Uplink Timing Configuration for NR IAB Timing Advance Groups
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently managing uplink transmission timings for integrated access and backhaul links in NR networks, leading to latency and interference issues, particularly in millimeter wave spectrum deployments.
Innovation Solution
Proposing a method for configuring different uplink transmission timings for serving cells within the same timing advance group (TAG) to optimize communication efficiency and reduce interference in IAB nodes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single uplink transmission timing is used for all serving cells in the same TAG, then timing synchronization is simplified, but communication efficiency decreases and interference increases in IAB nodes
Solution Approach 1:
The patent divides the TAG into multiple sub-TAGs, where each sub-TAG has its own timing advance group. This segmentation allows different uplink transmission timings to be configured for different serving cells within the same TAG, thereby improving communication efficiency and reducing interference while maintaining manageable timing synchronization through the sub-TAG structure.
2Productivity
If different uplink transmission timings are configured for serving cells in the same TAG, then communication efficiency improves, but timing management complexity increases
Solution Approach 1:
By segmenting the TAG into sub-TAGs, the patent enables different uplink transmission timings for different serving cells while organizing the timing management in a structured hierarchy. The sub-TAG concept provides a systematic framework for managing multiple timing configurations, reducing the overall complexity compared to handling all cells individually without such organization.
Solution Approach 2:
The patent introduces dynamic timing adjustment mechanisms where the network can configure and reconfigure uplink transmission timings flexibly based on channel conditions and traffic requirements. This dynamic approach allows the system to adapt timing configurations optimally without requiring complete reconfiguration of the entire TAG, thereby managing complexity efficiently.
3Ease of manufacture
If traditional timing advance grouping is used, then implementation is straightforward, but latency and interference issues occur in millimeter wave spectrum deployments
Solution Approach 1:
The patent segments the traditional TAG into multiple sub-TAGs, enabling finer-grained timing control for different serving cells. This segmentation allows the system to reduce latency by optimizing uplink transmission timings specifically for millimeter wave spectrum deployments while maintaining a structured implementation approach through the sub-TAG hierarchy, thus balancing implementation ease with performance improvement.
Data Source
AI summary
The present specification provides a method for configuring transmission or reception timing of a wireless device, and a device using the same method. A method for performing uplink transmission by a wireless device in a wireless communication system may comprise a method in which, on the basis that a first serving cell and a second serving cell are included in a particular timing advance group (TAG), and first uplink transmission timing and second uplink transmission timing are different from each other, the uplink transmission is performed on the basis of uplink transmission timing coinciding with reference uplink transmission timing applied to a downlink timing reference cell among the first uplink transmission timing and the second uplink transmission timing.