Bandwidth Part Mapping for Signaling Overhead Reduction
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Solution Overview
Problem
In next-generation communications systems, such as the New Radio (NR) system, determining and indicating a bandwidth part for user equipment (UE) is challenging due to the introduction of multiple subcarrier spacings, which complicates resource configuration and signaling overhead, especially when different UEs support different or the same subcarrier spacings within a carrier bandwidth.
Innovation Solution
A method where a base station pre-configures mapping relationships between carrier bandwidths and subcarrier spacings, allowing it to determine and configure appropriate subcarrier spacings for resource configuration, and pre-configures mapping relationships between carrier bandwidths and bandwidth part sets or capability bandwidths of terminal devices to adaptively select a bandwidth part based on actual requirements, reducing signaling overhead and improving flexibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple subcarrier spacings are introduced to support diverse scenarios and services, then system adaptability is improved, but resource configuration complexity and signaling overhead increase
Solution Approach 1:
The patent applies parameter changes by introducing multiple subcarrier spacings (15kHz, 30kHz, 60kHz) to support different scenarios and services. The base station dynamically selects appropriate subcarrier spacing parameters based on carrier bandwidth and service requirements, enabling the system to adapt to diverse communication scenarios while managing complexity through standardized parameter sets
Solution Approach 2:
The patent segments the carrier bandwidth into multiple bandwidth parts (BWP), where each BWP can be configured with different subcarrier spacings. This segmentation allows different portions of the spectrum to serve different purposes with optimized parameters, improving system adaptability while maintaining manageable configuration complexity through modular BWP management
2Adaptability or versatility
If multiple subcarrier spacings are introduced to support diverse scenarios and services, then system adaptability is improved, but signaling overhead increases
Solution Approach 1:
The patent implements universality by designing bandwidth parts that can universally support multiple subcarrier spacings within a single carrier. The BWP configuration framework provides a multi-functional structure that can accommodate different subcarrier spacing requirements without requiring separate signaling for each scenario, thereby reducing overall signaling overhead while maintaining system adaptability
3Adaptability or versatility
If a base station configures resources for terminal devices with different subcarrier spacings, then system flexibility is improved, but determination complexity increases
Solution Approach 1:
The patent applies preliminary action by pre-configuring multiple bandwidth parts with different subcarrier spacings before actual data transmission. The base station prepares a set of BWPs in advance, and terminal devices can be quickly switched between predefined BWPs based on service requirements, reducing the real-time determination complexity while maintaining system flexibility
Data Source
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AI summary
This application discloses a resource configuration method, a method for determining a bandwidth part, a method for indicating a bandwidth part, and a device. The method includes: determining, by a base station, the bandwidth part based on a mapping relationship between a first carrier bandwidth and a first bandwidth part set and/or a mapping relationship between a capability bandwidth of a terminal device and a second bandwidth part set, where the first bandwidth part set includes a plurality of bandwidth parts, the first bandwidth part set includes the bandwidth part, the second bandwidth part set includes a plurality of bandwidth parts, and the second bandwidth part set includes the bandwidth part; and indicating, by the base station, the bandwidth part to the terminal device.