User equipment, PDSCH A/N transmitting method thereof, transmission/reception point, and PDSCH A/N receiving method thereof

1. A method for transmitting acknowledgement/negative acknowledgement (A/N) by a user equipment configured with at least two serving cells comprising a primary cell (PCell) and a secondary cell (SCell), having different Time Division Duplex (TDD) Uplink-Downlink (UL-DL) configurations, the method comprising:

receiving a physical downlink shared channel (PDSCH) transmission on the SCell in a subframe ‘n-ki’, the n, k and i being integers;

determining an interval ‘ki’ between the reception of the PDSCH transmission and a responsive A/N transmission, the interval being determined based on a reference UL-DL configuration for the SCell; and

transmitting the A/N responsive to the PDSCH transmission in a subframe ‘n’ according to the interval,

wherein the PCell UL-DL configuration and the SCell UL-DL configuration are selected from among UL-DL configuration defined in Table 1-1 below:

TABLE 1-1

The PCell UL-DL configuration and the

SCell UL-DL configuration

Downlink-

to-Uplink

Uplink-

Switch

Downlink

point

Subframe number

configuration

periodicity

0

1

2

3

4

5

6

7

8

9

0

 5 ms

D

S

U

U

U

D

S

U

U

U

1

 5 ms

D

S

U

U

D

D

S

U

U

D

2

 5 ms

D

S

U

D

D

D

S

U

D

D

3

10 ms

D

S

U

U

U

D

D

D

D

D

4

10 ms

D

S

U

U

D

D

D

D

D

D

5

10 ms

D

S

U

D

D

D

D

D

D

D

6

 5 ms

D

S

U

U

U

D

S

U

U

D

where D denotes a downlink subframe, S denotes a special subframe, and U denotes an uplink subframe,

wherein the reference UL-DL configuration for the SCell is determined based on a PCell UL-DL configuration and SCell UL-DL configuration pair in Table 1-2 below:

TABLE 1-2

Reference UL-DL configuration for SCell

Reference

(PCell UL-DL config-

(PCell UL-DL config-

UL-DL con-

uration, SCell UL-DL

uration, SCell UL-DL

figuration

configuration)

configuration)

1

(1, 0), (1, 6)

(0, 1), (6, 1)

2

(2, 0), (2, 1), (2, 6)

(0, 2), (1, 2), (6, 2)

3

(3, 0), (3, 6)

(0, 3), (6, 3)

4

(4, 0), (4, 1), (4, 3), (4, 6)

(0, 4), (1, 4), (3, 4), (6, 4),

(3, 1), (1, 3)

5

(5, 0), (5, 1), (5, 2), (5, 3),

(0, 5), (1, 5), (2, 5), (3, 5),

(5, 4), (5, 6)

(4, 5), (6, 5), (3, 2), (4, 2),

(2, 3), (2, 4)

6

(6, 0)

(0, 6)

2. The method of claim 1 , wherein the interval ‘ki’ ∈K, and (K: {k 0 , k 1 , . . . k M-1 }) for the subframe ‘n’ as defined in Table 2 below, K and M being integers:

TABLE 2

Downlink association set index K: {k 0 , k 1 , . . . k M-1 } for TDD

UL-DL

Subframe ‘n’

configuration

0

1

2

3

4

5

6

7

8

9

0

—

—

6

—

4

—

—

6

—

4

1

—

—

7, 6

4

—

—

—

7, 6

4

—

2

—

—

8, 7, 4, 6

—

—

—

—

8, 7, 4, 6

—

—

3

—

—

7, 6, 11

6, 5

5, 4

—

—

—

—

—

4

—

—

12, 8, 7, 11

6, 5, 4, 7

—

—

—

—

—

—

5

—

—

13, 12, 9, 8, 7, 5, 4, 11, 6

—

—

—

—

—

—

—

6

—

—

7

7

5

—

—

7

7

—

wherein the A/N responsive to the PDSCH transmitted in the subframe (n-ki) (0≤i≤M−1) is transmitted in the subframe ‘n’.

3. The method of claim 1 , further comprising:

transmitting another A/N in an uplink subframe determined by a reference UL-DL configuration for the PCell, the another A/N being responsive to a PDSCH transmission on the PCell,

wherein the reference UL-DL configuration for the PCell is the PCell TDD UL-DL configuration.

