Dynamic Bandwidth Configuration for Narrowband IoT Devices
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Solution Overview
Problem
Narrowband wireless communication systems face challenges due to limited frequency dimensions, requiring efficient bandwidth management to support low complexity devices with low power consumption and varying communication needs, such as in NB-IoT and eMTC, which are limited to specific bandwidths and struggle with multi-user capacity and coverage.
Innovation Solution
Dynamic bandwidth configuration for both user equipment (UE) and base stations, allowing adjustments based on specific functions or applications, such as positioning, VoLTE, or RLM, to optimize bandwidth usage and reduce power consumption by switching between narrower and wider bandwidths as needed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If narrowband bandwidth is used for low complexity devices, then power consumption is reduced and device complexity is lowered, but multi-user capacity and coverage are limited
Solution Approach 1:
The patent implements dynamic bandwidth configuration that allows user equipment to switch between narrowband and wideband modes based on service requirements. The base station configures multiple bandwidth parameters including narrowband bandwidth for power-saving operations and wideband bandwidth for high-capacity services, enabling the system to adapt bandwidth usage dynamically rather than being fixed at narrowband only.
Solution Approach 2:
The patent changes the bandwidth parameter from a fixed narrowband configuration to a variable configuration that can be adjusted between narrowband and wideband modes. The base station configures different bandwidth parameters (first bandwidth for narrowband, second bandwidth for wideband) and the user equipment switches between these parameter sets based on service type, thereby resolving the contradiction between low power consumption and high capacity.
2Device complexity
If narrowband bandwidth is used for low complexity devices, then device complexity is reduced, but measurement accuracy and service performance deteriorate
Solution Approach 1:
The system dynamically adjusts bandwidth configuration based on the specific service being performed. For positioning services requiring high measurement accuracy, the system switches to wideband configuration. For basic communication services, narrowband configuration suffices. This dynamic switching allows the device to maintain low complexity for simple tasks while achieving high measurement accuracy when needed.
Solution Approach 2:
The patent implements multiple bandwidth parameter configurations that can be switched based on service requirements. The base station configures both narrowband and wideband parameters, and the user equipment changes between these parameter sets depending on whether the current service requires high measurement accuracy (wideband) or can operate with lower complexity (narrowband).
3Measurement precision
If bandwidth is increased for specific functions like positioning or VoLTE, then measurement accuracy and service performance improve, but power consumption increases
Solution Approach 1:
The system dynamically switches bandwidth configuration based on the active service. When positioning or VoLTE services are active, the system transitions to wideband mode to achieve necessary measurement accuracy and service performance. When these services are inactive, the system returns to narrowband mode to minimize power consumption. This dynamic adaptation ensures that high bandwidth is used only when and where needed.
Solution Approach 2:
The patent implements configurable bandwidth parameters that can be changed based on service type. The base station provides both narrowband and wideband bandwidth configurations, and the user equipment switches between these parameter sets depending on the active service requirements, thereby optimizing the trade-off between measurement accuracy and power consumption.
4Device complexity
If fixed bandwidth configuration is used, then device complexity is reduced, but adaptability to different services deteriorates
Solution Approach 1:
The patent implements dynamic bandwidth configuration where the system can adapt between narrowband and wideband modes based on service requirements. The base station configures multiple bandwidth parameters and the user equipment switches between them dynamically, providing service adaptability without requiring permanently complex hardware for all possible services.
Solution Approach 2:
The system uses configurable bandwidth parameters that can be changed based on the active service. The base station provides different bandwidth configurations (narrowband for power-saving, wideband for high-performance services) and the user equipment changes between these parameter sets, thereby achieving service adaptability while maintaining relatively simple device architecture.
Data Source
AI summary
In order to conserve power resources for low complexity UEs, a base station may apparatus dynamically adjust a bandwidth configuration of a UE or the base station and communicates with the UE according to the dynamically adjusted bandwidth configuration. The communication may be narrowband communication. A UE may apparatus dynamically adjust a bandwidth configuration of the UE and communicates with a base station based on the dynamically adjusted bandwidth configuration. The dynamically adjusted bandwidth configuration may correspond to a function performed by the UE.