Method for transmitting uplink signal in a wireless communication system and apparatus for the same
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.
1. A method of transmitting an uplink (UL) signal in a wireless communication system, the method performed by a user equipment (UE) and comprising:
receiving control information from a base station (BS), the control information related to a codeword cover used for a multiplexing multiple UEs;
generating a transmission symbol by repeating a data symbol in a specific time unit;
generating the UL signal by applying the codeword cover to the generated transmission symbol; and
transmitting the generated UL signal to the BS through a single tone,
wherein the codeword cover is an orthogonal codeword cover corresponding to a specific row vector of a discrete Fourier transform (DFT) matrix,
wherein the specific row vector has indexes of from 0 to {(value of a specific length)−1}, and
wherein the specific row vector corresponds to an index close to the value of the specific length or 0.
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 has a mapping relation with a coverage class; and
the coverage class corresponds to one or more areas generated by classifying a range covered by a cell.
4. The method of claim 3 , wherein the coverage class is determined using at least a distance between the UE and the BS, a size of a receiving power of the BS, or a size of an interference influencing an adjacent cell.
5. The method of claim 1 , wherein the control information comprises at least frequency hopping information indicating a frequency hopping pattern related to transmission of the UL signal or information indicating whether frequency hopping is used.
6. The method of claim 5 , wherein the frequency hopping pattern is configured differently per cell.
7. The method of claim 1 , wherein the control information is received through Radio Resource Control signaling or Downlink Control Information.
8. A user equipment (UE) for transmitting an uplink signal in a wireless communication, the UE comprising:
a radio frequency (RF) unit for transmitting and receiving a wireless signal; and
a processor functionally connected to the RF unit for:
controlling the RF unit to receive control information from a base station (BS), the control information related to a codeword cover used for multiplexing multiple UEs;
generating a transmission symbol by repeating a data symbol in a specific time unit;
generate the UL signal by applying the codeword cover to the generated transmission symbol; and
controlling the RF unit to transmit the generated uplink signal to the BS through a single tone,
wherein the codeword cover is an orthogonal codeword cover corresponding to a specific row vector of a discrete Fourier transform (DFT) matrix,
wherein the specific row vector has indexes of from 0 to {(value of a specific length)−1}, and
wherein the specific row vector corresponds to an index close to the value of the specific length or 0.
9. The UE of claim 8 , 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.
10. The UE of claim 8 , wherein:
the codeword cover has a mapping relation with a coverage class; and
the coverage class corresponds to one or more areas generated by classifying a range covered by a cell.
11. The UE of claim 10 , wherein the coverage class is determined using at least a distance between the UE and the BS, a size of a receiving power of the BS, or a size of an interference influencing an adjacent cell.
12. The UE of claim 8 , wherein the control information comprises at least frequency hopping information indicating a frequency hopping pattern related to transmission of the UL signal or information indicating whether frequency hopping is used.
13. The UE of claim 12 , wherein the frequency hopping pattern is configured differently per cell.
14. The UE of claim 8 , wherein the control information is received through Radio Resource Control signaling or Downlink Control Information.