R&S CMW-KM5 Series User Manual page 29

®
R&S CMW-KM5xx/-KS5xx
The R&S CMW performs an RRC connection reconfiguration.
This mechanism is only relevant for a handover within the signaling application. It
supports changing the operating band and the channel, but not the cell bandwidth.
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Redirection:
The R&S CMW performs an RRC connection release with redirection information.
This mechanism is relevant for a handover within the signaling application as well
as for a handover to another signaling application or another instrument.
For a handover within the signaling application, it is possible to change the operat-
ing band, the channel and the cell bandwidth. A new connection with the changed
parameters is established.
A handover to another signaling application or instrument results in a new registra-
tion of the UE at the handover destination. No new connection is set up.
●
Mobile terminating circuit switched fallback:
The R&S CMW informs the UE via a CS service notification about an incoming
mobile terminating call. The UE answers with an extended service request with Cir-
cuit Switched Fallback (CSFB) response. Then the R&S CMW performs an RRC
connection release with redirection information. The UE sends a paging response
to the handover destination and a new CS connection is established by the target
signaling application.
This mechanism is only supported for handover to another signaling application.
Supported technologies are for example GSM and WCDMA. The target signaling
application can be located at the same instrument or at another R&S CMW.
Option R&S CMW-KS510 is required.
For a handover to another instrument, there is no communication at all between the
two instruments and no cabling between the two instruments is required. The UE must
be connected to both instruments, e.g. via an external combiner.
To perform a handover, proceed as follows:
1. For a handover within the signaling application, select the handover mechanism to
be used, see
2. For a handover to another signaling application, ensure that the two signaling
applications use different RX/TX modules ("Converter" setting).
3. In the LTE signaling application, establish a connection to the UE.
4. Press the hotkey "Inter/Intra-RAT". A configuration dialog box opens.
5. Configure the settings in the dialog:
a) Select the handover target - either the LTE signaling application or another sig-
b) For a handover to another signaling application, select the "Mobility Mode"
c) Configure the destination parameters. For a handover to an external instrument
User Manual 1173.9628.02 ─ 16
"Operating Band Change, Frequency Change"
naling application or "No Connection" for an external instrument.
(handover mechanism to be used).
the parameters must reflect the actual configuration of the external instrument.
LTE Signaling
General Description
on page 174.
29