5G NR Bandwidth Part Segmentation for Spectrum Efficiency
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Solution Overview
Problem
In the 5G NR communications system, terminal devices often lack the bandwidth capability to support wide bandwidth carriers, necessitating the configuration of bandwidth parts (BWP) by base stations, but existing methods struggle with efficient communication across multiple segments of contiguous frequency domain resources.
Innovation Solution
A communication method where terminal devices receive information to identify specific frequency domain resources, allowing them to communicate with network devices on either a single contiguous or multiple contiguous frequency domain resources based on their status, enhancing spectrum usage efficiency by activating or deactivating BWPs as needed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the base station configures multiple bandwidth parts (BWPs) for the terminal device to enable communication on multiple segments of contiguous frequency domain resources, then the spectrum usage efficiency is improved, but the device complexity increases
Solution Approach 1:
The frequency domain resources are divided into multiple segments of contiguous resources, with each segment identified by a first frequency domain resource indicator. The terminal device can be configured with multiple bandwidth parts (BWPs), where each BWP corresponds to a segment, enabling communication across dispersed spectrum segments while maintaining manageable complexity through structured segmentation
Solution Approach 2:
The terminal device dynamically switches between different communication modes based on its status: in the first state, it communicates on multiple segments using the first frequency domain resource indicator; in the second state, it communicates on a single segment using the second frequency domain resource indicator. This dynamic adaptation allows the system to optimize spectrum usage while adjusting to terminal capabilities
2Productivity
If the terminal device communicates on multiple segments of contiguous frequency domain resources, then the data transmission efficiency is improved, but the terminal device's bandwidth capability requirement increases
Solution Approach 1:
Instead of requiring the terminal to handle a single wide contiguous bandwidth, the system segments the frequency domain resources into multiple smaller contiguous segments. The terminal processes each segment separately through configured BWPs, reducing the instantaneous bandwidth processing requirement while achieving efficient utilization of dispersed spectrum resources
Solution Approach 2:
The system dynamically adapts to terminal bandwidth capabilities by allowing the terminal to operate in different states. When the terminal cannot support wide bandwidth, it operates in the second state using a single segment (second frequency domain resource indicator). When capable, it can utilize multiple segments (first frequency domain resource indicator), providing flexible adaptation to varying terminal capabilities
3Device complexity
If the base station uses a single contiguous frequency domain resource for communication, then the device complexity is reduced, but the spectrum usage efficiency deteriorates
Solution Approach 1:
The system segments dispersed frequency domain resources into multiple contiguous segments, each managed as a separate BWP. This allows the base station to efficiently utilize non-contiguous spectrum by treating each segment independently while maintaining overall spectrum usage efficiency
Solution Approach 2:
The same frequency domain resource indicator mechanism is used universally for both single-segment and multi-segment communication scenarios. The system can flexibly switch between communicating on one contiguous resource or multiple dispersed segments using the same underlying BWP configuration approach, providing multi-functionality without increasing complexity
Data Source
AI summary
Example communication methods and a communications apparatus are described. One example method includes receiving first information by a terminal device, where the first information indicates an identifier of a first frequency domain resource, and the first frequency domain resource is contiguous in frequency domain. When a status of the terminal device is a first state, the terminal device with a network device on a second frequency domain resource based on the first information, where the second frequency domain resource includes a plurality of segments of contiguous frequency domain resources, and the first frequency domain resource is one segment of the plurality of segments of contiguous frequency domain resources. According to the foregoing method, the terminal device may communicate, based on the received first information, with the network device on the second frequency domain resource when the status of the terminal device is the first state.