Priority-Aware HARQ-ACK and SR Multiplexing on PUCCH
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently multiplexing hybrid automatic repeat request acknowledgement (HARQ-ACK) and scheduling request (SR) with different priorities and physical uplink control channel formats, leading to potential collisions and inefficiencies in resource allocation.
Innovation Solution
A method and apparatus for appending bits of SR and HARQ-ACK with different priorities to form a multiplexed signal, selecting a PUCCH resource based on payload size, and transmitting this multiplexed signal using high priority PUCCH resources, with network nodes providing rules for resource selection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If HARQ-ACK and SR with different priorities are transmitted using separate PUCCH resources, then transmission reliability is improved, but resource allocation efficiency deteriorates due to potential collisions and resource waste
Solution Approach 1:
The patent merges HARQ-ACK and SR transmissions with different priorities into a single multiplexed PUCCH resource. The UE appends SR bits to HARQ-ACK bits and transmits them together using one PUCCH resource, eliminating the need for separate resources and preventing collisions while improving resource allocation efficiency
Solution Approach 2:
The patent creates a universal PUCCH transmission mechanism that can handle both HARQ-ACK and SR with different priorities using the same resource. The multiplexed PUCCH format is designed to carry combined control information from both channels, making the system more versatile and efficient
2Adaptability or versatility
If multiple PUCCH formats are used for different control information types, then transmission adaptability is improved, but system complexity deteriorates due to multiple resource selection rules
Solution Approach 1:
The patent develops a universal PUCCH format that can transmit both HARQ-ACK and SR information with different priorities. This single multiplexed format replaces the need for multiple specialized formats and their associated complex selection rules, reducing system complexity while maintaining adaptability
Solution Approach 2:
The patent applies different priority levels to specific portions of the control information (HARQ-ACK vs. SR bits) within the same PUCCH transmission. This allows the system to maintain differentiated quality of service for different control information types while using a unified transmission mechanism
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may append one or more bits of a scheduling request (SR), having a first priority and in a first physical uplink control channel (PUCCH) resource associated with a first format, to one of more bits of a hybrid automatic repeat request acknowledgement (HARQ-ACK), having a second priority and in a second PUCCH resource associated with a second format, to form a multiplexed SR and HARQ-ACK. The UE may select a PUCCH resource, from a plurality of high priority PUCCH resources, based at least in part on a payload size of the multiplexed SR and HARQ-ACK. The UE may transmit, to a network node, the multiplexed SR and HARQ-ACK using the selected PUCCH resource. Numerous other aspects are described.