PUCCH Collision Resolution for Multi-Slot Repetition
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Solution Overview
Problem
In New Radio (NR) systems, PUCCH collisions occur due to multi-slot PUCCH repetition, leading to overlapping PUCCHs in the time domain, which affects communication effectiveness and causes ambiguity between terminals and base stations.
Innovation Solution
A method for resolving PUCCH collisions by determining which PUCCH to transmit and which to discard or delay based on configuration parameters such as priority, period, starting time, format, and transmission mode, ensuring higher priority, shorter period, earlier starting time, or specific formats are transmitted while lower priority, longer period, or later starting time PUCCHs are discarded or delayed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multi-slot PUCCH repetition transmission is implemented to increase coverage, then coverage is improved, but PUCCH collision occurs in the time domain
Solution Approach 1:
The base station pre-configures PUCCH parameters including priority levels, periods, and time domain resources for multiple PUCCHs. The terminal uses these pre-configured parameters to determine transmission priorities before collisions occur, enabling proactive conflict resolution rather than reactive handling
Solution Approach 2:
The patent introduces priority parameters and period parameters as new dimensions for PUCCH configuration. By changing these parameters, the system can dynamically adjust which PUCCH gets transmitted during collisions - higher priority or shorter period PUCCHs are transmitted while lower priority or longer period ones are discarded or delayed
2Adaptability or versatility
If multiple PUCCHs are transmitted in the same slot to carry different uplink control information, then communication flexibility is improved, but time domain collision occurs
Solution Approach 1:
Different PUCCHs are assigned different local qualities in terms of priority levels and period characteristics. When collisions occur, the terminal applies local quality differentiation by selecting which PUCCH to transmit based on its priority and period parameters, rather than treating all PUCCHs equally
Solution Approach 2:
The patent uses parameter changes by introducing priority and period parameters that allow the system to differentiate between multiple PUCCHs. These parameter changes enable the terminal to make intelligent decisions about which PUCCH to transmit when time domain collisions occur
3Reliability
If PUCCH collision resolution rules are established to avoid ambiguity, then communication reliability is improved, but system complexity increases
Solution Approach 1:
The terminal autonomously determines which PUCCH to transmit by comparing pre-configured priority and period parameters without needing complex real-time negotiation with the base station. This self-service approach resolves collisions locally at the terminal, reducing overall system complexity while maintaining reliability
Solution Approach 2:
All the complexity of collision resolution rules is pre-established through base station configuration messages. The terminal simply applies these pre-defined rules during operation without needing to perform complex real-time calculations or negotiations, thereby reducing operational complexity while ensuring reliable collision resolution
Data Source
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AI summary
A PUCCH collision processing method and a terminal are provided, and the method includes: transmitting, in a case that a first PUCCH and a second PUCCH overlap in a first slot, one of the first PUCCH and the second PUCCH within the first slot according to a configuration of at least one of the first PUCCH and the second PUCCH, wherein, the first PUCCH is configured as multi-slot PUCCH repetition transmission, and a carried content in the first PUCCH includes one of Channel State Information CSI and a Scheduling Request SR, the second PUCCH is configured as single-slot or multi-slot PUCCH repetition transmission, and a carried content in the second PUCCH includes one of CSI and an SR; the first slot is one or more slots.