Per-Beam Access Restriction for Interference Management
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Solution Overview
Problem
Current relay apparatuses in mobile communication systems lack effective control techniques, making it difficult to efficiently extend coverage while minimizing interference.
Innovation Solution
A communication method that involves forming multiple beams in a cell through beam sweeping and controlling a relay apparatus to relay radio signals between a base station and user equipment, with the base station broadcasting information indicating access restriction on a per beam basis.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If access restriction is applied to the entire cell, then interference is reduced, but coverage area is reduced
Solution Approach 1:
The cell is segmented into multiple beams, and access restriction is applied selectively to specific beams rather than the entire cell. This allows interference to be reduced in affected beams while maintaining coverage in other beams, resolving the contradiction between reducing interference and preserving coverage area.
Solution Approach 2:
Access restriction parameters are configured differently for different beams based on local interference conditions. This local quality approach allows the system to apply restriction only where needed (in beams causing or experiencing interference) while maintaining open access in other beams, thus reducing overall interference without sacrificing total coverage area.
2Area of stationary object
If relay apparatus is deployed to extend coverage, then coverage area is increased, but interference is increased
Solution Approach 1:
The relay apparatus operates on a per-beam basis, where each beam can be independently configured with access restriction parameters. This segmentation allows the system to extend coverage through relay in specific beams while applying access restriction in other beams to prevent interference, thus achieving coverage extension without proportionally increasing interference.
Solution Approach 2:
Different access restriction parameters are applied to different beams based on their specific interference characteristics and coverage needs. This allows the relay apparatus to provide coverage extension in beams where it is beneficial while preventing interference in beams where restriction is necessary, resolving the contradiction between coverage extension and interference generation.
3Measurement precision
If per-beam access restriction is implemented, then interference management precision is improved, but system complexity is increased
Solution Approach 1:
The system divides the cell into multiple beams and configures access restriction parameters for each beam independently. This segmentation enables precise interference management at the beam level while keeping the implementation modular and manageable, reducing the perceived complexity compared to a non-segmented approach.
Solution Approach 2:
The access restriction mechanism serves multiple functions: it provides interference management, coverage control, and relay apparatus coordination all through a unified per-beam parameter configuration system. This multi-functionality reduces overall system complexity by consolidating multiple control functions into a single framework.
Data Source
AI summary
A communication method for use in a mobile communication system includes forming, by a base station, multiple beams in one cell by beam sweeping, and when access restriction is targeted to only some of the multiple beams, broadcasting, by the base station, first information in the some of the multiple beams, the first information indicating that the access restriction is performed on a per beam basis.