Method and apparatus for transmitting uplink signals in wireless communication system

• US 9,813,219 B2
• Filed: 01/03/2014
• Issued: 11/07/2017
• Est. Priority Date: 01/03/2013
• Status: Expired due to Fees

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Yang, Suckchel, Ahn, Joonkui, Seo, Dongyoun, Yi, Yunjung
• Primary Examiner(s): Acolatse, Kodzovi
• Application Number:
  US14/759,177
• Publication Number:
  US 20150341923A1
• Time in Patent Office: 1,404 Days
• Field of Search: 370329
• CPC Class Codes: H04L 1/1671 the supervisory signal being transmitted together with control information
• CPC Class Codes: H04L 1/18 Automatic repetition systems, e.g. Van Duuren systems
• CPC Class Codes: H04L 1/1854 Scheduling and prioritising arrangements
• CPC Class Codes: H04L 1/1861 Physical mapping arrangements for ACK signaling see also H04L5/0053
• CPC Class Codes: H04L 27/2607 Cyclic extensions
• CPC Class Codes: H04L 5/00 Arrangements affording multiple use of the transmission path
• CPC Class Codes: H04L 5/001 the frequencies being arranged in component carriers
• 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 52/146 Uplink power control
• CPC Class Codes: H04W 52/281 taking into account user or data type priority
• CPC Class Codes: H04W 52/325 Power control of control or pilot channels
• CPC Class Codes: H04W 52/34 TPC management, i.e. sharing limited amount of power among users or channels or data types, e.g. cell loading
• CPC Class Codes: H04W 52/365 Power headroom reporting
• CPC Class Codes: H04W 52/367 Power values between minimum and maximum limits, e.g. dynamic range
• CPC Class Codes: H04W 52/40 during macro-diversity or soft handoff
• CPC Class Codes: H04W 52/50 at the moment of starting communication in a multiple access environment
• CPC Class Codes: H04W 52/58 Format of the TPC bits
• CPC Class Codes: H04W 72/0446 Resources in time domain, e.g. slots or frames
• CPC Class Codes: H04W 72/0453 Resources in frequency domain, e.g. a carrier in FDMA
• 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 76/15 : Setup of multiple wireless link connections
• CPC Class Codes: H04W 88/02 : Terminal devices

Abstract

The present invention relates to a wireless communication system. More particularly, the present invention relates to a method and an apparatus for a terminal transmitting ACK/NACK information in a carrier aggregation-based wireless communication system, comprising the steps of: receiving one or more PDCCH signals from a specific SF section in an FDD cell; receiving one or more PDSCH signals indicated by the one or more PDCCH signals; and transmitting ACK/NACK information corresponding to the one or more PDSCH signals through a physical uplink control channel (PUCCH), wherein the specific SF section includes one or more first SFs and one second SF, wherein PUCCH transmission is limited in one or more first UL SFs corresponding to the one or more first SFs, wherein PUCCH transmission is allowed from a second UL SF corresponding to the second SF, the ACK/NACK information is transmitted from the second UL SF by using a PUCCH resource allocated by an upper layer when a PDSCH signal exists in the one or more first SFs, and wherein the ACK/NACK information is transmitted from the second UL SF by using a PUCCH resource linked to an index of a resource from which a corresponding PDCCH signal is transmitted when one PDSCH signal exists only in the second SF.

Claims

1. A method for transmitting, by a user equipment (UE), acknowledgement/negative acknowledgement (ACK/NACK) information in a carrier aggregation based wireless communication system, comprising:

receiving one or more physical downlink control channel (PDCCH) signals in a subframe (SF) interval of a first frequency division duplex (FDD) cell,

wherein the SF interval of the first FDD cell includes one or more first downlink (DL) SFs of the first FDD cell and one last second DL SF of the first FDD cell;

receiving one or more physical downlink shared channel (PDSCH) signals indicated by the one or more PDCCH signals in the SF interval of the first FDD cell; and

transmitting ACK/NACK information corresponding to the one or more PDSCH signals through a physical uplink control channel (PUCCH) in a second uplink (UL) SF of the first FDD cell corresponding to the last second DL SF of the first FDD cell,

wherein one or more first UL SFs corresponding to the one or more first DL SFs of the first FDD cell are used for ACK/NACK transmission for a second FDD cell, and not used for ACK/NACK transmission for the first FDD cell,

wherein, when at least one PDSCH signal is received in the one or more first DL SFs of the first FDD cell, the ACK/NACK information includes ACK/NACK responses for all DL SFs of the SF interval of the first FDD cell and is transmitted in the second UL SF of the first FDD cell by using a PUCCH resource allocated by an upper layer, and

wherein, when one PDSCH signal is received only in the last second DL SF of the first FDD cell, the ACK/NACK information includes an ACK/NACK response only for the last second DL SF of the first FDD cell and is transmitted in the second UL SF of the first FDD cell by using a PUCCH resource linked to an index of a resource through which a PDCCH signal corresponding to the PDSCH signal is transmitted.

