Method and apparatus for determining number of HARQ processes in wireless communication system

• US 10,193,663 B2
• Filed: 07/19/2017
• Issued: 01/29/2019
• Est. Priority Date: 12/18/2012
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Seo, Dongyoun, Ahn, Joonkui, Yang, Suckchel, Yi, Yunjung, Hwang, Daesung
• Primary Examiner(s): Phillips, Hassan A
• Assistant Examiner(s): Sharma, Gautam
• Application Number:
  US15/654,620
• Publication Number:
  US 20170324521A1
• Time in Patent Office: 559 Days
• Field of Search: None
• CPC Class Codes: H04B 7/15557 Selecting relay station operation mode, e.g. between amplify and forward mode, decode and forward mode or FDD - and TDD mode
• CPC Class Codes: H04L 1/1812 Hybrid protocols; Hybrid automatic repeat request [HARQ]
• CPC Class Codes: H04L 1/1822 involving configuration of automatic repeat request [ARQ] with parallel processes
• CPC Class Codes: H04L 1/1854 Scheduling and prioritising arrangements
• 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 16/32 Hierarchical cell structures
• CPC Class Codes: H04W 48/12 using downlink control channel
• CPC Class Codes: H04W 72/21 in the uplink direction of a wireless link, i.e. towards the network
• CPC Class Codes: H04W 74/002 Transmission of channel access control information
• CPC Class Codes: H04W 74/004 in the uplink, i.e. towards network
• CPC Class Codes: H04W 74/006 in the downlink, i.e. towards the terminal
• CPC Class Codes: H04W 76/19 Connection re-establishment
• CPC Class Codes: H04W 84/025 with acknowledge back capability

Abstract

Provided are a method for determining the number of hybrid automatic repeat request (HARQ) processes in a carrier aggregated system configured with a plurality of serving cells, and an apparatus using such a method. The method receives data from a downlink subframe of a second serving cell, and transmits an ACK/NACK signal for the data from an uplink subframe of a first serving cell, wherein the first serving cell uses a first-type frame, the second serving cell uses a second-type frame, and the number of HARQ processes in the second serving cell are determined with respect to each subframe comprised in the second-type frame and on the basis of the number of downlink subframes comprised in each section comprising a set number of subframes.

Claims

1. A method for determining a number of hybrid automatic repeat request (HARQ) processes in a carrier aggregation system in which a plurality of serving cells are configured, the method performed by a user equipment and comprising:

receiving data in a downlink subframe of a second serving cell; and

transmitting a positive acknowledgement/negative-acknowledgement (ACK/NACK) signal in response to the data in an uplink subframe of a first serving cell,

wherein the first serving cell uses a frequency division duplex (FDD) frame and the second serving cell uses either a time division duplex (TDD) frame or a FDD frame,

wherein when the second serving cell uses the TDD frame, the TDD frame is configured with any one of uplink-downlink configurations according to a table as follows;

2. The method of claim 1, wherein the maximum number of HARQ processes of the first serving cell is 8.

3. The method of claim 1, wherein the first serving cell is a primary cell that the user equipment performs an initial connection establishment procedure or a connection reestablishment procedure with a base station, and

wherein the second serving cell is a secondary cell which is additionally allocated to the user equipment in addition to the primary cell.

4. A user equipment, comprising:

a radio frequency (RF) unit configured to transmit and receive a radio signal; and

a processor connected to the RF unit,

wherein the processor is configured to;

receive data in a downlink subframe of a second serving cell and transmit a positive acknowledgement/negative-acknowledgement (ACK/NACK) signal in response to the data in an uplink subframe of a first serving cell,

wherein the first serving cell uses a frequency division duplex (FDD) frame and the second serving cell uses either a time division duplex (TDD) frame or a FDD frame,

wherein when the second serving cell uses the TDD frame, the TDD frame is configured with any one of uplink-downlink configurations according to a table as follows;

5. The user equipment of claim 4, wherein the maximum number of HARQ processes of the first serving cell is 8.

6. The user equipment of claim 4, wherein the first serving cell is a primary cell that the user equipment performs an initial connection establishment procedure or a connection reestablishment procedure with a base station, and

wherein the second serving cell is a secondary cell which is additionally allocated to the user equipment in addition to the primary cell.

7. A method for performing hybrid automatic repeat request (HARQ) processes in a carrier aggregation system, the method performed by a base station and comprising:

transmitting data in a downlink subframe of a second serving cell; and

receiving a positive acknowledgement/negative-acknowledgement (ACK/NACK) signal in response to the data in an uplink subframe of a first serving cell,

wherein when the second serving cell uses the TDD frame, the TDD frame is configured with any one of uplink-downlink configurations according to a table as follows;

8. The method of claim 7, wherein the maximum number of HARQ processes of the first serving cell is 8.

9. The method of claim 7, wherein the first serving cell is a primary cell that a user equipment performs an initial connection establishment procedure or a connection reestablishment procedure with the base station, and

wherein the second serving cell is a secondary cell which is additionally allocated to the user equipment in addition to the primary cell.

10. A base station, comprising:

a radio frequency (RF) unit configured to transmit and receive a radio signal; and

a processor connected to the RF unit,

wherein the processor is configured to;

transmit data in a downlink subframe of a second serving cell and

receive a positive acknowledgement/negative-acknowledgement (ACK/NACK) signal in response to the data in an uplink subframe of a first serving cell,

wherein when the second serving cell uses the TDD frame, the TDD frame is configured with any one of uplink-downlink configurations according to a table as follows;

11. The base station of claim 10, wherein the maximum number of HARQ processes of the first serving cell is 8.

12. The base station of claim 10, wherein the first serving cell is a primary cell that a user equipment performs an initial connection establishment procedure or a connection reestablishment procedure with the base station, and

wherein the second serving cell is a secondary cell which is additionally allocated to the user equipment in addition to the primary cell.