Multi-Panel WTRU Uplink Beam Sweeping Configuration
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current 5G New Radio (NR) systems face challenges in efficiently managing uplink beam sweeping across multiple antenna panels, leading to increased latency and overhead in beam training and selection processes, particularly in scenarios involving multiple transmission/reception points (TRPs) and heterogeneous antenna configurations.
Innovation Solution
A multi-panel wireless transmit/receive unit (WTRU) is designed to perform uplink beam sweeping by sending antenna panel capability information and receiving reference signal (RS) configuration, identifying triggered RS resource sets, and determining an uplink transmission (TX) beam sweeping mode based on the association between RS resources and antenna panels, enabling both sequential and simultaneous beam sweeping modes to optimize beam management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If traditional uplink beam sweeping is performed across multiple antenna panels, then beam management coverage is improved, but latency and overhead increase
Solution Approach 1:
The patent segments the beam sweeping process by associating specific antenna panels with specific reference signal (RS) resource sets. Instead of having all panels sweep all beams sequentially (which would increase latency), the system divides the sweeping task into parallel segments where each panel is responsible for a dedicated RS resource set, enabling simultaneous operation across multiple panels without full beam sweeping overhead.
Solution Approach 2:
The patent applies preliminary action by pre-configuring the association between antenna panels and RS resource sets before beam sweeping begins. The network side device configures which antenna panel should use which RS resource set in advance, so that when beam sweeping starts, panels can immediately begin their designated sweeping tasks without prior coordination delays, reducing overall latency.
2Measurement precision
If all antenna panels perform full beam sweeping, then beam selection accuracy is improved, but processing overhead increases
Solution Approach 1:
The patent applies local quality by assigning different RS resource sets to different antenna panels based on their specific capabilities and spatial characteristics. Each antenna panel is configured with a dedicated RS resource set that is optimized for that panel's local conditions, allowing each panel to perform beam sweeping with appropriate precision for its specific location and orientation rather than all panels performing identical full sweeping procedures.
Solution Approach 2:
The patent applies partial action by having each antenna panel perform beam sweeping only on the RS resource sets assigned to it, rather than all panels performing complete beam sweeping across all possible beams. This partial approach maintains sufficient beam selection accuracy for each panel's operational requirements while significantly reducing the overall processing overhead that would result from every panel executing every possible beam sweeping operation.
3Productivity
If antenna panels are configured with dedicated RS resource sets, then beam sweeping efficiency is improved, but configuration complexity increases
Solution Approach 1:
The patent applies universality by creating a standardized configuration framework where the network side device uses a unified approach to assign RS resource sets to antenna panels. The same configuration mechanism and association rules can be applied across different panels and deployment scenarios, making the system universally applicable while maintaining the efficiency benefits of dedicated resource set assignment. This standardized universality reduces the practical complexity of configuration despite the specialized nature of the resource set assignments.
Data Source
AI summary
Methods and apparatus for beam management are disclosed. A WTRU may include a plurality of antenna panels, each antenna panel comprising a plurality of antennas configured to transmit on directional transmit (TX) beams. The WTRU may send, to a transmission reception point (TRP), antenna panel capability information for the plurality of antenna panels and receive a reference signal (RS) configuration for configuring RS resource sets. The WTRU may send an RS transmission trigger frame identifying triggered RS resource sets from the configured RS resource sets. The WTRU may identify a set of antenna panels to be used with the triggered RS resource sets. The WTRU may determine an UL TX beam sweeping mode and an association between the triggered RS resources sets and the set of antenna panels. The WTRU may perform UL beam sweeping using the triggered RS resource sets and associated set of antenna panels.