Uplink Control Information Determination for 5G NR Services
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Solution Overview
Problem
In 5G NR systems, the sharing of downlink control information between ultra-reliable low-latency communication (URLLC) and enhanced mobile broadband (eMBB) services results in redundant feedback information due to differing delay requirements, making it challenging to determine optimal bit quantities for feedback transmission.
Innovation Solution
A method for determining uplink control information involves obtaining a target parameter set with specific parameter values for each data type, where unused parameter values are excluded from determining the bit quantity for feedback information, thereby avoiding redundant data transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If URLLC and eMBB services share the same DCI format with a unified parameter set, then the system achieves simplicity in control signaling, but redundant feedback information is generated due to differing delay requirements of the two service types
Solution Approach 1:
The parameter set in DCI is segmented into service-specific subsets. URLLC services use a first parameter set with parameters optimized for low latency, while eMBB services use a second parameter set with parameters optimized for high throughput. This segmentation allows each service type to use only the parameters relevant to its requirements, eliminating redundant information in feedback while maintaining simple control signaling structures.
Solution Approach 2:
Different parameter sets are assigned to different service types based on their specific requirements. The DCI format includes service identification information that indicates which parameter set should be used. This local quality approach ensures that URLLC traffic receives parameters suited for ultra-reliable low-latency communication, while eMBB traffic receives parameters optimized for enhanced mobile broadband, preventing cross-service parameter conflicts and redundant feedback.
2Adaptability or versatility
If a unified parameter set is used for both URLLC and eMBB services, then the DCI format achieves broad compatibility, but the feedback information contains unnecessary data for specific service types
Solution Approach 1:
The DCI format dynamically adapts to different service types by including service identification information that determines which parameter set to apply. When URLLC traffic is detected, the first parameter set is activated; when eMBB traffic is detected, the second parameter set is activated. This dynamic adaptation maintains broad compatibility across service types while optimizing feedback transmission efficiency by using only necessary parameters for each specific service.
Solution Approach 2:
The system changes parameters based on service type requirements. The DCI format includes indicators that trigger different parameter interpretations: for URLLC, parameters are interpreted according to the first parameter set with smaller value ranges suited for low latency; for eMBB, parameters are interpreted according to the second parameter set with larger value ranges suited for high throughput. This parameter changing mechanism ensures both compatibility and efficiency.
Data Source
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AI summary
A method for determining uplink control information and a communications device are disclosed in implementation of this application. The method includes: obtaining, by a communications device, a target parameter set, where the target parameter set includes at least one first parameter value and at least one second parameter value, the at least one first parameter value is used for transmitting a first kind of data, and the at least one second parameter value is not used for transmitting the first kind of data; and determining, by the communications device according to the at least one first parameter value, a quantity of bits for transmission of feedback information associated with the first kind of data.