IAB Cell Configuration Using Assistance Information to Avoid PCI Conflicts
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Solution Overview
Problem
In wireless communication systems with mobile Integrated Access and Backhaul (IAB) nodes, there are issues of control signal interference between cells, such as Physical Cell Identifier (PCI) conflicts and Random Access Channel (RACH) conflicts, which affect terminal device access and service operations.
Innovation Solution
A cell configuration method where nodes receive and utilize assistance information to configure cells, selecting appropriate parameters to reduce interference, including configurable cell parameter sets, interference indication, and neighboring cell information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If cells are configured without assistance information in mobile IAB networks, then configuration process is simple, but control signal interference such as PCI conflicts and RACH conflicts occurs between cells
Solution Approach 1:
The patent applies preliminary action by having nodes pre-obtain assistance information about neighboring cells (including PCI, frequency, and other configuration parameters) before configuring their own cells. This advance preparation enables the node to select cell parameters that avoid conflicts with neighbors, thereby preventing PCI conflicts and RACH conflicts while maintaining configuration reliability without requiring complex real-time coordination
Solution Approach 2:
The patent uses assistance information as an intermediary that mediates between different cells in the network. This information acts as a reference that enables nodes to make informed configuration decisions without direct real-time interaction, reducing control signal interference while keeping the configuration process manageable through standardized information exchange
2Reliability
If assistance information is exchanged between nodes to configure cells, then control signal interference is reduced, but information exchange overhead increases
Solution Approach 1:
The patent extracts only the essential assistance information needed for cell configuration (such as PCI, frequency, and key neighboring cell parameters) rather than exchanging complete cell state information. This selective extraction reduces information overhead while still providing sufficient data to avoid PCI conflicts and RACH conflicts, maintaining configuration reliability without excessive signaling
Solution Approach 2:
The patent changes the parameter set being exchanged by focusing on specific cell configuration parameters (PCI, frequency, bandwidth) rather than comprehensive network state information. This parameter optimization reduces the volume of assistance information that needs to be exchanged between nodes while ensuring that the critical parameters needed to prevent interference are included
Data Source
AI summary
A cell configuration method includes: receiving assistance information sent by a second node; and configuring a cell under a first node or the second node according to the assistance information.