Dynamic Timing Advance Adjustment for Wireless Uplink Efficiency
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Solution Overview
Problem
Current wireless communication systems face inefficiencies in timing advance (TA) adjustments, particularly in dynamic scenarios where UE mobility and environmental changes require adaptive TA settings, often leading to unnecessary power consumption and signaling overhead due to static or semi-static power adjustment configurations.
Innovation Solution
Implementing dynamic timing advance adjustment schemes where user equipment (UE) can autonomously or upon command from the base station adjust TA values based on capability, mobility mode, and environmental conditions, selecting from a set of TA adjustment schemes to optimize uplink transmissions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If static or semi-static power adjustment configurations are used, then device complexity is reduced, but power consumption increases due to unnecessary TA adjustments
Solution Approach 1:
The patent implements dynamic TA adjustment schemes where the UE autonomously adjusts TA values based on real-time conditions such as mobility state and signal quality, transitioning from static to dynamic configuration. This allows the system to adapt TA adjustments to actual channel conditions, reducing unnecessary adjustments and thereby reducing power consumption while maintaining manageable device complexity through standardized adjustment rules.
2Use of energy by moving object
If dynamic TA adjustment schemes are implemented, then power consumption is reduced, but device complexity increases
Solution Approach 1:
The patent changes the parameter of TA adjustment from static to dynamic by introducing mobility-state-dependent adjustment rules. The UE determines its mobility state based on reference signal received power (RSRP) measurements and applies different TA adjustment strategies for different mobility states (e.g., stationary, slow-moving, fast-moving). This parameter-based approach reduces power consumption by avoiding unnecessary adjustments while keeping device complexity manageable through standardized parameter thresholds and adjustment rules.
3Loss of information
If autonomous TA adjustment is enabled, then signaling overhead is reduced, but reliability decreases due to potential timing conflicts
Solution Approach 1:
The patent implements feedback mechanisms where the UE monitors for TA adjustment commands from the base station and resolves conflicts between autonomous adjustments and network commands. When a TA command is received, the UE prioritizes the network command and adjusts its autonomous adjustment behavior accordingly. This feedback loop ensures reliability by maintaining network control while still benefiting from reduced signaling overhead through autonomous adjustments during periods without conflicts.
4Adaptability or versatility
If multiple TA adjustment schemes are supported, then adaptability improves, but device complexity increases
Solution Approach 1:
The patent applies local quality by implementing different TA adjustment schemes tailored to specific mobility states and service types. Instead of supporting multiple complex schemes simultaneously, the UE determines its current mobility state and service type, then applies the appropriate adjustment scheme for that specific condition. This localized approach provides adaptability across different scenarios while keeping device complexity manageable by avoiding the need to manage multiple schemes concurrently.
Data Source
AI summary
Methods, systems, and devices for wireless communications are described. A user equipment (UE) may transmit a capability or mobility mode indication to a base station. The base station may select a timing advance (TA) adjustment scheme based on the information included in the indication. The base station may select a TA adjustment scheme in which the UE autonomously adjusts a TA value; the UE adjusts the TA value after receiving a command from the base station; or the UE transmits a message to the base station including a proposed TA adjustment, and the UE adjusts the TA value after receiving an approval message from the base station. The base station may transmit a TA adjustment scheme configuration to the UE including an indication of the selected TA adjustment scheme. The UE may adjust a TA value for an uplink transmission based on applying the TA adjustment scheme.