HARQ-ACK Multiplexing for Wireless Resource Efficiency
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Solution Overview
Problem
Current wireless communications networks face challenges in efficiently handling diverse devices with varying data traffic profiles and requirements, such as high data rate applications and critical applications with stringent latency and reliability needs, due to limitations in resource allocation and HARQ-ACK signaling.
Innovation Solution
The method involves receiving downlink transmissions in pre-configured PDSCH resources, determining HARQ acknowledgments, and identifying physical layer priorities for HARQ-ACKs, which are then multiplexed into uplink communications resources like PUCCH or PUSCH based on priority and Mux indicators, optimizing resource utilization and reducing latency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If HARQ-ACKs for different HARQ processes are transmitted using separate uplink resources, then reliability of individual acknowledgments is improved, but resource utilization efficiency deteriorates
Solution Approach 1:
The patent combines multiple HARQ-ACKs from different HARQ processes into a single uplink transmission by multiplexing them in the same time-frequency resources. The network equipment receives multiple downlink transmissions on different PDSCH resources and the terminal device multiplexes the corresponding HARQ-ACKs together, improving resource utilization while maintaining reliability through proper signaling mechanisms.
Solution Approach 2:
The patent enables a single uplink resource to serve multiple functions by carrying HARQ-ACKs for multiple different HARQ processes simultaneously. This multi-functional approach allows the same uplink transmission channel to acknowledge multiple downlink transmissions, thereby improving overall system efficiency without compromising individual acknowledgment reliability.
2Productivity
If multiple HARQ-ACKs are multiplexed into the same uplink resource, then resource utilization efficiency is improved, but complexity of HARQ process management increases
Solution Approach 1:
The patent segments the HARQ-ACK information by associating each HARQ-ACK with its corresponding HARQ process identifier. This segmentation allows the network and terminal to distinguish and manage individual acknowledgments within the multiplexed transmission, reducing management complexity while maintaining high resource utilization efficiency.
Solution Approach 2:
The patent introduces HARQ process identifiers as intermediary elements that facilitate the management of multiplexed HARQ-ACKs. These identifiers act as mediators between the multiplexed acknowledgments and the HARQ process management logic, enabling efficient tracking and processing of multiple acknowledgments without increasing overall system complexity.
3Adaptability or versatility
If HARQ-ACKs are transmitted with different priorities, then ability to support diverse traffic profiles is improved, but complexity of priority identification and multiplexing increases
Solution Approach 1:
The patent applies different priority levels to different HARQ-ACKs based on their specific traffic requirements. Each HARQ-ACK is tagged with priority information corresponding to its traffic profile (e.g., URLLC vs. eMBB), allowing differentiated handling and multiplexing decisions at the local level without requiring complex global prioritization mechanisms.
Solution Approach 2:
The patent changes the parameter of HARQ-ACK transmission by introducing priority levels as an additional dimension. This parameter change enables the system to adapt to diverse traffic profiles by varying the priority of different acknowledgments, while the multiplexing mechanism handles these variations through standardized procedures that do not significantly increase complexity.
Data Source
AI summary
A method of operating a communications device to receive data from a wireless communications network is provided.