Base Station BWP Switching for Wireless Energy Saving
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Solution Overview
Problem
Existing wireless communication systems face challenges in energy efficiency, particularly in base stations, as they operate with fixed bandwidths that do not adapt to varying communication demands, leading to unnecessary energy consumption.
Innovation Solution
The method involves configuring and adjusting bandwidth parts (BWPs) at both the base station and user equipment (UE) levels, allowing for dynamic changes in bandwidth to optimize energy usage by overlapping BWPs, thereby reducing unnecessary energy consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If base stations operate with fixed bandwidths to ensure continuous service coverage, then service reliability is improved, but energy consumption increases due to unnecessary bandwidth allocation during low demand periods
Solution Approach 1:
The base station dynamically switches between a first bandwidth part (BWP) for normal operation and a second BWP for energy saving mode. The network device configures both BWPs and controls their switching based on service demand, allowing the system to adapt bandwidth allocation dynamically rather than using a fixed bandwidth, thus reducing energy consumption while maintaining service coverage when needed.
2Loss of energy
If base stations reduce bandwidth to save energy, then energy efficiency is improved, but communication capacity decreases due to reduced bandwidth availability
Solution Approach 1:
The total bandwidth is segmented into multiple bandwidth parts (BWPs), with a first BWP for high-capacity communication and a second BWP for energy-saving operation. This segmentation allows the system to select appropriate bandwidth levels based on actual service needs, preventing energy waste during low demand while maintaining full communication capacity when required.
3Loss of energy
If base stations dynamically adjust bandwidth parts to optimize energy usage, then energy efficiency is improved, but system complexity increases due to multiple BWP configurations and switching control
Solution Approach 1:
The network device performs multiple functions using the same configuration mechanism: it configures both the first and second BWPs, controls their switching, and manages service continuity all through a unified BWP switching control approach. This multi-functionality reduces the need for separate complex control systems for each function, thereby limiting the increase in overall system complexity while achieving energy savings.
Data Source
AI summary
The present disclosure relates to a method and device for energy saving in a wireless communication system. The method performed in a base station in order to save energy in a wireless communication system according to an embodiment disclosed herein comprises the steps of: transmitting configuration information about base station bandwidth parts (BWPs) including a first base station BWP and a second base station BWP smaller than the first base station BWP; transmitting, to a terminal, control information instructing a BWP change to the first base station BWP or the second base station BWP; and, when the control information instructs the BWP change to the second base station BWP, receiving or transmitting a signal from or to the terminal within an overlapping area of the second base station BWP and a terminal BWP configured for the terminal.