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

• US 9,749,093 B2
• Filed: 12/18/2013
• Issued: 08/29/2017
• 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): Cattungal, Ajay
• Assistant Examiner(s): Sharma, Gautam
• Application Number:
  US14/649,490
• Publication Number:
  US 20150304074A1
• Time in Patent Office: 1,350 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 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 if the second serving cell uses a time division duplex (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 a 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. An apparatus, comprising:

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

a processor connected to the RF unit,

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 if the second serving cell uses a time division duplex (TDD) frame, the TDD frame is configured with any one of uplink-downlink configurations according to a table as follows;

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

6. The apparatus of claim 4, wherein the first serving cell is a primary cell that the apparatus 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 apparatus in addition to the primary cell.