name: OTDOA
full_form: Observed Time Difference Of Arrival
context: periodic assistance data delivery of new assistance information - Introduction of broadcasting of GNSS and OTDOA positioning assistance information (36.355, 36.331, 36.455) - Support for transfer of assistance information from E-SMLC to eNB to enable eNB to broadcast existing and new GNSS assistance information (36.455) - E-SMLC support for segmentation of broadcast positioning assistance information (36.355) - E-SMLC support for end-to-end encryption of broadcast positioning assistance information (36.355) - Support for distribution of encryption keys from E-SMLC to UE (36.355, 36.331) - UE support for reporting of motion information detected by IMU sensor corresponding to the time when a OTDOA signal measurement is made. Motion information is reported to E-SMCL along with OTDOA signal measurement information (36.355) References [1] RP-172313, "WI UE Positioning Accuracy Enhancements for LTE (LCS_LTE_acc_enh)" [2] RP-180944, "Status Report for WI UE Positioning Accuracy Enhancements
description: Observed Time Difference Of Arrival (OTDOA) is a positioning technology used in LTE networks to enhance the accuracy of user equipment (UE) location. It involves measuring the time difference between signals received from multiple cell towers and using this information to calculate the UE's position.
explanation: OTDOA is specifically designed for determining the location of user equipment within an LTE network, making it a positioning technology. Its function relies on analyzing time differences in signal reception from various cell towers, directly contributing to location accuracy.
section_title: 13.6	UE Positioning Accuracy Enhancements for LTE
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