Decoupled positioning reference signal (PRS) measurement window and PRS processing measurement for ultra-reliable low-latency communication (URLLC) and massive machine type communication (MMTC)
Disclosed are techniques for wireless positioning. In an aspect, a user equipment (UE) receives a positioning reference signal (PRS) configuration indicating at least one or more PRS resources of one or more PRS resource sets, buffers a plurality of PRS instances during a plurality of PRS measurement windows, and processes the plurality of PRS instances during one or more PRS processing windows to determine one or more positioning measurements for a positioning session based on the plurality of PRS instances, wherein the one or more PRS processing windows are scheduled after an end of a last PRS measurement window of the plurality of PRS measurement windows, and wherein the one or more PRS processing windows each comprise a period of time during which the UE at least prioritizes PRS processing over reception, processing, or both of other downlink or sidelink signals and channels.
1 . A method of wireless positioning performed by a user equipment (UE), comprising:
receiving a positioning reference signal (PRS) configuration indicating at least one or more PRS resources of one or more PRS resource sets, wherein repetitions of the one or more PRS resources have a common periodicity;
buffering a plurality of PRS instances during a plurality of PRS measurement windows, wherein each PRS instance of the plurality of PRS instances comprises at least one repetition of the one or more PRS resources; and
processing the plurality of PRS instances during one or more PRS processing windows to determine one or more positioning measurements for a positioning session based on the plurality of PRS instances, wherein the one or more PRS processing windows are scheduled after an end of a last PRS measurement window of the plurality of PRS measurement windows, and wherein the one or more PRS processing windows each comprise a period of time during which the UE at least prioritizes PRS processing over reception, processing, or both of other downlink or sidelink signals and channels.
2 . A user equipment (UE), comprising:
a memory;
at least one transceiver; and
at least one processor communicatively coupled to the memory and the at least one transceiver, the at least one processor configured to:
receive, via the at least one transceiver, a positioning reference signal (PRS) configuration indicating at least one or more PRS resources of one or more PRS resource sets, wherein repetitions of the one or more PRS resources have a common periodicity;
buffer a plurality of PRS instances during a plurality of PRS measurement windows, wherein each PRS instance of the plurality of PRS instances comprises at least one repetition of the one or more PRS resources; and
process the plurality of PRS instances during one or more PRS processing windows to determine one or more positioning measurements for a positioning session based on the plurality of PRS instances, wherein the one or more PRS processing windows are scheduled after an end of a last PRS measurement window of the plurality of PRS measurement windows, and wherein the one or more PRS processing windows each comprise a period of time during which the UE at least prioritizes PRS processing over reception, processing, or both of other downlink or sidelink signals and channels.
3 . The UE of claim 2 , wherein the at least one processor is further configured to:
transmit, via the at least one transceiver, uplink data, transmitting sidelink data, receiving downlink data, receiving uplink data, or any combination thereof between the plurality of PRS measurement windows.
4 . The UE of claim 2 , wherein scheduling of the plurality of PRS measurement windows is based on scheduling of the plurality of PRS instances.
5 . The UE of claim 2 , wherein scheduling of the one or more PRS processing windows is based on scheduling of uplink data transmission, sidelink data transmission, downlink data reception, sidelink data reception, or any combination thereof for the UE.
6 . The UE of claim 5 , wherein the one or more PRS processing windows are scheduled during a time period that the UE is not expected to transmit uplink or sidelink data.
7 . The UE of claim 5 , wherein the one or more PRS processing windows are scheduled during a time period that the UE is not expected to receive downlink or sidelink data.
8 . The UE of claim 2 , wherein the one or more PRS processing windows are scheduled after the end of the last PRS measurement window and before a response time for the positioning session.
9 . The UE of claim 8 , wherein the response time is indicated to the UE in assistance data for the positioning session.
10 . The UE of claim 2 , wherein the at least one processor is further configured to:
transmit, via the at least one transceiver, capability information to a location server, the capability information including at least a maximum buffer limit capability indicating a maximum time duration the UE can buffer.
11 . The UE of claim 9 , wherein a period of time from a start of a first PRS measurement window of the plurality of PRS measurement windows to an end of a last PRS measurement window of the plurality of PRS measurement windows is based on the maximum buffer limit capability.
12 . The UE of claim 9 , wherein a period of time from a start of a PRS measurement window of the plurality of PRS measurement windows to an end of the PRS processing window is based on the maximum buffer limit capability.
13 . The UE of claim 2 , wherein:
the one or more PRS processing windows comprise a plurality of PRS processing windows, and
the at least one processor is further configured to:
transmit, via the at least one transceiver, uplink data, receiving downlink data, or both between the plurality of PRS processing windows.
14 . The UE of claim 2 , wherein the at least one processor is further configured to:
transmit, via the at least one transceiver, a request to be configured with the one or more PRS processing windows.
15 . The UE of claim 13 , wherein the request is transmitted to a base station serving the UE via one or more radio resource control (RRC) messages, one or more medium access control control elements (MAC-CEs), or uplink control information.
16 . The UE of claim 13 , wherein the request is transmitted to a location server via one or more Long-Term Evolution (LTE) positioning protocol (LPP) messages.
17 . The UE of claim 2 , wherein the at least one processor is further configured to:
receive, via the at least one transceiver, a configuration of the one or more PRS processing windows.
18 . The UE of claim 16 , wherein the configuration is received from a base station serving the UE via one or more RRC messages, one or more MAC-CEs, or downlink control information.
19 . The UE of claim 16 , wherein the configuration is received from a location server via one or more LPP messages.
20 . A user equipment (UE), comprising:
means for receiving a positioning reference signal (PRS) configuration indicating at least one or more PRS resources of one or more PRS resource sets, wherein repetitions of the one or more PRS resources have a common periodicity;
means for buffering a plurality of PRS instances during a plurality of PRS measurement windows, wherein each PRS instance of the plurality of PRS instances comprises at least one repetition of the one or more PRS resources; and
means for processing the plurality of PRS instances during one or more PRS processing windows to determine one or more positioning measurements for a positioning session based on the plurality of PRS instances, wherein the one or more PRS processing windows are scheduled after an end of a last PRS measurement window of the plurality of PRS measurement windows, and wherein the one or more PRS processing windows each comprise a period of time during which the UE at least prioritizes PRS processing over reception, processing, or both of other downlink or sidelink signals and channels.