Non-periodic CSI Triggering and Reporting in Wireless Communications
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Solution Overview
Problem
In wireless communication systems, multiple CSI report requests often lead to scheduling challenges and inefficiencies, particularly when multiple component carriers are involved, as existing techniques struggle to manage multiple CSI reports within a single uplink slot, resulting in resource constraints and reduced encoding gains.
Innovation Solution
The described techniques enable non-periodic CSI reporting by allowing multiple CSI report requests to be triggered in the same uplink slot, where the UE formats and transmits CSI reports using allocated resources, combines reports, or selects one report to disregard others, and includes mechanisms for handling lost report requests through DCI indications and bitmaps to ensure proper decoding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple CSI report requests are transmitted in different downlink slots triggering CSI reports in the same uplink slot, then the network can obtain comprehensive channel state information for multiple component carriers, but the UE faces scheduling challenges and resource constraints in transmitting multiple CSI reports
Solution Approach 1:
The patent combines multiple CSI reports into a single uplink transmission by multiplexing them on the same physical uplink shared channel (PUSCH). The UE receives multiple aperiodic CSI report requests from different downlink slots and merges the corresponding CSI reports into one combined transmission, thereby reducing scheduling complexity while maintaining comprehensive channel state information reporting.
Solution Approach 2:
The patent enables a single uplink slot to serve multiple CSI reporting functions simultaneously. By allowing multiple aperiodic CSI report requests to trigger CSI reports in the same uplink slot and combining them there, the system achieves multi-functionality where one uplink transmission handles multiple reporting tasks, improving resource utilization and reducing scheduling overhead.
2Manufacturing precision
If multiple CSI reports are transmitted separately in different uplink slots, then each CSI report can be transmitted with dedicated resources, but uplink resource requirements increase and encoding efficiency decreases
Solution Approach 1:
The patent merges multiple CSI reports into a single combined transmission on the PUSCH, thereby reducing the total uplink resource consumption. Instead of allocating separate resources for each CSI report transmission, the system consolidates them into one transmission, improving resource efficiency while maintaining the accuracy and integrity of each individual CSI report through proper formatting and multiplexing.
3Loss of information
If the UE transmits all requested CSI reports in the same uplink slot, then comprehensive channel state information is provided, but the transmission format complexity and processing requirements increase
Solution Approach 1:
The patent segments the combined CSI report transmission into structured components with specific formatting rules. Each CSI report within the combined transmission is organized according to defined formats, and the overall structure includes necessary identifiers and delimiters. This segmentation approach maintains information completeness while managing formatting complexity through standardized structures.
Solution Approach 2:
The patent implements dynamic formatting capabilities where the UE can adapt the CSI report transmission format based on the number and type of CSI reports being combined. The formatting structure dynamically adjusts to accommodate different scenarios, allowing comprehensive information transmission while optimizing processing requirements based on actual needs rather than using a fixed complex format for all cases.
Data Source
AI summary
Methods, systems, and devices for wireless communications are described that support non-periodic channel state information (CSI) triggering and reporting in wireless communications. In cases where two or more CSI report requests trigger multiple CSI report transmissions in an same uplink slot, a user equipment (UE) may format at least a subset of the multiple CSI reports according to a formatting configuration for transmission of multiple CSI reports in a same uplink slot. The UE may use allocated resources in the uplink slot for each CSI report that are allocated by the base station in the corresponding CSI report request. In some cases, the UE may combine the multiple CSI reports, or parts thereof, into a combined CSI report that may be transmitted using allocated resources of one of the CSI report requests.