name: DL-PRS
full_form: Downlink Positioning Reference Signal
context: changes in the 3GPP air interface as well and, similarly to the UE WLAN MAC address based method, it will involve UE-eNB/RNC signalling (which is out of the scope of the current SI). Notice that the PTID would be sent from the UE to the WLAN by re-using the existing EAP-Identity Response message, and therefore seems applicable only for a limited set of authentication mechanisms. On the WLAN side, besides UE behaviour changes, some AP behaviour changes are also required, since the AP would need to be able to read such field (currently the EAP message is transparently forwarded to the AAA). In any case, a more detailed assessment might be needed in the normative phase. The PTID based method would - not affect the current security level of 3GPP RAN and WLAN, neither TMSI nor UE MAC address would be shared out of their original system, and - similarly to the other methods, allow RAN to block unauthorized WLAN access (user manually selecting WLAN). This analysis is summarized in the table
description: The Downlink Positioning Reference Signal (DL-PRS) is a signal transmitted by base stations to help user equipment (UE) calculate its location in a cellular network. UEs receive the DL-PRS and use it, along with time difference of arrival (TDOA) measurements from multiple base stations, to determine their position.
explanation: The description explicitly states that DL-PRS is used for downlink positioning, a technique relying on signal transmission and reception for location determination. This function aligns with the definition of a Channel in telecommunications, which facilitates data transfer and signaling between network elements.
section_title: â	NR-DL-PRS-AssistanceData
biotag_Context: O,O,O,B-Organization,O,O,O,O,O,O,O,O,B-Device,B-Network,B-Protocol,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,B-Parameter,O,O,O,O,O,B-Device,O,O,B-Network,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,B-Network,O,O,B-Device,O,O,O,B-Network Function,O,O,O,O,O,O,O,B-Network Function,O,O,O,O,O,O,O,O,O,O,O,B-Protocol,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,B-Parameter,O,O,O,O,O,O,O,O,O,O,O,B-Organization,B-Network,O,O,O,B-Parameter,O,B-Device,B-Protocol,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,B-Network,O,O,O,B-Network,O,O,O,O,O,O,O,O,O,O,O,O
biotag_Description: O,B-Technology,I-Technology,I-Technology,I-Technology,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,B-Device,O,O,B-Technology,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O