Cross-Carrier Scheduling Between Secondary and Primary Cells
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Solution Overview
Problem
Existing wireless communication systems face inefficiencies in cross-carrier scheduling between secondary and primary cells, leading to increased complexity and resource utilization challenges without adequate solutions.
Innovation Solution
Implementing a shared search space monitoring configuration for a user equipment (UE) to monitor both primary and secondary cells, allowing for efficient cross-carrier scheduling by identifying control information and adhering to scheduling constraints, thereby optimizing communications efficiency and resource utilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the UE monitors search spaces on both primary cell and secondary cell for cross-carrier scheduling, then communication efficiency is improved, but device complexity increases
Solution Approach 1:
The patent segments the monitoring configuration into separate components: a first monitoring configuration for the primary cell and a second monitoring configuration for the secondary cell. Each configuration independently defines search space sets and control resource sets, allowing the UE to process scheduling information from different cells separately rather than as a monolithic complex structure.
Solution Approach 2:
The patent introduces a cross-carrier dimension to the scheduling architecture. The secondary cell's search space is configured to carry scheduling information for the primary cell, adding a cross-cell dimension that enables more flexible resource allocation while distributing monitoring tasks across multiple cells rather than concentrating all monitoring on a single cell.
2Productivity
If cross-carrier scheduling is implemented from secondary cell to primary cell, then resource utilization is optimized, but scheduling complexity increases
Solution Approach 1:
The monitoring configuration is segmented into distinct parameters for each cell: first search space set group, first control resource set, second search space set group, and second control resource set. This segmentation allows independent optimization of scheduling parameters for each cell while maintaining clear boundaries between their functions.
Solution Approach 2:
The patent enables dynamic switching between different monitoring configurations based on scheduling needs. The UE can adaptively adjust which search space and control resource set to use depending on whether scheduling information originates from the primary or secondary cell, providing flexibility in resource allocation without requiring static complex configurations.
Data Source
AI summary
Methods, systems, and devices for wireless communications are described. A user equipment (UE) may be configured to monitor search spaces on a primary cell and an secondary cell in a carrier aggregation configuration. The UE may monitor the search spaces for control information according to a shared search space monitoring configuration. Based on the shared search space monitoring configuration, the UE may identify that the secondary cell is a scheduling cell and the primary cell is a scheduled cell (e.g., cross-carrier scheduling). The UE may monitor control channel candidates of search spaces on the primary cell and on the secondary cell for downlink control information messages scheduling data transmissions with the primary cell. In some examples, the cross-carrier scheduled communications may be configured according to a scheduling configuration, which may include one or more scheduling constraints.