Configurable DCI Formats for URLLC Scheduling
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Solution Overview
Problem
Current downlink control information (DCI) formats in wireless communication systems, such as those defined in 3GPP Release 15, are not supportive enough for enhanced ultra-reliable low-latency communication (URLLC) services, requiring additional information like antenna port details, transmission configuration, and priority indications which are not adequately included.
Innovation Solution
Introduction of new or modified DCI formats, such as DCI format 0_2 for PUSCH and DCI format 1_2 for PDSCH, which include specific parameters like antenna ports, transmission configuration, priority indications, and time domain resource assignments, to support enhanced URLLC services by reinterpreting existing bit fields or adding new fields as needed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If existing DCI formats are used for scheduling PUSCH transmissions, then the communication structure provides basic scheduling capability, but the flexibility and efficiency for enhanced URLLC services are limited due to insufficient parameters
Solution Approach 1:
The patent introduces separate search spaces (first search space and second search space) for monitoring different DCI formats. This segmentation allows the system to handle multiple types of scheduling information independently, improving flexibility for URLLC services while maintaining manageable complexity through structured separation of functions.
Solution Approach 2:
The patent enables dynamic configuration of DCI formats with configurable parameters including antenna ports, carriers, priority levels, and time domain allocation tables. This dynamic adaptability allows the system to adjust scheduling parameters based on specific URLLC service requirements, enhancing versatility without requiring complete redesign of the control information structure.
2Reliability
If additional parameters are added to DCI formats to support enhanced URLLC services, then the capability to schedule transmissions improves, but the complexity of the control information increases
Solution Approach 1:
The patent applies different parameter sets to different search spaces based on local requirements. The first search space includes parameters optimized for certain URLLC scenarios (antenna ports, carriers, priority), while the second search space includes parameters for other scenarios (time domain allocation tables). This localized parameter configuration improves reliability for specific URLLC services while avoiding the need to include all possible parameters everywhere, thus managing overall complexity.
3Productivity
If multiple DCI formats are monitored in different search spaces, then the scheduling capability and flexibility are enhanced, but the processing complexity at the user equipment increases
Solution Approach 1:
The patent divides the search space monitoring function into distinct segments (first search space and second search space), each responsible for specific DCI formats with specific parameter sets. This segmentation enables parallel processing and independent optimization of each search space, improving overall scheduling efficiency while making the complex monitoring task more manageable through functional decomposition.
Data Source
AI summary
A user equipment (UE) is described. The UE includes a higher layer processor configured to monitor an uplink (UL) downlink control information (DCI) format that includes first information for scheduling an enhanced ultra-reliable low-latency communication (URLLC) service on a physical uplink shared channel (PUSCH). The higher layer processor is also configured to monitor a downlink (DL) DCI format that includes second information for scheduling the enhanced URLLC service on a physical downlink shared channel (PDSCH).