IAB Node Timing Configuration for Multi-Link Synchronization
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Solution Overview
Problem
Existing wireless communication systems face challenges in determining accurate transmission timing among nodes in an IAB network, particularly when multiple links are used simultaneously, leading to synchronization issues and misalignment of downlink and uplink transmission timings.
Innovation Solution
The method involves receiving timing configuration information, including parameters such as timing advance, offset, and granularity indications, to determine uplink and downlink transmission timings for IAB nodes, using methods like FDM/SDM to synchronize multiple links, and adjusting timings based on time difference and adjustment parameters to maintain alignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If IAB nodes use multiple links (backhaul and access links) simultaneously for flexible network deployment, then network coverage and deployment flexibility are improved, but transmission timing synchronization deteriorates leading to misalignment between downlink and uplink timings
Solution Approach 1:
The patent applies preliminary action by configuring timing advance parameters (NTA, NTA,offset, granularity indications) in advance before transmission occurs. The second node sends timing configuration information to the first node beforehand, enabling the first node to pre-calculate and adjust its transmission timing to achieve synchronization across multiple links without real-time coordination delays
Solution Approach 2:
The patent implements parameter changes by dynamically adjusting timing advance parameters (NTA values, offsets, and granularity) based on the specific link characteristics and propagation delays. Different NTA parameters are configured for different links (backhaul vs. access links), allowing each link to be optimized independently while maintaining overall network synchronization
2Measurement precision
If timing configuration parameters are configured for each link separately to achieve precise synchronization, then transmission timing alignment is improved, but device complexity increases due to multiple parameters management
Solution Approach 1:
The patent applies universality by designing a unified timing configuration mechanism where a single timing configuration message from the second node contains all necessary parameters (NTA, NTA,offset, granularity) that can be applied across multiple links. This universal configuration approach reduces the need for separate manual configurations for each link while maintaining precise timing alignment
Solution Approach 2:
The patent implements self-service by enabling the first node to autonomously calculate and adjust its transmission timing using the received timing configuration parameters. The first node independently determines the appropriate NTA values for different links based on the provided configuration information, eliminating the need for complex centralized coordination or manual intervention
Data Source
AI summary
A system and method for receiving timing configuration information are disclosed herein. In one embodiment, a method performed by a first node includes receiving, by the first node, timing configuration information, the timing configuration information comprises at least one of a timing advance parameter (NTA), a timing advance offset (NTA,offset), NTA granularity indication information, time difference information at a second node, a timing adjustment parameter (ΔTq). The method includes determining, by the first node, at least one of UL Tx timing or DL Tx timing based on the timing configuration information.