4 General

37.1043GPPMulti-Standard Radio (MSR) Base Station (BS) radio transmission and receptionNR, E-UTRA, UTRA and GSM/EDGERelease 17TS

4.1 Relation between the MSR specification and the single-RAT specifications

The requirements for MSR are in most parts specified in the present document, while many requirements are also specified through normative references to the respective single-RAT specifications in [2], [3], [4], [5] and [17]. The resulting set of requirements for an MSR BS can be divided into three types, depending on their relation to the single-RAT specifications:

1. Generic MSR requirement: A common generic requirement is specified in the present document that applies for all RATs and for BS configured for both multi-RAT and single-RAT operation. In some cases, there are additional requirement(s) that apply only in some Band Category. There are no references to the single-RAT specifications.

2. Generic MSR requirement, with additional single-RAT requirements: A common generic requirement is specified in the present document which applies as in point 1. In addition, some single RAT requirement(s) apply, included by normative reference(s) to the single-RAT specification(s).

3. Single-RAT only requirements: In this case, no common generic requirement is defined. The existing single-RAT requirement applies for each RAT, included by normative reference(s) to the single-RAT specification(s).

The applicability of each requirement is described in clause 5.

4.2 Relationship between minimum requirements and test requirements

The Minimum Requirements given in this specification make no allowance for measurement uncertainty. The test specification TS 37.141 [10] defines Test Tolerances. These Test Tolerances are individually calculated for each test. The Test Tolerances are used to relax the Minimum Requirements in this specification to create Test Requirements. For some requirements, including regulatory requirements, the test tolerance is set to zero.

For MSR single-RAT requirements, the principle used to define the test requirement remains from the existing specifications.

For both MSR single-RAT and multi-RAT requirements, the measurement results returned by the Test System are compared – without any modification – against the Test Requirements as defined by the shared risk principle. The Shared Risk principle is defined in ITU-R M.1545 [9].

4.3 Base station classes

The requirements in this specification apply to Wide Area Base Stations, Medium Range Base Stations and Local Area Base Stations unless otherwise stated.

Wide Area Base Stations are characterised by requirements derived from Macro Cell scenarios with a BS to UE minimum coupling loss equal to 70 dB. The Wide Area Base Station class has the same requirements as the base station for General Purpose application in Release 9 and 10.

Medium Range Base Stations are characterised by requirements derived from Micro Cell scenarios with a BS to UE minimum coupling loss equals to 53 dB.

Local Area Base Stations are characterised by requirements derived from Pico Cell scenarios with a BS to UE minimum coupling loss equal to 45 dB.

For GSM/EDGE operation of an MSR BS, the requirements according to the applicable multicarrier BTS class apply. The Wide Area BS, Medium Range BS and Local Area BS in the present specification correspond to the Wide Area multicarrier BTS, Medium Range multicarrier BTS and Local Area multicarrier BTS respectively in the GSM/EDGE specifications. MSR requirements for multi-RAT operation only apply for the highest GSM/EDGE static power step.

4.4 Regional requirements

Some requirements in the present document may only apply in certain regions either as optional requirements, or set by local and regional regulation as mandatory requirements. It is normally not stated in the 3GPP specifications under what exact circumstances that the requirements apply, since this is defined by local or regional regulation.

Table 4.4-1 lists all requirements in the present specification that may be applied differently in different regions. There are additional single-RAT regional requirements that may apply. These are referenced from the present specification, but listed in the specification for the RATs concerned [2][3][4][5][17].

Table 4.4-1: List of regional requirements

Clause number

Requirement

Comments

4.5

Operating bands and Band Categories

Some bands may be applied regionally.

6.2.2

Base station output power

These requirements apply in Japan for a BS operating in band 34 and Band 41.

6.6.1.1

Mandatory requirements (spurious emissions)

Category A limits are mandatory for regions where Category A limits for spurious emissions, as defined in ITU-R Recommendation SM.329 [2] apply. Category B limits are mandatory for regions where Category B limits for spurious emissions, as defined in ITU-R Recommendation SM.329 [2] apply.

6.6.1.3

Additional spurious emissions requirements

These requirements may be applied for the protection of system operating in frequency ranges other than the MSR BS operating band.

