Beam Management Using CSI-RS Resources in Wireless Networks
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently managing transmission beams in non-terrestrial networks, particularly due to the computational burden on user terminals when using synchronization signals for beam management, which can lead to unnecessary processing and interruptions in data transmissions.
Innovation Solution
The use of channel state information (CSI) reference signals (CSI-RSs) is introduced to reduce the computational load by transmitting them over a set of reference signal resources associated with each transmission beam, allowing user terminals to estimate channel quality and select optimal beams without relying solely on synchronization signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If synchronization signals are used for beam management, then beam selection can be performed, but computational burden on user terminals increases and data transmission interruptions occur
Solution Approach 1:
The patent introduces CSI-RS (channel state information reference signals) as an intermediary mechanism between the gNodeB and UE for beam management. Instead of relying solely on synchronization signals for beam selection, the CSI-RS provides dedicated reference signals that enable the UE to estimate channel quality without requiring complex processing of synchronization signals, thereby reducing computational burden while maintaining beam management functionality
Solution Approach 2:
The patent creates a separate reference signal system (CSI-RS) that copies the essential function of synchronization signals for beam management but with reduced computational complexity. The CSI-RS signals are transmitted along with synchronization signals and provide simplified channel state information that the UE can process more efficiently to determine optimal beams
2Ease of operation
If synchronization signals are used for beam management, then beam selection can be performed, but data transmission interruptions increase
Solution Approach 1:
The patent enables continuous beam management by transmitting CSI-RS signals concurrently with synchronization signals rather than requiring sequential processing. This allows the UE to continuously estimate channel quality and select optimal beams without interrupting data transmissions, as the CSI-RS provides ongoing channel state information that can be processed in parallel with data communication
3Adaptability or versatility
If multiple transmission beams are used for different frequency ranges, then frequency range coverage is improved, but beam management complexity increases
Solution Approach 1:
The patent segments the beam management process by associating specific reference signals with specific frequency ranges. Different CSI-RS signals are transmitted for different frequency ranges (e.g., first frequency range and second frequency range), allowing the UE to process each frequency range's beam information separately and independently, thereby reducing overall complexity while maintaining support for multiple frequency ranges
Data Source
AI summary
Methods, systems, and devices for wireless communications are described. A satellite may determine one or more sets set of resources for conveying reference signals to a user terminal. In one example, the satellite may determine a set of resources that includes multiple resource groups each associated with a respective frequency range. In another example, the satellite may determine multiples sets of resources and each set of resources may include resources within respective frequency range. Upon determining the set(s) of resources, the satellite may transmit an indication of the set(s) of resources to a user terminal.