PUCCH Resource Selection for Flexible HARQ-ACK and SR Uplink
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Solution Overview
Problem
The increasing demand for flexible scheduling and efficient transmission of uplink data and control information in 5G wireless communication systems, particularly in scenarios where different services such as eMBB and URLLC overlap, leads to inefficiencies and degradation of performance in existing LTE systems.
Innovation Solution
A method for determining uplink data and control signaling transmission based on downlink data and control signaling, utilizing priority-based PUCCH configurations and multiplexing techniques to optimize the transmission of UCI, HARQ-ACK, SR, and CSI, ensuring efficient utilization of uplink control channel resources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If variable HARQ-ACK feedback delay is supported for flexible scheduling in 5G, then scheduling flexibility is improved, but system complexity increases
Solution Approach 1:
The patent segments the uplink time unit into multiple occasions for HARQ-ACK feedback transmission. By dividing the feedback opportunity into discrete occasions within an uplink time unit, the system achieves variable delay support through selective scheduling of these occasions, reducing overall system complexity while maintaining flexibility.
Solution Approach 2:
The patent implements dynamic HARQ-ACK feedback delay by allowing the feedback occasion to be variable within the uplink time unit based on scheduling needs. This dynamic adjustment mechanism enables the system to adapt feedback timing to different service requirements without固化 (fixing) the delay, balancing flexibility with manageable complexity.
2Reliability
If multiple PUCCH configurations with different priorities are used, then transmission reliability is improved, but channel resource management complexity increases
Solution Approach 1:
The patent applies local quality by configuring different PUCCH resources with different priorities for different uplink time units or occasions. High-priority PUCCH resources are allocated for critical HARQ-ACK feedback while lower-priority resources handle less critical transmissions, improving reliability for important signals without requiring all resources to be complex.
Solution Approach 2:
The patent changes the priority parameter of PUCCH configurations to differentiate resource importance. By assigning priority levels (e.g., priority 0 and priority 1) to different PUCCH resources, the system manages channel resources more efficiently, improving transmission reliability for high-priority communications while keeping resource management tractable through parameter-based differentiation.
3Productivity
If PUCCH resources are selected based on multiple criteria (priority, timeline, UCI type), then transmission efficiency is improved, but resource selection complexity increases
Solution Approach 1:
The patent performs preliminary configuration of PUCCH resources with assigned priorities and characteristics before actual transmission occurs. By pre-configuring multiple PUCCH resources with different priorities and suitable for different UCI types, the system enables efficient resource selection during transmission without complex real-time decisions, improving transmission efficiency while managing selection complexity through advance preparation.
Data Source
AI summary
A method performed by a user equipment (UE) in a wireless communication system, the method comprising: receiving, from a base station, first information associated with a physical uplink control channel (PUCCH) resource associated with hybrid automatic request—acknowledgement (HARQ-ACK); receiving, from the base station, a physical downlink shared channel (PDSCH); identifying the PUCCH resource based on second information associated with HARQ-ACK which is obtained from the first information, and third information associated with uplink control information (UCI); transmitting, to the base station, HARQ-ACK information for the PDSCH and at least one scheduling request (SR) via the identified PUCCH resource.