4. A method for receiving acknowledgement/negative acknowledgement (A/N) by a base station configured with at least two serving cells comprising a primary cell (PCell) and a secondary cell (SCell), having different Time Division Duplex (TDD) Uplink-Downlink (UL-DL) configurations, the method comprising:

transmitting a physical downlink shared channel (PDSCH) transmission on the SCell in a subframe ‘n-ki’, the n, k and i being integers; and

receiving the A/N responsive to the PDSCH transmission on the SCell in a subframe ‘n’ according to an interval, the interval ‘ki’ being determined based on a reference UL-DL configuration for the SCell,

wherein the PCell UL-DL configuration and the SCell UL-DL configuration are selected from among UL-DL configuration defined in Table 4-1 below:

TABLE 4-1

The PCell UL-DL configuration and the SCell

UL-DL configuration

Downlink-

to-Uplink

Uplink-

Switch

Downlink

point

Subframe number

configuration

periodicity

0

1

2

3

4

5

6

7

8

9

0

 5 ms

D

S

U

U

U

D

S

U

U

U

1

 5 ms

D

S

U

U

D

D

S

U

U

D

2

 5 ms

D

S

U

D

D

D

S

U

D

D

3

10 ms

D

S

U

U

U

D

D

D

D

D

4

10 ms

D

S

U

U

D

D

D

D

D

D

5

10 ms

D

S

U

D

D

D

D

D

D

D

6

 5 ms

D

S

U

U

U

D

S

U

U

D

where D denotes a downlink subframe, S denotes a special subframe, and U denotes an uplink subframe,

wherein the reference UL-DL configuration for the SCell is determined based on a PCell UL-DL configuration and SCell UL-DL configuration pair in Table 4-2 below:

TABLE 4-2

Reference UL-DL configuration for SCell

Reference UL-DL configuration for SCell

Reference

(PCell UL-DL

(PCell UL-DL

UL-DL

configuration, SCell

configuration, SCell

configuration

UL-DL configuration)

UL-DL configuration)

1

(1, 0), (1, 6)

(0, 1), (6, 1)

2

(2, 0), (2, 1), (2, 6)

(0, 2), (1, 2), (6, 2)

3

(3, 0), (3, 6)

(0, 3), (6, 3)

4

(4, 0), (4, 1), (4, 3), (4, 6)

(0, 4), (1, 4), (3, 4), (6, 4),

(3, 1), (1, 3)

5

(5, 0), (5, 1), (5, 2), (5, 3),

(0, 5), (1, 5), (2, 5), (3, 5),

(5, 4), (5, 6)

(4, 5), (6, 5), (3, 2), (4, 2),

(2, 3), (2, 4)

6

(6, 0)

(0, 6).

5. The method of claim 4 , wherein the interval ‘ki’ ∈K, and (K: {k 0 , k 1 , . . . k M-1 }) for the subframe ‘n’ as defined in Table 5 below, K and M being integers:

TABLE 5

Downlink association set index K: {k 0 , k 1 , . . . k M-1 } for TDD

UL-DL

configu-

Subframe ‘n’

ration

0

1

2

3

4

5

6

7

8

9

0

—

—

6

—

4

—

—

6

—

4

1

—

—

7, 6

4

—

—

—

7, 6

4

—

2

—

—

8, 7, 4, 6

—

—

—

—

8, 7, 4, 6

—

—

3

—

—

7, 6, 11

6, 5

5, 4

—

—

—

—

—

4

—

—

12, 8, 7, 11

6, 5, 4, 7

—

—

—

—

—

—

5

—

—

13, 12, 9, 8,

—

—

—

—

—

—

—

7, 5, 4, 11, 6

6

—

—

7

7

5

—

—

7

7

—

wherein the A/N responsive to the PDSCH transmitted in the subframe (n-ki) (0≤i≤M−1) is transmitted in the subframe ‘n’.

6. The method of claim 4 , further comprising:

receiving another A/N in an uplink subframe determined by a reference UL-DL configuration for the PCell, the another A/N being responsive to a PDSCH transmission on the PCell,

wherein the reference UL-DL configuration for the PCell is the PCell TDD UL-DL configuration.

