Positioning reference signal with sub-band-based comb offset
Aspects presented herein may improve UE positioning by providing enhanced resource patterns that may reduce positioning latency and resource overhead for the UE positioning. In one aspect, a transmitter divides a reference signal associated with UE positioning into a plurality of sub-bandwidths, each of the plurality of sub-bandwidths being associated with a comb offset. The transmitter transmits, to a receiver, the reference signal via the plurality of sub-bandwidths. In another aspect, a receiver receives a configuration to measure a reference signal associated with UE positioning. The receiver receives, from a transmitter, the reference signal via a plurality of sub-bandwidths, each of the plurality of sub-bandwidths being associated with a comb offset.
1. An apparatus for wireless communication, comprising:
a memory;
at least one transceiver; and
at least one processor communicatively connected to the memory and the at least one transceiver, the at least one processor configured to:
receive, from a network entity, a configuration for a frequency hopping pattern and a respective comb offset for each of a plurality of sub-bandwidths;
divide a reference signal associated with user equipment (UE) positioning into the plurality of sub-bandwidths based on the configuration, each of the plurality of sub-bandwidths being associated with the respective comb offset; and
transmit the reference signal via the plurality of sub-bandwidths, wherein each of the plurality of sub-bandwidths is transmitted at a different time period based on the frequency hopping pattern.
2. The apparatus of claim 1 , wherein the reference signal is a downlink (DL) positioning reference signal (PRS) or an uplink (UL) sounding reference signal (SRS).
3. The apparatus of claim 1 , where the respective comb offset for each of the plurality of sub-bandwidths is different.
4. The apparatus of claim 1 , wherein the network entity includes at least one of a location server, a location management function (LMF), or a base station.
5. The apparatus of claim 1 , wherein the frequency hopping pattern is based on at least one of time or frequency.
6. The apparatus of claim 1 , wherein the frequency hopping pattern is selected from a set of predefined frequency hopping patterns.
7. The apparatus of claim 1 , wherein to transmit the reference signal, the at least one processor is configured to transmit, to a UE, the reference signal.
8. The apparatus of claim 1 , wherein to transmit the reference signal, the at least one processor is configured to transmit, to a base station, the reference signal.
9. A method of wireless communication, comprising:
receiving, from a network entity, a configuration for a frequency hopping pattern and a respective comb offset for each of a plurality of sub-bandwidths;
dividing a reference signal associated with user equipment (UE) positioning into the plurality of sub-bandwidths based on the configuration, each of the plurality of sub-bandwidths being associated with the respective comb offset; and
transmitting the reference signal via the plurality of sub-bandwidths, wherein each of the plurality of sub-bandwidths is transmitted at a different time period based on the frequency hopping pattern.
10. The method of claim 9 , where the respective comb offset for each of the plurality of sub-bandwidths is different.
11. An apparatus for wireless communication at a receiver, comprising:
a memory;
at least one transceiver; and
at least one processor communicatively connected to the memory and the at least one transceiver, the at least one processor configured to:
receive, from a network entity, an indication of a frequency hopping pattern and a respective comb offset for each of a plurality of sub-bandwidths;
receive a configuration to measure a reference signal associated with user equipment (UE) positioning; and
receive the reference signal via the plurality of sub-bandwidths, each of the plurality of sub-bandwidths being associated with the respective comb offset,
wherein each of the plurality of sub-bandwidths is received at a different time period based on the frequency hopping pattern.
12. The apparatus of claim 11 , wherein the reference signal is a downlink (DL) positioning reference signal (PRS) or an uplink (UL) sounding reference signal (SRS).
13. The apparatus of claim 11 , where the respective comb offset for each of the plurality of sub-bandwidths is different.
14. The apparatus of claim 11 , wherein the network entity includes at least one of a location server, a location management function (LMF), or a base station.
15. The apparatus of claim 11 , wherein the frequency hopping pattern is based on at least one of time or frequency.
16. The apparatus of claim 11 , wherein the frequency hopping pattern is based on a set of predefined frequency hopping patterns.
17. The apparatus of claim 11 , wherein to receive the reference signal, the at least one processor is configured to receive, from a base station, the reference signal.
18. The apparatus of claim 11 , wherein to receive the reference signal, the at least one processor is configured to receive, from a UE, the reference signal.
19. A method of wireless communication, comprising:
receiving, from a network entity, an indication of a frequency hopping pattern and a respective comb offset for each of a plurality of sub-bandwidths;
receiving a configuration to measure a reference signal associated with user equipment (UE) positioning; and
receiving the reference signal via the plurality of sub-bandwidths, each of the plurality of sub-bandwidths being associated with the respective comb offset,
wherein each of the plurality of sub-bandwidths is received at a different time period based on the frequency hopping pattern.
20. The method of claim 19 , where the respective comb offset for each of the plurality of sub-bandwidths is different.