5G NR Secondary Cell Dormant State BWP Measurement
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Solution Overview
Problem
In the 5G NR system, the introduction of the concept of Beam Management (BM) measurement mechanisms is necessary, but existing technologies face inefficiencies due to the lack of a dormant state for Secondary Cells (Scells), leading to increased signaling load and reduced radio resource usage efficiency, especially in dense small-cell deployment scenarios.
Innovation Solution
A measurement management method and apparatus that determine a first Bandwidth Part (BWP) for BM measurement, allowing Scells to enter a dormant state with dormancy behavior, reducing the need for BM measurement across all BWPs and optimizing resource usage by performing measurements only in an activated or dormant BWP.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If BM measurement is performed across all BWPs for Scells, then measurement completeness is improved, but signaling load increases and radio resource usage efficiency deteriorates
Solution Approach 1:
The patent extracts the BM measurement function from all BWPs and concentrates it only in the active BWP. When Scell enters dormant state, BM measurements are taken out from inactive BWPs, reducing unnecessary measurement signaling while maintaining measurement effectiveness in the active BWP where beam management is actually needed.
Solution Approach 2:
Instead of performing BM measurements in all BWPs (excessive action), the patent applies partial action by limiting measurements only to the active BWP. This partial measurement approach is sufficient for beam management purposes while significantly reducing signaling overhead and resource consumption.
2Measurement precision
If BM measurement is performed across all BWPs for Scells, then measurement completeness is improved, but radio resource usage efficiency deteriorates
Solution Approach 1:
The patent extracts BM measurement activities from dormant BWPs and concentrates them only in the active BWP. This extraction eliminates wasteful resource consumption in inactive BWPs while preserving necessary measurements in the active BWP, thereby improving overall radio resource usage efficiency.
Solution Approach 2:
The patent applies partial measurement action by performing BM measurements only in the active BWP rather than all BWPs. This partial approach maintains sufficient measurement capability for beam management while optimizing radio resource utilization by avoiding redundant measurements in dormant BWPs.
3Reliability
If Scell remains in activated state without dormant state, then measurement capability is maintained, but resource consumption increases
Solution Approach 1:
The patent introduces a dormant state that dynamically adjusts the measurement behavior of Scell. When traffic demand is low, Scell transitions to dormant state with reduced measurements, conserving resources. When traffic demand increases, Scell can transition back to activated state with full measurement capability, providing dynamic adaptation to varying conditions.
Solution Approach 2:
The patent changes the measurement parameter state by introducing a dormant state with modified measurement characteristics. In dormant state, BM measurements are performed only in active BWP with reduced frequency and scope compared to activated state, allowing the system to adjust measurement intensity based on actual needs and reduce resource consumption accordingly.
Data Source
AI summary
A measurement management method and terminal device are provided. The method includes the following. A terminal device determines a first bandwidth part (BWP) when a first serving cell of the terminal device is in a first state, where beam management (BM) measurement with respect to the first serving cell is performed in the first BWP, and the first state includes a dormant state or an activated state with dormancy behavior.