IAB Node Downlink Timing Determination
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Time domain synchronization between IAB nodes in multi-hop integrated access and backhaul systems is challenging, affecting communication efficiency in dense wireless communication networks.
Innovation Solution
A method for determining downlink transmission timing of IAB nodes is proposed, enabling time domain synchronization through specific timing alignment mechanisms, such as timing advance calculations and resource configuration, to ensure aligned downlink and uplink transmission timings across nodes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If IAB nodes are deployed in multi-hop integrated access and backhaul systems, then network density and coverage are improved, but time domain synchronization becomes problematic
Solution Approach 1:
The patent applies preliminary action by pre-configuring timing advance values and transmission timing offsets before actual communication occurs. The IAB node receives timing advance information from its parent node in advance, and uses this pre-configured information to adjust its transmission timing proactively, ensuring synchronization is maintained across multi-hop deployments without real-time adjustments.
2Adaptability or versatility
If downlink transmission timing is not properly synchronized, then communication flexibility is improved, but communication efficiency deteriorates
Solution Approach 1:
The patent applies dynamics by making transmission timing adjustable and adaptive rather than fixed. The IAB node dynamically adjusts its downlink transmission timing based on timing advance values and offsets that can be modified through configuration messages from parent nodes, allowing the system to adapt to changing network conditions while maintaining efficiency.
Data Source
AI summary
A downlink transmission timing determination method performed by an integrated access and backhaul (IAB) node comprises: receiving a synchronization offset from a parent node; receiving a parameter related to a timing advance (TA) between an uplink transmission timing and a downlink reception timing; and on the basis of the synchronization offset and the parameter, determining a downlink transmission timing, wherein in comparison with the downlink reception timing, the downlink transmission timing has a time difference corresponding to a value calculated on the basis of the synchronization offset and the parameter.