The BS channel bandwidth supports a single NR RF carrier in the uplink or downlink at the Base Station. Different UE channel bandwidths may be supported within the same spectrum for transmitting to and receiving from UEs connected to the BS. The placement of the UE channel bandwidth is flexible but can only be completely within the BS channel bandwidth. The BS shall be able to transmit to and/or receive from one or more UE bandwidth parts that are smaller than or equal to the number of carrier resource blocks on the RF carrier, in any part of the carrier resource blocks.
The relationship between the channel bandwidth, the guardband and the transmission bandwidth configuration is shown in
Figure 5.3.1-1.
The transmission bandwidth configuration N
RB for each BS channel bandwidth and subcarrier spacing is specified in
Table 5.3.2-1 for FR1 and
Table 5.3.2-2 for FR2.
The transmission bandwidth configuration for NB-IoT is specified in
clause 5.6 of TS 36.104.
The minimum guardband for each BS channel bandwidth and SCS is specified in
Table 5.3.3-1 for FR1 and in
Table 5.3.3-2 and
Table 5.3.3-2a for FR2.
The minimum guardband of SCS 240 kHz SS/PBCH block for each BS channel bandwidth is specified in
Table 5.3.3-3 for FR2.
The number of RBs configured in any BS channel bandwidth shall ensure that the minimum guardband specified in this clause is met.
In the case that multiple numerologies are multiplexed in the same symbol, the minimum guardband on each side of the carrier is the guardband applied at the configured BS channel bandwidth for the numerology that is transmitted/received immediately adjacent to the guard band.
For FR1, if multiple numerologies are multiplexed in the same symbol and the BS channel bandwidth is >50 MHz, the guardband applied adjacent to 15 kHz SCS shall be the same as the guardband defined for 30 kHz SCS for the same BS channel bandwidth.
For FR2, if multiple numerologies are multiplexed in the same symbol and the BS channel bandwidth is >200 MHz, the guardband applied adjacent to 60 kHz SCS shall be the same as the guardband defined for 120 kHz SCS for the same BS channel bandwidth.
For each BS channel bandwidth and each numerology, BS transmission bandwidth configuration must fulfil the minimum guardband requirement specified in
clause 5.3.3.
For each numerology, its common resource blocks are specified in
clause 4.4.4.3 of TS 38.211, and the starting point of its transmission bandwidth configuration on the common resource block grid for a given channel bandwidth is indicated by an offset to
"Reference point A" in the unit of the numerology.
For each numerology, all UE transmission bandwidth configurations indicated to UEs served by the BS by higher layer parameter carrierBandwidth defined in
TS 38.331 shall fall within the BS transmission bandwidth configuration.
The requirements in this specification apply to the combination of BS channel bandwidths, SCS and operating bands shown in
Table 5.3.5-1 for FR1 and in
Table 5.3.5-2 and
Table 5.3.5-3 for FR2. The transmission bandwidth configuration in
Table 5.3.2-1,
Table 5.3.2-2 and
Table 5.3.2-3 shall be supported for each of the BS channel bandwidths within the BS capability. The BS channel bandwidths are specified for both the Tx and Rx path.