US 10,771,195 B2 · Method for controlling downlink HARQ in wireless communication system and device therefor

Abstract

Provided are an HARQ operation procedure and control method between a terminal and a base station. In the method, the terminal receives HARQ feedback bundling control information from the base station through RRC signaling and downlink control information (DCI), bundles HARQ feedbacks in response to reception results of one or more pieces of downlink data according to the HARQ feedback bundling control information, and transmits the bundled HARQ feedbacks. The base station extracts effective information from the HARQ feedback information on the basis of transmission subframe information and checks whether the terminal receives the downlink data, thereby enabling the terminal to transmit the HARQ feedbacks while minimizing uplink resources, and the base station to perform an HARQ operation by checking whether downlink data in each subframe has been successfully transmitted.

Claims18

Dependent claims

A method of processing a hybrid automatic repeat request (HARQ) of a terminal in a wireless communication system, the method comprising:

receiving a number of subframes for bundling a HARQ feedback of the terminal and a HARQ feedback information size through radio resource control (RRC) signaling;
receiving downlink data and downlink control information including position information of a subframe for transmitting the HARQ feedback and a HARQ feedback bundling sequence in one or more subframes;
receiving a HARQ feedback delay offset in at least one of the RRC signaling and the downlink control information;
determining, based on the received HARQ feedback delay offset, a number of subframes to wait before transmitting the HARQ feedback;
and
transmitting the HARQ feedback for one or more pieces of the downlink data in one subframe determined based on the determined number of subframes.

3 more elements

A method of receiving, by a base station, a hybrid automatic repeat request (HARQ) in a wireless communication system, the method comprising:

transmitting a number of subframes for bundling a HARQ feedback of a terminal, a HARQ feedback delay offset, and a HARQ feedback information size through radio resource control (RRC) signaling;
transmitting downlink data and downlink control information including position information of a subframe for transmitting the HARQ feedback and a HARQ feedback bundling sequence in one or more subframes;
and
receiving the HARQ feedback for one or more pieces of the downlink data in one subframe, the subframe received a determined number of subframes after the downlink data transmission is complete, the determined number of subframes dctcrmincd based on the HARQ feedback delay offset included in at least one of the RRC signaling and the downlink control information.

1 more element

A terminal for processing a hybrid automatic repeat request (HARQ) in a wireless communication system, the terminal comprising:

a receiver configured to receive a number of subframes for bundling a HARQ feedback and a HARQ feedback information size through radio resource control (RRC) signaling, receive downlink data and downlink control information including position information of a subframe for transmitting the HARQ feedback and a HARQ feedback bundling sequence in one or more subframes, and receive a HARQ feedback delay offset through at least one of the RRC signaling and the downlink control information;
and
a transmitter configured to transmit the HARQ feedback for one or more pieces of the downlink data in one subframe after a delay, the delay determined as a number of subframes based on the HARQ feedback delay offset.

Dependencies are inferred from the claim text.

Method for controlling downlink HARQ in wireless communication system and device therefor

Life of this patent

Method for controlling downlink HARQ in wireless communication system and device therefor

Life of this patent

Abstract

Claims18