L1/L2 Cell Selection for Wireless Mobility Latency
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Solution Overview
Problem
Current wireless communication systems, particularly in LTE and NR technologies, face challenges in efficiently managing cell selection and deselection for supporting L1/L2 based mobility, leading to increased latency and overhead in beam management, especially in multi-beam operations at higher carrier frequencies.
Innovation Solution
Implementing a method for identifying and indicating multiple selected/deselected cells or cell groups to wireless communication devices, allowing for efficient cell switching via lower layers (L1/L2) by transmitting information on cell status, such as reference signal received power (RSRP), to facilitate L1/L2-centric inter-cell mobility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If traditional cell selection and deselection procedures are used in LTE and NR technologies, then mobility management can be maintained, but latency and overhead in beam management increase
Solution Approach 1:
The patent segments the cell selection and deselection procedures into separate, independent operations that can be executed at lower layers (L1/L2). Instead of treating beam management as a monolithic higher-layer function, the invention divides it into discrete cell-level operations that can be processed independently, reducing overall latency and overhead in mobility management
Solution Approach 2:
The patent enables lower layers (L1/L2) to autonomously perform cell selection and deselection operations without requiring constant intervention from higher layers. By empowering lower layers with self-service capabilities to manage cell states based on local measurements and conditions, the system reduces signaling overhead and accelerates mobility responses
2Productivity
If multiple cells are managed for L1/L2 based mobility, then cell switching efficiency improves, but signaling overhead increases
Solution Approach 1:
The patent merges the management of multiple cells into a unified L1/L2-based mobility framework. By combining cell selection, cell deselection, and cell switching operations into a coordinated lower-layer process, the invention achieves efficient multi-cell management while reducing the need for separate higher-layer signaling for each operation
Solution Approach 2:
The patent implements preliminary cell selection and preparation at L1/L2 layers before actual switching is needed. By pre-identifying and pre-configuring target cells in advance, the system reduces the signaling overhead required during actual cell switching events, as much of the preparation work has already been completed at lower layers
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a first wireless communication device may identify a plurality of cells associated with serving a user equipment (UE), where each cell of the plurality of cells has been either selected for serving the UE or deselected for serving the UE. The first wireless communication device may transmit an indication of the plurality of cells associated with serving the UE to a second wireless communication device, where the indication includes information indicating whether each cell of the plurality of cells has been selected for serving the UE or has been deselected for serving the UE. Numerous other aspects are provided.