Virtual BWP Frequency Hopping for NR-Light UEs
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Solution Overview
Problem
Current wireless communication technologies, such as LTE and NR, face limitations in spectral efficiency and resource allocation, particularly for NR-Light UEs, which have reduced bandwidth and computational complexity, leading to inefficient resource sharing and increased scheduling complexity due to restricted frequency hopping within narrow bandwidth parts (BWP) boundaries.
Innovation Solution
The introduction of a virtual BWP with the same subcarrier spacing as the narrow BWP but a larger bandwidth, allowing for frequency hopping across BWP boundaries, enabling NR-Light UEs to align with NR Premium UEs' resource use by expanding the virtual BWP boundaries for efficient resource allocation and reducing power and processing waste.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If frequency hopping is restricted within narrow BWP boundaries, then device complexity is reduced, but spectral efficiency deteriorates
Solution Approach 1:
The patent introduces a virtual BWP that segments the frequency hopping space into multiple narrow BWPs within a larger virtual bandwidth. This allows frequency hopping to occur across multiple narrow BWP segments while maintaining the simplicity of narrow BWP operations, thereby resolving the contradiction between device complexity and spectral efficiency
Solution Approach 2:
The patent adds a virtual dimension by introducing a virtual BWP that encompasses multiple narrow BWPs. Frequency hopping occurs in this virtual dimension rather than being constrained to individual narrow BWP boundaries, enabling improved spectral efficiency without increasing device complexity
2Device complexity
If frequency hopping is restricted within narrow BWP boundaries, then resource allocation is simplified, but resource utilization deteriorates
Solution Approach 1:
The virtual BWP serves multiple functions: it provides a unified resource allocation framework for simplified scheduling while enabling efficient resource utilization across multiple narrow BWPs. This multi-functional approach resolves the contradiction between resource allocation simplicity and resource utilization efficiency
3Device complexity
If NR-Light UEs use reduced bandwidth, then device complexity is reduced, but spectral efficiency deteriorates
Solution Approach 1:
The virtual BWP segments the available bandwidth into multiple narrow BWP regions that NR-Light UEs can operate within. This segmentation allows reduced bandwidth operation while enabling frequency hopping across segments to achieve improved spectral efficiency without increasing device complexity
Data Source
AI summary
Various aspects of the present disclosure generally relate to frequency hopping within a virtual BWP. In some aspects, a UE may determine a virtual bandwidth part (BWP) in which to frequency hop from a first narrow BWP to a second narrow BWP by a frequency offset. The virtual BWP may have a same subcarrier spacing as the first narrow BWP and a larger bandwidth than the first narrow BWP. The UE may perform communication based at least in part on frequency hopping within the virtual BWP. Numerous other aspects are provided.