PUCCH Repetition Control Linked to PDCCH Scheduling
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Solution Overview
Problem
Existing wireless communication systems face inefficiencies in resource utilization and increased latency due to the lack of dynamic indication of PUCCH repetition factors, leading to increased signaling overhead and system latency.
Innovation Solution
Dynamically indicating PUCCH repetition factors based on PDCCH or DCI, correlating channel conditions for scheduling repeated PDSCH with PUCCH repetition, allowing for efficient resource use and reduced latency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If PUCCH repetition factors are statically configured, then signaling overhead is reduced, but resource utilization efficiency deteriorates
Solution Approach 1:
The patent applies dynamics by enabling the PUCCH repetition factor to be dynamically adjusted based on PDCCH repetition configurations. The network can indicate different repetition factors through DCI formats, allowing the system to adapt to varying channel conditions and traffic requirements in real-time, thus improving resource utilization efficiency while maintaining manageable signaling overhead through standardized indication mechanisms.
2Productivity
If PUCCH repetition factors are dynamically indicated, then resource utilization efficiency is improved, but signaling overhead increases
Solution Approach 1:
The patent applies universality by designing the DCI format to serve multiple functions: it not only schedules PDSCH transmissions but also indicates PUCCH repetition factors. The same DCI structure is used for both downlink scheduling and uplink repetition configuration, eliminating the need for separate dedicated signaling messages and thus reducing the overall signaling overhead while enabling dynamic adaptation.
Solution Approach 2:
The patent merges the PUCCH repetition factor indication with the existing PDCCH scheduling functionality. By combining these two functions into a single DCI message, the patent avoids adding separate signaling overhead for repetition factor indication, thereby improving resource utilization efficiency without proportionally increasing signaling overhead.
3Reliability
If PUCCH repetition is increased for coverage enhancement, then transmission reliability is improved, but system latency increases
Solution Approach 1:
The patent applies dynamics by enabling flexible adjustment of PUCCH repetition factors based on actual channel conditions and coverage requirements. The network can dynamically indicate higher repetition factors for UEs in poor coverage conditions to improve reliability, while allowing lower repetition factors for UEs with good coverage, thus minimizing unnecessary latency for devices that don't require extensive repetition.
4Device complexity
If PUCCH repetition factors are fixed, then device complexity is reduced, but adaptability to channel conditions deteriorates
Solution Approach 1:
The patent applies self-service by enabling the UE to automatically adjust its PUCCH repetition behavior based on received PDCCH configurations. The UE monitors DCI formats and autonomously configures its PUCCH transmissions according to the indicated repetition factors, eliminating the need for complex higher-layer configuration procedures while maintaining high adaptability to varying channel conditions.
Data Source
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AI summary
Aspects described herein relate to repetitions of uplink transmissions. In an example, a network entity may transmit, to a user equipment (UE), an indication of repetitive scheduling of a downlink control channel, wherein the indication triggers a correspondence between the repetitive scheduling of the downlink control channel and one or more repetition factors for an uplink control channel, each of the one or more repetition factors corresponding to a repetition count for uplink control messages on the uplink control channel; and receive, from the UE on the uplink control channel, repetitions of an uplink control message according to a first repetition factor of the one or more repetition factors for the uplink control channel.