IAB Node Timing Difference Parameter TΔ for Wideband Systems
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently managing timing differences in integrated access and backhaul (IAB) systems, particularly in next-generation communication systems using wider frequency bands, which affects signal transmission and reception timing.
Innovation Solution
A method for determining a signal transmission/reception timing in IAB nodes, specifically by calculating the downlink transmission timing by advancing it by a calculated value (X) from the downlink reception timing, where X is determined based on timing advance (TA) and time difference (TΔ) values.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional timing management methods are used in IAB systems, then system compatibility with existing networks is maintained, but communication efficiency deteriorates in next-generation wideband systems
Solution Approach 1:
The patent changes the timing parameter management approach by introducing a new timing difference parameter (TΔ) specifically for IAB nodes in wideband systems. This parameter represents the time difference between when the IAB node receives a signal from its parent node and when it transmits the signal to child nodes. By adjusting this parameter independently, the system achieves accurate timing alignment for wideband operations while maintaining compatibility with existing network architectures.
2Measurement precision
If timing advance values are increased to compensate for propagation delay in wideband systems, then signal reception timing is improved, but transmission timing accuracy deteriorates
Solution Approach 1:
The patent segments the timing management into two independent components: timing advance (TA) for uplink transmission timing adjustment and timing difference (TΔ) for IAB node signal forwarding timing. This segmentation allows TA to be optimized for reception accuracy while TΔ separately compensates for propagation delays in wideband systems, preventing the trade-off between reception accuracy and transmission timing delay.
3Ease of manufacture
If existing timing protocols are used without modification, then implementation complexity is minimized, but signal transmission timing suitability deteriorates for next-generation communication systems
Solution Approach 1:
The patent creates a universal timing management mechanism that serves multiple functions: it maintains compatibility with existing LTE timing protocols while simultaneously supporting NR wideband IAB operations. The TΔ parameter works alongside existing TA mechanisms, allowing the same IAB node to interface with both legacy and next-generation networks using appropriately timed signals.
Data Source
AI summary
A method and a device by which an IAB node sets a time difference in a wireless communication system are provided. The method determines the time difference between MT reception of an IAB node and DU transmission of the IAB node, on the basis of preset parameters that differ in frequency ranges of the IAB node and time difference setting information received from a parent node.