Method for configuring a backhaul link subframe in a wireless communication system to which a carrier aggregation scheme is applied and an apparatus for the same

• US 9,413,512 B2
• Filed: 07/31/2015
• Issued: 08/09/2016
• Est. Priority Date: 03/03/2011
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Lee, Seungmin, Kim, Hakseong, Seo, Hanbyul
• Primary Examiner(s): Lee, Andrew
• Application Number:
  US14/815,224
• Publication Number:
  US 20150358140A1
• Time in Patent Office: 375 Days
• US Class Current: 1/1
• CPC Class Codes: H04J 11/0069 Cell search, i.e. determining cell identity [cell-ID] design of multiplexing codes H04J13/00; processing access restriction or access information H04W48/16; discovery of network devices for network data management H04W8/005; sounding signals for channel estimation H04L25/0226; structure of reference signals in multicarrier modulation systems H04L27/2613; frame, time or carrier synchronisation in multicarrier modulation systems H04L27/2655
• CPC Class Codes: H04L 25/22 Repeaters for converting two wires to four wires; Repeaters for converting single current to double current
• CPC Class Codes: H04L 5/001 the frequencies being arranged in component carriers
• CPC Class Codes: H04L 5/0053 Allocation of signaling, i.e. of overhead other than pilot signals
• 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: H04W 72/1273 of downlink data flows
• CPC Class Codes: H04W 72/20 Control channels or signalling for resource management
• 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
• CPC Class Codes: H04W 76/27 Transitions between radio resource control [RRC] states
• CPC Class Codes: H04W 88/02 Terminal devices
• CPC Class Codes: H04W 88/08 Access point devices

Abstract

A method for configuring a backhaul link subframe in a wireless communication system to which a carrier aggregation scheme is applied and an apparatus for the same are disclosed. The method comprises determining one of a plurality of subframe configurations as a first subframe configuration for a primary component carrier allocated to the relay node; configuring subframe configuration candidates for one or more secondary component carriers allocated to the relay node on the basis of the determined first subframe configuration; determining a second subframe configuration for each of the one or more secondary component carriers by using the configured subframe configuration candidates; and transmitting and receiving a signal to and from the relay node in accordance with the first subframe configuration and the second subframe configuration.

Claims

1. A method for processing signals at a user equipment in a TDD (Time Division Duplex) wireless communication system, wherein a first subframe configuration is configured for a primary cell and a second subframe configuration is configured for a secondary cell, the method comprising:

receiving, from a network, downlink data in a first subframe via the secondary cell; and

transmitting, to the network in a second subframe, ACK (acknowledgement)/NACK (negative-ACK) information for the downlink data via the primary cell,

wherein the first subframe configuration is a different configuration than the second subframe configuration,

wherein a first subframe according to both the first subframe configuration and the second subframe configuration is a downlink subframe, and

wherein the first subframe has an index n-k and the second subframe has an index n, and k is an integer determined based on the first subframe configuration.

2. The method of claim 1, further comprising:

receiving, from the network, a control channel in the first subframe via the primary cell, wherein the control channel includes downlink control information for the downlink data.

3. The method of claim 2, wherein the downlink control information includes scheduling information for the downlink data.

4. The method of claim 2, wherein the downlink control information includes a carrier indicator field (CIF) identifying the secondary cell.

5. The method of claim 1 further comprising:

receiving information on the first subframe configuration and the second subframe configuration via higher layer signaling.

6. The method of claim 5, wherein the higher layer signaling is Radio Resource Control layer signaling.

7. A method for transmitting and receiving signals between a user equipment and a base station in a TDD (Time Division Duplex) wireless communication system, the method comprising:

configuring a first subframe configuration for a primary cell and a second subframe configuration for a secondary cell;

transmitting, to the user equipment, downlink data in a first subframe via the secondary cell; and

receiving, from the user equipment in a second subframe, ACK (ACKnowledgement)/NACK (Negative-ACK) information for the downlink data,

wherein the first subframe configuration is a different configuration than the second subframe configuration,

wherein a first subframe according to both the first subframe configuration and the second subframe configuration is a downlink subframe, and

wherein the first subframe has an index n-k and the second subframe has an index n, and k is an integer determined based on the first subframe configuration.

8. The method of claim 7 further comprising:

transmitting, to the user equipment, a control channel in the first subframe via the primary cell, wherein the control channel includes downlink control information for the downlink data.

9. The method of claim 8, wherein the downlink control information includes scheduling information for the downlink data.

10. The method of claim 8, wherein the downlink control information includes a carrier indicator field (CIF) identifying the secondary cell.

11. The method of claim 7 further comprising:

transmitting, to the user equipment, the first subframe configuration and the second subframe configuration via higher layer signaling.

12. The method of claim 11, wherein the higher layer signaling is Radio Resource Control layer signaling.