METHOD FOR TRANSRECEIVING SIGNALS AND APPARATUS FOR SAME

• US 20150016315A1
• Filed: 02/12/2013
• Published: 01/15/2015
• Est. Priority Date: 02/09/2012
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Yang, Suckchel, Seo, Dongyoun, Kim, Bonghoe, Ahn, Joonkui
• Granted Patent: US 9,531,519 B2
• Time in Patent Office: Days
• US Class Current: 370/280
• CPC Class Codes: H04J 3/00 Time-division multiplex systems H04J14/00 takes precedence; relay systems H04B7/14; selecting techniques H04Q
• CPC Class Codes: H04L 1/1812 Hybrid protocols; Hybrid automatic repeat request [HARQ]
• CPC Class Codes: H04L 1/1819 with retransmission of additional or different redundancy
• CPC Class Codes: H04L 1/1822 involving configuration of automatic repeat request [ARQ] with parallel processes
• CPC Class Codes: H04L 1/1835 Buffer management
• 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 1/1864 ARQ related signaling H04L1/1607 takes precedence
• CPC Class Codes: H04L 1/1896 ARQ related signaling
• 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 5/14 Two-way operation using the same type of signal, i.e. duplex
• CPC Class Codes: H04L 5/1469 using time-sharing
• CPC Class Codes: H04W 72/21 in the uplink direction of a wireless link, i.e. towards the network
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal

Abstract

The present invention relates to a wireless communication system. More particularly, the present invention relates to a method for transmitting an uplink signal in a wireless communication system supporting carrier aggregation (CA), and to an apparatus for same, comprising the steps of: establishing a first cell having a first time division duplex (TDD) uplink-downlink (UL-DL) configuration and a second cell having a second TDD UL-DL configuration; receiving data through a DL subframe of the first cell; and transmitting reception reply information with respect to the data through a UL subframe of the second cell.

Claims

1. A method for transmitting an uplink signal by a communication apparatus in a wireless communication system supporting carrier aggregation (CA), the method comprising:

configuring a first cell of a first time division duplex (TDD) uplink (UL)-downlink (DL) configuration and a second cell of a second TDD UL-DL configuration;

receiving data through a DL subframe of the first cell; and

transmitting acknowledgement information for the data through a UL subframe of the second cell,

wherein a relationship between the DL subframe and the UL subframe is determined by a parameter value configured in a specific TDD UL-DL configuration within a TDD UL-DL configuration set,

the specific TDD UL-DL configuration is a TDD UL-DL configuration having a smallest number of DL subframes among one or more TDD UL-DL configurations in which DL is configured in all subframes configured as DL configured in the first cell or the second cell, and

timing for transmitting the acknowledgement information is configured only at subframe timing at which a subframe combination of the second cell and the first cell is (DL subframe, DL or special subframe) or (special subframe, special subframe).

2. The method according to claim 1, wherein the TDD UL-DL configuration set includes a plurality of TDD UL-DL configurations defined as follows:

3. The method according to claim 2, wherein the DL subframe is subframe #n−

k (where kε

K), the UL subframe is subframe #n, K;

{k₀, k₁, . . . k<sub>M−

1</sub>} is defined according to TDD UL-DL configurations by the following table, and M is an integer equal to or greater than 1;

4. The method according to claim 1, wherein the first cell is a secondary cell and the second cell is a primary cell.

5. The method according to claim 1, wherein the first TDD UL-DL configuration is different from the second TDD UL-DL configuration.

6. The method according to claim 1, wherein the communication apparatus is configured to operate in a half duplex time division duplex (HD-TDD) CA.

7. A communication apparatus for transmitting an uplink signal in a wireless communication system supporting carrier aggregation (CA), the communication apparatus comprising:

a radio frequency (RF) unit; and

a processor,

wherein the processor is configured to configure a first cell of a first time division duplex (TDD) uplink (UL)-downlink (DL) configuration and a second cell of a second TDD UL-DL configuration, receive data through a DL subframe of the first cell, and transmit acknowledgement information for the data through a UL subframe of the second cell,

a relationship between the DL subframe and the UL subframe is determined by a parameter value configured in a specific TDD UL-DL configuration within a TDD UL-DL configuration set,

the specific TDD UL-DL configuration is a TDD UL-DL configuration having a smallest number of DL subframes among one or more TDD UL-DL configurations in which DL is configured in all subframes configured as DL configured in the first cell or the second cell, and

timing for transmitting the acknowledgement information is configured only at subframe timing at which a subframe combination of the second cell and the first cell is (DL subframe, DL or special subframe) or (special subframe, special subframe).

8. The communication apparatus according to claim 7, wherein the TDD UL-DL configuration set includes a plurality of TDD UL-DL configurations defined as follows:

9. The communication apparatus according to claim 8, wherein the DL subframe is subframe #n−

k (where kε

K), the UL subframe is subframe #n, K;

{k₀, k₁, . . . k<sub>M−

1</sub>} is defined according to TDD UL-DL configurations by the following table, and M is an integer equal to or greater than 1;

10. The communication apparatus according to claim 7, wherein the first cell is a secondary cell and the second cell is a primary cell.

11. The communication apparatus according to claim 7, wherein the first TDD UL-DL configuration is different from the second TDD UL-DL configuration.

12. The communication apparatus according to claim 7, wherein the communication apparatus is configured to operate in a half duplex time division duplex (HD-TDD) CA.