NR Bandwidth Part Configuration With Unified RB Granularity
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Solution Overview
Problem
The challenge in New Radio (NR) systems is to configure bandwidth parts efficiently to minimize control signaling overhead while ensuring flexibility and reducing device complexity.
Innovation Solution
Configuring bandwidth parts using a unified frequency-domain unit, such as resource blocks (RBs), with a maximum subcarrier spacing, and defining positions relative to synchronization signals or cell carriers to reduce signaling overhead and complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If different resource granularities are used to configure bandwidth parts, then configuration flexibility is improved, but control signaling overhead increases and device complexity increases
Solution Approach 1:
The patent applies homogeneity by using a unified frequency-domain unit (RB) for configuring all bandwidth parts, regardless of their size or position. This standardizes the configuration approach across different bandwidth parts, ensuring consistent control signaling structures while maintaining the ability to configure multiple bandwidth parts with different characteristics. The unified unit eliminates the need for multiple granularity levels, thereby reducing control signaling overhead and device complexity while preserving configuration flexibility through the flexibility of the unified unit itself.
2Measurement precision
If a smaller subcarrier spacing is used for RB configuration, then resource allocation precision is improved, but the number of bits required for bandwidth part configuration increases
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting the subcarrier spacing of the RB based on the bandwidth part configuration requirements. Instead of using a fixed small subcarrier spacing for all cases, the system selects appropriate subcarrier spacing values (e.g., 15kHz, 30kHz, 60kHz) according to the specific bandwidth part being configured. This adaptive parameter selection maintains sufficient resource allocation precision while minimizing the number of bits required to represent the configuration, thereby reducing the overall configuration bit number and control signaling overhead.
3Measurement precision
If terminal searches for system bandwidth position, then bandwidth part position accuracy is improved, but processing complexity and power consumption increase
Solution Approach 1:
The patent applies preliminary action by pre-configuring the position of bandwidth parts relative to the system bandwidth using the unified frequency-domain unit. The network device provides configuration information that directly indicates the position of each bandwidth part in terms of RB units relative to the system bandwidth reference point. This preliminary configuration eliminates the need for the terminal to perform time-consuming searches to determine bandwidth part positions, thereby maintaining position accuracy while significantly reducing processing complexity and power consumption.
Data Source
Figure 1A~1B
Figure 1C
Figure 1D
AI summary
The present invention provides a bandwidth part configuration method, a network device, and a terminal. In one aspect, in an embodiment of the present invention, configuration information is obtained, the configuration information being used for configuring at least one frequency-domain bandwidth configuration, the size and/or the position of a bandwidth part configured by each of the at least one frequency-domain bandwidth configuration being defined by using a same frequency-domain unit as a unit, the frequency-domain unit comprising N resource blocks, and N being an integer greater than or equal to 1; and the configuration information is sent. Because the size and/or the position of a bandwidth part configured by each frequency-domain bandwidth configuration is defined by using a same frequency-domain unit as a unit, the structures of control signaling can be unified compared with a manner in which a bandwidth part is configured by using different resource granularities, thereby effectively ensuring low control signaling overheads and reducing the complexity of a device.