Network Node Beam Selection for Inter-Cell Interference Avoidance
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Solution Overview
Problem
Existing methods for inter-cell interference avoidance in wireless communication networks, such as those using power control, joint transmission/reception, and scheduling coordination, increase signaling overhead and require high capability from radio devices, making them inefficient.
Innovation Solution
A method and apparatus for a network node to select a serving beam for a terminal device based on inter-cell interference information, allowing the network to avoid or reduce inter-cell interference and enhance network throughput through flexible space division multiplexing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If power control, joint transmission/reception, or scheduling coordination is used to avoid inter-cell interference, then interference avoidance is achieved, but signaling overhead increases and device capability requirements increase
Solution Approach 1:
The network node autonomously determines inter-cell interference information and selects serving beams without requiring complex coordination signaling with other cells or high-capability devices. The system serves itself by internally processing interference data to make beam selection decisions, eliminating the need for extensive inter-cell signaling protocols.
Solution Approach 2:
The patent extracts only the essential inter-cell interference information needed for beam selection, rather than transmitting comprehensive coordination data between cells. By taking out only the critical interference parameters, the system achieves interference avoidance without the burden of full joint transmission/reception signaling overhead.
2Measurement precision
If beam management is performed by configuring UE to report measurements on limited favorable beams, then beam alignment is achieved, but inter-cell interference occurs between beams of different cells
Solution Approach 1:
The network node uses feedback from UE measurements on favorable beams and combines it with internally determined inter-cell interference information. This feedback mechanism allows the system to select serving beams that are both well-aligned (based on UE reports) and free from inter-cell interference (based on network-determined interference data).
Solution Approach 2:
The patent applies different quality criteria to different beams by selecting serving beams specifically from candidate beams that have been evaluated for both alignment quality and interference levels. Each beam is assessed locally for its specific interference characteristics rather than applying a uniform approach to all beams.
Data Source
AI summary
Various embodiments of the present disclosure provide a method for interference avoidance. The method which may be performed by a network node comprises selecting a serving beam for a terminal device from candidate beams reported to the network node by the terminal device, based at least in part on inter-cell interference information of the candidate beams. The method may further comprise informing the terminal device of the selected serving beam.