Secondary-Cell BWP Activation for Lower Terminal Power Consumption
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Solution Overview
Problem
Existing communication systems face challenges in efficiently managing bandwidth part (BWP) activation to balance power consumption and performance, particularly in next-generation wireless communication technologies like NR, where dormant states and BWP operations are not optimized for power saving.
Innovation Solution
A method for activating BWPs in terminals that considers power saving, allowing selective monitoring of PDCCH only on active BWPs and deactivating others to reduce unnecessary power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the terminal monitors PDCCH on all configured BWPs, then communication reliability is improved, but power consumption increases
Solution Approach 1:
The patent segments the bandwidth parts into active and inactive states. The terminal monitors PDCCH only on active BWPs and suspends monitoring on inactive BWPs, thereby reducing power consumption while maintaining communication reliability on active bandwidths. This segmentation allows selective monitoring based on current communication needs.
Solution Approach 2:
The patent implements dynamic BWP activation and deactivation based on downlink control information (DCI). The network can dynamically switch which BWPs are active through DCI signaling, allowing the terminal to adapt its monitoring behavior in real-time. This dynamic approach enables the system to optimize between reliability and power consumption based on instantaneous traffic conditions.
2Productivity
If the terminal activates multiple BWPs simultaneously, then communication capacity is improved, but device complexity increases
Solution Approach 1:
The patent uses a unified DCI mechanism to manage multiple BWPs. The same downlink control information structure is used to indicate activation status across different BWPs, providing a universal control approach. This multi-functionality allows the network to manage multiple bandwidth parts through a single standardized signaling mechanism, reducing the complexity that would arise from separate management procedures for each BWP.
3Speed
If the terminal rapidly switches between dormant and active states, then activation speed is improved, but measurement precision deteriorates
Solution Approach 1:
The patent performs channel measurements and maintains channel state information during the dormant state before full activation. The terminal prepares measurement data in advance while in dormant mode, so that when activation occurs, the channel conditions are already characterized. This preliminary action during dormancy enables rapid activation without sacrificing measurement accuracy, as the measurements were taken in advance when the terminal had sufficient time to measure.
Data Source
AI summary
The present disclosure provides a method and an apparatus, wherein a terminal, for which a primary cell and a secondary cell are configured, performs a random access procedure, and a specific BWP on the secondary cell is activated on the basis that DCI received from a base station indicates non-dormancy.