5.3A UE Channel bandwidth for CA
38.521-23GPPNRPart 2: Range 2 StandaloneRadio transmission and receptionRelease 17TSUser Equipment (UE) conformance specification
5.3A.1 General
TBD
5.3A.2 Minimum guardband and transmission bandwidth configuration for CA
For intra-band contiguous carrier aggregation, Aggregated Channel Bandwidth and Guard Bands are defined as follows, see Figure 5.3A.2-1.
Figure 5.3A.2-1: Definition of Aggregated Channel Bandwidth for intra-band carrier aggregation
The aggregated channel bandwidth, BWChannel_CA, is defined as
BWChannel_CA = Fedge,high – Fedge,low (MHz).
The lower bandwidth edge Fedge, low and the upper bandwidth edge Fedge,high of the aggregated channel bandwidth are used as frequency reference points for transmitter and receiver requirements and are defined by
Fedge,low = FC,low – Foffset,low
Fedge,high = FC,high + Foffset,high
The lower and upper frequency offsets depend on the transmission bandwidth configurations of the lowest and highest assigned edge component carrier and are defined as
Foffset,low = (NRB,low*12 + 1)*SCSlow/2 + BWGB (MHz)
Foffset,high = (NRB,high*12 – 1)*SCShigh/2 + BWGB (MHz)
BWGB = max(BWGB,Channel(k))
NRB,low and NRB,high are the transmission bandwidth configurations according to Table 5.3.2-1 for the lowest and highest assigned component carrier, SCSlow and SCShigh are the sub-carrier spacing for the lowest and highest assigned component carrier respectively. SCSlow, SCShigh, NRB,low, NRB,high, and BWGB,Channel(k) use the largest μ value among the subcarrier spacing configurations supported in the operating band for both of the channel bandwidths according to Table 5.3.5-1 and BWGB,Channel(k) is the minimum guard band for carrier k according to Table 5.3.3-1 for the said μ value.
For intra-band non-contiguous carrier aggregation Sub-block Bandwidth and Sub-block edges are defined as follows, see Figure 5.3A.2-2.
Figure 5.3A.2-2: Definition of sub-block bandwidth for intra-band non-contiguous spectrum
The lower sub-block edge of the Sub-block Bandwidth (BWChannel,block) is defined as
Fedge,block, low = FC,block,low – Foffset, low.
The upper sub-block edge of the Sub-block Bandwidth is defined as
Fedge,block,high = FC,block,high + Foffset, high.
The Sub-block Bandwidth, BWChannel,block, is defined as follows:
BWChannel,block = Fedge,block,high – Fedge,block,low (MHz)
The lower and upper frequency offsets Foffset,block,low and Foffset,block,high depend on the transmission bandwidth configurations of the lowest and highest assigned edge component carriers within a sub-block and are defined as
Foffset,block,low = (NRB,low*12 + 1)*SCSlow/2 + BWGB (MHz)
Foffset,block,high = (NRB,high*12 – 1)*SCShigh/2 + BWGB (MHz)
BWGB = max(BWGB,Channel(k))
where NRB,low and NRB,high are the transmission bandwidth configurations according to Table 5.3.2-1 for the lowest and highest assigned component carrier within a sub-block, respectively. SCSlow, SCShigh, NRB,low, NRB,high, and BWGB,Channel(k) use the largest μ value among the subcarrier spacing configurations supported in the operating band for both of the channel bandwidths according to Table 5.3.5-1 and BWGB,Channel(k) is the minimum guard band for carrier k according to Table 5.3.3-1 for the said μ value.SCSlow and SCShigh are the sub-carrier spacing for the lowest and highest assigned component carrier within a sub-block, respectively.
The sub-block gap size between two consecutive sub-blocks Wgap is defined as
Wgap = Fedge,block n+1,low – Fedge,block n,high (MHz)
5.3A.3 RB alignment with different numerologies for CA
TBD
5.3A.4 UE channel bandwidth per operating band for CA
For intra-band contiguous carrier aggregation, a carrier aggregation configuration is a single operating band supporting a carrier aggregation bandwidth class with associated bandwidth combination sets specified in clause 5.5A.1. For each carrier aggregation configuration, requirements are specified for all aggregated channel bandwidths contained in a bandwidth combination set, UE can indicate support of several bandwidth combination sets per carrier aggregation configuration. The requirements are applicable only when Uplink CCs are configured within the frequency range between lower edge of lowest downlink component carrier and upper edge of highest downlink component carrier.
