Dormant BWP Inactivity Timer Suspension for Power Saving
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In the context of next-generation wireless communication systems, particularly in new radio (NR) technology, there is a challenge in managing bandwidth parts (BWP) effectively to prevent unintended transitions from dormant to default states, leading to inefficiencies in power saving and communication reliability.
Innovation Solution
The method involves configuring dormant BWP configuration information and using DCI to manage BWP inactivity timers, allowing the terminal to ignore the default BWP inactivity timer when activated in a dormant state, ensuring that the terminal remains in the dormant BWP for power saving without inadvertently transitioning to the default BWP.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the BWP inactivity timer is used to manage dormant BWP, then the terminal can automatically transition to default BWP after inactivity, but the terminal is forcibly transferred to the default BWP unintentionally, losing power saving opportunities
Solution Approach 1:
The patent changes the parameter state of the BWP inactivity timer by configuring it with an infinite value or suspending it when the dormant BWP is activated. This parameter modification prevents the automatic expiration that would otherwise force transition to default BWP, allowing the terminal to maintain dormant state indefinitely for power saving while still enabling reliable state management through explicit network commands.
2Use of energy by moving object
If the terminal remains in dormant BWP for power saving, then energy consumption is reduced, but unintended transitions to default BWP occur due to timer expiration
Solution Approach 1:
The patent implements a feedback mechanism where the network side monitors the dormant BWP activation state and explicitly controls the BWP inactivity timer. When the terminal is in dormant state, the network can determine whether to suspend or configure the timer with infinite value, creating a closed-loop control system that prevents unintended transitions while maintaining power saving benefits.
3Productivity
If the BWP inactivity timer is configured with a finite value, then automatic transition to default BWP occurs after inactivity, but power saving opportunities are lost due to premature transitions
Solution Approach 1:
The patent makes the BWP inactivity timer dynamic by allowing its value to change based on the dormant BWP activation state. When dormant BWP is activated, the timer is suspended or set to infinite; when deactivated, the timer resumes with its original finite value. This dynamic adjustment enables the system to optimize between communication efficiency and power saving at different operational phases.
Data Source
AI summary
The present specification provides a method by which a terminal performs initial access in a wireless communication system, comprising: transmitting a random access (RA) preamble to a base station; receiving a random access response (RAR) from the base station; receiving dormant bandwidth part (BWP) configuration information from the base station, the dormant BWP configuration information being information about a downlink BWP used as a dormant BWP, from among one or more downlink BWPs set to the terminal; receiving, from the base station, downlink control information (DCI) notifying the activation of the dormant BWP; and stopping physical downlink control channel (PDCCH) monitoring on the dormant BWP, wherein a BWP inactivity timer, which is a timer for the transition to a default BWP, is not used on the basis of the activation of the dormant BWP.