5G Uplink Scheduling for HARQ-ACK Priority and Low Latency
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Solution Overview
Problem
There is a need for effective uplink transmission methods in wireless communication systems, particularly in 5G networks, to optimize the transmission of data and control information for eMBB and URLLC services, and to address issues related to HARQ-ACK codebook generation and multiplexing in groupcast/broadcast scenarios.
Innovation Solution
A method and apparatus for user equipment (UE) and base stations to transmit and receive data and control signaling based on downlink data and control signaling, with dynamic determination of uplink time units and priority handling for HARQ-ACK codebooks, enabling consistent behavior and improved reliability and latency reduction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If URLLC services are prioritized in uplink transmission scheduling, then latency is reduced and reliability is improved, but eMBB service performance deteriorates due to scheduling conflicts
Solution Approach 1:
The patent implements dynamic scheduling where the base station adaptively adjusts uplink transmission timing and resource allocation based on real-time service requirements. The gNB can dynamically prioritize URLLC or eMBB services depending on current network conditions, ensuring that URLLC gets timely resources when needed while minimizing impact on eMBB throughput through flexible resource management
Solution Approach 2:
The patent segments the uplink transmission process into separate handling paths for different service types. By dividing the scheduling mechanism into service-specific components, the system can allocate dedicated resources for URLLC while maintaining separate resource pools for eMBB, thereby preventing scheduling conflicts and ensuring both service types achieve their performance targets
2Loss of time
If dynamic scheduling is implemented to prioritize URLLC, then latency is reduced, but scheduling complexity increases
Solution Approach 1:
The patent employs pre-configured scheduling parameters and templates for different service types. The base station prepares scheduling decisions in advance based on service priorities, and when URLLC data arrives, pre-established rules enable rapid scheduling without complex real-time calculations, thus reducing latency while keeping the scheduling mechanism manageable
Solution Approach 2:
The patent utilizes parameter-based scheduling where specific parameters (such as priority levels, timing offsets, and resource allocation factors) are adjusted based on service type. By changing key parameters rather than recalculating entire scheduling algorithms, the system achieves low-latency URLLC scheduling with reduced computational complexity
3Productivity
If flexible scheduling is used to optimize spectrum efficiency, then resource utilization improves, but transmission timing uncertainty increases
Solution Approach 1:
The patent implements periodic scheduling intervals and timing patterns for uplink transmissions. By establishing regular scheduling cycles with predictable timing, the system maintains spectrum efficiency through flexible resource allocation within each period while ensuring that transmission timing remains predictable and synchronized between UE and base station
Data Source
AI summary
The disclosure relates to 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). The disclosure 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 The disclosure provides a user equipment (UE) in a wireless communication system and a method performed by the UE, including: receiving downlink data and/or downlink control signaling from a base station; and transmitting uplink data and/or uplink control signaling to the base station based on the downlink data and/or downlink control signaling received from the base station.