Carrier Aggregation Mixed Numerologies Scheduling
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Solution Overview
Problem
Current wireless communication systems, particularly in 5G networks, face challenges in efficiently managing carrier aggregation with different numerologies, which affects the scheduling and feedback mechanisms across component carriers, leading to suboptimal performance in handling diverse transmission time intervals and quality of service requirements for various wireless communication services.
Innovation Solution
The method involves scheduling downlink transmissions and receiving uplink control information across component carriers with different numerologies, allowing for cross-carrier scheduling and feedback handling to accommodate diverse numerologies, ensuring efficient communication and quality of service for services like eMBB, mMTC, and URLLC by aligning timing and resource allocation across carriers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If carrier aggregation with different numerologies is implemented, then spectral efficiency and service diversity are improved, but scheduling complexity and feedback management difficulty increase
Solution Approach 1:
The patent segments the carrier aggregation system into multiple scheduling entities, where each component carrier can be independently scheduled. The feedback management is divided into separate feedback processes for each numerology type, allowing independent optimization of scheduling algorithms for each carrier group without affecting others.
Solution Approach 2:
The patent implements dynamic scheduling configurations that adapt to different numerology requirements. The base station can dynamically adjust scheduling parameters, feedback timing, and resource allocation based on the specific numerology of each component carrier, enabling flexible management of heterogeneous carriers with varying transmission time intervals.
2Adaptability or versatility
If different transmission time intervals are used across component carriers, then quality of service for diverse services is improved, but feedback timing alignment and resource allocation complexity increase
Solution Approach 1:
The patent applies local quality by allowing each component carrier to have its own feedback timing configuration tailored to its specific numerology and service requirements. Instead of enforcing a uniform feedback timing across all carriers, each carrier can have optimized feedback intervals that match its transmission time interval, enabling service-specific QoS management.
Solution Approach 2:
The patent introduces an additional dimension in feedback management by implementing feedback timing that operates independently for each numerology group. This multi-dimensional feedback structure allows simultaneous support of different transmission time intervals without requiring complex cross-carrier timing alignment, as each dimension (numerology group) has its own timing reference.
3Adaptability or versatility
If cross-carrier scheduling is implemented for mixed numerologies, then resource allocation flexibility is improved, but control signal overhead and processing complexity increase
Solution Approach 1:
The patent implements universal scheduling structures that can function across different numerologies. The cross-carrier scheduling mechanism uses a unified control format that can accommodate multiple numerology types, reducing the need for separate control signaling for each carrier type and minimizing control overhead while maintaining flexibility.
Data Source
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AI summary
Certain aspects of the present disclosure relate to methods and apparatus for handling carrier aggregation (CA) involving component carriers (CCs) having different numerologies.