COMMUNICATION METHOD IN WIRELESS COMMUNICATION SYSTEM ON BASIS OF CARRIER AGGREGATION

• US 20160157226A1
• Filed: 07/15/2014
• Published: 06/02/2016
• Est. Priority Date: 07/16/2013
• Status: Active Grant

• Current Assignee: Electronics and Telecommunications Research Institute
• Original Assignee: Electronics and Telecommunications Research Institute
• Inventors: Moon, Sung Hyun, Ko, Young Jo, Ahn, Jae Young, Kim, Cheul Soon, Shin, Joon Woo
• Granted Patent: US 9,986,557 B2
• Time in Patent Office: Days
• CPC Class Codes: H04B 7/2656 for structure of frame, burst
• CPC Class Codes: H04J 1/08 Arrangements for combining channels branching filters H01P1/213, H03H7/46
• CPC Class Codes: H04J 3/1694 Allocation of channels in TDM/TDMA networks, e.g. distributed multiplexers Passive Optical Networks H04Q11/0062
• CPC Class Codes: H04L 1/1812 Hybrid protocols; Hybrid automatic repeat request [HARQ]
• CPC Class Codes: H04L 1/1854 Scheduling and prioritising arrangements
• CPC Class Codes: H04L 1/1861 Physical mapping arrangements for ACK signaling see also H04L5/0053
• CPC Class Codes: H04L 5/001 the frequencies being arranged in component carriers
• CPC Class Codes: H04L 5/0055 Physical resource allocation for ACK/NACK for physical mapping arrangements in ARQ protocols H04L1/1861
• CPC Class Codes: H04L 5/1469 using time-sharing
• CPC Class Codes: H04W 72/0446 Resources in time domain, e.g. slots or frames
• CPC Class Codes: H04W 72/20 Control channels or signalling for resource management

Abstract

Disclosed is a communication method in a wireless communication system on the basis of a carrier aggregation. The communication method on the basis of a carrier aggregation comprises the steps of: receiving a PDSCH from a base station via a subframe n of a TDD cell; and transmitting, to the base station, a PUCCH including a response to the PDSCH via a subframe n+4 of an FDD cell. Accordingly, an HARQ process may be performed efficiently.

Claims

1. A communication method based on carrier aggregation, performed in a terminal, the method comprising:

receiving a physical downlink shared channel (PDSCH) from a base station through a n-th subframe of a time division duplexing (TDD) cell, wherein n is a natural number; and

transmitting a physical uplink control channel (PUCCH) including a response to the PDSCH to the base station through a (n+4)-th subframe of a frequency division duplexing (FDD) cell.

2. The method of claim 1, wherein the n-th subframe of the TDD cell is a downlink subframe or a special subframe.

3. The method of claim 1, wherein the TDD cell is a secondary cell.

4. The method of claim 1, wherein the FDD cell is a primary cell.

5. A communication method based on carrier aggregation, performed in a terminal, the method comprising:

receiving a physical downlink shared channel (PDSCH) from a base station through a n-th subframe of a frequency division duplexing (FDD) cell, wherein n is a natural number; and

when a (n+4)-th subframe of a time division duplexing (TDD) cell is an uplink subframe, transmitting a physical uplink control channel (PUCCH) including a response to the PDSCH to the base station through the (n+4)-th subframe of a time division duplexing (TDD) cell.

6. The method of claim 5, further comprising:

when the (n+4)-th subframe of the TDD cell is not an uplink subframe, transmitting the PUCCH including the response to the PDSCH to the base station through an uplink subframe which is the closest to the (n+4)-th subframe after the (n+4)-th subframe.

7. The method of claim 5, wherein the FDD cell is a secondary cell.

8. The method of claim 5, wherein the TDD cell is a primary cell.

9. A communication method based on carrier aggregation, performed in a terminal, the method comprising:

receiving a physical downlink shared channel (PDSCH) from a base station through a n-th subframe of a frequency division duplexing (FDD) cell; and

when a first subframe, which is an uplink subframe according to a UL-DL (Uplink/Downlink) configuration of the TDD cell, corresponds to the n-th subframe, transmitting a physical uplink control channel (PUCCH) including a response to the PDSCH to the base station through the first subframe of the TDD cell, wherein n is a natural number.

10. The method of claim 9, further comprising:

when the first subframe does not correspond to the n-th subframe, transmitting the PUCCH including the response to the PDSCH to the base station through an uplink subframe conforming to a predetermined downlink-uplink subframe relation among uplink subframes of the TDD cell.

11. The method of claim 10, wherein the uplink subframe conforming to the predetermined downlink-uplink subframe relation is an uplink subframe which is the closest to the (n+4)-th subframe after the (n+4)-th subframe.

12. The method of claim 10, wherein the uplink subframe conforming to the predetermined downlink-uplink subframe relation is a (n+5)-th uplink subframe of the TDD cell.

13. The method of claim 10, wherein the uplink subframe conforming to the predetermined downlink-uplink subframe relation is a first uplink subframe included in a next radio frame of the TDD cell.

14. The method of claim 9, wherein the FDD cell is a secondary cell.

15. The method of claim 9, wherein the TDD cell is a primary cell.

16. A communication method based on carrier aggregation, performed in a terminal, the method comprising:

receiving a physical downlink shared channel (PDSCH) including an uplink grant from a base station through a n-th subframe of a frequency division duplexing (FDD) cell;

transmitting a physical uplink shared channel (PUSCH) based on the uplink grant to the base station through a (n+k)-th subframe of a time division duplexing (TDD) cell; and

receiving a physical hybrid-ARQ indicator channel (PHICH) including a response to the PUSCH from the base station through a (n+10)-th subframe of the FDD cell,

wherein k and l are natural numbers.

17. The method of claim 16, wherein k is 4.

18. The method of claim 16, wherein k is 5.

19. The method of claim 16, wherein k is 6.

20. The method of claim 16, wherein the TDD cell is cross-carrier-scheduled by the FDD cell.