Using physical channels for positioning measurement signals
Disclosed are techniques for performing positioning operations. In an aspect, a user equipment (UE) receives a downlink physical channel from a base station, the downlink physical channel received via one or more slots of one or more subframes of one or more radio frames, the downlink physical channel carrying user data and/or control information from the base station to the UE, receives, from the base station, an indication that the base station will transmit reference signals for positioning on the downlink physical channel, and performs a positioning measurement of a reference signal received on the downlink physical channel.
1. An apparatus for performing positioning operations, comprising:
a transceiver of a user equipment (UE) configured to:
receive a downlink physical channel from a base station, the downlink physical channel received on one or more slots of one or more subframes of one or more radio frames, the downlink physical channel carrying user data and/or control information from the base station to the UE, the downlink physical channel comprising a physical downlink control channel (PDCCH) or a physical downlink shared channel (PDSCH);
receive, from the base station, an indication in a downlink control information (DCI) scheduling message that the base station will transmit reference signals for positioning via the downlink physical channel; and
perform a positioning measurement of a reference signal received via the downlink physical channel.
2. The apparatus of claim 1 , wherein the UE performs positioning measurements of reference signals received on the downlink physical channel only during a pattern of the one or more slots of the downlink physical channel.
3. The apparatus of claim 2 , wherein the pattern comprises slots within a repeating time window, even slots, or odd slots of the one or more slots.
4. The apparatus of claim 1 , wherein the UE performs positioning measurements of reference signals received on the downlink physical channel received only on predetermined receive beams.
5. The apparatus of claim 1 , wherein the downlink physical channel comprises a multi-layer downlink physical channel, and wherein the indication corresponds to a layer of the downlink physical channel.
6. An apparatus for performing positioning operations, comprising:
a transceiver of a user equipment (UE) configured to:
receive, from a base station, an indication in a downlink control information (DCI) scheduling message that the base station will transmit reference signals for positioning via a downlink physical channel;
receive the downlink physical channel from the base station, the downlink physical channel received via one or more slots of one or more subframes of one or more radio frames, the downlink physical channel carrying user data and/or control information from the base station to the UE, the downlink physical channel comprising a physical downlink control channel (PDCCH) or a physical downlink shared channel (PDSCH);
perform a first set of positioning measurements of the downlink physical channel during a first averaging duration, the first averaging duration comprising a first group of slots of the one or more slots; and
perform a second set of positioning measurements of the downlink physical channel during a second averaging duration, the second averaging duration comprising a second group of slots of the one or more slots; and
at least one processor of the UE configured to:
calculate a first combined positioning measurement for the first set of positioning measurements of the downlink physical channel and a second combined positioning measurement for the second set of positioning measurements of the downlink physical channel; and
cause the transceiver to report the first combined positioning measurement or the second combined positioning measurement to a network entity with which the UE is performing a positioning session.
7. The apparatus of claim 6 , wherein:
the first set of positioning measurements comprises a first positioning measurement of the downlink physical channel and a first positioning measurement of a first positioning reference signal transmitted on the downlink physical channel during the first averaging duration, and
the second set of positioning measurements comprises a second positioning measurement of the downlink physical channel and a second positioning measurement of a second positioning reference signal transmitted on the downlink physical channel during the second averaging duration.
8. The apparatus of claim 6 , wherein:
the first set of positioning measurements comprises positioning measurements of first downlink physical channel signals having a first positioning signal identity, and
the second set of positioning measurements comprises positioning measurements of second downlink physical channel signals having a second positioning signal identity.
9. The apparatus of claim 8 , wherein:
the first downlink physical channel signals have the first positioning signal identity based on being received on a first receive beam of the UE, and
the second downlink physical channel signals have the second positioning signal identity based on being received on a second receive beam of the UE.
10. The apparatus of claim 8 , wherein:
the first downlink physical channel signals have the first positioning signal identity based on being received on a first set of quasi-collocated antenna ports of the UE, and
the second downlink physical channel signals have the second positioning signal identity based on being received on a second set of quasi-collocated antenna ports of the UE.
11. The apparatus of claim 8 , wherein:
the first downlink physical channel signals have the first positioning signal identity based on being a first type of signal, and
the second downlink physical channel signals have the second positioning signal identity based on being a second type of signal.
