CSI Reporting Configuration for URLLC Latency
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Solution Overview
Problem
Current wireless communication systems face challenges in configuring channel state information (CSI) reporting for different service types, such as ultra-reliable low latency communications (URLLC), which requires tailored configurations to balance throughput and latency, whereas existing methods lack flexibility and efficiency in managing CSI reporting for varying service types.
Innovation Solution
The proposed solution involves configuring separate CSI reporting configurations for different service types, such as URLLC and enhanced mobile broadband (eMBB), by using distinct parameters like codebook subsets, rank restrictions, and CQI tables, and employing separate lists of CSI triggers to optimize reporting for each service type, allowing for flexible and efficient CSI reporting tailored to specific service requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single unified CSI reporting configuration is used for all service types, then device complexity is reduced and configuration is simplified, but the system cannot meet the specific requirements of different service types (URLLC needs low latency while eMBB needs high throughput)
Solution Approach 1:
The patent divides the unified CSI reporting configuration into separate service-type-specific configurations. Different CSI reporting configurations are defined for different service types (e.g., URLLC and eMBB), allowing each service type to have optimized parameters such as reporting periodicity, payload size, and triggering mechanisms tailored to its specific requirements.
Solution Approach 2:
The patent introduces dynamic selection mechanisms where the UE can switch between different CSI reporting configurations based on the active service type. The network can dynamically indicate which configuration to use through DCI fields, allowing the system to adapt to changing service requirements without requiring separate physical configurations for each service type.
2Reliability
If separate CSI reporting configurations are used for different service types, then service-specific performance is optimized (URLLC latency, eMBB throughput), but processing overhead and configuration complexity increase
Solution Approach 1:
The patent creates a universal CSI reporting framework where a single configuration structure can serve multiple service types. The same CSI reporting mechanism is used across different service types, but with configurable parameters that can be adjusted based on service requirements. This reduces the need for entirely separate configurations while still providing service-specific optimization.
Solution Approach 2:
The patent optimizes specific parameters within CSI reporting configurations for different service types. For URLLC, parameters such as reporting periodicity is reduced and payload size is minimized to achieve low latency. For eMBB, parameters are configured to support higher throughput requirements. These parameter adjustments are made within a unified configuration framework rather than requiring completely separate systems.
3Reliability
If comprehensive CSI reporting is used to ensure accurate channel state information, then communication reliability is improved, but processing overhead and latency increase which is unacceptable for URLLC
Solution Approach 1:
The patent applies partial CSI reporting for URLLC services where only the most critical and time-sensitive channel state information is reported. Instead of reporting complete CSI including all detailed measurements and full payload information, the system reports only essential elements needed for rapid scheduling decisions, thereby reducing processing latency while maintaining sufficient accuracy for reliable URLLC communication.
Solution Approach 2:
The patent extracts and separates the essential CSI elements from the complete CSI set for URLLC services. By identifying and reporting only the critical channel state parameters needed for ultra-reliable low-latency communication, the system removes unnecessary processing overhead while preserving the reliability required for URLLC applications.
4Speed
If URLLC-specific optimizations are applied to reduce latency and processing overhead, then URLLC performance is improved, but eMBB throughput may be compromised
Solution Approach 1:
The patent segments the CSI reporting system into service-type-specific configurations that can be independently optimized. URLLC configurations use parameters optimized for low latency (shorter reporting intervals, smaller payloads), while eMBB configurations use parameters optimized for high throughput (more comprehensive reporting, larger payloads). Each service type operates with its own optimized configuration without interfering with the other.
Solution Approach 2:
The patent implements dynamic configuration selection where the UE can switch between URLLC-optimized and eMBB-optimized CSI reporting configurations based on the active service type. The network dynamically indicates which configuration to use through DCI fields, allowing the system to provide URLLC-specific optimizations when needed while maintaining eMBB performance when URLLC services are not active.
Data Source
AI summary
The present disclosure provides techniques configuring channel state information (CSI) reporting for certain service types, such as the ultra-reliable low latency communications (URLLC) service type. In some cases, a UE may obtain information regarding a first set of channel state information (CSI) reporting configurations for a first service type separate from a second set of CSI reporting configurations for a second service type, receive a first downlink control information (DCI) scheduling a CSI report for the first service type on at least one physical uplink shared channel (PUSCH), generate at least one CSI report for the first service type based on one of the first set of CSI reporting configurations selected based on a field in the DCI, and transmitting the CSI report for the first service type on the PUSCH.