Timing Adjustment Granularity in Integrated Access Backhaul Networks
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Solution Overview
Problem
Current wireless communication technologies, such as LTE and NR, face challenges in achieving granular timing adjustments and accuracy in integrated access backhaul networks, particularly in multi-hop configurations, where universal approaches can be inefficient and diminish timing adjustment precision due to varying subcarrier spacings and frequency bands.
Innovation Solution
The method involves determining and utilizing granularity and accuracy parameters for timing assistance values, which are specific to each communication link, allowing for precise timing adjustments by nodes within the network, thereby improving communication efficiency in multi-hop integrated access backhaul networks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a universal timing adjustment approach is used in integrated access backhaul networks, then implementation simplicity is improved, but timing adjustment precision deteriorates due to varying subcarrier spacings and frequency bands across different links
Solution Approach 1:
The patent applies local quality by configuring different timing assistance values with specific granularity and accuracy parameters for each communication link based on its unique characteristics (subcarrier spacing, frequency band). Instead of a universal timing adjustment approach, each link receives customized timing parameters tailored to its specific requirements, thereby maintaining timing precision across diverse network conditions while keeping the overall system manageable through standardized configuration procedures.
2Measurement precision
If link-specific granularity and accuracy parameters are configured for timing assistance values, then timing adjustment precision is improved, but system complexity increases due to multiple configuration parameters per link
Solution Approach 1:
The patent utilizes parameter changes by dynamically adjusting timing assistance values with specific granularity and accuracy parameters based on link conditions such as subcarrier spacing and frequency band. The system modifies these timing parameters adaptively to optimize timing synchronization precision for each link while managing complexity through standardized parameter configurations and automated determination methods.
Solution Approach 2:
The patent applies segmentation by dividing the timing configuration into separate, manageable components: timing advance values for uplink synchronization and timing assistance values with granularity/accuracy parameters for downlink timing. This segmentation allows each parameter to be optimized independently for its specific function, improving overall timing precision while maintaining system organization and reducing complexity through modular configuration.
3Measurement precision
If timing assistance values are determined based on multiple factors (subcarrier spacing, frequency band, link characteristics), then timing synchronization accuracy is improved, but information processing requirements increase
Solution Approach 1:
The patent applies preliminary action by determining timing assistance values and their associated granularity and accuracy parameters in advance, before actual communication occurs. The parent node configures these timing parameters based on pre-known link characteristics (subcarrier spacing, frequency band), allowing the child node to apply them directly without real-time calculations. This preliminary configuration reduces information processing requirements during active communication while maintaining high timing synchronization accuracy.
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a node, such as a node in an integrated access backhaul (IAB) deployment, may receive information identifying a timing advance value and a timing assistance value, wherein the timing assistance value is associated with a configuration parameter. The node may perform a downlink transmission to a child node of the node based at least in part on the timing advance value and the timing assistance value and in accordance with the configuration parameter. Numerous other aspects are provided.