Downlink Bandwidth Part Switching Across DRX Cycles
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Solution Overview
Problem
Existing mobile communication systems face challenges in efficiently adapting bandwidth parts for downlink communications while minimizing power consumption and maintaining effective data throughput, particularly when using discontinuous reception (DRX) mechanisms.
Innovation Solution
The integration of bandwidth part adaptation with DRX cycles, where a mobile terminal and base station utilize semi-statically configured narrow and wide bandwidth parts during different communication periods of the DRX cycle, allowing dynamic activation of wider bandwidth for data-intensive periods and narrow bandwidth for power-saving, while maintaining synchronized communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If discontinuous reception (DRX) is used to reduce power consumption, then battery life is improved, but data throughput may be reduced due to reduced reception opportunities
Solution Approach 1:
The patent applies dynamics by making the bandwidth part configurable and switchable based on traffic conditions. The network can dynamically activate either a first bandwidth part (narrower bandwidth) during DRX sleep periods or a second bandwidth part (wider bandwidth) during active periods, allowing the system to adapt its reception characteristics to match current data throughput requirements while maintaining power savings during low-activity periods.
2Use of energy by moving object
If narrower bandwidth part is used during DRX to save power, then energy consumption is reduced, but reception capability for data-intensive periods is worsened
Solution Approach 1:
The patent applies preliminary action by pre-configuring multiple bandwidth parts (a first bandwidth part and a second bandwidth part) before DRX operation begins. The network configures the UE with both bandwidth parts in advance, so that when data-intensive periods occur, the network can immediately switch to the wider second bandwidth part without delay, while during normal periods the narrower first bandwidth part suffices for power savings.
3Productivity
If wider bandwidth part is continuously used to maintain high data throughput, then productivity is improved, but power consumption increases
Solution Approach 1:
The patent applies periodic action by implementing bandwidth part switching that aligns with DRX cycles. The UE alternates between using the narrower first bandwidth part during DRX sleep periods (when power savings are prioritized) and the wider second bandwidth part during active reception periods (when data throughput is prioritized). This periodic switching pattern allows the system to achieve high average throughput while maintaining significant power savings compared to continuous wide bandwidth operation.
Data Source
Figure 1a~1b
Figure 1c~1d
Figure 2
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.