Initial BWP Configuration for Mixed-Bandwidth NR Terminals
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Solution Overview
Problem
The NR system faces challenges in accommodating terminal devices with diverse bandwidth capabilities, as some devices require narrow bandwidth due to design constraints, leading to inefficiencies in access and resource utilization.
Innovation Solution
A method and apparatus for determining an initial downlink bandwidth part (BWP) that configures frequency resources differently for terminal devices with varying capabilities, reducing system bandwidth requirements and optimizing access performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a unified broadband initial BWP is configured for all terminal devices, then system bandwidth utilization is maximized, but terminal devices with narrow bandwidth capabilities cannot access the system
Solution Approach 1:
The initial BWP is segmented into multiple types (first-type and second-type) with different frequency resource configurations. Terminal devices select the appropriate BWP type based on their bandwidth capabilities, enabling narrowband devices to access the system while broadband devices can utilize wider bandwidths.
Solution Approach 2:
The initial BWP configuration is made dynamic by introducing multiple BWP types that can be selectively activated. The network device can dynamically indicate which BWP type to use through signaling, allowing the system to adapt to different terminal capabilities and service requirements.
2Reliability
If separate initial BWP configurations are provided for different terminal types, then access performance of narrowband devices is improved, but control information overhead increases
Solution Approach 1:
The second initial BWP configuration serves multiple purposes: it acts as the default configuration for second-type terminal devices and also provides a reference for first-type terminal devices to determine their frequency resources. This multi-functionality reduces the need for separate dedicated configurations.
Solution Approach 2:
The second initial BWP configuration acts as an intermediary reference that enables first-type terminal devices to derive their frequency resources. Instead of providing completely separate configurations, the system uses the second BWP as a baseline and applies offsets to generate the first BWP configuration.
3Quantity of substance
If the frequency resource of the first initial BWP is included in the second initial BWP, then system bandwidth requirements are reduced, but frequency resource allocation complexity increases
Solution Approach 1:
The frequency resources of the first initial BWP are nested within the frequency resources of the second initial BWP. This nesting relationship allows narrowband devices to operate within a subset of the total system bandwidth, reducing the overall bandwidth requirement while maintaining a unified resource pool management structure.
Data Source
AI summary
The present disclosure relates to methods and apparatuses for determining an initial bandwidth part (BWP). One example method includes determining a frequency resource of a first initial BWP, where the frequency resource of the first initial BWP is included in a frequency resource of a second initial BWP, the frequency resource of the first initial BWP corresponds to a first-type terminal device, the frequency resource of the second initial BWP corresponds to a second-type terminal device, and the terminal devices of two types have different capabilities.