2. The method according to claim 1,

wherein, when at least one PDSCH signal is received in the one or more first SFs of the first FDD cell, the ACK/NACK information is transmitted using a PUCCH resource indicated by a value of a transmit power control (TPC) field of corresponding at least one PDCCH signal, and

wherein the TPC field value indicates one of a plurality of PUCCH resources allocated by the upper layer.

3. The method according to claim 2, wherein, when at least one PDSCH signal is received in the one or more first SFs of the first FDD cell, the ACK/NACK information is transmitted using PUCCH format 3.

4. The method according to claim 1, wherein, when one PDSCH signal is received only in the second SF of the first FDD cell, the ACK/NACK information is transmitted using a PUCCH resource acquired using a starting control channel element (CCE) index from among one or more CCE indices corresponding to one or more CCEs used to transmit a corresponding PDCCH signal.

5. The method according to claim 4, wherein, when one PDSCH signal is received only in the second SF of the first FDD cell, the ACK/NACK information is transmitted using PUCCH format 1a or PUCCH format 1b.

6. A user equipment (UE) configured to transmit acknowledgement/negative acknowledgement (ACK/NACK) information in a carrier aggregation based wireless communication system, comprising:

a radio frequency (RF) unit; and

a processor, wherein the processor is configured to

receive one or more physical downlink control channel (PDCCH) signals in a subframe (SF) interval of a first frequency division duplex (FDD) cell,

wherein the SF interval of the first FDD cell includes one or more first downlink (DL) SFs of the first FDD cell and one last second DL SF of the first FDD cell,

receive one or more PDSCH signals indicated by the one or more PDCCH signals in the SF interval of the first FDD cell, and

transmit ACK/NACK information corresponding to the one or more PDSCH signals through a physical uplink control channel (PUCCH) in a second uplink (UL) SF of the first FDD cell corresponding to the last second DL SF of the first FDD cell,

wherein one or more first UL SFs corresponding to the one or more first DL SFs of the first FDD cell are used for ACK/NACK transmission for a second FDD cell, and not used for ACK/NACK transmission for the first FDD cell,

wherein, when at least one PDSCH signal is received in the one or more first DL SFs of the first FDD cell, the ACK/NACK information includes ACK/NACK responses for all DL SFs of the SF interval of the first FDD cell and is transmitted in the second UL SF of the first FDD cell by using a PUCCH resource allocated by an upper layer,

wherein, when one PDSCH signal is received only in the last second DL SF of the first FDD cell, the ACK/NACK information includes an ACK/NACK response only for the last second DL SF of the first FDD cell and is transmitted in the second UL SF of the first FDD cell by using a PUCCH resource linked to an index of a resource through which a PDCCH signal corresponding to the PDSCH signal is transmitted.

7. The UE according to claim 6,

wherein, when at least one PDSCH signal is received in the one or more first SFs of the first FDD cell, the ACK/NACK information is transmitted using a PUCCH resource indicated by a value of a transmit power control (TPC) field of corresponding at least one PDCCH signal,

wherein the TPC field value indicates one of a plurality of PUCCH resources allocated by the upper layer.

8. The UE according to claim 7, wherein, when at least one PDSCH signal is received in the one or more first SFs of the first FDD cell, the ACK/NACK information is transmitted using PUCCH format 3.

9. The UE according to claim 6, wherein, when one PDSCH signal is received only in the second SF of the first FDD cell, the ACK/NACK information is transmitted using a PUCCH resource acquired using a starting control channel element (CCE) index from among one or more CCE indices corresponding to one or more CCEs used to transmit a corresponding PDCCH signal.

10. The UE according to claim 9, wherein, when one PDSCH signal is received only in the second SF of the first FDD cell, the ACK/NACK information is transmitted using PUCCH format 1a or PUCCH format 1b.