L1 Inter-cell Beam Management via SSB and Sync-CSI-RS
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Solution Overview
Problem
Current wireless communication systems, particularly in 5G NR, face challenges in efficient inter-cell beam management due to limitations in Layer 1 (L1) techniques, which hinder accurate time/frequency synchronization and result in suboptimal resource scheduling across cells.
Innovation Solution
The implementation of Synchronization Signal Block (SSB)-based and Synchronization CSI-RS (Channel State Information)-based methods for L1 inter-cell beam management, where SSB resources and Sync-CSI-RS configurations are used to enhance time/frequency synchronization accuracy, allowing for more precise RSRP estimation and efficient resource allocation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional L1 beam management techniques are used, then device complexity is reduced, but time/frequency synchronization accuracy deteriorates
Solution Approach 1:
The patent applies multi-functionality by using SSB resources and Sync-CSI-RS configurations for multiple purposes: beam management, time synchronization, frequency synchronization, and RSRP estimation. This allows a single set of reference signals to serve multiple functions, improving synchronization accuracy without proportionally increasing system complexity
Solution Approach 2:
The patent changes key parameters including introducing new reference signal types (Sync-CSI-RS), modifying resource configuration parameters (ssb-Resources IE, CSI-ResourceConfig), and adjusting measurement parameters (RSRP estimation) to achieve better synchronization accuracy while managing complexity through standardized parameter sets
2Measurement precision
If SSB-based and Sync-CSI-RS methods are implemented, then RSRP estimation accuracy is improved, but device complexity increases
Solution Approach 1:
The patent segments the beam management process into distinct phases: SSB-based initial beam identification and Sync-CSI-RS-based refined RSRP estimation. This segmentation allows each method to be optimized independently, improving overall measurement precision while managing complexity through modular implementation
Solution Approach 2:
The patent applies preliminary action by using SSB resources for initial beam identification and coarse synchronization before deploying Sync-CSI-RS for refined RSRP estimation. This preliminary step reduces the search space and complexity for subsequent precise measurements
Data Source
AI summary
Techniques discussed herein can facilitate L1 (Layer 1) inter-cell beam management. Various embodiments can employ at least one of a first set of techniques or a second set of techniques for L1 inter-cell beam management. The first set of techniques can employ SSB (Synchronization Signal Block)-based L1 inter-cell beam management. The second set of techniques can employ Sync (Synchronization)-CSI (Channel State Information)-RS (Reference Signal)-based L1 inter-cell beam management. Various options of the second set of techniques can employ CSI-RS with CDM (Code Division Multiplexing) or without CDM.