Abstract
A method and apparatus for transmitting ACK/NACK information in a wireless communication system are disclosed. In accordance with a method for transmitting ACK/NACK information an ACK/NACK signal of downlink transmission in a downlink subframe set is transmitted in a single uplink subframe. In this case if a first physical uplink control channel (PUCCH) format is established by a higher layer for a downlink receiver and if one physical downlink shared channel (PDSCH) is transmitted in a downlink subframe set the ACK/NACK information can be transmitted using a second PUCCH format on PUCCH resources established by a higher layer for the second PUCCH format.
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| 4G,3G | 03/10/2014 | ISLD-201409-053 | LG | Yes | Family Member | ||||
| 5G | 28/10/2018 | ISLD-201810-076 | LG |
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Specification Information
Specification Information
Technologies
Family Information
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| Publication No | Technology | Declaration Information | Specification Information | Explicitly Disclosed | Patent Type | Status | National Phase Entries | |||||
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Technologies
Resource configuration
Product
Relay nodeBase Station (eNB/gNB)
Use Cases
Wireless communication
Services
Relayed Communication
Claim
1. A method for transmitting ACK/NACK information by a relay node (RN) in a wireless communication system, the method comprising:
determining a physical uplink control channel (PUCCH) format and resource which are used for transmitting ACK/NACK information in response to a backhaul downlink transmission within a downlink subframe set, wherein the downlink subframe set includes M downlink subframes where M?1, and the M downlink subframes are configured as Multicast Broadcast Single Frequency Network (MBSFN) subframes by the RN; and
transmitting the ACK/NACK information through a backhaul uplink using the PUCCH format and resource in a single uplink subframe,
wherein, when the RN is configured with a PUCCH format 3 and when one physical downlink shared channel (PDSCH) is transmitted within the downlink subframe set, the ACK/NACK information is transmitted using a PUCCH format 1a/1b on a PUCCH resource configured by a higher layer for the PUCCH format 1a/1b.
2. The method according to claim 1, wherein a physical downlink control channel (PDCCH) for the RN is mapped to remaining OFDM symbols other than initial N OFDM symbols (where N<3) of a subframe.
3. The method according to claim 2, wherein the PDCCH for the RN is an R-PDCCH.
4. The method according to claim 1, wherein:
if two or more downlink assignment PDCCHs are transmitted within the downlink subframe set, one PUCCH resource for the PUCCH format 3 from among PUCCH resources configured by a higher layer for the PUCCH format 3 is decided by a transmission power control (TPC) field of a PDCCH having a downlink assignment index (DAI) higher than 1 (DAI>1).
5. The method according to claim 4, wherein the ACK/NACK information is transmitted using the PUCCH format 3 on the decided one PUCCH resource for the PUCCH format 3.
6. The method according to claim 1, wherein the wireless communication system is a time division duplex (TDD) wireless communication system.
7. The method according to claim 1, wherein more than one serving cell is configured for the RN.
8. A method for receiving ACK/NACK information from a relay node (RN) by a base station in a wireless communication system, the method comprising:
performing a backhaul downlink transmission within a downlink subframe set, wherein the downlink subframe set includes M downlink subframes where M?1, and the M downlink subframes are configured as Multicast Broadcast Single Frequency Network (MBSFN) subframes by the RN; and
receiving ACK/NACK information through a backhaul uplink, in response to the backhaul downlink transmission in a single uplink subframe,
wherein, when the RN is configured with a PUCCH format 3 and when one physical downlink shared channel (PDSCH) is transmitted within the downlink subframe set, the ACK/NACK information is received using a PUCCH format 1a/1b on a PUCCH resource configured by a higher layer for the PUCCH format 1a/1b.
9. A relay node (RN) for transmitting ACK/NACK information in a wireless communication system, comprising:
a Rx module for receiving a downlink signal from a base station through a backhaul downlink;
a Tx module for transmitting an uplink signal to the base station through a backhaul uplink; and
a processor for controlling the RN including the Rx module and the Tx module,
wherein the processor is configured to:
determine a physical uplink control channel (PUCCH) format and resource which are used for transmitting ACK/NACK information in response to a backhaul downlink transmission within a downlink subframe set, wherein the downlink subframe set included M downlink subframes where M?1, and the M downlink subframes are configured as Multicast Broadcast Single Frequency Network (MBSFN) subframes by the RN; and
transmit the ACK/NACK information through a backhaul uplink using the PUCCH format and resource in a single uplink subframe,
wherein, when the RN is configured with a PUCCH format 3 and when one physical downlink shared channel (PDSCH) is transmitted within the downlink subframe set, the ACK/NACK information is transmitted using a PUCCH format 1a/1b on a PUCCH resource configured by a higher layer for the PUCCH format 1a/1b.
10. A base station for receiving ACK/NACK information from a relay node (RN) in a wireless communication system, comprising:
a Rx module for receiving an uplink signal from the RN through a backhaul uplink;
a Tx module for transmitting a downlink signal to the RN through a backhaul downlink; and
a processor for controlling the base station including the Rx module and the Tx module,
wherein the processor is configured to:
perform a backhaul downlink transmission within a downlink subframe set through the Tx module, wherein the downlink subframe set includes M downlink subframes where M?1, and the M downlink subframes are configured as Multicast Broadcast Single Frequency Network (MBSFN) subframes by the RN; and
receive ACK/NACK information through a backhaul uplink, in response to the backhaul downlink transmission in a single uplink subframe through the Rx module,
wherein, when the RN is configured with a PUCCH format 3 and when one physical downlink shared channel (PDSCH) is transmitted within the downlink subframe set, the ACK/NACK information is received using a PUCCH format 1a/1b on a PUCCH resource configured by a higher layer for the PUCCH format 1a/1b.
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SUMMARY
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