5G Uplink Scheduling for eMBB HARQ-ACK and URLLC Priority
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Solution Overview
Problem
The challenge in 5G communication systems is optimizing the transmission of data and control information for eMBB and URLLC services, particularly in scenarios where URLLC services are sparse, leading to performance loss for eMBB services due to preferential transmission of URLLC data.
Innovation Solution
A method and apparatus for dynamic adjustment of uplink transmission timing and priority levels for HARQ-ACK feedback and data transmission, allowing flexible scheduling of eMBB and URLLC services based on service requirements and network conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If URLLC services are transmitted with preferential priority to ensure low latency and high reliability, then URLLC service performance is improved, but eMBB service performance deteriorates due to resource occupation and transmission timing conflicts
Solution Approach 1:
The patent implements dynamic adjustment of HARQ-ACK feedback timing for eMBB services based on URLLC transmission status. When URLLC services are detected, the system dynamically modifies the timing of eMBB HARQ-ACK feedback to avoid uplink resource conflicts, allowing URLLC to maintain priority while preserving eMBB performance through adaptive scheduling
Solution Approach 2:
The patent segments the uplink transmission resources by creating separate handling mechanisms for eMBB and URLLC services. It divides the HARQ-ACK feedback into different timing scenarios: when URLLC is present, eMBB HARQ-ACK uses adjusted timing, while when URLLC is absent, normal eMBB timing is applied, thus resolving the resource conflict between service types
2Ease of operation
If HARQ-ACK feedback timing is fixed according to standard procedures, then system complexity is reduced and ease of operation is improved, but transmission efficiency deteriorates when URLLC and eMBB services overlap in time
Solution Approach 1:
The patent transitions from fixed HARQ-ACK timing to dynamic timing adjustment based on service type detection. The base station monitors uplink grant timing and dynamically determines whether to apply standard or adjusted HARQ-ACK feedback timing for eMBB services, optimizing transmission efficiency without significantly increasing operational complexity through automated detection and adjustment mechanisms
3Adaptability or versatility
If uplink resources are allocated to accommodate both eMBB and URLLC services simultaneously, then service coverage is expanded, but resource conflicts increase leading to performance loss
Solution Approach 1:
The patent applies preliminary action by having the base station detect and identify URLLC services before they cause resource conflicts with eMBB services. By提前 identifying the presence of URLLC transmissions in uplink grants, the system can proactively adjust eMBB HARQ-ACK timing to prevent conflicts, thereby maintaining transmission performance stability while supporting multiple service types
Solution Approach 2:
The patent introduces an intermediary mechanism in the form of adjusted HARQ-ACK feedback timing that mediates between URLLC and eMBB service requirements. This intermediary adjustment layer allows both service types to coexist by coordinating their resource usage through modified feedback timing, preventing direct resource conflicts while maintaining both services' performance
Data Source
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AI summary
A communication method and system for converging a 5th-Generation (5G) communication system for supporting higher data rates beyond a 4th-Generation (4G) system with a technology for Internet of Things (IoT) may be applied to intelligent services based on the 5G communication technology and the IoT-related technology, such as smart home, smart building, smart city, smart car, connected car, health care, digital education, smart retail, security and safety services. A method performed by a user equipment (UE)includes: receiving downlink data and/or downlink control signaling from a base station; determining uplink data and/or uplink control signaling, an uplink time unit and/or an uplink physical channel for transmitting the uplink data and/or the uplink control signaling based on the downlink data and/or the downlink control signaling; and transmitting the uplink data and/or uplink control signaling to the base station on the determined uplink time unit and/or uplink physical channel.