IAB Node Synchronization Beam Signaling Overhead Reduction
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Solution Overview
Problem
In wireless communication networks, especially in 5G radio access technologies, Integrated Access and Backhaul (IAB) nodes face challenges in managing resources and timing due to shared time/frequency resources, particularly in scenarios where land-bound connections are not feasible, requiring new approaches for efficient operation, especially for downlink timing in child IAB nodes.
Innovation Solution
The method involves scheduling beam sweeping with synchronization beams that carry information signaling to replace synchronization signaling, allowing for efficient use of resources by reducing redundant signaling, and adapting to stable communication links between IAB nodes, which are not highly mobile.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If beam sweeping with synchronisation beams is performed to provide synchronisation signaling, then synchronisation reliability is improved, but signaling overhead and resource consumption increase
Solution Approach 1:
The patent combines the synchronisation signaling function with the existing signaling beam by making the signaling beam carry replacement information that replaces synchronisation signaling. This merging eliminates the need for separate synchronisation beams, reducing signaling overhead while maintaining synchronisation reliability through the shared beam structure.
Solution Approach 2:
The signaling beam is designed to serve multiple functions: it carries both replacement information for downlink timing and, when needed, synchronisation signaling. This multi-functionality allows the same beam resource to fulfill different purposes, reducing the total number of beams required and minimizing resource consumption.
2Area of stationary object
If separate synchronisation beams are used for beam sweeping, then synchronisation coverage is improved, but device complexity and resource management difficulty increase
Solution Approach 1:
The patent merges the synchronisation beam with the signaling beam, so that a single beam structure handles both signaling and synchronisation functions. This reduces the number of separate beams that need to be managed, simplifying the beam sweeping process and reducing device complexity while maintaining comprehensive coverage.
Solution Approach 2:
The signaling beam is designed as a universal beam that can carry both replacement information and synchronisation signaling. This multi-functionality eliminates the need for separate dedicated beams for each function, reducing the overall beam management complexity while maintaining full synchronisation coverage.
3Productivity
If replacement information is carried on the signaling beam, then resource efficiency is improved, but timing management complexity increases
Solution Approach 1:
The patent employs feedback mechanisms where the receiving node provides timing advance information back to the transmitting node. This feedback loop enables the receiving node to adjust its timing based on actual reception conditions, simplifying the timing management complexity while maintaining high resource efficiency through the replacement information mechanism.
Solution Approach 2:
The patent uses parameter changes in the form of timing advance adjustments and downlink timing indications to manage timing differences. By dynamically adjusting these parameters based on feedback and operational conditions, the system maintains resource efficiency while managing timing complexity through standardized parameter modifications rather than complex timing algorithms.
Data Source
AI summary
There is disclosed a method of operating an Integrated Access and Backhaul (IAB) node (200, C, N3) in a wireless communication network, the IAB node being in a communication link with a second IAB node using a signaling beam, the IAB node further being scheduled to perform beam sweeping with a plurality of synchronisation beams, one of the synchronisation beams corresponding to the signaling beam; wherein a synchronisation beam is scheduled to carry synchronisation signaling; and wherein the method comprises performing beam sweeping such that the synchronisation beam corresponding to the signaling beam carries information signaling replacing the synchronisation signaling at least in part. The disclosure also pertains to related methods and devices.