PDCCH Candidate Configuration for Cross-Carrier Multi-Cell Scheduling
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently managing uplink and downlink transmissions due to increased data traffic, the need for higher transmission rates, and the accommodation of a large number of connected devices, while also requiring low latency and high energy efficiency.
Innovation Solution
A method and apparatus for uplink or downlink transmission/reception in a wireless communication system that involves monitoring a physical downlink control channel (PDCCH) for scheduling data across multiple cells using cross-carrier scheduling, configuring PDCCH candidates based on the number of candidates per aggregation level in each cell, and utilizing DCI for efficient data transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If cross-carrier scheduling is implemented to schedule data across multiple cells through a single DCI, then data transmission efficiency is improved and resource utilization is optimized, but the complexity of PDCCH candidate configuration and monitoring increases
Solution Approach 1:
The patent applies universality by enabling a single DCI to schedule data across multiple cells (multi-functionality), where the PDCCH in one cell can serve multiple scheduled cells. This allows one control channel to perform multiple scheduling functions, improving transmission efficiency while managing complexity through standardized configuration procedures.
Solution Approach 2:
The patent employs parameter changes by dynamically configuring the number of PDCCH candidates based on aggregation levels and cell-specific parameters. The system adjusts these parameters to optimize the balance between scheduling capability and detection complexity, allowing flexible adaptation to different cross-carrier scheduling scenarios.
2Adaptability or versatility
If the number of PDCCH candidates per aggregation level is increased to improve scheduling flexibility across multiple cells, then scheduling capability is enhanced, but the processing complexity and detection difficulty at the UE increases
Solution Approach 1:
The patent applies dynamics by making the number of PDCCH candidates configurable and adaptable based on scheduling requirements. The system can dynamically adjust the number of candidates per aggregation level according to the specific cross-carrier scheduling scenario, balancing flexibility needs against detection complexity in real-time.
Solution Approach 2:
The patent segments the PDCCH monitoring process by organizing candidates into different aggregation levels (AL0, AL1, AL2, AL3). This segmentation allows the UE to detect PDCCH candidates in a structured manner across different reliability requirements, making the overall detection process more manageable despite the increased total number of candidates.
3Quantity of substance
If cross-carrier scheduling is used to accommodate explosive data traffic and increase transmission rate per user, then data capacity is improved, but the latency in monitoring and processing multiple cells may increase
Solution Approach 1:
The patent merges the scheduling function across multiple cells by using a single DCI to schedule data in multiple cells simultaneously. This consolidation reduces the number of separate scheduling operations needed, thereby reducing overall latency while accommodating explosive data traffic across the aggregated cells.
Data Source
AI summary
Disclosed are a method and device for uplink transmission or downlink reception in a wireless communication system. A method for a terminal to perform uplink transmission or downlink reception according to an embodiment of the present disclosure comprises the steps of: monitoring a PDCCH in a search space set configured for a first cell, the PDCCH including first DCI for scheduling the uplink transmission or the downlink reception in at least one among the first cell or a second cell; and performing the uplink transmission or the downlink reception in at least one among the first cell or the second cell on the basis of the first DCI.