PDCCH Candidate Allocation for Cross-Carrier Scheduling
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Solution Overview
Problem
Current 5G NR systems do not support PDCCH candidate allocation during cross-carrier scheduling in carrier aggregation, which limits the flexible configuration of PDCCH candidates and monitoring parameters across different cells, leading to inefficient resource allocation and increased power consumption.
Innovation Solution
A method for PDCCH candidate allocation in cross-carrier scheduling, where a network-side device determines the PDCCH candidate quantity and monitoring parameters for a first cell based on the configuration of a second cell, using various allocation manners such as equal allocation or factor-based allocation, to optimize resource allocation and reduce unnecessary blind detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If PDCCH candidate allocation is not supported during cross-carrier scheduling in carrier aggregation, then the system structure remains simple, but resource allocation efficiency deteriorates and power consumption increases
Solution Approach 1:
The patent segments the PDCCH candidate allocation by dividing search space sets into first search space sets (for first cells) and second search space sets (for second cells), with distinct PDCCH candidate quantities configured for each type. This segmentation enables efficient resource allocation while maintaining manageable system complexity through structured organization.
Solution Approach 2:
The patent applies local quality by configuring different PDCCH candidate quantities for different search space sets based on their associated cells. Each search space set has customized PDCCH candidate allocation according to its specific requirements, optimizing resource distribution without requiring system-wide complexity changes.
2Use of energy by moving object
If flexible configuration of PDCCH candidates is not supported, then the configuration process remains simple, but power consumption increases due to unnecessary blind detection
Solution Approach 1:
The patent implements dynamic configuration of PDCCH candidate quantities for different search space sets, allowing the system to adapt the number of candidates based on actual scheduling needs. This dynamic adjustment reduces unnecessary blind detection and power consumption while maintaining configuration flexibility through standardized parameters.
Solution Approach 2:
The patent changes the parameter of PDCCH candidate quantity based on the type of search space set and associated cell configuration. By adjusting this key parameter dynamically, the system optimizes power consumption without requiring complex reconfiguration procedures, as changes are made through standardized parameter modifications.
3Productivity
If PDCCH candidate quantity is not allocated for first cells in cross-carrier scheduling, then the monitoring parameter configuration remains simple, but control resource utilization deteriorates
Solution Approach 1:
The patent applies universality by enabling the same configuration framework to handle both first cells and second cells through unified search space set definitions. The PDCCH candidate allocation mechanism works universally across different cell types, improving control resource utilization without requiring separate complex configuration systems.
Solution Approach 2:
The patent introduces a new dimension of configuration by adding PDCCH candidate quantity as a configurable parameter for first cells in cross-carrier scheduling. This dimensional addition enables finer-grained control and better resource utilization while maintaining compatibility with existing configuration structures through standardized parameter extensions.
Data Source
AI summary
A PDCCH candidate allocation method for cross-carrier scheduling and a device are provided. This method includes: when configuration of a first cell includes search space set configuration or PDCCH candidate quantity configuration thereof, determining a PDCCH candidate quantity and/or a monitoring parameter thereof based on the configuration thereof; or when a first cell has no PDCCH configuration and configuration of a second cell includes only PDCCH configuration thereof, determining a PDCCH candidate quantity and/or a monitoring parameter of the first cell based on the PDCCH configuration of the second cell; or when a first cell has no PDCCH configuration and PDCCH configuration of a second cell includes search space set configuration or PDCCH candidate quantity configuration of the first cell, determining a PDCCH candidate quantity and/or a monitoring parameter of the first cell based on the search space set configuration or PDCCH candidate quantity configuration of the first cell.