Per-BWP Frequency Hopping for Narrowband Interference Mitigation
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Solution Overview
Problem
Existing wireless communication technologies, such as NR and LTE, face challenges in maintaining communication efficiency while operating in narrow bandwidths due to limited frequency diversity and increased power consumption from rapid RF switching, especially in scenarios involving frequency-selective interference.
Innovation Solution
Implementing per-BWP frequency hopping techniques that configure frequency locations based on a reference point, allowing for efficient frequency diversity within narrow bandwidths by dynamically changing the BWP frequency location, while maintaining communication efficiency through mechanisms like cross-hop scheduling and beamforming.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If frequency hopping is implemented in narrow bandwidth, then frequency diversity is improved, but power consumption increases due to rapid RF switching
Solution Approach 1:
The patent implements dynamic BWP switching combined with frequency hopping, where the network entity configures multiple BWPs with different frequency locations and dynamically switches between them based on channel conditions. This dynamic approach allows the system to achieve frequency diversity by hopping across different frequency locations while managing RF switching more efficiently through structured BWP configurations rather than arbitrary frequency changes.
2Reliability
If BWP switching is performed rapidly to achieve frequency diversity, then communication reliability is improved, but system complexity increases
Solution Approach 1:
The patent segments the available bandwidth into multiple BWPs (Bandwidth Parts), each with specific frequency locations and configurations. This segmentation allows the system to manage frequency hopping by switching between predefined BWP segments rather than managing continuous frequency changes. The network entity configures multiple BWPs with parameters including frequency locations, subcarrier spacings, and cyclic prefix types, creating a structured approach that reduces system complexity while maintaining frequency diversity.
Solution Approach 2:
The network entity performs preliminary configuration of multiple BWPs before frequency hopping is executed. The configuration includes pre-defining frequency locations, bandwidth sizes, and other parameters for each BWP. This preliminary action allows the UE to prepare for upcoming BWP switches, reducing the complexity of real-time frequency management and enabling smoother transitions between frequency locations.
3Reliability
If multiple BWPs are configured for frequency hopping, then frequency diversity is enhanced, but configuration complexity increases
Solution Approach 1:
The patent creates a universal BWP configuration framework where a set of BWPs can be configured with standardized parameters and switching rules that apply across different frequency hopping scenarios. The network entity configures multiple BWPs that can serve multiple purposes: frequency diversity through hopping, power saving through selective activation, and adaptive modulation through different subcarrier spacings. This multi-functional approach reduces configuration complexity by using a unified configuration mechanism rather than separate configurations for each function.
Data Source
AI summary
Certain aspects of the subject matter described in this disclosure can be implemented in a method for wireless communication by a user equipment (UE). The method generally includes receiving, from a network entity, a configuration for a first bandwidth part (BWP) configured with frequency hopping, determining a frequency location of the first BWP during each of a plurality of frequency hops for the frequency hopping based on a reference frequency location, and communicating with the network entity via the first BWP and in accordance with the configuration.