7. A user equipment for transmitting acknowledgement/negative acknowledgement (A/N), configured with at least two serving cells comprising a primary cell (PCell) and a secondary cell (SCell), having different Time Division Duplex (TDD) Uplink-Downlink (UL-DL) configurations, the user equipment comprising:

a receiver to receive a physical downlink share channel (PDSCH) transmission on the SCell in a subframe ‘n-ki’, the n, k and i being an integers;

a controller to determine an interval ‘ki’ between the reception of the PDSCH transmission on the SCell and a responsive A/N transmission, the interval being, determined based on a reference UL-DL configuration for the SCell; and

a transmitter to transmit the A/N responsive to the PDSCH transmission on the SCell in a subframe ‘n’ according to the interval,

wherein the PCell UL-DL configuration and the SCell UL-DL configuration are selected from among UL-DL configuration defined in Table 7-1 below:

TABLE 7-1

The PCell UL-DL configuration and the SCell UL-DL configuration

Downlink-

Uplink-

to-Uplink

Downlink

Switch

configu-

point

Subframe number

ration

periodicity

0

1

2

3

4

5

6

7

8

9

0

 5 ms

D

S

U

U

U

D

S

U

U

U

1

 5 ms

D

S

U

U

D

D

S

U

U

D

2

 5 ms

D

S

U

D

D

D

S

U

D

D

3

10 ms

D

S

U

U

U

D

D

D

D

D

4

10 ms

D

S

U

U

D

D

D

D

D

D

5

10 ms

D

S

U

D

D

D

D

D

D

D

6

 5 ms

D

S

U

U

U

D

S

U

U

D

where D denotes a downlink subframe, S denotes a special subframe, and U denotes an uplink subframe,

wherein the reference UL-DL configuration for the SCell is determined based on a PCell UL-DL configuration and SCell UL-DL configuration pair in Table 7-2 below:

TABLE 7-2

Reference UL-DL configuration for SCell

Reference UL-DL configuration for SCell

Reference

(PCell UL-DL

(PCell UL-DL

Ul_DL

configuration, SCell

configuration, SCell

configuration

UL-DL configuration)

UL-DL configuration)

1

(1, 0), (1, 6)

(0, 1), (6, 1)

2

(2, 0), (2, 1), (2, 6)

(0, 2), (1, 2), (6, 2)

3

(3, 0), (3, 6)

(0, 3), (6, 3)

4

(4, 0), (4, 1), (4, 3), (4, 6)

(0, 4), (1, 4), (3, 4), (6, 4)

(3, 10, (1, 3)

5

(5, 0), (5, 1), (5, 2), (5, 3),

(0, 5), 91, 5), (2, 5), (3, 5),

(5, 4), (5, 6)

(4, 5), (6,5), (3, 2), (4, 2),

(2, 3), (2, 4)

6

(6, 0)

(0, 6).

8. The user equipment of claim 7 , wherein the interval ‘ki’ ∈K, and (K: {k 0 , k 1 , . . . k M-1 }) for the subframe ‘n’ as defined in Table 8 below, K and M being integers:

TABLE 8

Downlink association set index K: {k 0 , k 1 , . . . k M-1 } for TDD

UL-DL

configu-

Subframe ‘n’

ration

0

1

2

3

4

5

6

7

8

9

0

—

—

6

—

4

—

—

6

—

4

1

—

—

7, 6

4

—

—

—

7, 6

4

—

2

—

—

8, 7, 4, 6

—

—

—

—

8, 7, 4, 6

—

—

3

—

—

7, 6, 11

6, 5

5, 4

—

—

—

—

—

4

—

—

12, 8, 7, 11

6, 5, 4, 7

—

—

—

—

—

—

5

—

—

13, 12, 9, 8, 7, 5, 4, 11, 6

—

—

—

—

—

—

—

6

—

—

7

7

5

—

—

7

7

—

wherein the A/N responsive to the PDSCH transmitted in the subframe (n-ki) (0≤i≤M−1) is transmitted in the subframe ‘n’.

9. The user equipment of claim 7 , further comprising:

transmitting another A/N in an uplink subframe determined by a reference UL-DL configuration for the PCell, the another A/N being responsive to a PDSCH transmission on the PCell,

wherein the reference UL-DL configuration for the PCell is the PCell TDD UL-DL configuration.