For intra-band non-contiguous downlink carrier aggregation, a carrier aggregation configuration is a single operating band supporting two or more sub-blocks, each supporting a carrier aggregation bandwidth class. The requirements are applicable only when Uplink CCs are configured within the frequency range between lower edge of lowest downlink component carrier and upper edge of highest downlink component carrier.
Frequency separation class specified in Table 5.3A.4-2 indicates the maximum frequency span between lower edge of lowest component carrier and upper edge of highest component carrier that UE can support per band in downlink or uplink respectively in non-contiguous intra-band operation.
The DL-only frequency spectrum is the width of UE frequency spectrum available to network to configure DL CCs only, and it extends on one-side of the bidirectional spectrum in contiguous manner with no frequency gap between the two. Frequency separation class for DL-only spectrum (Fsd) specified in Table 5.3A.4-3 and is declared per band. The frequency separation class for DL-only spectrum (Fsd) can be equal but not larger than the frequency separation (DL Fs). The combined downlink spectrum (DL Fs + Fsd) cannot exceed 2400 MHz. A UE may configure DL-only spectrum only if the combined downlink spectrum (DL Fs + Fsd) exceeds 1400 MHz. When a UE configures DL-only spectrum, it shall not expect a CC to be configured across the boundary between bidirectional spectrum and DL-only spectrum UE can support respectively.
For inter-band carrier aggregation, a carrier aggregation configuration is a combination of operating bands, each supporting a carrier aggregation bandwidth class.
Table 5.3A.4-1: CA bandwidth classes
|
NR CA bandwidth class |
Aggregated channel bandwidth |
Number of contiguous CC |
Fallback group |
|
A |
BWChannel ≤ 400 MHz |
1 |
1,2,3,4 |
|
B |
400 MHz < BWChannel_CA ≤ 800 MHz |
2 |
1 |
|
C |
800 MHz < BWChannel_CA ≤ 1200 MHz |
3 |
|
|
D |
200 MHz < BWChannel_CA ≤ 400 MHz |
2 |
2 |
|
E |
400 MHz < BWChannel_CA ≤ 600 MHz |
3 |
|
|
F |
600 MHz < BWChannel_CA ≤ 800 MHz |
4 |
|
|
G |
100 MHz < BWChannel_CA ≤ 200 MHz |
2 |
3 |
|
H |
200 MHz < BWChannel_CA ≤ 300 MHz |
3 |
|
|
I |
300 MHz < BWChannel_CA ≤ 400 MHz |
4 |
|
|
J |
400 MHz < BWChannel_CA ≤ 500 MHz |
5 |
|
|
K |
500 MHz < BWChannel_CA ≤ 600 MHz |
6 |
|
|
L |
600 MHz < BWChannel_CA ≤ 700 MHz |
7 |
|
|
M |
700 MHz < BWChannel_CA ≤ 800 MHz |
8 |
|
|
O |
100 MHz ≤ BWChannel_CA ≤200 MHz |
2 |
4 |
|
P |
150 MHz ≤ BWChannel_CA ≤300 MHz |
3 |
|
|
Q |
200 MHz ≤ BWChannel_CA ≤ 400 MHz |
4 |
|
|
NOTE 1: Maximum supported component carrier bandwidths for fallback groups 1, 2, 3 and 4 are 400 MHz, 200 MHz, 100 MHz and 100 MHz respectively except for CA bandwidth class A. NOTE 2: It is mandatory for a UE to be able to fall back to lower order CA bandwidth class configuration within a fallback group. It is not mandatory for a UE to be able to fall back to lower order CA bandwidth class configuration that belongs to a different fallback group. |
|||
Table 5.3A.4-2: Frequency separation classes for non-contiguous intra-band operation
|
Frequency separation class |
Max. allowed frequency separation (Fs) |
|
I |
800 MHz |
|
II |
1200 MHz |
|
III |
Fs1400 MHz |
|
IV |
1000 MHz |
|
V |
1600 MHz |
|
VI |
1800 MHz |
|
VII |
2000 MHz |
|
VIII |
2200 MHz |
|
IX |
2400 MHz |
|
X |
400 MHz |
|
XI |
600 MHz |
|
NOTE 1: Fs values larger than 1400 MHz apply only to downlink frequency separation. |
|
Table 5.3A.4-3: Frequency separation classes for DL-only spectrum
|
Frequency separation class |
Max. allowed frequency separation (Fsd) |
|
I |
200 MHz |
|
II |
400 MHz |
|
III |
600 MHz |
|
IV |
800 MHz |
|
V |
1000 MHz |
|
VI |
1200 MHz |