SPS Configuration Update Feedback Mechanism for Wireless Reliability
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current wireless communication systems, particularly in 5G and LTE, face challenges in reliably updating semi-persistent scheduling (SPS) configurations over control channels, which can lead to communication failures in mission-critical environments like factory automation, where periodic updates are crucial for maintaining connectivity and data transmission reliability.
Innovation Solution
A method is introduced to enhance SPS configuration updates by determining SPS update resources based on configured periodicity, transmitting updates over control channels, and utilizing feedback mechanisms to confirm receipt of updates, allowing for retransmissions if necessary, thereby improving the reliability of SPS communications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If SPS updates are transmitted over control channels without feedback confirmation, then the control channel load is reduced, but the reliability of SPS configuration updates deteriorates
Solution Approach 1:
The patent implements a feedback mechanism where the receiving device sends confirmation messages to the transmitting device to indicate successful reception of SPS updates. The transmitting device monitors for these feedback messages and performs retransmissions when feedback is not received, thereby ensuring reliable update delivery while maintaining efficient control channel utilization.
2Speed
If SPS updates are transmitted without retransmission capability, then the transmission speed is faster, but the communication reliability in mission-critical environments deteriorates
Solution Approach 1:
The system employs feedback-based retransmission where the transmitting device waits for confirmation from the receiving device. If feedback indicating successful reception is not received within a predetermined time period, the transmitting device automatically retransmits the SPS update, thus ensuring reliable delivery in mission-critical environments while maintaining efficient transmission speeds.
3Reliability
If feedback mechanisms are implemented for every SPS update, then the reliability of update delivery is improved, but the control channel overhead increases
Solution Approach 1:
The patent implements feedback mechanisms selectively rather than for every SPS update. The system monitors for feedback messages and only triggers retransmissions when feedback is not received, applying feedback action partially based on actual reception status. This approach ensures reliable delivery for critical updates while minimizing unnecessary control channel overhead.
Data Source
AI summary
Aspects described herein relate to reporting feedback for semi-persistent scheduling (SPS) configuration updates. SPS communications can be activated over SPS resources with an access point. SPS update resources related to a configured periodicity for receiving SPS updates to SPS resource grants over a control channel can be determined. It can also be determined whether a SPS update is received in the SPS update resources over the control channel. Feedback can be transmitted to the access point, where the feedback indicates whether the SPS update is received over the SPS update resources.