Method and apparatus for transmitting uplink signals in wireless communication system

• US 9,820,237 B2
• Filed: 01/03/2014
• Issued: 11/14/2017
• Est. Priority Date: 01/03/2013
• Status: Active Grant

• 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): Phan, Man
• Application Number:
  US14/759,161
• Publication Number:
  US 20150341156A1
• Time in Patent Office: 1,411 Days
• Field of Search: 370232-318, 370328-336, 455352-522
• 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: aggregating a first TDD cell having a first UD configuration and a second TDD cell having the first UD configuration; transmitting ACK/NACK information corresponding to the first TDD cell through a UL SF on the first TDD cell; and transmitting ACK/NACK information corresponding to the second TDD cell through a UL SF on the second TDD cell, wherein the timing of the UL SF on the first TDD cell is provided as a UL SF set according to the first UD configuration, and the timing of the UL SF on the second TDD cell is provided based on a subset under the UL SF set according to the first UD configuration.

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:

aggregating a first time division duplex (TDD) cell having a first uplink downlink (UD) configuration and a second TDD cell having the first UD configuration;

transmitting ACK/NACK information corresponding to the first TDD cell through a first physical uplink control channel, PUCCH in a first UL subframe (SF) on the first TDD cell; and

transmitting ACK/NACK information corresponding to the second TDD cell through a UL SF on the second TDD cell,

wherein a timing of the first UL SF is provided as ACK/NACK transmission timing of a second UD configuration, and a timing of the second UL SF is provided as a sum of a shift value and the ACK/NACK transmission timing of the second UD configuration,

wherein UL SFs of the second UD configuration are a subset of UL SFs of the first UD configuration,

wherein SF configurations according to UD configurations are as follows,

2. The method according to claim 1, wherein a DL SF set of the second UD configuration includes a DL SF set according to the first UD configuration and has a larger number of DL SFs than the first UD configuration.

3. The method according to claim 1, wherein the shift value is determined so that the timing of the first UL SF is not overlapped with the timing of the second UL SF in a time domain.

4. The method according to claim 1, wherein the ACK/NACK information transmitted in the first subframe #n corresponds to DL SF #n−

k_n of the first TDD cell, and the ACK/NACK information transmitted in the second subframe #m corresponds to DL SF #[m−

(k<sub>m−

a</sub>+a)] of the second TDD cell, wherein k_i is a set of k for subframe #i and represents the ACK/NACK transmission timing of the second UD configuration, and a indicates the shift value

5. The method according to claim 1, wherein the first TDD cell belongs to a first eNB and the second TDD cell belongs to a second eNB different from the first eNB, and the first and second eNBs are eNBs in an inter-site aggregation applied to the UE.

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 aggregate a first time division duplex (TDD) cell having a first uplink downlink (UD) configuration and a second TDD cell having the first UD configuration, to transmit ACK/NACK information corresponding to the first TDD cell through a first physical uplink control channel, PUCCH in a first UL subframe (SF) on the first TDD cell and to transmit ACK/NACK information corresponding to the second TDD cell through a second PUCCH in a second UL SF on the second TDD cell,

wherein a timing of the first UL SF timing is provided as ACK/NACK transmission timing of a second UD configuration, and a timing of the second UL SF timing is provided as a sum of a shift value and ACK/NACK transmission timing of the second UD configuration,

wherein UL SFs of the second UD configuration are a subset of UL SFs of the first UD configuration,

wherein SF configurations according to UD configurations are as follows,

7. The UE according to claim 6, wherein a DL SF set of the second UD configuration includes a DL SF set according to the first UD configuration and has a larger number of DL SFs than the first UD configuration.

8. The UE according to claim 6, wherein the shift value is determined so that the timing of the first UL SF is not overlapped with the timing of the second UL SF in a time domain.

9. The UE according to claim 6, wherein the ACK/NACK information transmitted in the first subframe #n corresponds to DL SF #n−

k_n of the first TDD cell, and the ACK/NACK information transmitted in the second subframe #m corresponds to DL SF #[m−

(k<sub>m−

a</sub>+a)] of the second TDD cell, wherein k, is a set of k for subframe #i and represents the ACK/NACK transmission timing of the second UD configuration, a indicates the shift value

10. The UE according to claim 6, wherein the first TDD cell belongs to a first eNB and the second TDD cell belongs to a second eNB different from the first eNB, and the first and second eNBs are eNBs in an inter-site aggregation applied to the UE.