6.6.1.3

Additional spurious emissions requirements

In addition to the requirements in subclauses 6.6.1.1, 6.6.1.2 and 6.6.1.3, the BS may have to comply with the applicable emission limits established by FCC Title 47 [8], when deployed in regions where those limits are applied, and under the conditions declared by the manufacturer.

6.6.1.4

Co-location (spurious emissions)

These requirements may be applied for the protection of other BS receivers when a BS operating in another frequency band is co-located with an MSR BS.

6.6.2.1

Operating band unwanted emissions

For BS operating in Band 41 in Japan, the operating band unwanted emissions limits shall be applied to the sum of the emission power over all antenna connectors.

6.6.2.4.1

Additional requirement (Operating band unwanted emissions)

In addition to the requirements in subclauses 6.6.2.1 and 6.6.2.2, the BS may have to comply with the applicable emission limits established by FCC Title 47 [8], when deployed in regions where those limits are applied and under the conditions declared by the manufacturer.

6.6.2.4.2

Unsynchronized operation for BC3 (Operating band unwanted emissions)

The requirements for unsynchronized TDD co-existence may apply regionally.

6.6.2.4.3

Protection of DTT (Operating band unwanted emissions)

The requirements for protection of DTT may apply regionally.

6.6.2.4.4

Co-existence with services in adjacent frequency bands (Operating band unwanted emissions)

This regional requirement may be applied for the protection of systems operating in frequency bands adjacent to band 1 as defined in clause 4.5, in geographic areas in which both an adjacent band service and UTRA and/or E‑UTRA are deployed.

6.6.2.4.7

Additional band 32 unwanted emissions

These requirements may apply in certain regions

6.6.3

Occupied bandwidth

The requirement may be applied regionally. There may also be regional requirements to declare the Occupied bandwidth according to the definition.

6.6.5.3

Transmitter spurious emissions

For BS operating in Band 41 in Japan, the spurious emissions limits shall be applied to the sum of the emission power over all antenna connectors

6.7.4

Additional requirements

These requirements may apply in certain regions.

7.5.2

Co-location requirement (blocking)

These requirements may be applied for the protection of the BS receiver when a BS operating in another frequency band is co-located with an MSR BS.

4.5 Operating bands and Band Categories

MSR requirements are applicable for band definitions and band numbering as defined in the specifications TS 45.005 [5], TS25.104 [2], TS 25.105 [3], TS 36.104 [4] and TS 38.104 [17]. For the purpose of defining the BS requirements, the operating bands are divided into three band categories as follows:

– Band Category 1 (BC1): Bands for NR FDD, E-UTRA FDD and/or UTRA FDD operation. Bands in this category are also used for NB-IoT operation (all modes)

– Band Category 2 (BC2): Bands for NR FDD, E-UTRA FDD, UTRA FDD and/or GSM/EDGE operation. Bands in this category are also used for NB-IoT operation (all modes)

– Band Category 3 (BC3): Bands for NR TDD, E-UTRA TDD and/or UTRA TDD operation. Bands in this category are also used for NB-IoT operation (all modes)

NOTE: For UTRA TDD, requirements in the present document cover the 1.28 Mcps UTRA TDD option.

The paired and unpaired bands for the three Band Categories are shown in Table 4.5-1 and 4.5-2, together with the supported RATs and corresponding NR, E-UTRA, UTRA and GSM/EDGE band designations.

Table 4.5-1: Paired bands in NR, E-UTRA, UTRA and GSM/EDGE.

MSR Band number

Supported RATs and Band Numbers

Uplink (UL)
BS receive,
UE transmit

(MHz)

Downlink (DL)
BS transmit,
UE receive

(MHz)

