PUCCH HARQ-ACK Priority Allocation for Short SPS Cycles
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing radio communication systems face challenges in efficiently transmitting HARQ-ACKs with different priorities over a single PUCCH, leading to increased delay and decreased reliability, particularly in cases where multiple SPS PDSCHs are set with shortened cycles, resulting in increased HARQ-ACKs that cannot be transmitted to the network.
Innovation Solution
The terminal, a base station and a radio communication method that perform communication concerning acknowledgment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If multiple HARQ-ACKs with different priorities are transmitted over a single PUCCH, then resource overhead is reduced, but it becomes difficult to allocate appropriate resources for each priority level
Solution Approach 1:
The patent segments the resource allocation by associating each HARQ-ACK priority level with a specific PUCCH resource type. High-priority HARQ-ACKs use dedicated high-priority PUCCH resources, while low-priority HARQ-ACKs use low-priority PUCCH resources. This segmentation allows the system to transmit multiple HARQ-ACKs over a single PUCCH while maintaining clear resource allocation rules for each priority level, thus reducing overall resource overhead without increasing allocation complexity.
2Speed
If HARQ-ACKs are transmitted with shortened SPS PDSCH cycles, then communication speed is improved, but the number of HARQ-ACKs increases leading to transmission failures
Solution Approach 1:
The patent applies local quality by differentiating resource allocation based on HARQ-ACK priority levels. When multiple HARQ-ACKs are generated due to shortened SPS PDSCH cycles, the system assigns high-priority HARQ-ACKs to reliable high-priority PUCCH resources with appropriate timing and power allocation, while low-priority HARQ-ACKs use corresponding low-priority resources. This ensures that critical acknowledgments are transmitted reliably even under shortened cycle conditions, maintaining overall transmission reliability while enabling faster communication.
3Productivity
If multiple HARQ-ACKs are multiplexed in one PUCCH, then transmission efficiency is improved, but delay increases due to resource allocation uncertainty
Solution Approach 1:
The patent implements preliminary action by pre-configuring and pre-associating PUCCH resources with specific HARQ-ACK priority levels before transmission occurs. The network configures high-priority and low-priority PUCCH resources in advance, and the terminal pre-determines which resource to use based on the priority of each HARQ-ACK. This eliminates resource allocation uncertainty during actual transmission, allowing multiple HARQ-ACKs to be efficiently multiplexed in one PUCCH without incurring additional delay for resource selection.
Data Source
AI summary
A terminal comprising: a control unit that performs feedback control to transmit two or more acknowledgments over one physical uplink control channel, wherein the control unit performs, when the two or more acknowledgments include a first acknowledgment with a first priority and a second acknowledgment with a second priority different from the first priority, the feedback control using a resource related to a specific acknowledgment of either the first acknowledgment or the second acknowledgment.