Beam Sweeping and Tracking Recovery in 5G mmW Systems
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Solution Overview
Problem
Current wireless communication systems, particularly in 5G networks, face challenges in beamforming efficiency due to the need for frequent beam refinement and tracking, especially in millimeter wave (mmW) systems, which results in delays and resource inefficiencies during beam sweeping and recovery processes.
Innovation Solution
The implementation of specific frame structures, sweep sequences, and procedures that assist in beam sweeping, tracking, and recovery, allowing for simultaneous evaluation of multiple beams by both base stations and user equipment, reducing the need for extensive beam scanning and improving adaptive beamforming.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If frequent beam refinement and tracking are performed in mmW systems, then link quality is maintained under changing conditions, but delays and resource consumption increase during beam sweeping and recovery processes
Solution Approach 1:
The patent applies preliminary action by performing beam refinement procedures in advance and maintaining beam tracking information before actual data transmission. The system pre-sweeps beams to establish beam pairs and stores beam management information for quick retrieval, avoiding the need to perform full beam sweeping during recovery scenarios.
Solution Approach 2:
The patent implements dynamics by adapting beam management procedures based on channel conditions and mobility states. The system dynamically adjusts between different beam refinement approaches (full sweeping vs. tracking-based refinement) depending on whether the UE is stationary or mobile, and whether channel conditions are stable or changing.
2Measurement precision
If extensive beam scanning is performed to evaluate multiple beams, then beam selection accuracy is improved, but resource efficiency deteriorates
Solution Approach 1:
The patent applies partial action by performing beam refinement only on a subset of candidate beams rather than exhaustive scanning of all possible beams. The system identifies a limited set of promising beam pairs through initial sweeping and then performs refinement only on these candidates, achieving sufficient accuracy without exhaustive search.
Solution Approach 2:
The patent implements self-service through autonomous beam tracking and recovery mechanisms at the UE side. The UE independently monitors beam quality metrics, detects beam failures, and initiates recovery procedures using stored beam information without requiring network coordination, reducing overall system resource consumption.
3Speed
If beam refinement procedures are simplified to reduce delays, then beam sweeping speed is improved, but beam management accuracy deteriorates
Solution Approach 1:
The patent applies segmentation by dividing beam management into distinct phases: initial beam sweeping to identify candidate beams, beam refinement to improve accuracy on selected candidates, and beam tracking to maintain accuracy over time. Each phase uses appropriate complexity levels, avoiding unnecessary refinement steps while ensuring accuracy where needed.
Data Source
AI summary
Certain aspects of the present disclosure provide various appropriate frame structures, sweep sequences, and procedures that may assist in beam sweeping, tracking and recovery.