About the 5G New Radio Option
R&S
®
SMW-K144
19User Manual 1178.8013.02 ─ 06
The SSs are allocated on predefined symbols but the allocated resource blocks and
subcarriers are user-defined. The TS 38.213 specifies the number of and the start of
the symbols depending on the used SCS and frequency range, see Figure 3-3. In
3GPP, these different start positions of the SS/PBCH blocks are referred as case A to
case E.
3.8 Carrier Bandwidth Part (BWP)
In 5G NR, the bandwidth used for the communication with a specific user (UE) is typi-
cally smaller than the channel bandwidth. These user-specific bandwidths are man-
aged by the different-sized, so called (carrier) bandwidth parts (BWP). Each of BWP
uses its own numerology and thus can use different SCS, symbol duration and CP
length (see Table 3-2).
Using BWPs with different bandwidths allows flexible resource allocation, for example,
for support of UE with reduced bandwidth capabilities or supporting non-contiguous
spectrum. Bandwidth parts can overlap, in which case UEs share the resource ele-
ments.
Figure 3-4: 5G NR numerology and BWP [1]
A BWP is a contiguous set of physical resource blocks that have the same subcarrier
spacing and thus numerology. UEs can be configured with up to 4 BWPs in DL and UL,
but only one can be active at a time. UEs are not expected to receive and transmit out-
side its active BWP.
Carrier Bandwidth Part (BWP)
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