Aperiodic and semi-persistent positioning reference signal and measurement gaps
A base station of a network is configured to transmit a first indication to a user equipment (UE) of a mapping of code points, wherein each code point maps to one or more corresponding aperiodic or semi-persistent positioning reference signals (PRS) to be transmitted from one or more transmission and reception points (TRP), transmit a second indication to the UE of a first one of the mapped code points to activate the one or more corresponding PRSs for reception at the UE and transmit the one or more activated PRSs to the UE.
1. A processor of a base station of a network configured to perform operations comprising:
transmitting a first indication to a user equipment (UE) of a mapping of code points, wherein each code point maps to one or more corresponding aperiodic or semi-persistent positioning reference signals (PRS) to be transmitted from one or more transmission and reception points (TRP);
transmitting a group common DCI (GC-DCI) to the UE of a first one of the mapped code points to activate the one or more corresponding aperiodic PRSs for reception at the UE; and
transmitting the one or more activated PRSs to the UE.
2. The processor of claim 1 , wherein each code point further maps each of the PRSs to a corresponding one of the TRPs.
3. The processor of claim 2 , wherein the one or more TRPs are located at the base station.
4. The processor of claim 2 , wherein one or more of the TRPs are located at the base station and one or more of the TRPs are located at one or more neighboring base stations.
5. The processor of claim 1 , wherein the first indication is included in an LTE positioning protocol (LPP) message initiated at a location management function (LMF) of the network.
6. The processor of claim 1 , wherein the first indication is included in a positioning system information block (SIB) (posSIB) broadcast by the base station.
7. The processor of claim 1 , wherein the first indication is included in a radio resource control (RRC) message.
8. The processor of claim 1 , wherein the operations further comprise:
receiving from the UE a report comprising PRS estimations for the transmitted PRSs; and
transmitting the PRS estimations to the network to inform a position determination for the UE.
9. A processor of a base station configured to perform operations comprising:
transmitting an indication to a user equipment (UE) of a code point, wherein the code point maps to one or more corresponding aperiodic or semi-persistent positioning reference signals (PRS) to be transmitted from one or more transmission and reception points (TRP) located at the base station, the indication activating the one or more corresponding DL PRSs for reception at the UE;
transmitting priority rules to the UE, the priority rules indicating to the UE to prioritize DL PRSs over a further DL signal when the DL PRSs are to be received i) outside of a measurement gap, ii) within a DL PRS processing window and iii) within an active bandwidth part (BWP) with a same numerology as the DL PRS; and
transmitting the one or more activated DL PRSs to the UE.
10. The processor of claim 9 , wherein the indication is a downlink control information (DCI) and the PRSs are aperiodic PRSs.
11. The processor of claim 10 , wherein the DCI is a UE-specific DCI.
12. The processor of claim 9 , wherein the indication is a medium access control (MAC) control element (MAC-CE) and the PRSs are semi-persistent PRSs.
13. The processor of claim 10 , wherein the DCI is a group common DCI (GC-DCI).
14. A processor of a user equipment (UE) configured to perform operations comprising:
receiving a first indication from a base station of a mapping of code points, wherein each code point maps to one or more corresponding aperiodic or semi-persistent downlink (DL) positioning reference signals (PRS) to be transmitted from one or more transmission and reception points (TRP);
receiving a second indication from the base station of a first one of the mapped code points to activate the one or more corresponding DL PRSs for reception at the UE;
when DL PRSs are to be received i) outside of a measurement gap, ii) within a DL PRS processing window and iii) within an active bandwidth part (BWP) with a same numerology as the DL PRS, prioritizing the DL PRSs over a further DL signal; and
measuring the one or more activated DL PRSs.
15. The processor of claim 14 , wherein each code point further maps each of the PRSs to a corresponding one of the TRPs.
16. The processor of claim 14 , wherein the operations further comprise:
receiving a third indication from a neighboring base station of a second one of the mapped code points to activate the one or more corresponding PRSs for reception at the UE, wherein the second mapped code point corresponds to PRSs to be transmitted from the neighboring base station.
17. The processor of claim 16 , wherein the third indication is transmitted from a first neighboring TRP located at the neighboring base station, the third indication corresponding to PRSs to be transmitted from the first neighboring TRP, wherein the operations further comprise:
receiving a fourth indication from a second neighboring TRP located at the neighboring base station, the fourth indication corresponding to PRSs to be transmitted from the second neighboring TRP.
18. The processor of claim 14 , wherein the first indication is included in an LTE positioning protocol (LPP) message initiated at a location management function (LMF) of a network.
19. The processor of claim 14 , wherein the first indication is included in a positioning system information block (SIB) (posSIB) broadcast by the base station.
20. The processor of claim 14 , wherein the first indication is included in a radio-resource control (RRC) message.