User Equipment Beam Change Reporting for 5G Mobility
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Solution Overview
Problem
Current wireless communication systems face inefficiencies in mobility management due to the use of cell-specific reference signals, leading to resource wastage and inaccurate event triggers, especially in systems employing beams for communication, such as 5G networks.
Innovation Solution
Implementing beam sets with specific mobility parameters for each set, allowing UEs to detect and report mobility events more accurately, reducing power consumption and signaling overhead by using these parameters for mobility management decisions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If cell-specific reference signals are used for mobility management, then coverage area is improved, but measurement precision deteriorates leading to inaccurate event triggers
Solution Approach 1:
The patent segments the reference signal resources by creating beam-specific reference signals (CSI-RS) for different beam sets instead of using a single cell-specific reference signal. This allows UEs to measure and report mobility events accurately for each beam set independently, resolving the contradiction between maintaining wide coverage and achieving precise event trigger detection.
2Measurement precision
If beam sets with specific mobility parameters are implemented, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The patent implements dynamic mobility parameters that can be independently configured for different beam sets, allowing the system to adapt measurement thresholds and criteria based on specific beam characteristics. This dynamic approach maintains high measurement precision while managing complexity through flexible, context-dependent parameter configuration rather than static complex structures.
Solution Approach 2:
The patent changes the parameter structure by introducing beam-specific mobility parameters (such as beam set-specific thresholds and offsets) that differ from traditional cell-specific parameters. This parameter transformation enables precise event triggering for each beam set while keeping the overall system manageable through standardized parameter configurations that can be applied across multiple beams.
3Device complexity
If traditional cell-specific reference signals are used, then device complexity is kept low, but power consumption increases due to continuous monitoring
Solution Approach 1:
The patent implements periodic beam set indication reporting where UEs report mobility events only when specific beam set conditions are met, rather than continuously monitoring all beams. This periodic reporting mechanism reduces power consumption by enabling UEs to enter sleep modes between measurement periods while maintaining manageable device complexity through event-driven reporting triggers.
4Measurement precision
If beam-specific reference signals are implemented, then measurement precision is improved, but loss of information increases due to additional signaling overhead
Solution Approach 1:
The patent creates a universal beam set indication framework that can serve multiple functions: mobility event triggering, beam management, and measurement reporting. By designing the beam set indication mechanism to fulfill multiple roles simultaneously, the patent reduces redundant signaling overhead while maintaining high measurement precision, as the same beam set information is reused across different communication functions.
Data Source
AI summary
Certain aspects of the present disclosure provide techniques for reporting information regarding receive (Rx) beams used by a user equipment. In some cases, such reporting may indicate a change in Rx beams to be used by the UE for subsequent beamformed transmissions.