Aperiodic CSI Slot Aggregation for Timely Uplink Transmission
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing wireless communication systems, particularly in NR and LTE, face challenges in efficiently transmitting aperiodic channel state information (A-CSI) due to limitations in slot aggregation, leading to suboptimal channel estimation and resource utilization.
Innovation Solution
Implementing A-CSI transmission on slot aggregated physical uplink control channel (PUCCH) or physical uplink shared channel (PUSCH), allowing A-CSI to be transmitted in one or multiple aggregated slots that satisfy the A-CSI timeline, with options for early, middle, or final slot transmission based on specific rules.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If A-CSI is transmitted in slot aggregated systems using conventional methods, then transmission can occur, but channel estimation performance is suboptimal and resource utilization is inefficient
Solution Approach 1:
The patent implements dynamic slot selection for A-CSI transmission within aggregated slots. The UE determines which specific slot to transmit A-CSI based on timing relationships, grant indications, and channel conditions, rather than using fixed transmission patterns. This dynamic approach optimizes channel estimation accuracy while efficiently utilizing available resources in slot-aggregated systems
Solution Approach 2:
The patent segments the aggregated slots into multiple transmission opportunities for A-CSI. Instead of treating slot aggregation as a single transmission unit, the method identifies specific sub-slots or symbols within the aggregated structure for A-CSI transmission, allowing selective resource usage and improved channel estimation performance
2Reliability
If A-CSI transmission timing is not optimized in slot aggregated systems, then transmission simplicity is maintained, but transmission timeliness and reliability deteriorate
Solution Approach 1:
The patent establishes predetermined rules and criteria for selecting A-CSI transmission slots within aggregated slots. The UE pre-determines which slots are suitable for A-CSI transmission based on grant timing, slot aggregation configuration, and timeline requirements before actual transmission occurs. This preliminary determination ensures reliable and timely transmission while managing complexity through structured decision-making
Data Source
AI summary
Certain aspects of the present disclosure provide techniques for aperiodic channel state information (A-CSI) transmission with slot aggregation. A method that may be performed by a user equipment (UE) includes receiving a grant scheduling a slot aggregated transmission in a plurality of aggregated slots and triggering an aperiodic channel state information (A-CSI) transmission in one of the plurality of aggregated slots. The method includes determining one or more of the plurality of aggregated slots to transmit the A-CSI transmission. The method includes transmitting the A-CSI transmission in the determined one or more of the plurality of aggregated slots.