BC

Notes

NR

E-UTRA

NB-IoT

UTRA

GSM/EDGE

1

n1

1

X

I

1920 – 1980

2110 – 2170

1

2

n2

2

X

II

PCS
1900

1850 – 1910

1930 – 1990

2

3

n3

3

X

III

DCS
1800

1710 – 1785

1805 – 1880

2

4

4

X

IV

1710 – 1755

2110 – 2155

1

5

n5

5

X

V

GSM
850

824 – 849

869 – 894

2

6

VI

830 – 840

875 – 885

1

7

n7

7

X

VII

2500 – 2570

2620 – 2690

1

8

n8

8

X

VIII

E-GSM

880 – 915

925 – 960

2

9

9

IX

1749.9 – 1784.9

1844.9 – 1879.9

1

10

10

X

1710 – 1770

2110 – 2170

1

11

11

X

XI

1427.9 – 1447.9

1475.9 – 1495.9

1

12

n12

12

X

XII

699 – 716

729 – 746

1

13

n13

13

X

XIII

777 – 787

746 – 756

1

14

n14

14

X

XIV

788 – 798

758 – 768

1

15

Reserved

16

Reserved

17

17

X

704 – 716

734 – 746

1

18

n18

18

X

815 – 830

860 – 875

1

19

19

X

XIX

830 – 845

875 – 890

1

20

n20

20

X

XX

832 – 862

791 – 821

1

21

21

X

XXI

1447.9 – 1462.9

1495.9 – 1510.9

1

22

22

XXII

3410 – 3490

3510 – 3590

1

23

23

2000 – 2020

2180 – 2200

1

Note 4

24

n24

24

X

1626.5 – 1660.5

1525 – 1559

1

Note 6

25

n25

25

X

XXV

1850 – 1915

1930 – 1995

1

26

n26

26

X

XXVI

814 – 849

859 – 894

1

27

27

807 – 824

852 – 869

1

28

n28

28

X

703 – 748

758 – 803

1

29

n29

29

N/A

717 – 728

1

Note 1

30

n30

30

2305 – 2315

2350 – 2360

1

31

31

X

452.5 – 457.5

462.5 – 467.5

1

32

32

XXXII

N/A

1452 – 1496

1

Note1, Note 2

64

Reserved

65

n65

65

X

1920 – 2010

2110 – 2200

1

66

n66

66

X

1710 – 1780

2110 – 2200

1

Note 7

67

n67

67

N/A

738 – 758

1

Note 1

68

68

698 – 728

753 – 783

1

69

69

N/A

2570 – 2620

1

Note 1

70

n70

70

X

1695 – 1710

1995 – 2020

1

Note 5

71

n71

71

X

663 – 698

617 – 652

1

72

72

X

451 – 456

461 – 466

1

73

73

X

450 – 455

460 – 465

1

74

n74

74

X

1427 – 1470

1475 – 1518

1

75

n75

75

N/A

1432 – 1517

1

Note 1

76

n76

76

N/A

1427 – 1432

1

Note 1

85

n85

85

X

698 – 716

728 – 746

1

87

87

X

410 – 415

420 – 425

1

88

88

X

412 – 417

422 – 427

1

NOTE 1: For NR and/or E-UTRA, the band is restricted to operation when carrier aggregation is configured. The downlink operating band is paired with the uplink operating band (external) of the carrier aggregation configuration that is supporting the configured Pcell.

NOTE 2: For UTRA, the band is restricted to operation when dual band is configured (e.g., DB-DC-HSDPA or dual band 4C-HSDPA). The down link frequenc(ies) of this band are paired with the uplink frequenc(ies) of the other FDD band (external) of the dual band configuration.

NOTE 3: For E-UTRA, the range 2180-2200 MHz of the DL operating band is restricted to operation when carrier aggregation is configured.

NOTE 4: Band 23 is not applicable.

NOTE 5: For E-UTRA, the range 2010-2020 MHz of the DL operating band is restricted to operation when carrier aggregation is configured, and TX-RX separation is 300 MHz. For E-UTRA, the range 2005-2020 MHz of the DL operating band is restricted to operation when carrier aggregation is configured, and TX-RX separation is 295 MHz.

NOTE 6: DL operation is restricted to 1526-1536 MHz frequency range. UL operation is restricted to 1627.5 – 1637.5 MHz and 1646.5 – 1656.5 MHz per FCC Order DA 20-48.

UTRA FDD can operate with DB-DC-HSDPA for the band configurations listed in subclause 5.2 c) of TS 25.104 [2].

NOTE: For BS capable of multi-band operation, the supported operating bands may belong to different Band Categories.

Table 4.5-2: Unpaired bands in NR, E-UTRA and UTRA.

