Autonomous Uplink Timing Adjustment in Wireless Networks
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Solution Overview
Problem
Current wireless communication networks face challenges in maintaining accurate time synchronization, particularly in integrated access backhaul networks where mobile nodes and varying link qualities complicate the adjustment of uplink transmission timing relative to downlink reception timing.
Innovation Solution
The implementation of an autonomous time adjustment mode in wireless communication networks, where scheduled entities can autonomously adjust their uplink transmission timing based on changes in downlink reception timing, using a processor and memory to generate and transmit ATA mode information, allowing for independent timing adjustments without continuous TA command signaling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional TA command signaling is used to maintain time synchronization, then time synchronization accuracy is maintained, but signaling overhead increases and system complexity worsens
Solution Approach 1:
The scheduled entity autonomously adjusts its own uplink transmission timing by monitoring downlink reception timing changes and applying compensating adjustments, eliminating the need for continuous network-controlled TA commands. This self-service mechanism reduces signaling overhead while maintaining synchronization accuracy.
Solution Approach 2:
The system implements a feedback loop where the scheduled entity monitors downlink reception timing, detects changes in timing, and automatically adjusts uplink transmission timing based on the observed changes. This closed-loop feedback enables autonomous timing adjustment without requiring continuous network intervention.
2Measurement precision
If frequent TA command updates are transmitted to maintain synchronization in dynamic network conditions, then time synchronization accuracy is improved, but network resources are consumed and productivity decreases
Solution Approach 1:
The scheduled entity independently monitors downlink reception timing and autonomously adjusts its uplink transmission timing without requiring frequent TA command updates from the network. This self-service approach maintains synchronization accuracy while conserving network resources for productive data transmission.
Solution Approach 2:
Instead of continuous TA command signaling, the system transitions to event-driven autonomous adjustment where the scheduled entity periodically monitors timing changes and adjusts only when necessary. This reduces unnecessary signaling in stable conditions while maintaining responsiveness to timing drift.
3Productivity
If autonomous time adjustment is implemented to reduce signaling overhead, then resource utilization improves, but time synchronization precision may worsen
Solution Approach 1:
The autonomous time adjustment mechanism incorporates continuous feedback through downlink reception timing monitoring. The scheduled entity detects timing changes in real-time and applies compensating adjustments to uplink transmission timing, ensuring synchronization accuracy is maintained without requiring network-controlled TA commands.
Solution Approach 2:
The patent replaces the mechanical signaling system (TA command transmission and processing) with an autonomous electronic adjustment mechanism. The scheduled entity uses its own reception timing measurements to directly control transmission timing, substituting network-controlled adjustment with device-level autonomous control.
Data Source
AI summary
Aspects provide for autonomous adjustment of the uplink and downlink transmission timing in wireless communication networks. A radio access network (RAN) entity (e.g., a scheduling entity, such as a base station or parent integrated access backhaul (IAB) node, or a centralized network node, such as an IAB donor node central unit) may provide support to a scheduled entity (e.g., a user equipment (UE) or child IAB node) to operate in an autonomous time adjustment (ATA) mode to autonomously adjust its uplink transmission timing to compensate for the change in downlink reception timing. The RAN entity may generate ATA mode information related to the ATA mode for the scheduled entity and transit the ATA mode information to the scheduled entity.