Method for transmitting uplink signal in a wireleess communication system and apparatus for the same

• US 20170171865A1
• Filed: 12/08/2016
• Published: 06/15/2017
• Est. Priority Date: 12/08/2015
• Status: Active Application

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Hwang, Seunggye, Chae, Hyukjin, Yi, Yunjung, Kim, Kijun
• Granted Patent: US 10,277,270 B2
• Time in Patent Office: Days
• CPC Class Codes: H04B 1/713 using frequency hopping
• CPC Class Codes: H04L 5/00 Arrangements affording multiple use of the transmission path
• CPC Class Codes: H04L 5/0016 Time-frequency-code

Abstract

Provided are a method of transmitting, by a user equipment, a uplink signal in a wireless communication system. The method includes receiving control information related to a codeword cover used for a multiplexing of a multiple of user equipments from a base station, generating a transmission symbol of a specific length by repeating a data symbol in a specific time unit, generating the uplink signal by applying the codeword cover of the specific length to the generated transmission symbol, and transmitting the generated uplink signal to the base station through a single tone.

Claims

1. A method of transmitting, by a user equipment, a uplink signal in a wireless communication system, the method comprising:

receiving control information related to a codeword cover used for a multiplexing of a multiple of user equipments from a base station;

generating a transmission symbol of a specific length by repeating a data symbol in a specific time unit;

generating the uplink signal by applying the codeword cover of the specific length to the generated transmission symbol; and

transmitting the generated uplink signal to the base station through a single tone.

2. The method of claim 1, wherein the specific time unit is a symbol unit, a symbol group unit, a slot unit, a subframe unit, a subframe group unit, or a wireless frame unit.

3. The method of claim 1, wherein the codeword cover of the specific length is an orthogonal codeword cover which is generated using a DFT (discrete Fourier transform) matrix.

4. The method of claim 3, wherein the codeword cover of the specific length is an orthogonal codeword cover corresponding to a specific row vector of the DFT matrix.

5. The method of claim 4, wherein the row vector of the DFT matrix has indexes of from 0 to {(value of a specific length)−

1}, and the specific row vector is a row vector corresponding to an index close to the value of the specific length or 0.

6. The method of claim 1, wherein the codeword cover has a mapping relation with a coverage class.

7. The method of claim 6, wherein the coverage class is determined using at least one of a distance between the user equipment and the base station, a size of a receiving power in the base station, and a size of an interference influencing an adjacent cell.

8. The method of claim 1, wherein the control information further comprises at least one of frequency hopping information indicating a frequency hopping pattern related to transmission of the uplink signal or information indicating whether the frequency hopping is used.

9. The method of claim 8, wherein the frequency hopping pattern is configured differently per cell.

10. The method of claim 1, wherein the control information is received from the base station through RRC (radio resource control) signaling or DCI (downlink control information).

11. A user equipment for transmitting an uplink signal in a wireless communication, the user equipment comprising:

a radio frequency (RF) unit for transmitting/receiving a wireless signal; and

a processor functionally connected to the RF unit,

wherein the processor is controlled to;

control information related to a codeword cover used for a multiplexing of a multiple of user equipments from a base station;

generate a transmission symbol of a specific length by repeating a data symbol in a specific time unit;

generate the uplink signal by applying the codeword cover of the specific length to the generated transmission symbol; and

transmit the generated uplink signal to the base station through a single tone.