PUCCH Resource Determination for Uplink Control Information Collision
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Solution Overview
Problem
In LTE and next-generation wireless communications systems, when multiple PUCCH resources for periodic CSI and/or ACK/NACK collide, it becomes challenging to transmit uplink control information efficiently due to resource conflicts, leading to reduced transmission performance and potential waste of preconfigured resources.
Innovation Solution
A resource determining method and apparatus that allows for time division multiplexing of PUCCH resources, where conflicting resources are identified and allocated such that they do not share the same OFDM symbol, enabling efficient transmission of multiple UCI components in a single time unit without affecting transmission reliability or introducing additional feedback delays.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple PUCCH resources are configured for periodic CSI and ACK/NACK reporting, then transmission reliability of uplink control information is improved, but resource conflicts occur when multiple resources collide in the same time unit
Solution Approach 1:
The patent segments the transmission of uplink control information by dividing multiple UCI components into different time slots. When PUCCH resources collide, the terminal device transmits different UCI components in different slots rather than attempting simultaneous transmission, thereby resolving resource conflicts while maintaining transmission reliability through diversified resource usage.
Solution Approach 2:
The patent implements dynamic resource selection by introducing a parameter k that determines the time slot offset for transmitting different UCI components. The terminal device dynamically adjusts transmission timing based on resource collision detection, selecting appropriate time slots adaptively to avoid conflicts while ensuring all UCI components are transmitted reliably.
2Device complexity
If PUCCH resources are allocated in a fixed manner, then resource management is simplified, but resource waste occurs when conflicting resources cannot be transmitted simultaneously
Solution Approach 1:
The patent performs preliminary resource collision detection and planning before actual transmission. The terminal device identifies potential PUCCH resource conflicts in advance and pre-determines the transmission timing for different UCI components using the k parameter, thereby avoiding resource waste while maintaining manageable complexity through systematic resource allocation.
3Productivity
If multiple UCI components are transmitted in the same time unit, then transmission efficiency is improved, but transmission reliability deteriorates when resource conflicts occur
Solution Approach 1:
The patent ensures continuous transmission of uplink control information by sequentially transmitting different UCI components in adjacent time slots rather than interrupting transmission. The k parameter enables smooth time-slot transitions, maintaining the continuity of useful action (UCI transmission) while avoiding resource conflicts that would compromise reliability.
Data Source
AI summary
One example method includes determining, by a terminal device, that at least two physical uplink control channel (PUCCH) resources collide in a time unit n, where n is an integer, and the at least two PUCCH resources include a first resource configured for first uplink control information (UCI) and a second resource configured for second UCI. The terminal device can determine the first resource and a third resource in the time unit n, where the third resource is one of M PUCCH resources, the first resource and the third resource do not include a same orthogonal frequency division multiplexing (OFDM) symbol in time domain, M is a positive integer greater than or equal to 1, the first resource is used to carry a part or all of the first UCI, and the third resource is used to carry a part or all of the second UCI.