Beam Management Using Multiple CSI-RS Configurations
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently managing beamforming due to the dynamic change in the number of antenna elements, leading to increased power consumption and overhead in beam management procedures.
Innovation Solution
The method involves transmitting information about supported numbers of CSI-RS resources per CSI-RS resource set and configuring these resources dynamically, allowing the network node to adapt the number of active antenna elements without explicit reconfiguration, thereby reducing power consumption and overhead.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the number of antenna elements is increased to improve beamforming performance, then beam quality and coverage are improved, but power consumption and system overhead increase
Solution Approach 1:
The patent implements dynamic antenna adaptation where the network node can change the number of active antenna elements based on current channel conditions and traffic requirements. The UE is configured with multiple CSI-RS resource sets corresponding to different numbers of antenna elements, allowing the system to dynamically switch between configurations without explicit reconfiguration signaling, thus reducing power consumption while maintaining beamforming performance when needed.
Solution Approach 2:
The system changes the parameter of antenna element count by providing multiple CSI-RS resource sets with different numbers of resources. The UE can be configured to use different resource sets based on channel conditions, effectively changing the system parameter (number of active antennas) to optimize between performance and power consumption without requiring full system reconfiguration.
2Manufacturing precision
If explicit reconfiguration signaling is used to adapt antenna elements, then configuration accuracy is improved, but signaling overhead and latency increase
Solution Approach 1:
The patent applies preliminary action by pre-configuring multiple CSI-RS resource sets at the UE side before actual beam management is needed. Each resource set corresponds to a different number of antenna elements. When adaptation is needed, the network node can simply indicate which pre-configured resource set to use, avoiding the need for explicit reconfiguration signaling and reducing both overhead and latency while maintaining configuration accuracy.
3Adaptability or versatility
If multiple CSI-RS resource configurations are maintained for different antenna counts, then adaptability is improved, but device complexity and overhead increase
Solution Approach 1:
The patent implements universality by designing a unified beam management framework where a single set of CSI-RS resource configurations serves multiple purposes - supporting different numbers of antenna elements through different resource sets. The UE processes all resource sets using the same beam management procedures, eliminating the need for separate handling logic for different antenna configurations and reducing overall system complexity while maintaining high adaptability.
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some examples, the described techniques can be used to perform beam management procedures using a selected configuration of a plurality of configurations, which enables adaptation to changing numbers of channel state information reference signal (CSI-RS) resources. Adapting to changing numbers of CSI-RS resources may enable the network to perform dynamic antenna adaptation, thereby changing the number of active spatial elements used to transmit the CSI-RS resources. Furthermore, signaling the selected configuration enables the network node to change the number of CSI-RS resources at a user equipment (UE) without explicitly reconfiguring the CSI-RS resource set. In some aspects, the UE may determine a configuration including a number of CSI-RS resources using a mapping between the configuration and a configuration of a number of CSI-RS resources for CSI measurement, which enables the UE to determine the selected configuration.