Beam Reporting for Active Beams in Wireless Communications
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Solution Overview
Problem
Conventional wireless communication systems face challenges in timely and efficient reporting of active transmit beam changes due to the frequency of beam changes exceeding the capabilities of existing radio resource control (RRC) signaling, leading to excessive signaling and time delays in obtaining measurement reports.
Innovation Solution
The described techniques enable wireless devices to associate reference signals with active transmit beams, allowing for quick identification of reference signal identifiers and updating channel state information (CSI) resource settings, enabling timely channel measurement and feedback reporting by maintaining a resource set associated with active transmit beams.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If RRC signaling is used to configure and update CSI resource settings for beam measurement and reporting, then the system can maintain accurate channel state information for active beams, but the signaling overhead increases and time delays occur when beam changes exceed the signaling update capability
Solution Approach 1:
The patent applies preliminary action by pre-configuring multiple CSI resource settings corresponding to different active beams before beam switching occurs. When a beam change is detected, the UE can immediately use the pre-configured CSI resource setting for the new beam without waiting for RRC reconfiguration, thereby reducing time delay while maintaining measurement accuracy.
Solution Approach 2:
The patent implements dynamics by enabling the UE to dynamically switch between different CSI resource settings based on the current active beam. The system transitions from a static RRC-configured approach to a dynamic mechanism where CSI resource settings can be quickly activated/deactivated according to beam changes, reducing signaling overhead and latency.
2Measurement precision
If RRC signaling is used to update CSI resource settings for each beam change, then the channel measurement can be accurately configured, but the signaling overhead becomes excessive
Solution Approach 1:
The patent reduces signaling overhead by pre-configuring multiple CSI resource settings corresponding to different active beams in advance through RRC signaling. Once configured, these resource settings can be quickly activated or deactivated based on beam changes without requiring additional RRC signaling, thereby maintaining measurement precision while reducing the quantity of signaling messages.
Solution Approach 2:
The patent implements a dynamic mechanism where the UE can quickly switch between pre-configured CSI resource settings based on the current active beam. This dynamic approach eliminates the need for excessive RRC signaling updates while maintaining accurate beam measurement, as the appropriate CSI resource setting is already available for immediate use.
Data Source
AI summary
Methods, systems, and devices for wireless communications are described. A wireless device, such as a user equipment and/or a base station, may determine that an active transmit beam has changed from a first transmit beam to a second transmit beam, the second transmit beam being different from the first transmit beam. The wireless device may identify a reference signal identifier that is associated with the second transmit beam. The wireless device may update, based at least in part on the identifying, a channel state information (CSI) resource setting to include the reference signal identifier, wherein the CSI resource setting is associated with the active transmit beam.