Granted Patent B2

US 9,820,237 · App. 14/759,161 · Granted Nov 14, 2017

Inventors: Suckchel Yang (Seoul, KR); Joonkui Ahn (Seoul, KR); Dongyoun Seo (Seoul, KR); Yunjung Yi (Seoul, KR)

Assignee: LG ELECTRONICS INC.

H04W52/146H04L1/1861H04L5/001H04L5/0055H04L5/14H04L27/2607H04W52/281H04W52/325H04W52/34H04W52/367H04W52/58H04W72/0406H04W72/0413H04W72/0453H04W72/0446H04W88/02

Abstract

Claims (593)

1. A method for transmitting, by a user equipment (UE), acknowledgement/negative acknowledgement (ACK/NACK) information in a carrier aggregation based wireless communication system, comprising:

aggregating a first time division duplex (TDD) cell having a first uplink downlink (UD) configuration and a second TDD cell having the first UD configuration;

transmitting ACK/NACK information corresponding to the first TDD cell through a first physical uplink control channel, PUCCH in a first UL subframe (SF) on the first TDD cell; and

transmitting ACK/NACK information corresponding to the second TDD cell through a UL SF on the second TDD cell,

wherein a timing of the first UL SF is provided as ACK/NACK transmission timing of a second UD configuration, and a timing of the second UL SF is provided as a sum of a shift value and the ACK/NACK transmission timing of the second UD configuration,

wherein UL SFs of the second UD configuration are a subset of UL SFs of the first UD configuration,

wherein SF configurations according to UD configurations are as follows,

Uplink-

Downlink-

downlink

to-Uplink

config-

Switch-point

Subframe number

uration

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

wherein D indicates a DL SF, U indicates a UL SF and S indicates a special SF, and

wherein the ACK/NACK transmission timing of the second UD configuration is provided as follows,

TDD UL-DL

Config-

Subframe n

uration

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,

—

—

—

—

8, 7,

—

—

4, 6

4, 6

3

—

—

7, 6, 11

6, 5

5,

—

—

—

—

—

4

4

—

—

12, 8,

6, 5,

—

—

—

—

—

—

7, 11

4, 7

5

—

—

13, 12,

—

—

—

—

—

—

—

9, 8,

7, 5, 4,

11, 6

6

—

—

7

7

5

—

—

7

7

 —.

2. The method according to claim 1 , wherein a DL SF set of the second UD configuration includes a DL SF set according to the first UD configuration and has a larger number of DL SFs than the first UD configuration.

3. The method according to claim 1 , wherein the shift value is determined so that the timing of the first UL SF is not overlapped with the timing of the second UL SF in a time domain.

4. The method according to claim 1 , wherein the ACK/NACK information transmitted in the first subframe #n corresponds to DL SF #n−k n of the first TDD cell, and the ACK/NACK information transmitted in the second subframe #m corresponds to DL SF #[m−(k m−a +a)] of the second TDD cell, wherein k i is a set of k for subframe #i and represents the ACK/NACK transmission timing of the second UD configuration, and a indicates the shift value

TDD UL-DL

Config-

Subframe n

uration

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,

—

—

—

—

8, 7,

—

—

4, 6

4, 6

4

—

—

12, 8,

6, 5,

—

—

—

—

—

—

7, 11

4, 7

5

—

—

13, 12,

—

—

—

—

—

—

—

9, 8,

7, 5,

4, 11, 6

6

—

—

7

7

5

—

—

7

7

 —.

5. The method according to claim 1 , wherein the first TDD cell belongs to a first eNB and the second TDD cell belongs to a second eNB different from the first eNB, and the first and second eNBs are eNBs in an inter-site aggregation applied to the UE.

6. A user equipment (UE) configured to transmit acknowledgement/negative acknowledgement (ACK/NACK) information in a carrier aggregation based wireless communication system, comprising:

a radio frequency (RF) unit; and

a processor,

wherein, the processor is configured to aggregate a first time division duplex (TDD) cell having a first uplink downlink (UD) configuration and a second TDD cell having the first UD configuration, to transmit ACK/NACK information corresponding to the first TDD cell through a first physical uplink control channel, PUCCH in a first UL subframe (SF) on the first TDD cell and to transmit ACK/NACK information corresponding to the second TDD cell through a second PUCCH in a second UL SF on the second TDD cell,

wherein a timing of the first UL SF timing is provided as ACK/NACK transmission timing of a second UD configuration, and a timing of the second UL SF timing is provided as a sum of a shift value and ACK/NACK transmission timing of the second UD configuration,

wherein UL SFs of the second UD configuration are a subset of UL SFs of the first UD configuration,

wherein SF configurations according to UD configurations are as follows,

Uplink-

Downlink-

downlink

to-Uplink

config-

Switch-point

Subframe number

uration

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

wherein D indicates a DL SF, U indicates a UL SF and S indicates a special SF, and

wherein the ACK/NACK transmission timing of the second UD configuration is provided as follows,

TDD

UL-DL

Config-

Subframe n

uration

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

—.

7. The UE according to claim 6 , wherein a DL SF set of the second UD configuration includes a DL SF set according to the first UD configuration and has a larger number of DL SFs than the first UD configuration.

8. The UE according to claim 6 , wherein the shift value is determined so that the timing of the first UL SF is not overlapped with the timing of the second UL SF in a time domain.

9. The UE according to claim 6 , wherein the ACK/NACK information transmitted in the first subframe #n corresponds to DL SF #n−k n of the first TDD cell, and the ACK/NACK information transmitted in the second subframe #m corresponds to DL SF #[m−(k m−a +a)] of the second TDD cell, wherein k, is a set of k for subframe #i and represents the ACK/NACK transmission timing of the second UD configuration, a indicates the shift value

TDD

UL-DL

Config-

Subframe n

uration

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

—

—

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

—.

10. The UE according to claim 6 , wherein the first TDD cell belongs to a first eNB and the second TDD cell belongs to a second eNB different from the first eNB, and the first and second eNBs are eNBs in an inter-site aggregation applied to the UE.

Assignments (1)

Continuity (11)