Beam Sweeping Order Control for Interference Mitigation
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Solution Overview
Problem
Current wireless communication systems face challenges in accurately measuring beam reference signals due to interference from neighboring cells, which can lead to incorrect beam selection and reduced throughput, especially when beam sweeping is not optimized for network deployment.
Innovation Solution
The proposed method involves controlling the sweeping order of beams within a cell to minimize interference by alternating transmission between boresight and neighbor zone beams, ensuring that beams in adjacent cells are not transmitted at the same time, and synchronizing beam transmission to reduce noise and interference levels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If beam sweeping is performed simultaneously in adjacent cells, then transmission efficiency is improved, but interference from neighboring cells increases causing measurement inaccuracies
Solution Approach 1:
The patent applies periodic action by implementing time-division multiplexing where beam sweeping in adjacent cells occurs in alternating time slots. Each cell performs beam sweeping periodically rather than simultaneously, creating a structured temporal pattern that eliminates interference while maintaining systematic coverage. This resolves the contradiction by preserving the efficiency of organized beam sweeping while preventing measurement errors caused by simultaneous transmissions.
Solution Approach 2:
The patent implements dynamics by making the beam sweeping order adaptive and configurable based on network conditions. The sweeping sequence can be dynamically adjusted to optimize performance, allowing the system to transition between different transmission patterns. This enables the system to maintain high transmission efficiency while adapting to prevent interference, thereby improving measurement accuracy without sacrificing overall system productivity.
2Measurement precision
If beam sweeping order is optimized to reduce interference, then measurement accuracy is improved, but system complexity increases due to coordination requirements
Solution Approach 1:
The patent applies parameter changes by modifying the temporal parameters of beam sweeping, specifically the time offsets and sweeping orders in adjacent cells. By adjusting these parameters, the system achieves interference-free measurement conditions without requiring complex coordination mechanisms. The configurable nature of these parameters allows for simple implementation while maintaining high measurement accuracy.
3Object-affected harmful factors
If beams in neighbor zone are transmitted at different times, then interference is reduced, but transmission time increases due to sequential transmission
Solution Approach 1:
The patent resolves this contradiction by implementing periodic beam sweeping where neighbor zone beams are transmitted in alternating time slots rather than sequentially. This periodic structure ensures that interference is eliminated while the total transmission time is minimized through efficient time-division multiplexing. The systematic alternation pattern prevents the time loss that would result from purely sequential transmission.
Data Source
AI summary
A method is provided where a set of beams is transmitted from an access point in a first sweeping order in a first cell. The beams transmit a reference signal. A first subset of the beams is configured to be transmitted in a neighbor zone direction of the first cell, within a first common block of time as a second subset of beams being transmitted in a second cell in a neighbor zone direction. Each beam of the first and second subsets of beams are transmitted at different times in the first common block of time.