Beam Grouping for Mobility and Multi-Base Station Transmission
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Solution Overview
Problem
Current wireless communication systems face challenges in beam management and mobility management due to beam failures on common control resource sets (CORESET #0) and inefficient neighbor cell system information acquisition during mobility, leading to radio link failures and suboptimal user experiences.
Innovation Solution
Implementing a grouping of physical layer channels and associated receive beam assumptions to facilitate seamless mobility and reliable multi-base station transmissions by configuring UEs with specific beam directions and reference signals, allowing for smooth transitions and maintaining connectivity even during beam failures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If beam-based spatial filtering is used for directional communication, then communication reliability is improved, but beam failure occurs on common CORESETs leading to radio link failures
Solution Approach 1:
The patent segments the CORESET configuration into multiple groups, where each group is associated with different beam assumptions. This allows the system to diversify beam directions and avoid single-point beam failures, thereby maintaining communication reliability while mitigating the harmful effect of beam failure on common CORESETs.
Solution Approach 2:
The patent changes the beam assumption parameters by configuring multiple groups with different spatial filtering settings. When beam failure occurs in one group, the system can switch to another group with different beam parameters, thus preventing radio link failures and maintaining communication reliability.
2Ease of operation
If mobility management is based on cell-based events with RSRP measurements, then mobility procedures are simplified, but neighbor cell system information acquisition becomes inefficient
Solution Approach 1:
The patent performs preliminary acquisition of neighbor cell system information by configuring multiple groups of physical layer channels with different beam assumptions before mobility events occur. This allows the UE to have system information readily available when needed, improving resource utilization efficiency while maintaining simple mobility management procedures.
3Productivity
If multiple TRPs are deployed to improve network capacity and coverage, then network characteristics are enhanced, but device complexity increases
Solution Approach 1:
The patent creates a universal grouping mechanism that can be applied across multiple TRPs and different physical layer channels. By defining groups that can be reused for PDCCH, PDSCH, and other channels with different beam assumptions, the system enhances network capacity and coverage through multi-TRP deployment while avoiding excessive device complexity through standardized group configuration.
Data Source
AI summary
Aspects of the present disclosure provide a manner of associating a physical layer channel, such as, but not limited to, physical broadcast channel (PBCH), physical downlink control channel (PDCCH), and physical uplink control channel (PUCCH) and a receive beam assumption. The beam assumption may, for example, relate a receive beam direction with a reference signal transmitted by a base station in which the reference signal is used for any of multiple uses by a user equipment (UE), such as beam management, multiple BS, including terrestrial BS and/or non-terrestrial BS, and UE mobility.