UE channel bandwidthV16.5.0

Toolbox: NRB and minumum guardband calculator
  • Input: frequency range, subcarrier-spacing and bandwidth
  • Output: number of RBs and the guard bandwidth
FRSCS [kHz]BWChannel [MHz]NRBBWGuard [kHz]
270692.5

Toolbox: Band info lookup
  • Input: band, [optional] subcarrier-spacing
  • Output: frequency range, bandwidth, duplexing type, and possible channel bandwidth
BandSCSFRUL band [MHz]DL band [MHz]BW [MHz]DuplexPossible
channel bandwidth
FUL_lowFUL_highFDL_lowFDL_high
119201980211021702 x 60FDD15: [5, 10, 15, 20, 25, 30, 40, 50]
30: [10, 15, 20, 25, 30, 40, 50]
60: [10, 15, 20, 25, 30, 40, 50]

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.

Note:
  • In 4G LTE, there is a one-to-one mapping between base station channel bandwidth and UE channel bandwidth.
  • In 5G NR, the base station channel bandwidth can be greater than or equal to the UE channel bandwidth. E.g., a NR base station could support 100MHz channel bandwidth, while a UE could use only 20MHz bandwidth. Different UE could use different sections of the total base station channel.

The relationship between the channel bandwidth, the guardband and the maximum transmission bandwidth configuration is shown in TS 38.101 Figure 5.3.1-1.

channel bandwidthFigure 5.3.1-1: Channel bandwidth and transmission bandwidth

Frequency range selector

Select the FR range will affect what you see in the remainder of this page.

Possible bandwidth for different frequency ranges
Frequency range designationBandwidth
5 to 100 MHz
50 to 400 MHz
5 to 400 MHz

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.

Note:
  • SCS of 60kHz can be used for both FR1 and FR2
  • SCS of 240kHz is only used for SSB, not for data transmission
  • FR1 may use channel bandwidth of up to 50MHz when using 15kHz subcarrier spacing, and up to 100MHz when using 30 or 60kHz subcarrier spacings. Each band may have its own restrictions the possible channel bandwidth to use.
  • FR2 may use channel bandwidth of up to 200MHz when using 60MHz subcarrier spacing, and up to 400MHz when using 120MHz subcarrier spacing.
Table 5.3.2-1: Maximum transmission bandwidth configuration NRB
FRSCS (kHz)5 MHz10 MHz15 MHz20 MHz25 MHz30 MHz40 MHz50 MHz60 MHz70 MHz80 MHz90 MHz100 MHz200 MHz400 MHz
115255279106133160216270
130112438516578106133162189217245273
160111824313851657993107121135
26066132264
21203266132264
2240000

Minimum guardband and transmission bandwidth configuration

A guard band is an unused part of the radio spectrum between radio bands, for the purpose of preventing interference. 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)
FRSCS (kHz)5 MHz10 MHz15 MHz20 MHz25 MHz30 MHz40 MHz50 MHz60 MHz70 MHz80 MHz90 MHz100 MHz200 MHz400 MHz
115242.5312.5382.5452.5522.5592.5552.5692.5
1305056656458057859459051045825965925885845
16010109901330131012901610157015301490145014101370
260121024504930
21201900242049009860
22403800772015560

The minimum guardbands have been calculated using the following equation (except for FR2 with 240kHz SCS), where is from Table 5.3.2-1, is the channel bandwidth in MHz.

What it means: Guard band equals total channel bandwidth minus transmission bandwidth, then divided by two. There is one SCS component in the equation to count for the unused center subcarrier.

The number of RBs configured in any channel bandwidth shall ensure that the minimum guardband is met.

guardbandFigure 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 received immediately adjacent to the guard.

