Method for transmitting positioning information by terminal in wireless communication system supporting sidelink, and device therefor
Disclosed are a method for a terminal transmitting positioning information in a wireless communication system supporting sidelink and a device therefor according to various embodiments. Disclosed are a method for a terminal transmitting positioning information and a device therefor, the method comprising the steps of: receiving, from a network or a transmission terminal, a positioning signal comprising N consecutive tones to which reference signals are mapped; measuring the phase difference between a reference signal, which is mapped to an anchor tone which is a reference among the N consecutive tones, and the reference signals respectively mapped to the remaining tones; and transmitting, to the network or the transmission terminal, positioning information comprising information relating to the measured phase difference, wherein the positioning information comprises information relating to the sum of the measured phase differences between the reference signals.
1. A method performed by a user equipment (UE) in a wireless communication system supporting sidelink, the method comprising:
receiving, from a network or a transmitting UE, a positioning signal including N consecutive tones to which reference signals are mapped (where N is an integer);
measuring phase differences between a reference signal mapped to an anchor tone among the N consecutive tones and reference signals respectively mapped to remaining tones, wherein the anchor tone corresponds to a standard tone; and
transmitting positioning information including information regarding the measured phase differences to the network or the transmitting UE,
wherein the positioning information includes information regarding a sum of the measured phase differences between the reference signals.
2. The method of claim 1 , wherein any one of the N consecutive tones is determined as the anchor tone based on selectivity of a channel carrying the positioning signal.
3. The method of claim 1 , wherein either a first tone or an N-th tone among the N consecutive tones is determined as the anchor tone.
4. The method of claim 1 , wherein an N/2-th tone among the N consecutive tones is determined as the anchor tone.
5. The method of claim 1 , wherein the anchor tone is predetermined by a base station or the transmitting UE based on selectivity of a channel carrying the positioning signal.
6. The method of claim 1 , wherein the information regarding the sum of the measured phase differences between the reference signals corresponds to information regarding a phase difference between reference signals mapped to two tones with a virtual frequency interval, and
wherein the virtual frequency interval is greater than a maximum frequency difference between the N tones.
7. The method of claim 1 , wherein the positioning information includes information regarding a sum of absolute values of the measured phase differences between the reference signals.
8. The method of claim 1 , wherein the UE selects M consecutive tones from among the N consecutive tones included in the positioning signal, and wherein M is an integer less than N.
9. The method of claim 8 , wherein the UE determines the anchor tone from among the M consecutive tones based on selectivity of a channel carrying the positioning information, and wherein the positioning information further includes information regarding a value of M and the determined anchor tone.
10. A method performed by a network in a wireless communication system supporting sidelink, the method comprising:
mapping reference signals to N consecutive tones (where N is an integer), respectively;
transmitting, to a user equipment (UE), a positioning signal including the N consecutive tones; and
receiving positioning information including information regarding phase differences between a reference signal mapped to an anchor tone corresponding to a standard tone among the N consecutive tones and reference signals respectively mapped to remaining tones, wherein the phase differences are measured by the UE,
wherein the positioning information includes information regarding a sum of the measured phase differences between the reference signals.
11. The method of claim 10 , wherein the reference signals mapped to the N consecutive tones have same phase information.
12. The method of claim 10 , wherein a sum of phases of the reference signals mapped to the N consecutive tones is predetermined.
13. The method of claim 10 , wherein the positioning signal is transmitted by allocating highest transmit power to the anchor tone among the N consecutive tones.
14. The method of claim 10 , wherein the positioning signal is transmitted by allocating highest transmit power to a first tone and an N-th tone among the N consecutive tones.
15. A device operating in a wireless communication system supporting sidelink, the device comprising:
a processor; and
a memory connected to the processor,
wherein the processor is configured to:
receive, from the memory, information regarding a positioning signal including N consecutive tones to which reference signals are mapped (wherein N is an integer), wherein the positioning signal is received from a network or a transmitting UE;
measure phase differences between a reference signal mapped to an anchor tone corresponding to a standard tone among the N consecutive tones and reference signals respectively mapped to remaining tones; and
generate the positioning information including information regarding the measured phase differences, and
wherein the positioning information includes information regarding a sum of the measured phase differences between the reference signals.
16. The device of claim 15 , wherein the processor is configured to receive a user input to switch a drive mode from an autonomous mode to a manual mode, or to switch from a manual mode to an autonomous mode.