IAB Link State Timing Adjustment for Synchronized Relay Transmission
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Solution Overview
Problem
In wireless communications systems, the link state of IAB nodes often fails to meet timing requirements, leading to synchronization issues and reduced data transmission efficiency due to interference and delays.
Innovation Solution
A timing adjustment method is implemented using first signaling from a parent node or network-side device to adjust the link state of a relay device or terminal, enabling improved frequency and space division multiplexing and reducing transmission delays.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If IAB nodes operate without timing adjustment, then device complexity is reduced, but timing synchronization is poor causing interference and reduced transmission efficiency
Solution Approach 1:
The patent implements a feedback mechanism where the network device sends timing adjustment indications to the IAB node based on measured timing information. The IAB node adjusts its link state timing based on these feedback signals, creating a closed-loop control system that achieves timing synchronization without requiring complex local timing decision logic.
Solution Approach 2:
The network device acts as an intermediary that centralizes timing management. Instead of each IAB node independently managing its timing (which would increase device complexity), the network device mediates the timing adjustment process by sending timing indications to IAB nodes, thereby achieving synchronization while keeping individual node complexity low.
2Productivity
If timing adjustment is implemented, then data transmission efficiency is improved, but signaling overhead increases
Solution Approach 1:
The timing adjustment indication is integrated into existing uplink grant signaling structures, allowing the same signal to serve both resource allocation and timing adjustment functions. This multi-functionality reduces additional signaling overhead while maintaining the ability to adjust link state timing for improved data transmission efficiency.
3Productivity
If link state timing is not synchronized, then flexibility in link state transitions is maintained, but interference occurs and transmission efficiency decreases
Solution Approach 1:
The patent implements dynamic timing adjustment where the IAB node can flexibly transition between link states (MT TX, MT RX, DU TX, DU RX) while the timing of each state is dynamically adjusted based on network conditions and timing indications from the network device. This maintains adaptability in state transitions while achieving timing synchronization for improved transmission efficiency.
Data Source
AI summary
A timing adjustment method and a related device. The method includes: adjusting timing of a first link state based on first signaling, where the first link state is a link state of a first relay device or a terminal; and the first signaling is provided by a parent node of the first relay device, or a parent node of the terminal, or a first network-side device, where the parent node is a last-hop device of the first relay device or the terminal.