Wireless Scheduling via UE Capability Tables
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Solution Overview
Problem
Conventional wireless communication systems, particularly in New Radio (NR) systems, face challenges in efficiently scheduling user equipment (UE) resources due to varying UE capabilities, leading to suboptimal utilization of system resources and increased signaling overhead.
Innovation Solution
The system allows UE to semi-statically indicate its capabilities to the base station through a capability table, enabling dynamic resource allocation based on UE capabilities, and uses a low-signaling overhead mechanism for updating changes in capabilities, ensuring resources are granted only when the UE can effectively utilize them.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the base station uses flexible scheduling to support varying UE capabilities, then the adaptability of the system is improved, but the signaling overhead increases
Solution Approach 1:
The UE capabilities are segmented into multiple capability tables, where each table corresponds to specific grant characteristics (e.g., grant type, time domain parameters, frequency domain parameters). This segmentation allows the base station to efficiently query only the relevant capability table for the current scheduling scenario, reducing the amount of signaling required compared to transmitting all possible capability information.
Solution Approach 2:
The UE pre-configures and transmits multiple capability tables to the base station in advance, covering various grant characteristics and scenarios. This preliminary action enables the base station to perform efficient lookups during scheduling decisions without requiring extensive real-time signaling exchanges, thereby reducing signaling overhead while maintaining scheduling flexibility.
2Productivity
If the base station allocates resources without considering UE capabilities, then the scheduling speed is improved, but the resource utilization efficiency deteriorates
Solution Approach 1:
The system enables self-service scheduling where the base station autonomously determines UE capabilities by querying the pre-configured capability tables based on grant characteristics, without requiring additional real-time capability reporting from the UE. This self-service mechanism maintains high scheduling speed while ensuring resource allocation is optimized for each UE's actual capabilities, preventing resource waste.
3Measurement precision
If the UE transmits detailed capability information dynamically, then the scheduling accuracy is improved, but the signaling overhead increases
Solution Approach 1:
Instead of transmitting uniform detailed capability information for all scenarios, the UE provides localized capability information through separate capability tables tailored to specific grant characteristics. Each capability table contains precision-optimized parameters relevant to that particular grant type or scenario, achieving high scheduling accuracy while minimizing the total signaling overhead compared to transmitting all possible capability details in every update.
Data Source
AI summary
Methods, systems, and devices for wireless communication are described for improved scheduling and/or scheduling configuration. A base station may receive, from a user equipment (UE), an indication of one or more UE capabilities. The base station may determine, based on the one or more UE capabilities, when a grant to be transmitted is usable by the UE. The base station may transmit the grant to the UE, the grant including an assignment of resources based on when the grant is usable. In some examples, a UE may identify one or more UE capabilities in association with different grant characteristics and transmit, to a base station, an indication of the one or more UE capabilities. The UE may receive, from the base station, a grant having one of the different grant characteristics and including an assignment of resources, the assignment of resources based on the one or more UE capabilities.