name: TTFF
full_form: Time To First Fix
context: The V2V sidelink channel is modeled according to the following three states: - LOS: - A V2V link is in LOS state if the two vehicles are in the same street and the LOS path is not blocked by vehicles. - NLOS: LOS path blocked by buildings - A V2V link is in NLOS state if the two vehicles are in different streets. - NLOSv: LOS path blocked by vehicles - A V2V link is in NLOSv state if the two vehicles are in the same street and the LOS path is blocked by vehicles. A link between two vehicles in the same street is either in LOS state or NLOSv state. The probability of LOS and NLOSv is given by Table 6.2-1. Baseline is the state is not updated between LOS and NLOSv, and evaluation with state update between LOS and NLOSv is not precluded. Table 6.2-1: Probability of LOS and NLOSv states (d denotes the distance between transmit and receive UEs). Vehicle UE location is updated every 100 ms. State transition between LOS/NLOSv and NLOS is checked for each link at each location update during
description: Time To First Fix (TTFF) is a measurement of the time it takes for a User Equipment (UE) to achieve its first position fix after being powered on or reset. It is an important performance metric in cellular networks, particularly in relation to location-based services and emergency calls.
explanation: The text explicitly states that TTFF is a 'measurement' of the time taken for a UE to obtain its first position fix.
section_title: B.1.10	RESET UE POSITIONING STORED INFORMATION Message
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