Preconfigured Uplink Transmission Control Through TA Validation
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Solution Overview
Problem
In wireless communication networks, UEs using preconfigured uplink resources (PUR) face challenges in validating the validity of Timing Advance (TA) values during relaxed radio-signal measurements, particularly in idle or low-power states, leading to potential transmission errors due to outdated or inaccurate signal measurements.
Innovation Solution
Wireless devices and network nodes implement a limit on measurement relaxation to ensure accurate TA validation by controlling the interval between radio-signal measurements, ensuring that measurements are made frequently enough to maintain the reliability of TA value validation for PUR transmissions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If measurement relaxation is applied during idle or low-power states, then energy consumption is reduced, but measurement accuracy deteriorates leading to outdated TA values
Solution Approach 1:
The patent implements dynamic measurement intervals that adapt based on UE state and network conditions. When the UE is in connected state with active PUR transmissions, measurements are performed frequently. When transitioning to idle state, measurement relaxation is applied dynamically. This allows the system to optimize energy consumption while maintaining measurement accuracy when needed for TA validation.
Solution Approach 2:
The patent changes the measurement parameter (interval between measurements) based on operational state. By adjusting the measurement interval dynamically - shorter intervals during active PUR transmissions and longer intervals during idle states - the system resolves the contradiction between energy savings and measurement accuracy for TA validation.
2Use of energy by moving object
If measurement interval is increased to save energy, then energy consumption is reduced, but transmission reliability deteriorates due to outdated TA values
Solution Approach 1:
The system dynamically adjusts measurement frequency based on whether the UE is in connected or idle state and whether PUR transmissions are active. This dynamic approach ensures transmission reliability is maintained during active communications while allowing energy savings during idle periods when PUR transmissions are not occurring.
Solution Approach 2:
The patent performs measurements in advance at appropriate intervals before PUR transmissions occur. By maintaining TA validity through periodic measurements even during idle states (at relaxed intervals), the system ensures that when PUR transmissions are needed, reliable TA values are already available, thus maintaining transmission reliability while saving energy.
3Reliability
If TA validation is performed frequently to ensure accuracy, then transmission reliability is improved, but energy consumption increases
Solution Approach 1:
The patent implements dynamic TA validation frequency that adapts to UE state. During connected state with active PUR transmissions, TA validation is performed frequently to ensure transmission reliability. During idle states, validation frequency is reduced, allowing energy savings while maintaining sufficient reliability through periodic validation at relaxed intervals.
Solution Approach 2:
The system changes the validation parameter (frequency of TA checks) based on operational context. By adjusting validation frequency - high during active PUR transmissions and lower during idle states - the system resolves the contradiction between transmission reliability and energy consumption.
4Device complexity
If measurement relaxation is applied in idle state, then device complexity is reduced, but TA value validity deteriorates
Solution Approach 1:
The patent applies dynamic measurement relaxation that is state-dependent. When UE transitions to idle state, measurement complexity is reduced through relaxed intervals. However, the system maintains basic TA validity checks at these relaxed intervals to ensure TA values remain sufficiently valid for potential PUR transmissions, thus balancing complexity reduction with reliability maintenance.
Solution Approach 2:
The system performs preliminary TA validation checks even during idle states with relaxed measurement intervals. By maintaining basic validation functionality during low-power states, the system ensures TA values remain valid enough for PUR transmissions while keeping measurement processing complexity low during idle periods.
Data Source
AI summary
A wireless device (12) “relaxes” the radio-signal measurements it makes with respect to a wireless communication network (10), in the context of using those measurements to determine whether a current Timing Advance, TA, value remains valid for use in transmitting on preconfigured uplink resources, PUR, of the wireless communication network (10). Relaxation refers to the length of the interval between making new measurements. According to techniques herein, the wireless device (12) operates according to an imposed limit on the extent or degree of relaxation, to ensure or at least improve the reliability of the radio measurements with respect to validation of the TA value. Determination of the extent of relaxation occurs at the wireless device (12) or at a supporting network node (22) of the wireless communication network (10).