PDCCH Candidate Unlinking for Reference Selection in Wireless Systems
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Solution Overview
Problem
In wireless communications systems featuring PDCCH repetition, the dropping of PDCCH candidates due to resource conflicts leads to ambiguity between the UE and the BS regarding the reference PDCCH candidate, potentially resulting in different communication timelines and reduced communication efficiency.
Innovation Solution
The UE and the BS employ a mutually understood reference selection rule to select a reference PDCCH candidate for the set of linked PDCCH candidates, even if one or more candidates are dropped, thereby maintaining synchronization and consistency in communication timelines.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If PDCCH repetition is used to enhance reliability, then communication reliability is improved, but ambiguity in reference PDCCH candidate selection arises when candidates are dropped due to resource conflicts
Solution Approach 1:
The patent applies preliminary action by pre-establishing a reference selection rule before PDCCH candidate dropping occurs. The rule specifies that when PDCCH candidates are dropped due to resource conflicts, the UE and BS can still mutually determine the reference candidate based on predetermined criteria, preventing ambiguity before it affects communication reliability.
2Productivity
If PDCCH candidates are dropped due to resource conflicts, then resource efficiency is improved, but communication timeline synchronization between UE and BS deteriorates
Solution Approach 1:
The patent implements feedback mechanisms where the UE and BS continuously monitor and adjust their reference PDCCH candidate selections based on resource conflict conditions. This feedback ensures that even when candidates are dropped for resource efficiency, both sides maintain synchronized communication timelines through coordinated reference selection.
3Productivity
If linked PDCCH candidates are monitored to improve data rates, then spectral efficiency is improved, but complexity in handling candidate dropping and reference selection increases
Solution Approach 1:
The patent applies segmentation by dividing the PDCCH candidate management process into distinct segments: identifying linked candidates, detecting resource conflicts, determining dropped candidates, and selecting references. This segmentation reduces the complexity of handling multiple candidates by processing each aspect separately through predefined rules.
Data Source
AI summary
This disclosure provides systems, methods and apparatus, including computer programs encoded on computer storage media, for maintaining, between a user equipment (UE) and a component of a base station (BS), a mutual understanding of a set of linked physical downlink control channel (PDCCH) candidates if the UE selects to monitor a subset of the linked PDCCH candidates. In one aspect, the UE may monitor the subset of the linked PDCCH candidates, and the UE and the component of the BS may select a reference PDCCH candidate from which to define scheduling information in accordance with the UE monitoring the subset of the linked PDCCH candidates. In some examples, the UE and the component of the BS may select the reference PDCCH candidate in accordance with one or more mutually understood rules or procedures such that the UE and the component of the BS may select a same reference PDCCH candidate.