Aperiodic CSI Beam Switch Latency Management
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Solution Overview
Problem
Current wireless communication systems face challenges in managing computation delay for aperiodic channel state information (CSI) beam switching latency, which affects the efficiency of communication between user equipment (UE) and base stations, leading to potential degradation in communication performance and resource wastage due to failed communications and retransmissions.
Innovation Solution
The method involves determining a time duration for the computation delay based on an aperiodic CSI beam switch latency threshold, which is communicated through downlink control information (DCI), allowing user equipment (UE) to generate and transmit aperiodic CSI reports with sufficient latency to account for larger beam switch timing values, thereby preventing communication degradation and conserving resources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the beam switch timing value is increased to allow sufficient processing time for aperiodic CSI reports, then the computation delay is reduced and communication reliability is improved, but the latency in transmitting CSI reports increases
Solution Approach 1:
The base station determines and communicates the time duration for computation delay to the UE in advance through DCI, allowing the UE to prepare for aperiodic CSI report transmission with sufficient time for beam switching and processing, thereby improving reliability while managing latency expectations
Solution Approach 2:
The system dynamically adjusts the time duration parameter based on the aperiodic CSI beam switch latency threshold, allowing flexible optimization between processing time and transmission latency depending on channel conditions and UE capabilities
2Reliability
If the computation delay is extended to account for larger beam switch timing values, then processing completeness is improved and communication degradation is prevented, but the overall communication efficiency decreases
Solution Approach 1:
The time duration for computation delay is dynamically determined by the base station based on current beam switch latency thresholds and channel conditions, allowing the system to adapt between extended processing for reliability and shorter delays for efficiency based on real-time requirements
3Speed
If insufficient time is allocated for beam switching and CSI report generation, then communication latency is reduced and system responsiveness is improved, but communication failures increase and resources are wasted due to retransmissions
Solution Approach 1:
The base station determines and communicates the appropriate time duration in advance through DCI, allowing the UE to allocate sufficient resources for beam switching and CSI report generation, preventing communication failures and avoiding the energy waste of retransmissions while maintaining optimal responsiveness
Solution Approach 2:
The system uses feedback mechanisms where the base station monitors beam switch latency thresholds and adjusts the time duration accordingly, ensuring that sufficient time is allocated to prevent failures and resource wastage while maintaining system responsiveness
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive downlink control information (DCI) that schedules an aperiodic channel state information reference signal (CSI-RS) report. The UE may determine, based at least in part on the DCI, a time duration between an end of the DCI and a start of a communication on a physical uplink shared channel that includes the aperiodic CSI-RS report. The time duration may be based at least in part on an aperiodic CSI beam switch latency threshold. The UE may generate the aperiodic CSI-RS report based at least in part on a CSI-RS measurement. The UE may transmit the aperiodic CSI-RS report based at least in part on the DCI associated with the time duration. Numerous other aspects are provided.