Delta Cell Configuration Signaling for Low-Latency Inter-Cell Mobility
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Solution Overview
Problem
Existing wireless communication systems, particularly 5G NR, face challenges in efficiently managing inter-cell mobility, leading to increased latency and suboptimal cell configuration during handovers.
Innovation Solution
Implementing delta signaling for L1/L2 mobility configurations, which includes both valid SCell and SpCell configurations, to facilitate fast and efficient cell management, especially in carrier aggregation frameworks, using delta signaling for specific and general cell configurations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If traditional signaling methods are used for cell configuration updates during inter-cell mobility, then comprehensive cell configuration information can be transmitted, but latency increases and mobility efficiency deteriorates
Solution Approach 1:
The patent extracts and transmits only the differential configuration parameters that have changed between cells, rather than transmitting complete cell configuration information. This is achieved by identifying delta parameters between the source cell and target cell configurations, and only signaling these differences to the UE, thereby reducing signaling latency and improving mobility efficiency
Solution Approach 2:
The cell configuration information is segmented into differential parameter sets that represent only the changes between cells. The configuration update is divided into identifiable delta parameters that can be processed and applied independently, reducing the overall signaling overhead and latency
2Manufacturing precision
If complete cell configuration information is transmitted during handover, then configuration accuracy is ensured, but signaling overhead increases and processing time increases
Solution Approach 1:
The patent extracts only the differential configuration parameters that differ between the source and target cells, rather than transmitting complete configuration information. This maintains configuration accuracy for the changed parameters while significantly reducing signaling overhead by eliminating redundant identical parameters
Solution Approach 2:
Instead of transmitting complete cell configuration information, the patent transmits only the partial differential parameters that are necessary to update the UE's configuration. This partial action approach maintains sufficient configuration accuracy while reducing signaling overhead
3Adaptability or versatility
If traditional cell configuration methods are used, then all configuration parameters can be updated, but the complexity of mobility management increases
Solution Approach 1:
The patent extracts and identifies only the differential parameters between cell configurations, separating the changed parameters from the unchanged ones. This simplifies mobility management by focusing only on the parameters that require updates, while maintaining the ability to handle complete configuration scenarios when needed
Solution Approach 2:
The configuration update process is segmented into identifying delta parameters, transmitting only those differences, and applying selective updates. This segmentation reduces mobility management complexity by breaking down the comprehensive configuration update into manageable differential parameter sets
Data Source
AI summary
Aspects presented herein may improve the latency and efficiency of L1/L2 inter-cell mobility. In one aspect, a UE receives a configuration for a set of cells associated with a mobility of the UE, where the set of cells includes an SpCell and an SCell, where the set of cells includes a first subset of activated cells and a second subset of deactivated cells, and where at least one first cell of the set of cells is a reference cell and one or more second cells of the set of cells are associated with the reference cell. The UE receives an indication of an updated configuration for the set of cells based on a movement of the UE, where the indication of the updated configuration is received from the network entity, where the updated configuration includes at least one new cell in the set of cells.