L1/L2 Cell Release via DCI for 5G Mobility
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Solution Overview
Problem
Current 5G NR systems face challenges in efficiently managing mobility configurations and deconfigurations of cells within a mobility configured cell set, leading to suboptimal resource utilization and increased power consumption due to the need to maintain information about unsuitable cells.
Innovation Solution
Implementing a method where a network entity transmits mobility deconfiguration information via RRC signaling or MAC-CE to release subsets of cells from the mobility configured cell set, allowing the UE to disassociate and remove mobility configurations, thereby freeing resources and reducing unnecessary measurements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the UE maintains mobility configurations for all cells in the mobility configured cell set, then mobility management coverage is improved, but resource utilization deteriorates and power consumption increases
Solution Approach 1:
The mobility configured cell set is segmented into two distinct groups: activated cells and deactivated cells. This segmentation allows the UE to maintain mobility configurations for all cells in the set while only actively managing and measuring activated cells, thereby reducing power consumption and resource utilization while preserving comprehensive mobility management coverage across the entire cell set.
2Adaptability or versatility
If the UE maintains mobility configurations for all cells in the mobility configured cell set, then mobility management coverage is improved, but resource utilization deteriorates
Solution Approach 1:
The mobility configured cell set is segmented into activated and deactivated cells. The UE maintains complete mobility configurations for all cells in the set, ensuring full mobility management coverage. However, by deactivating configurations for specific cells when not needed, the UE reduces the quantity of active resources (storage, processing, measurements) while preserving the ability to rapidly activate them when required.
3Adaptability or versatility
If the network provides detailed mobility configurations for multiple cells, then mobility management capability is improved, but device complexity increases
Solution Approach 1:
The system implements dynamic configuration management where cells can be transitioned between activated and deactivated states based on current mobility needs. This dynamic approach allows the UE to handle detailed mobility configurations for multiple cells without permanent complexity, as configurations are activated only when needed and deactivated when not needed, reducing the effective complexity at any given time while maintaining full capability.
Data Source
AI summary
Apparatus, methods, and computer program products for wireless communication are provided. An example method may include receiving, from a second network entity in RRC signaling, a set of mobility configurations, wherein each configuration of the set mobility configurations is associated with a respective cell of a mobility configured cell set, and wherein the set of mobility configurations comprises PCell configurations, wherein each PCell configuration of the PCell configurations corresponds to a respective cell in the mobility configured cell set. The example method may further include receiving, from the second network entity in DCI or a MAC-CE, mobility deconfiguration information configured to cause release of at least one subset of cells from the mobility configured cell set. The example method may further include releasing, based on the mobility deconfiguration information, the at least one subset of cells from the mobility configured cell set.