Primary Cell Scheduling via Secondary Cell in Carrier Aggregation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently managing carrier aggregation, particularly in scheduling a primary cell from a secondary cell, which affects data rates and network performance.
Innovation Solution
The implementation of advanced scheduling mechanisms within the wireless device and base stations to optimize carrier aggregation, including dynamic bandwidth part adaptation and switching, and efficient resource allocation across primary and secondary cells.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If carrier aggregation is implemented to increase data rates, then network performance improves, but device complexity and scheduling difficulty increase
Solution Approach 1:
The patent segments the carrier aggregation scheduling into independent components: a first cell (primary cell) handles control signaling and scheduling decisions, while second cells (secondary cells) execute data transmission. This segmentation allows complex carrier aggregation to be managed through simpler, cell-specific operations, reducing overall scheduling complexity while maintaining high data rates through multiple aggregated carriers
Solution Approach 2:
The first cell acts as an intermediary that coordinates scheduling between the network and multiple second cells. It generates scheduling decisions that are then applied across aggregated carriers, mediating the complexity of managing multiple cells simultaneously while enabling high throughput through coordinated resource allocation across all cells
2Productivity
If dynamic bandwidth part adaptation is implemented to optimize resource allocation, then network performance improves, but processing complexity increases
Solution Approach 1:
The patent implements dynamic bandwidth part adaptation where the first cell can adjust its bandwidth and resource allocation in real-time based on traffic conditions and user requirements. This dynamic adjustment allows the system to optimize network performance for varying loads while the standardized adaptation mechanism keeps processing complexity manageable through reusable algorithms
3Productivity
If cross-carrier scheduling is implemented to improve resource utilization, then data transmission efficiency improves, but scheduling overhead increases
Solution Approach 1:
The first cell is designed with universal scheduling capability that can allocate resources across multiple second cells simultaneously. This multi-functional approach allows a single scheduling entity to manage resources on multiple carriers, improving overall resource utilization while reducing the need for separate scheduling procedures for each cell, thereby minimizing scheduling overhead
Data Source
AI summary
A base station may transmit a first configuration parameter of a primary cell indicating that a first secondary cell is a scheduling cell for the primary cell. Based on the first secondary cell being deactivated, the base station may transmit a first DCI based on one or more first search spaces of the primary cell and may transmit or receive a first TB via the primary cell based on the first DCI. Based on the first secondary cell being activated, the base station may transmit a second DCI based on one or more second search spaces of the first secondary cell and may transmit or receive a second TB via the primary cell based on the second DCI.