5G NR Measurement Gap Timing Advance Mechanism
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Solution Overview
Problem
The application of measurement gap timing advance (MGTA) in 5G NR is unclear, leading to inefficiencies in data transmission and reception before and after the measurement gap, necessitating a clear definition of UE behavior related to MGTA to ensure effective measurement performance.
Innovation Solution
A method for a communication device to receive information about configured measurement gaps, including MG timing advance values, and perform measurements during determined MGs, where the starting time is based on the latest subframe's DL timing, with specific considerations for MG length, repetition period, and subcarrier spacing, ensuring efficient data transmission and reception.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If MG timing advance is applied to advance the measurement gap starting time, then measurement performance is improved, but data transmission and reception efficiency before and after the measurement gap deteriorates due to timing misalignment
Solution Approach 1:
The patent applies dynamic timing adjustment by making the measurement gap starting time flexible rather than fixed. The starting time is determined dynamically based on the latest subframe's DL timing plus MGTA, allowing the system to adapt timing to current conditions while maintaining measurement performance and avoiding data transmission conflicts
Solution Approach 2:
The patent changes the timing parameter by introducing MGTA as an adjustable offset value. By modifying the starting time parameter of the measurement gap based on DL timing and MGTA, the system achieves both improved measurement performance and maintained data transmission efficiency through optimized timing parameters
2Measurement precision
If the measurement gap starting time is advanced by MG timing advance value, then measurement accuracy is improved, but timing alignment with downlink timing is lost causing data transmission issues
Solution Approach 1:
The patent applies preliminary action by determining the measurement gap starting time in advance based on the latest subframe's DL timing. This pre-calculation ensures that the timing advance is properly aligned with downlink timing before data transmission begins, maintaining both measurement accuracy and timing stability
Solution Approach 2:
The patent uses DL timing as an intermediary reference point. By calculating the measurement gap starting time as DL timing plus MGTA, the system maintains a stable relationship with downlink timing while still achieving the timing advance needed for accurate measurements
Data Source
AI summary
There is provided a method for performing measurement, the method performed by a communication device and comprising: receiving information related to configured measurement gap (MG) from a serving cell, wherein the information related to the configured MG includes MG timing advance value; determining a MG based on the information related to the configured MG; and performing the measurement during the determined MG, wherein the determined MG starts at the MG timing advance value advanced to an end of the latest subframe occurring immediately before the configured MG.