Reference Control Channel Candidate for PUCCH Allocation
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Solution Overview
Problem
In multi-antenna systems, ensuring consistent information transmission and PUCCH resource allocation across multiple transmissions through multi-TRP/multi-panel configurations is challenging, particularly in scenarios requiring robustness and high spectrum efficiency, such as 5G NR systems.
Innovation Solution
A method where a first control channel candidate and a second control channel candidate are used to schedule a shared Transport Block or Code Block Group, with signaling indicating a target index to determine the radio resource group, ensuring consistent PUCCH resource allocation by determining a reference control channel candidate based on the size relation between the candidates' values.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multi-TRP/multi-panel transmission is used to enhance robustness, then transmission reliability is improved, but PUCCH resource allocation consistency deteriorates
Solution Approach 1:
The patent changes the parameter selection criteria by introducing a reference control channel candidate determination mechanism. Instead of directly using control channel candidates from multiple TRPs, the system selects a reference candidate based on specific parameters (search space set index, control resource set index, aggregation level) and uses this reference to determine consistent PUCCH resources across all TRPs, thereby maintaining resource allocation consistency while enabling multi-TRP transmission.
2Adaptability or versatility
If multiple control channel candidates are used for scheduling, then transmission diversity is improved, but resource allocation complexity increases
Solution Approach 1:
The patent introduces a reference control channel candidate as an intermediary element. This reference candidate acts as a mediator between multiple control channel candidates and the PUCCH resource allocation mechanism. By using this intermediary, the system can maintain transmission diversity through multiple candidates while simplifying resource allocation through a unified reference-based approach, thereby reducing overall system complexity.
3Adaptability or versatility
If control channel candidates from different search space sets are considered, then scheduling flexibility is improved, but determining consistent PUCCH resources becomes more difficult
Solution Approach 1:
The patent performs preliminary action by pre-determining a reference control channel candidate from among multiple candidates across different search space sets before PUCCH resource allocation. This reference candidate is selected based on predefined criteria involving search space set indices, control resource set indices, and aggregation levels. By establishing this reference in advance, the system maintains scheduling flexibility while simplifying the subsequent PUCCH resource determination process, as all resources can be consistently derived from this pre-selected reference.
Data Source
AI summary
The present application provides a method and device in a node for wireless communications. A first node receives a first information block; receives a first signaling; transmits a first bit block in a first radio resource group; the first signaling occupies a first control channel candidate, and the first control channel candidate is associated with a second control channel candidate; the first control channel candidate corresponds to a first value, the second control channel candidate corresponds to a second value, a reference control channel candidate is determined according to a size relation between the first value and the second value, and the reference control channel candidate is the first control channel candidate or the second control channel candidate; the reference control channel is used to determine a first parameter, the first signaling is used to indicate a first index.