Beam and Cell Measurement Reporting for Reliable mmWave Handover
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Solution Overview
Problem
In millimeter wave communication systems, the mobility of user equipment (UE) between narrow beams causes significant challenges in maintaining communication quality due to rapid changes in the radio environment, and existing measurement methods are inadequate for handling multi-link connectivity scenarios, leading to complex handover decisions and increased signaling overheads.
Innovation Solution
A measurement reporting method that configures different types of measurement events and thresholds for user equipment (UE) to adapt to high-gain beam coverage, enabling separate reporting of cell and beam measurements, and managing radio resources in ultra-dense networks, thereby reducing complexity and improving handover reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If UE moves between narrow beams in millimeter wave system, then beam coverage and gain are improved, but communication link stability deteriorates due to rapid radio environment changes
Solution Approach 1:
The patent implements dynamic beam management where the network device continuously monitors measurement results from multiple beams and dynamically switches between serving beams based on real-time radio conditions. The UE is configured to measure multiple candidate beams and report measurement results, enabling the network to adaptively select the best beam for maintaining stable communication links despite rapid environment changes.
2Device complexity
If conventional LTE measurement method is used in multi-link connectivity scenario, then measurement process is simplified, but handover decision accuracy deteriorates
Solution Approach 1:
The patent segments the measurement process into distinct types: intra-frequency measurements for same-frequency cells and inter-frequency measurements for different-frequency cells. Each measurement type has dedicated configuration parameters and reporting criteria. The network device configures separate measurement objects, reporting configurations, and evaluation criteria for different measurement types, enabling precise handover decisions while maintaining manageable complexity through structured organization.
3Reliability
If separate reporting of cell and beam measurements is implemented, then handover reliability is improved, but signaling overhead increases
Solution Approach 1:
The patent implements a universal measurement reporting framework where a single measurement reporting mechanism handles both cell-level and beam-level measurements. The measurement configuration includes both cell identity and beam identity, and the reporting structure can convey both cell measurement results and beam measurement results in a unified format. This multi-functional approach enables separate reporting of cell and beam measurements while reducing signaling overhead through consolidated reporting structures and efficient information encoding.
Data Source
AI summary
A measurement reporting method and device, the method including configuring, by a first network device, at least one of first information or second information for user equipment, the first information including a first or second threshold, the first threshold being associated with triggering a first type of measurement event and the second threshold associated with triggering a second type of measurement event, where the second information instructs the user equipment to report a first or second measurement result, the first measurement result being a cell measurement result, and the second measurement result a beam measurement result, delivering, by the first network device, the first or second information to the user equipment, the delivering causing the user equipment to report a measurement result to the first network device in response to a measurement event, and receiving the measurement result sent by the user equipment.