MSR Band number

Supported RATs and Band Numbers

Uplink (UL)
BS receive,
UE transmit

(MHz)

Downlink (DL)
BS transmit,
UE receive

(MHz)

BC

Notes

NR

E-UTRA

NB-IoT

UTRA

33

33

a)

1900 – 1920

1900 – 1920

3

34

n34

34

a)

2010 – 2025

2010 – 2025

3

35

35

b)

1850 – 1910

1850 – 1910

3

36

36

b)

1930 – 1990

1930 – 1990

3

37

37

c)

1910 – 1930

1910 – 1930

3

38

n38

38

d)

2570 – 2620

2570 – 2620

3

39

n39

39

f)

1880 – 1920

1880 – 1920

3

40

n40

40

e)

2300 – 2400

2300 – 2400

3

41

n41

41

X

2496 – 2690

2496 – 2690

3

Note 1

42

42

X

3400 – 3600

3400 – 3600

3

43

43

X

3600 – 3800

3600 – 3800

3

44

44

703 – 803

703 – 803

3

45

45

1447 – 1467

1447 – 1467

3

48

n48

48

X

3550 – 3700

3550 – 3700

3

50

n50

50

1432 – 1517

1432 – 1517

3

51

n51

51

1427 – 1432

1427 – 1432

3

52

52

3300 – 3400

3300 – 3400

3

53

n53

53

2483.5 – 2495

2483.5 – 2495

3

77

n77

3300 – 4200

3300 – 4200

3

78

n78

3300 – 3800

3300 – 3800

3

NOTE 1: Band 41 supports NB-IoT in certain regions.

E-UTRA is designed to operate for the carrier aggregation bands defined in TS 36.101 [18]. The E-UTRA channel bandwidth BWChannel for a single carrier and the Aggregated Channel Bandwidth BWChannel_CA for E-UTRA carrier aggregation are specified in Clause 5.6 of TS 36.104 [4].

The NB-IoT channel bandwidth BWChannel is specified in Clause 5.6 of TS 36.104 [4].

The NR BS channel bandwidth and PRB utilization is specified in Clause 5.3 of TS 38.104 [17].

4.5.1 Band category 1 aspects (BC1)

For each BC1 band, BC1 requirements for receiver and transmitter shall apply with a frequency offset Foffset, RAT from the Lowest and Highest Carriers to the Base Station RF Bandwidth edges and sub-block edges (if any) as defined in Table 4.5.1-1.

Table 4.5.1-1: Foffset, RAT for Band Category 1

RAT

Foffset, RAT

1.4, 3 MHz E-UTRA

BWChannel/2 + 200 kHz

5, 10, 15, 20 MHz E-UTRA and NR

BWChannel/2

UTRA FDD

2.5 MHz

Standalone NB-IoT

200 kHz

4.5.2 Band category 2 aspects (BC2)

For each BC2 band, BC2 requirements for receiver and transmitter shall apply with a frequency offset Foffset, RAT from the Lowest and Highest Carriers to the Base Station RF Bandwidth edges and sub-block edges (if any) as defined in Table 4.5.2-1.

Table 4.5.2-1: Foffset, RAT for Band Category 2

RAT

Foffset, RAT

E-UTRA and NR

BWChannel/2

UTRA FDD

2.5 MHz

GSM/EDGE

200 kHz

Standalone NB-IoT

200 kHz

4.5.3 Band category 3 aspects (BC3)

For each BC3 band, BC3 requirements for receiver and transmitter shall apply with a frequency offset Foffset, RAT from the Lowest and Highest Carriers to the Base Station RF Bandwidth edges and sub-block edges (if any) as defined in Table 4.5.3-1.

Table 4.5.3-1: Foffset, RAT for Band Category 3

RAT

Foffset, RAT

1.4, 3 MHz E-UTRA

BWChannel /2 + 200 kHz

5, 10, 15, 20 MHz E-UTRA and NR

BWChannel /2

1.28 Mcps UTRA TDD

1 MHz

Standalone NB-IoT

200 kHz

4.6 Channel arrangement

4.6.1 Channel spacing

The GSM/EDGE carrier spacing is 200 kHz [5].

The nominal UTRA FDD channel spacing is 5 MHz. The nominal channel spacing is 1.6MHz for the 1.28 Mcps UTRA TDD Option. These can be adjusted to optimise performance in a particular deployment scenario [2,3].

In E-UTRA the spacing between carriers will depend on the deployment scenario, the size of the frequency block available and the channel bandwidths. The nominal channel spacing between two adjacent E-UTRA carriers is defined as following:

Nominal Channel spacing = (BWChannel(1) + BWChannel(2))/2

where BWChannel(1) and BWChannel(2) are the channel bandwidths of the two respective E-UTRA carriers. The channel spacing can be adjusted to optimize performance in a particular deployment scenario [4].