If multiple numerologies are multiplexed in the same symbol and the UE channel bandwidth is >50 MHz, the minimum guardband applied adjacent to 15 kHz SCS shall be the same as the minimum guardband defined for 30 kHz SCS for the same UE channel bandwidth.

guardband multiple numerologyFigure 5.3.3-3 Guard band definition when transmitting multiple numerologies

UE channel bandwidth per operating band

The requirements 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
FRNR BandSCS (kHz)5 MHz10 MHz15 MHz20 MHz25 MHz30 MHz40 MHz50 MHz60 MHz70 MHz80 MHz90 MHz100 MHz200 MHz400 MHz
1n115510152025304050
3010152025304050
6010152025304050
1n2155101520
30101520
60101520
1n3155101520253040
30101520253040
60101520253040
1n5155101520
30101520
60
1n715510152025304050
3010152025304050
6010152025304050
1n8155101520
30101520
60
1n121551015
301015
60
1n1415510
3010
60
1n181551015
301015
60
1n20155101520
30101520
60
1n25155101520253040
30101520253040
60101520253040
1n26155101520
30101520
60
1n2815510152030
3010152030
60
1n2915510
3010
60
1n3015510
3010
60
1n341551015
301015
601015
1n38155101520253040
30101520253040
60101520253040
1n39155101520253040
30101520253040
60101520253040
1n4015510152025304050
30101520253040506080
60101520253040506080
1n4115101520304050
30101520304050608090100
60101520304050608090100
1n4615102040
301020406080
60
1n471510203040
3010203040
6010203040
1n481551015204050
301015204050608090100
601015204050608090100
1n50155101520304050
301015203040506080
601015203040506080
1n51155
30
60
1n5315510
3010
6010
1n6515510152050
3010152050
6010152050
1n66155101520253040
30101520253040
60101520253040
1n7015510152025
3010152025
6010152025
1n71155101520
30101520
60
1n74155101520
30101520
60101520
1n7515510152025304050
3010152025304050
6010152025304050
1n76155
30
60
1n771510152025304050
301015202530405060708090100
601015202530405060708090100
1n781510152025304050
301015202530405060708090100
601015202530405060708090100
1n79154050
3040506080100
6040506080100
1n801551015202530
301015202530
601015202530
1n81155101520
30101520
60
1n82155101520
30101520
60
1n83155101520
30101520
60
1n84155101520
30101520
60101520
1n8615510152040
3010152040
6010152040
1n89155101520
30101520
60
1n9015101520304050
30101520304050608090100
60101520304050608090100
1n9115510
30
60
1n92155101520
30101520
60
1n9315510
30
60
1n94155101520
30101520
60
1n951551015
301015
601015
1n96152040
3020406080
60
2n2576050100200
12050100200400
2n2586050100200
12050100200400
2n2596050100200
12050100200400
2n2606050100200
12050100200400
2n2616050100200
12050100200400

Asymmetric channel bandwidths

The UE channel bandwidth can be asymmetric in downlink and uplink. In asymmetric channel bandwidth operation, the narrower carrier shall be confined within the frequency range of the wider channel bandwidth.

In FDD, the confinement is defined as a deviation to the default Tx-Rx carrier center frequency separation (defined in Default UE TX-RX frequency separation) as following

The operating bands and supported asymmetric channel bandwidth combinations are defined in table 5.3.6-1 for FDD and table 5.3.6-2 for TDD.

Note: Only FR1 has asymmetric channel bandwidths

Table 5.3.6-1: FDD asymmetric UL and DL channel bandwidth combinations
NR BandChannel bandwidths for UL [MHz]Channel bandwidths for DL [MHz]Combination set
n665, 1020, 400
20400
50, 1020, 25, 30, 401
20, 25, 30401
n70510, 150
5, 10, 1520, 250
n715100
10150
15200
n911050
n92510, 15, 200
1015, 200
n931050
n94510, 15, 200
1015, 200


Table 5.3.6-2: TDD asymmetric UL and DL channel bandwidth combinations
NR BandChannel bandwidths for UL [MHz]Channel bandwidths for DL [MHz]
n506080