Sidelink angular-based and sl rrm-based positioning

Abstract

An apparatus for localizing a target user equipment (“UE”) sidelink (“SL”) positioning includes a processor configured to cause the target UE to receive from a sidelink configuration source SL positioning reference signals (“SL PRS”) assistance data associated with SL reference signal transmissions e.g., beam transmissions, transmitted from one or more SL signal transmitting devices. The target UE receives transmitted SL signal information from the one or more SL signal transmitting devices and performs SL signal angle of arrival (“AoA”) measurements or SL reference signal received power (“SL RSRP”) measurements for deriving angle of departure (“AoD”) mapped to the received SL RSRP measurements or performs SL radio resource management measurements (“SL-RMM”) for determining an estimated location of the target UE using SL-AoD, SL-AoA, SL-RMM positioning techniques or combinations thereof.

1 . A user equipment (“UE”) apparatus comprising:
 a processor; and 
 a memory coupled to the processor, the memory comprising instructions executable by the processor to cause the UE apparatus to: 
 receive from a sidelink configuration source a plurality of sidelink (“SL”) positioning reference signal (“PRS”) assistance data associated with a plurality of SL signal transmissions that serve as reference signal transmissions and are selected from beam transmissions, antenna panel transmissions, or a combination thereof, transmitted from one or more SL signal transmitting devices; 
 receive the SL reference signal transmissions from the one or more SL signal transmitting devices; and 
 perform SL signal angle of arrival (“AoA”) measurements of the received SL reference signal transmissions or perform SL reference signal reference signal received power (“RSRP”) measurements for deriving angle of departure (“AoD”) calculations mapped to the received SL RSRP measurements for determining an estimated location of the UE apparatus using SL AoD positioning techniques, SL AoA positioning techniques, or a combination thereof. 
 
     
     
         2 . The UE apparatus of  claim 1 , wherein:
 the sidelink configuration source is selected from a Roadside Unit (“RSU”), a Location Management Function (“LMF”), or a UE other than the UE apparatus;   the one or more sidelink transmitting devices are selected from RSUs and UEs other than the UE apparatus, wherein:   in response to being configured for UE-based SL angular-based positioning, the instructions are further executable by the processor to cause the UE apparatus to determine its estimated location based on the configured SL AoA measurements and/or the derived SL AoD calculations mapped to the SL RSRP measurements; and   in response to being configured for UE-assisted SL angular-based positioning, the instructions are further executable by the processor to cause the UE apparatus to report the SL AoA measurements and/or the SL RSRP measurements to an LMF.   
     
     
         3 . The UE apparatus of  claim 1 , wherein the received SL signal transmissions comprise SL signals selected from SL synchronization signals (“SLSS”), SL channel-state information reference signals (“SL CSI-RS”), SL PRS, or a combination thereof. 
     
     
         4 . The UE apparatus of  claim 2 , wherein the UE apparatus is configured with a set of identifiers (“IDs”) selected from: RSU identifier (“ID”), Source UE-ID, Destination UE-ID; Zone ID; SL transmission reception point (“TRP”) ID; SL PRS ID; or a combination thereof configured to uniquely identify SL reference signal resources to be measured and/or reported by the UE apparatus. 
     
     
         5 . The UE apparatus of  claim 2 , wherein the estimated location of the UE apparatus is based on the derived AoD calculations using further spatial direction information selected from azimuth, elevation, zenith, or a combination thereof, corresponding to the received SL signal transmissions. 
     
     
         6 . The UE apparatus of  claim 1 , wherein the estimated location of the UE apparatus is determined for a configured SL AoA based positioning technique using measured phase differences of the SL signal transmissions received at a plurality of receive antenna elements of the UE apparatus. 
     
     
         7 . The UE apparatus of  claim 1 , wherein the SL signal transmissions received by the UE apparatus are configured and measured at a plurality of time instances corresponding to points along a trajectory of the UE apparatus. 
     
     
         8 . The UE apparatus of  claim 1 , wherein in response to being configured for UE-assisted angular-based positioning, the UE apparatus reports to a location management function (“LMF”), an SL beam index corresponding to a plurality of SL-PRS resource sets. 
     
     
         9 . A user equipment (“UE”) apparatus comprising:
 a processor; and 
 a memory coupled to the processor, the memory comprising instructions executable by the processor to cause the UE apparatus to: 
 perform one or more sidelink (“SL”) radio resource management (“RRM”) measurements selected from measurements of: physical sidelink broadcast channel (“PSBCH”) reference signal received power (“RSRP”), physical sidelink shared channel (“PSSCH”) RSRP, physical sidelink control channel (“PSCCH”) RSRP, SL channel-state reference signals (“CSI-RS”), SL synchronization signals (“SLSS”), or a combination thereof; and 
 in response to being configured for UE-based SL range-based positioning, determine its estimated location based on the selected RRM measurements; and 
 in response to being configured for UE-assisted SL range-based positioning, report the selected RRM measurements to a location management function (“LMF”) configured to estimate the location of the UE apparatus based on the reported RRM measurements. 
 
