Method for transmitting uplink control information in wireless communication system and apparatus for the same

• US 10,299,255 B2
• Filed: 06/27/2017
• Issued: 05/21/2019
• Est. Priority Date: 06/27/2016
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Hwang, Daesung, Yang, Suckchel
• Primary Examiner(s): Hailu, Kibrom T
• Application Number:
  US15/634,414
• Publication Number:
  US 20170374659A1
• Time in Patent Office: 693 Days
• CPC Class Codes: H04L 1/0606 Space-frequency coding
• CPC Class Codes: H04L 5/0026 Division using four or more dimensions
• CPC Class Codes: H04L 5/0048 Allocation of pilot signals, i.e. of signals known to the receiver
• CPC Class Codes: H04L 5/0053 Allocation of signaling, i.e. of overhead other than pilot signals
• CPC Class Codes: H04W 72/21 in the uplink direction of a wireless link, i.e. towards the network

Abstract

A method for transmitting an uplink control channel from a UE to an eNB in a wireless communication system is disclosed. The method comprises the steps of classifying each of a plurality of resource blocks allocated to a system bandwidth into a plurality of sub-resource blocks; mapping the uplink control channel into a first sub-resource block of a minimum index and a second sub-resource block of a maximum index in accordance with a transmission diversity scheme; and transmitting the uplink control channel to the eNB.

Claims

1. A method for transmitting a physical uplink control channel (PUCCH) by a user equipment (UE) in a wireless communication system, the method comprising:

grouping a plurality of resource blocks (RBs) allocated to a system bandwidth into a plurality of sub-resource blocks (sub-RBs);

mapping the PUCCH to a first sub-RB of a minimum index and a second sub-RB of a maximum index based on a transmission diversity scheme; and

transmitting, to a base station (BS), the PUCCH,

wherein the PUCCH includes uplink control information (UCI) and a demodulation reference signal (DM-RS),

wherein, when the DM-RS is mapped at equal intervals in the first and second sub-RBs, a DM-RS sequence is generated based on a number of resource elements (REs) for mapping the DM-RS in the first and second sub-RBs, and

wherein, when the DM-RS is not mapped at equal intervals in the first and second sub-RBs, the DM-RS sequence is generated based on a total number of REs in the first and second sub-RBs, and a portion of the mapped DM-RS sequence is punctured by the UCI.

2. The method according to claim 1, wherein the sub-RBs include 4 or 6 subcarriers.

3. The method according to claim 1, wherein a maximum transmission power for transmitting the PUCCH is maintained uniformly regardless of a number of the plurality of RBs.

4. The method according to claim 1, wherein the DM-RS sequence includes a first DM-RS sequence for a first antenna port and a second DM-RS sequence for a second antenna port, and

wherein the first sequence and the second sequence are generated based on a different cyclic shift (CS) or a different orthogonal cover code (OCC) to each other.

5. The method according to claim 1,

wherein an UCI sequence includes a first UCI sequence for a first antenna port and a second UCI sequence for a second antenna port, and

wherein the second UCI sequence is generated based on the first UCI sequence.

6. The method according to claim 5, wherein the first UCI sequence is generated based on an orthogonal cover code (OCC) of a predetermined length, and

wherein the second UCI sequence is generated by applying Space Frequency Block Coding (SFBC) to the first UCI sequence in a unit of the predetermined length.

7. A user equipment (UE) for transmitting a physical uplink control channel (PUCCH) in a wireless communication system, the UE comprising:

a transceiver for transmitting and receiving a signal with a base station (BS); and

a processor operatively connected to the transceiver, wherein the processor is configured to;

group a plurality of resource blocks (RBs) allocated to a system bandwidth into a plurality of sub-resource blocks (sub-RBs),

map the PUCCH to a first sub-RB of a minimum index and a second sub-RB of a maximum index based on a transmission diversity scheme; and

control the transceiver to transmit the PUCCH to the BS,

wherein the PUCCH includes uplink control information (UCI) and a demodulation reference signal (DM-RS),

wherein, when the DM-RS is mapped at equal intervals in the first and second sub-RBs, a DM-RS sequence is generated based on a number of resource elements (REs) for the DM-RS in the first and second sub-RBs, and

wherein, when the DM-RS is not mapped at equal intervals in the first and second sub-RBs, the DM-RS sequence is generated based on a total number of REs in the first and second sub-RBs, and a portion of the mapped DM-RS sequence is punctured by the UCI.

8. The UE according to claim 7, wherein the sub-RBs include 4 or 6 subcarriers.

9. The UE according to claim 7, wherein a maximum transmission power for transmitting the PUCCH is maintained uniformly regardless of a number of the plurality of RBs.

10. The UE according to claim 7, wherein the DM-RS sequence includes a first DM-RS sequence for a first antenna port and a second DM-RS sequence for a second antenna port, and

wherein the first sequence and the second sequence are generated based on a different cyclic shift (CS) or a different orthogonal cover code (OCC) to each other.

11. The UE according to claim 7, wherein an UCI sequence includes a first UCI sequence for a first antenna port and a second UCI sequence for a second antenna port, and

wherein the second UCI sequence is generated based on the first UCI sequence.

12. The UE according to claim 11, wherein the first UCI sequence is generated based on an orthogonal cover code (OCC) of a predetermined length, and

wherein the second UCI sequence is generated by applying Space Frequency Block Coding (SFBC) to the first UCI sequence in a unit of the predetermined length.