The standalone NB-IoT carrier spacing is 200kHz.

In NR the spacing between carriers will depend on the deployment scenario, the size of the frequency block available and the BS channel bandwidths. The nominal channel spacing between two adjacent NR carriers is defined as following:

– For NR FR1 operating bands with 100 kHz channel raster,

Nominal Channel spacing = (BWChannel(1) + BWChannel(2))/2

– For NR FR1 operating bands with 15 kHz channel raster,

– Nominal Channel spacing = (BWChannel(1) + BWChannel(2))/2 + {-5 kHz, 0 kHz, 5 kHz} for ∆FRaster equals to 15 kHz

– Nominal Channel spacing = (BWChannel(1) + BWChannel(2))/2 + {-10 kHz, 0 kHz, 10 kHz} for ∆FRaster equals to 30 kHz

where BWChannel(1) and BWChannel(2) are the BS channel bandwidths of the two respective NR carriers. The channel spacing can be adjusted depending on the channel raster to optimize performance in a particular deployment scenario [17].

The spacing between E-UTRA and NR carriers will depend on the deployment scenario, the size of the frequency block available and the channel bandwidths. The nominal channel spacing between and E-UTRA carrier and an adjacent NR carrier is defined as following:

– For NR operating bands with 100 kHz channel raster,

Nominal Channel spacing = (BWE-UTRA_Channel + BWNR_Channel)/2

– For NR operating bands with 15 kHz channel raster,

Nominal Channel spacing = (BWE-UTRA_Channel + BWNR_Channel)/2+{-5kHz, 0kHz, 5kHz} for ∆FRaster equals to 15 kHz

Nominal Channel spacing = (BWE-UTRA_Channel + BWNR_Channel)/2+{-10 kHz, 0 kHz, 10 kHz} for ∆FRaster equals to 30 kHz

where BWE-UTRA_Channel and BWNR_Channel are the channel bandwidths of the E-UTRA and NR carriers, ∆FRaster is the band dependent channel raster granularity defined in TS38.101-1[19]. The channel spacing can be adjusted depending on the channel raster to optimize performance in a particular deployment scenario.

.

4.6.1A CA Channel spacing

In E-UTRA for contiguously aggregated carriers the channel spacing between adjacent component carriers shall be multiple of 300 kHz.

The nominal channel spacing between two adjacent aggregated E-UTRA carriers is defined as follows:

where BWChannel(1) and BWChannel(2) are the channel bandwidths of the two respective E-UTRA component carriers according to Table 5.6-1 with values in MHz. The channel spacing for intra-band contiguous carrier aggregation can be adjusted to any multiple of 300 kHz less than the nominal channel spacing to optimize performance in a particular deployment scenario.

In NR for intra-band contiguously aggregated carriers, the channel spacing between adjacent component carriers shall be multiple of least common multiple of channel raster and sub-carrier spacing.

The nominal channel spacing between two adjacent aggregated NR carriers is defined as follows:

For NR operating bands with 100 kHz channel raster:

For NR operating bands with 15 kHz channel raster:

with

where BWChannel(1) and BWChannel(2) are the BS channel bandwidths of the two respective NR component carriers according to Table 5.3.3-1 and 5.3.3-2 in TS 38.104 [17] with values in MHz, μ0 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 Table 5.3.5-2 in TS 38.104 [17] and GBChannel(i) the minimum guard band for channel bandwidth i according to Table 5.3.3-1 and Table 5.3.3-2 in TS 38.104 [17] for the said μ value, with μ as defined in TS 38.211. In case there is no common μ value for both of the channel bandwidths, μ0=1 is selected for NR operating bands with 15 kHz channel raster and GBChannel(i) is the minimum guard band for channel bandwidth i according to Table 5.3.3-1 in TS38.104 [17] for μ=1 with μ as defined in TS 38.211.

In NR the channel spacing for intra-band contiguous carrier aggregation can be adjusted to any multiple of least common multiple of channel raster and sub-carrier spacing less than the nominal channel spacing to optimize performance in a particular deployment scenario.

4.6.2 Channel raster

The GSM/EDGE channel raster is 200 kHz for all bands [5].