     
     
         10 . The UE apparatus according to  claim 9 , wherein the UE apparatus differentiates the selected RRM measurements based on identification selected from Roadside Unit (“RSU”) Identifier (“ID”), source UE ID, destination UE ID, or a combination thereof. 
     
     
         11 . The UE apparatus of  claim 10 , wherein granularity of the estimated location calculation of the UE apparatus is enhanced by using a zone ID corresponding to the UE apparatus at receipt of the SL reference signal transmissions. 
     
     
         12 . The UE apparatus of  claim 9 , wherein the instructions are further executable by the processor to cause the UE apparatus to perform one or more of the following actions:
 receive a request from the sidelink configuration source to provide capability information related to the SL angle of departure (“AoD”) and/or SL angle of arrival (“AOA”) positioning and in response, transmitting the requested capability information related to the SL AoD, and or SL AoA, angular-based positioning to the sidelink configuration source; and   transmit to the sidelink configuration source a request for assistance data information related to the SL AoD and/or SL AoA positioning and receiving the requested assistance data information related to the SL AoD, and or SL AoA, angular-based positioning from the sidelink configuration source.   
     
     
         13 . The UE apparatus of  claim 9 , wherein the instructions are further executable by the processor to cause the UE apparatus to perform one or more of the following actions:
 receive a request from the sidelink configuration source to provide capability information related to the SL RRM range-based positioning and in response, transmitting the requested capability information related to the SL RRM-based positioning to the sidelink configuration source; and   transmit to the sidelink configuration source a request for assistance data information related to the SL RRM range-based positioning and receiving the requested assistance data information related to the SL RRM range-based positioning from the sidelink configuration source.   
     
     
         14 . A method for sidelink based positioning of a target user equipment (“UE”) in a communication network, the method selected from a first set of sidelink (“SL”) angular-based positioning techniques selected from SL angle of arrival (“AOA”) positioning, SL angle of departure (“AoD”) positioning, or combinations thereof, and a second set of sidelink positioning techniques based on SL-Radio Resource Management (“SL RRM”) measurements, wherein:
 the first sidelink positioning technique that is SL angular-based comprises: 
 receiving a plurality of SL positioning reference signals (“SL PRS”) assistance data associated with a plurality of SL signal transmissions that serve as reference signal transmissions and are selected from beam transmissions, and antenna panel transmissions, or combinations thereof, transmitted from one or more SL signal transmitting devices; 
 receiving the SL reference signal transmissions from the one or more SL signal transmitting devices; 
 performing configured measurements selected from:
 SL AoA measurements of the received SL reference signal transmissions for determining an estimated location of the target UE using SL AoA positioning techniques; 
 SL reference signal received power (“RSRP”) measurements for deriving AoD calculations mapped to the received SL reference signal transmissions for determining the estimated location of the target UE using SL AoD positioning techniques; 
 or a combination thereof. 
 
 
     
     
         15 . The method of  claim 14 , wherein the second sidelink positioning technique that is SL RRM-based comprises:
 performing one or more sidelink (“SL”) radio resource management (“RRM”) measurement selected from measurements of: physical sidelink broadcast channel (“PSBCH”) reference signal received power (“RSRP”), physical sidelink shared channel (“PSSCH”) RSPR, physical sidelink control channel (“PSCCH”) RSRP, SL channel-state reference signals (“CSI-RS”), SL synchronization signals (“SLSS”), or a combination thereof; and   determining the estimated location of the target UE based on the selected RRM measurements.   
     
     
         16 . The method of  claim 15 , wherein the target UE differentiates the selected RRM measurements based on identification selected from roadside unit (“RSU”) identifier (“ID”), source UE ID, destination UE ID, or a combination thereof. 
     
     
         17 . The method of  claim 14 , wherein the received SL signal transmissions comprise SL signals selected from SL synchronization signals (“SLSS”), SL channel-state information reference signals (“SL CSI-RS”), SL PRS, or a combination thereof. 
     
     
         18 . The method of  claim 14 ,
 wherein the estimated location of the target UE is based on the derived AoD calculations using further spatial direction information selected from azimuth, elevation, zenith, or a combination thereof, corresponding to the received SL signal transmissions; and   wherein the estimated location of the target UE is determined for a configured SL AoA based positioning technique using measured phase differences of the SL signal transmissions received at a plurality of receive antenna elements of the target UE.   
     
     
         19 . The method of  claim 14 , wherein the SL signal transmissions received by the target UE are configured and measured at a plurality of time instances corresponding to points along a trajectory of the target UE. 
     
     
         20 . The method of  claim 14 , wherein in response to being configured for UE-assisted angular-based positioning, the target UE reports to a Location Management Function (“LMF”), an SL beam index corresponding to a plurality of SL-PRS resource sets.