Downlink Bandwidth Part Adaptation for DRX Power and Throughput
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Solution Overview
Problem
Existing mobile communication systems face challenges in balancing power consumption and data throughput during downlink communications, particularly in scenarios with varying traffic demands, as they lack efficient mechanisms for bandwidth adaptation and discontinuous reception (DRX) configurations.
Innovation Solution
The integration of bandwidth part adaptation with DRX cycles, where a mobile terminal and base station utilize a combination of narrow and wide bandwidth parts, with dynamic and semi-static configurations, to optimize power saving and throughput based on traffic conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the mobile terminal monitors the entire system bandwidth continuously, then the data throughput is maximized, but the power consumption increases significantly
Solution Approach 1:
The system bandwidth is divided into multiple bandwidth parts (BWPs), where each BWP represents a segment of the total bandwidth. The mobile terminal can be configured to monitor only specific BWPs rather than the entire system bandwidth, thereby reducing power consumption while maintaining adequate data throughput for the configured services
Solution Approach 2:
The bandwidth part configuration is made dynamic through association with DRX cycles. The network can configure different BWPs for different communication periods within a DRX cycle, allowing the terminal to adapt its monitoring bandwidth according to traffic conditions - monitoring wider bandwidths during active periods and narrower bandwidths during idle periods
2Use of energy by moving object
If the mobile terminal uses discontinuous reception (DRX) to reduce power consumption, then the battery life is extended, but the data throughput may be reduced due to intermittent monitoring
Solution Approach 1:
The network pre-configures multiple bandwidth parts and associates them with different communication periods within the DRX cycle. This preliminary configuration allows the terminal to switch between different bandwidth monitoring patterns without delay, ensuring that adequate bandwidth is monitored during active periods to maintain high data throughput
Solution Approach 2:
The system changes the bandwidth monitoring parameter dynamically based on the DRX cycle phase. During active communication periods, the terminal monitors wider bandwidths to maximize throughput; during idle periods, it monitors narrower bandwidths or enters sleep mode to conserve power, thus achieving a balance between throughput and power consumption
3Adaptability or versatility
If the system configures multiple bandwidth parts with different sizes, then the adaptability to varying traffic demands is improved, but the device complexity increases
Solution Approach 1:
The bandwidth part configuration mechanism serves multiple functions: it enables bandwidth adaptation for different traffic types (eMBB, URLLC, mMTC), supports power saving through DRX integration, and provides a unified framework that can be applied across different 5G deployment scenarios. This multi-functionality reduces the need for separate mechanisms for each scenario
Solution Approach 2:
The system uses periodic DRX cycles to systematically switch between different bandwidth parts. This periodic structure provides a regular, predictable pattern for bandwidth changes, making the configuration management more systematic and less complex compared to ad-hoc bandwidth adjustments
Data Source
AI summary
The present disclosure relates to a mobile terminal, a base station, an operating method for a mobile terminal and an operating method for a base station. The mobile terminal is for communicating in a mobile communication system with a base station using at least one of a first bandwidth part, BP1, and a second bandwidth part, BP2. Both, the first and second bandwidth part BP1 and BP2 are within a system bandwidth, wherein the first bandwidth part, BP1, is smaller than the second bandwidth part, BP2. The mobile terminal comprises a transceiver which, in operation, receives a configuration of a discontinuous reception, DRX, cycle. Further, the mobile terminal comprises a processor which, in operation, configures, upon reception of the configuration of the DRX cycle, the a downlink communication during at least one of the communication periods within the DRX cycle to use a specific one of at least the first bandwidth part, BP1, and the second bandwidth part, BP2.