Dynamic Cross-Carrier Scheduling for Wireless Control Signaling
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently managing and switching between self-carrier scheduling and cross-carrier scheduling, leading to suboptimal control signaling throughput and reliability.
Innovation Solution
Implementing dynamic control signaling to activate or deactivate cross-carrier scheduling, along with explicit or implicit indication of search spaces and bandwidth parts for scheduling, to enhance scheduling flexibility and reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If cross-carrier scheduling is used, then control signaling throughput is improved, but system complexity increases
Solution Approach 1:
The patent implements dynamic switching between self-carrier scheduling and cross-carrier scheduling modes based on real-time network conditions and service requirements. The base station can flexibly activate or deactivate cross-carrier scheduling for different cells and carriers, allowing the system to adapt its complexity level to match the current productivity needs without permanently increasing system complexity.
Solution Approach 2:
The patent divides the scheduling system into independent schedulable units where different cells and carriers can operate in different scheduling modes simultaneously. This segmentation allows cross-carrier scheduling to be applied only where needed (improving throughput) while other parts of the system continue using simpler self-carrier scheduling, thereby managing overall system complexity.
2Device complexity
If self-carrier scheduling is used, then system complexity is reduced, but control signaling reliability deteriorates
Solution Approach 1:
The patent introduces cross-carrier scheduling as an intermediary mechanism that allows control signaling for one carrier to be transmitted through another carrier. This mediator approach improves control signaling reliability by providing alternative transmission paths and redundancy, while the system maintains manageable complexity through selective activation only when reliability improvements are needed.
Solution Approach 2:
The patent changes the scheduling mode parameter dynamically based on network conditions, service types, and reliability requirements. By adjusting this parameter, the system can switch between simplicity-oriented self-carrier scheduling and reliability-oriented cross-carrier scheduling, optimizing the trade-off between complexity and reliability for different operational scenarios.
3Adaptability or versatility
If dynamic switching between scheduling modes is implemented, then scheduling flexibility is improved, but control signaling overhead increases
Solution Approach 1:
The patent applies different scheduling modes to different local contexts (cells, carriers, or user equipment) based on their specific requirements rather than uniformly across the entire system. This localized approach provides scheduling flexibility where needed while avoiding unnecessary control signaling overhead in areas where simple self-carrier scheduling suffices, thus managing the trade-off between adaptability and overhead.
Data Source
AI summary
Control information may be used to schedule communications between a wireless device and a base station. The wireless device may monitor control channels associated with one or more cells to receive the control information.