "LTE Signal-
ing"
●
Option R&S CMW-KS520 adds support of MIMO 2x2 in the downlink
●
Option R&S CMW-KS521 adds support of MIMO 4x2 in the downlink
●
Option R&S CMW-KA150 adds support of IPv6
●
Option R&S CMW-KAA20 provides an IMS server
2.3.3 VoLTE Call Setup and Audio Tests
This application sheet describes how to set up a Voice over LTE (VoLTE) call with the
R&S
CMW, using the LTE signaling application and the IMS server of the Data Appli-
cation Unit (DAU).
For the established VoLTE call, basic audio tests are performed with the R&S
CMW
audio board. For speech quality tests with a connected R&S
UPV, the R&S
CMW con-
figuration and the test setup are described.
2.3.3.1
Required Equipment
The following equipment is required to set up a voice over LTE call and to perform
audio tests with the R&S
CMW:
●
Wideband Radio Communication Tester R&S CMW500
●
Hardware options:
–
Signaling unit wideband, R&S CMW-B300x
–
Audio board, R&S CMW-B400B
Speech codec, R&S CMW-B405A
–
Option carrier, R&S CMW-B660A
Ethernet switch, R&S CMW-B661A
Data application unit, R&S CMW-B450x
●
RF cable, for connection of a UE antenna port to an RF COM port
●
Audio cables between the UE microphone / speaker and the AF OUT / IN ports
Alternatives at UE side:
–
UE headset jack or UE microphone/speaker jacks
–
Microphone at UE speaker plus speaker at UE microphone
Use a high quality microphone and speaker designed for that purpose, for
example an artificial head.
●
Software options:
Application Sheets
深圳德标仪器
135-1095-0799