12. The apparatus of claim 11 , wherein the first type is one of channel state information reference signals (CSI-RS), PDCCH, or PDSCH, and the second type is another one of CSI-RS, PDCCH, or PDSCH.
13. The apparatus of claim 8 , wherein:
the first downlink physical channel signals have the first positioning signal identity based on being within a first bandwidth threshold of the downlink physical channel, and
the second downlink physical channel signals have the second positioning signal identity based on being within a second bandwidth threshold of the downlink physical channel.
14. The apparatus of claim 8 , wherein the first and second positioning signal identities are the same positioning signal identity.
15. The apparatus of claim 8 , wherein the first and second positioning signal identities are different positioning signal identities.
16. The apparatus of claim 6 , wherein the transceiver is further configured to:
receive, from the base station, an indication to activate a downlink physical channel positioning measurement mode.
17. The apparatus of claim 16 , wherein the first group of slots of the first averaging duration begins at the next slot after the indication is received, and wherein the second group of slots of the second averaging duration begins at the next slot after the first group of slots ends.
18. The apparatus of claim 6 , wherein the first and second sets of positioning measurements comprises Time of Arrival (ToA) measurements.
19. A method of performing positioning operations performed by a user equipment (UE), comprising:
receiving a downlink physical channel from a base station, the downlink physical channel received via one or more slots of one or more subframes of one or more radio frames, the downlink physical channel carrying user data and/or control information from the base station to the UE, the downlink physical channel comprising a physical downlink control channel (PDCCH) or a physical downlink shared channel (PDSCH);
receiving, from the base station, an indication in a downlink control information (DCI) scheduling message to activate a downlink physical channel positioning measurement mode; and
performing a positioning measurement of the downlink physical channel based on reception of the indication to activate the downlink physical channel positioning measurement mode.
20. A method for performing positioning operations performed by a user equipment (UE), comprising:
receiving, from a base station, an indication in a downlink control information (DCI) scheduling message that the base station will transmit reference signals for positioning via a downlink physical channel;
receiving the downlink physical channel from the base station, the downlink physical channel received via one or more slots of one or more subframes of one or more radio frames, the downlink physical channel carrying user data and/or control information from the base station to the UE, the downlink physical channel comprising a physical downlink control channel (PDCCH) or a physical downlink shared channel (PDSCH);
performing a first set of positioning measurements of the downlink physical channel during a first averaging duration, the first averaging duration comprising a first group of slots of the one or more slots;
performing a second set of positioning measurements of the downlink physical channel during a second averaging duration, the second averaging duration comprising a second group of slots of the one or more slots;
calculating a first combined positioning measurement for the first set of positioning measurements of the downlink physical channel and a second combined positioning measurement for the second set of positioning measurements of the downlink physical channel; and
reporting the first combined positioning measurement or the second combined positioning measurement to a network entity with which the UE is performing a positioning session.
21. The method of claim 20 , wherein:
the first set of positioning measurements comprises a first positioning measurement of the downlink physical channel and a first positioning measurement of a first positioning reference signal transmitted on the downlink physical channel during the first averaging duration, and
the second set of positioning measurements comprises a second positioning measurement of the downlink physical channel and a second positioning measurement of a second positioning reference signal transmitted on the downlink physical channel during the second averaging duration.
22. The method of claim 20 , wherein:
the first set of positioning measurements comprises positioning measurements of first downlink physical channel signals having a first positioning signal identity, and
the second set of positioning measurements comprises positioning measurements of second downlink physical channel signals having a second positioning signal identity.
23. The method of claim 22 , wherein:
the first downlink physical channel signals have the first positioning signal identity based on being received on a first receive beam of the UE, and
the second downlink physical channel signals have the second positioning signal identity based on being received on a second receive beam of the UE.
24. The method of claim 22 , wherein:
the first downlink physical channel signals have the first positioning signal identity based on being received on a first set of quasi-collocated antenna ports of the UE, and
the second downlink physical channel signals have the second positioning signal identity based on being received on a second set of quasi-collocated antenna ports of the UE.
25. The method of claim 22 , wherein:
the first downlink physical channel signals have the first positioning signal identity based on being a first type of signal, and
the second downlink physical channel signals have the second positioning signal identity based on being a second type of signal.