NB-IoT and 5G NR Spectrum Partitioning With UL Blanking
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Solution Overview
Problem
The challenge in current wireless telecommunication systems is the interference between narrowband-Internet of Things (NB-IoT) and 5G New Radio (NR) operations sharing the same frequency bands, particularly due to high-power density signals from NB-IoT interfering with 5G NR operations, and the need to protect critical frequencies used by NOAA satellites from uplink transmissions.
Innovation Solution
Strategic partitioning of carrier bandwidths for DL operations and dynamic blanking patterns for UL operations to segregate NB-IoT and 5G NR transmissions, ensuring they coexist without interference and protecting critical frequencies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If NB-IoT and 5G NR operations share the same frequency band, then spectrum usage is optimized, but interference occurs between NB-IoT high-power density signals and 5G NR operations
Solution Approach 1:
The patent applies segmentation by dividing the frequency band into separate resource blocks for NB-IoT and 5G NR operations. Specifically, it creates distinct physical resource block (PRB) allocations where NB-IoT uses narrowband resources and 5G NR uses wider bandwidth resources, preventing their signals from interfering with each other while maintaining efficient spectrum utilization.
Solution Approach 2:
The patent implements local quality by assigning different transmission characteristics to different parts of the frequency spectrum. NB-IoT operations are confined to specific narrowband regions with appropriate power spectral density limits, while 5G NR operations occupy broader bandwidth regions, allowing each technology to operate with optimized parameters in its designated local frequency zone.
2Reliability
If dynamic blanking patterns are applied to protect NOAA satellite frequencies, then satellite interference is prevented, but spectrum efficiency is reduced
Solution Approach 1:
The patent applies dynamics by implementing time-varying blanking patterns that adapt to satellite positions. The system dynamically adjusts which frequency resources are blanked based on real-time satellite overhead positions, ensuring NOAA frequencies are protected only when satellites are actively transmitting, thereby minimizing spectrum waste while maintaining reliable satellite protection.
Solution Approach 2:
The patent implements periodic action through scheduled blanking patterns that align with satellite transmission cycles. By periodically blanking frequencies at intervals corresponding to satellite overhead passes, the system protects satellite communications during critical periods while allowing full spectrum utilization during intervals when satellites are not overhead, optimizing overall spectrum efficiency.
Data Source
AI summary
Systems and methods for managing downlink (DL) and uplink (UL) operations in wireless telecommunication systems are disclosed that facilitate the coexistence of narrowband-Internet of Things (NB-IoT) and Fifth Generation (5G) New Radio (NR) operations within the same frequency bands. The system partitions carrier bandwidths (BW) to isolate NB-IoT from 5G NR operations, reducing interference. For DL, a portion of the BW is designated for NB-IoT, while the rest is for 5G NR. For UL, protection frequencies are determined to avoid interference with critical satellite communications, such as NOAA satellites, with blanking applied when satellites are overhead. Two main techniques for managing UL operations are provided: a baseline technique and an operationally efficient technique. The system supports various carrier bandwidths and includes dynamic detection and blanking methods to optimize spectrum use and protect essential frequencies.