5.3 UE Channel bandwidth
38.521-23GPPNRPart 2: Range 2 StandaloneRadio transmission and receptionRelease 17TSUser Equipment (UE) conformance specification
5.3.1 General
The UE channel bandwidth supports a single NR RF carrier in the uplink or downlink at the UE. From a BS perspective, different UE channel bandwidths may be supported within the same spectrum for transmitting to and receiving from UEs connected to the BS. Transmission of multiple carriers to the same UE (CA) or multiple carriers to different UEs within the BS channel bandwidth can be supported.
From a UE perspective, the UE is configured with one or more BWP / carriers, each with its own UE channel bandwidth. The UE does not need to be aware of the BS channel bandwidth or how the BS allocates bandwidth to different UEs.
The placement of the UE channel bandwidth for each UE carrier is flexible but can only be completely within the BS channel bandwidth.
The relationship between the channel bandwidth, the guardband and the transmission bandwidth configuration is shown in Figure 5.3.1-1.
Figure 5.3.1-1: Definition of channel bandwidth and transmission bandwidth configuration for one NR channel
5.3.2 Maximum transmission bandwidth configuration
The maximum transmission bandwidth configuration NRB for each UE channel bandwidth and subcarrier spacing is specified in Table 5.3.2-1
Table 5.3.2-1: Maximum transmission bandwidth configuration NRB
|
SCS (kHz) |
50 MHz |
100 MHz |
200 MHz |
400 MHz |
|
NRB |
NRB |
NRB |
NRB |
|
|
60 |
66 |
132 |
264 |
N/A |
|
120 |
32 |
66 |
132 |
264 |
5.3.3 Minimum guardband and transmission bandwidth configuration
The minimum guardband for each UE channel bandwidth and SCS is specified in Table 5.3.3-1.
Table 5.3.3-1: Minimum guardband for each UE channel bandwidth and SCS (kHz)
|
SCS (kHz) |
50 MHz |
100 MHz |
200 MHz |
400 MHz |
|
60 |
1210 |
2450 |
4930 |
N/A |
|
120 |
1900 |
2420 |
4900 |
9860 |
NOTE: The minimum guardbands have been calculated using the following equation: (BWChannel x 1000 (kHz) – NRB x SCS x 12) / 2 – SCS/2, where NRB are from Table 5.3.2-1.
The minimum guardband of receiving BS SCS 240 kHz SS/PBCH block for each UE channel bandwidth is specified in table 5.3.3-2 for FR2.
Table: 5.3.3-2: Minimum guardband (kHz) of SCS 240 kHz SS/PBCH block
|
SCS (kHz) |
100 MHz |
200 MHz |
400 MHz |
|
240 |
3800 |
7720 |
15560 |
NOTE: The minimum guardband in Table 5.3.3-2 is applicable only when the SCS 240 kHz SS/PBCH block is received adjacent to the edge of the UE channel bandwidth within which the SS/PBCH block is located.
Figure 5.3.3-1: Void
The number of RBs configured in any channel bandwidth shall ensure that the minimum guardband specified in this clause is met.
Figure 5.3.3-2: UE PRB utilization
In the case that multiple numerologies are multiplexed in the same symbol due to BS transmission of SSB, the minimum guardband on each side of the carrier is the guardband applied at the configured channel bandwidth for the numerology that is transmitted immediately adjacent to the guardband.
If multiple numerologies are multiplexed in the same symbol and the UE channel bandwidth is >200 MHz, the minimum guardband applied adjacent to 60 kHz SCS shall be the same as the minimum guardband defined for 120 kHz SCS for the same UE channel bandwidth.
Figure 5.3.3-3: Guardband definition when transmitting multiple numerologies
NOTE: Figure 5.3.3-3 is not intended to imply the size of any guard between the two numerologies. Inter-numerology guardband within the carrier is implementation dependent.
5.3.4 RB alignment
For each numerology, its common resource blocks are specified in clause 4.4.4.3 in [9], 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 The UE transmission bandwidth configuration is indicated by the higher layer parameter carrierBandwidth [19] and will fulfil the minimum UE guardband requirement specified in clause 5.3.3.
5.3.5 Channel bandwidth per operating band
The requirements in this specification apply to the combination of channel bandwidths, SCS and operating bands shown in Table 5.3.5-1. The transmission bandwidth configuration in Table 5.3.2-1 shall be supported for each of the specified channel bandwidths. The channel bandwidths are specified for both the Tx and Rx path.
Table 5.3.5-1: Channel bandwidths for each NR band
|
Operating band / SCS / UE channel bandwidth |
|||||
|
Operating band |
SCS kHz |
50 MHz |
100 MHz |
200 MHz |
4002 MHz |
|
n257 |
60 |
Yes |
Yes |
Yes |
N/A |
|
120 |
Yes |
Yes |
Yes |
Yes |
|
|
n258 |
60 |
Yes |
Yes |
Yes |
N/A |
|
120 |
Yes |
Yes |
Yes |
Yes |
|
|
n259 |
60 |
Yes |
Yes |
Yes |
N/A |
|
120 |
Yes |
Yes |
Yes |
Yes |
|
|
n260 |
60 |
Yes |
Yes |
Yes |
N/A |
|
120 |
Yes |
Yes |
Yes |
Yes |
|
|
n261 |
60 |
Yes |
Yes |
Yes |
N/A |
|
120 |
Yes |
Yes |
Yes |
Yes |
|
|
NOTE 1: For test configuration tables from the transmitter and receiver tests in Section 6 and 7 that refer to this table and indicate test SCS to use, if referenced SCS value is not supported by the UE in UL and/or DL, select the closest SCS supported by the UE in both UL and DL. NOTE 2: This UE channel bandwidth is optional in this release of the specification. |
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