BWP Inactivity Timer Restart for SPS Data Loss Prevention
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current wireless communication systems face challenges in efficiently managing Bandwidth Parts (BWP) due to limitations in BWP inactivity timer operations, particularly in scenarios involving Semi-Persistent Scheduling (SPS) resources, leading to potential data loss during BWP switching.
Innovation Solution
The proposed method involves restarting the BWP inactivity timer when a DL or UL SPS resource is active or when a MAC PDU is received/transmitted on the SPS resource, ensuring that the timer is properly reset to prevent data loss during BWP switching.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the BWP inactivity timer is not restarted when SPS resources are active, then the timer operation is simple, but data loss occurs during BWP switching
Solution Approach 1:
The patent implements feedback by monitoring whether a MAC PDU is received or transmitted on SPS resources, and using this information to restart the BWP inactivity timer. This feedback mechanism ensures that the timer accurately reflects actual data transmission activity, preventing data loss during BWP switching while maintaining appropriate timer complexity.
2Reliability
If the BWP inactivity timer is restarted frequently, then data loss is prevented, but the timer management becomes complex
Solution Approach 1:
The patent applies self-service by having the UE automatically monitor its own data transmission status on SPS resources and autonomously decide when to restart the BWP inactivity timer based on whether MAC PDUs are successfully transmitted or received. This self-service approach eliminates the need for complex external timer management while ensuring reliable BWP operation.
Data Source
AI summary
The present invention relates to a wireless communication system. More specifically, the present invention relates to a method and a device for handling for Bandwidth Part operation in wireless communication system, the method comprising: starting a timer related to a downlink (DL) bandwidth part (BWP), when an active BWP for a serving cell is switched to the DL BWP; wherein DL semi-persistent scheduling (SPS) resources are configured on the DL BWP and uplink (UL) SPS resources are configured on a UL BWP related with the DL BWP; transmitting UL data on one of the UL SPS resources or receiving DL data on one of the DL SPS resources; and restarting the timer related to the DL BWP when the UL data is transmitted on the UL SPS resource or the DL data is received in the DL SPS resource.