The UTRA FDD and TDD channel raster is 200 kHz for all bands, which means that the centre frequency must be an integer multiple of 200 kHz. In addition, a number of additional centre frequencies are specified for UTRA FDD according to [2], which means that the centre frequencies for UTRA FDD channels are shifted 100 kHz relative to the general raster.

The E-UTRA channel raster is 100 kHz for all bands, which means that the carrier centre frequency must be an integer multiple of 100 kHz [4].

NB-IoT channel raster is 100 kHz for all bands [4].

NR channel raster is specified in Clause 5.4.2 of TS 38.104 [17].

4.6.3 Carrier frequencies and numbering

The carrier frequencies and corresponding numbering is defined for each RAT in the respective specifications TS 38.104 [17], 36.104 [4] TS25.104 [2], TS 25.105 [3] and TS 45.005 [5]. In the context of MSR, the frequency numbering scheme for each RAT will remain.

– The E-UTRA carrier frequency numbering (EARFCN) is defined in subclause 5.7 of TS 36.104 [4].

– The UTRA FDD carrier frequency numbering (UARFCN) is defined in subclause 5.4 of TS 25.104 [2].

– The UTRA TDD carrier frequency numbering (UARFCN) is defined in subclause 5.4 of TS 25.105 [3].

– The GSM/EDGE carrier frequency numbering (ARFCN) is defined subclause 2 of TS 45.005 [5].

– The NB-IoT carrier frequency numbering (EARFCN) is defined in subclause 5.7 of TS 36.104 [4].

– The NR carrier frequency numbering (NR-ARFCN) is defined in subclause 5.4.2.3 of TS 38.104 [17].

NOTE: The numbering schemes for UTRA FDD and TDD are not coordinated, while both are called UARFCN.

4.7 Requirements for contiguous and non-contiguous spectrum

A spectrum allocation where an MSR BS operates can either be contiguous or non-contiguous. Unless otherwise stated, the requirements in the present specification apply for BS configured for both contiguous spectrum operation and non-contiguous spectrum operation.

For MSR BS operation in non-contiguous spectrum, some requirements apply both at the Base Station RF Bandwidth edges and inside the sub-block gaps. For each such requirement, it is stated how the limits apply relative to the Base Station RF Bandwidth edges and the sub-block edges respectively.

4.8 Requirements for BS capable of multi-band operation

For BS capable of multi-band operation (for NR this refers to BS type 1-C with a multi-band antenna connector), the RF requirements in clause 6 and 7 apply for each supported operating band unless otherwise stated. For some requirements it is explicitly stated that specific additions or exclusions to the requirement apply for BS capable of multi-band operation. In the case of multiband operation of a BS, single-RAT operation and the corresponding applicability of the requirements for each operating band is determined based on the RAT configuration within only that operating band, unless otherwise stated. A BS may operate multi-RAT where the individual RATs are operated in different RAT specific bands that partially or fully overlap; ΔfOBUE and ΔfOOB are according to the combined frequency range occupied by the overlapping bands.

For BS capable of multi-band operation, various structures in terms of combinations of different transmitter and receiver implementations (multi-band or single band) with mapping of transceivers to one or more antenna port(s) in different ways are possible. In the case where multiple bands are mapped on an antenna connector, the exclusions or provisions for multi-band capable BS are applicable to this antenna connector. In the case where a single band is mapped on an antenna connector, the following applies:

– Single-band transmitter spurious emissions, operating band unwanted emissions, ACLR, transmitter intermodulation and receiver spurious emissions requirements apply to this antenna connector that is mapped to single-band.

– If the BS is configured for single-band operation, single-band requirements shall apply to this antenna connector configured for single-band operation and no exclusions or provisions for multi-band capable BS are applicable. Single-band requirements are tested separately at the antenna connector configured for single-band operation, with all other antenna connectors terminated.

For a band supported by a Base Station where the transmitted carriers are not processed in active RF components together with carriers in any other band, single-band transmitter requirements shall apply. For a band supported by a Base Station where the received carriers are not processed in active RF components together with carriers in any other band, single-band receiver requirements shall apply.

For a BS capable of multi-band operation supporting BC3 bands for TDD, the RF requirements in the present specification assume synchronized operation, where no simultaneous uplink and downlink occur between the bands.

The RF requirements in the present specification are FFS for multi-band operation supporting bands for both FDD and TDD.