LTE Signaling
R&S
®
CMW-KM5xx/-KS5xx
20
User Manual 1173.9628.02 ─ 16
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The "Uplink Power Control" settings must be appropriate so that the UL signal is
strong enough to be received and decoded by the R&S
CMW.
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The UE capabilities must be in accordance with the security settings in the "Net-
work" section of the configuration dialog.
The attach procedure can fail if authentication or security is disabled but the UE
expects/requires an authentication or security procedure. It can also fail if authenti-
cation or security is enabled but not supported by the UE or the secret key does
not match.
An appropriate USIM can be obtained from Rohde & Schwarz (R&S CMW-Z04,
stock no. 1207.9901.02).
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Some UEs need a DL signal without padding bits for attach. You can disable down-
link padding in the "Connection" section of the configuration dialog.
If the measurement does not start
If the measurement does not start at all while the signaling application generates a
downlink signal, verify that the combined signal path scenario is selected in the mea-
surement.
2.2.3 Carrier Aggregation
Carrier aggregation is an LTE-Advanced Release 10 feature. It aggregates several
component carriers in order to reach a higher bandwidth. Each single component car-
rier is compliant with Release 8.
The R&S
CMW supports the aggregation of two downlink carriers, resulting in a band-
width of up to 40 MHz.
The two carriers can be located in the same operating band using a continuous spec-
trum (intraband contiguous carrier aggregation), or in the same operating band with a
frequency gap between the two carriers (intraband non-contiguous carrier aggregation)
or in different operating bands (interband carrier aggregation).
Most settings can be configured independently for the two carriers, for example the
carrier frequency, bandwidth, downlink power, scheduling type and related channel
settings.
According to 3GPP, a connection setup with carrier aggregation is a two step proce-
dure. In the first step, a Release 8 single carrier connection is set up. The used carrier
is called Primary Component Carrier (PCC). In the second step an additional carrier is
added, called Secondary Component Carrier (SCC).
Access procedures like cell search, cell selection and initial random access are only
performed on the PCC, not on the SCC. The SCC is added, deleted or modified using
an "RRC Connection Reconfiguration" message.
Options required for carrier aggregation:
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R&S CMW-KS502 for FDD carrier aggregation
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R&S CMW-KS552 for TDD carrier aggregation
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R&S CMW-KS512 for advanced carrier aggregation settings
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Two Signaling Unit Wideband (SUW)
General Description
深圳德标仪器
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