PUSCH Stop Indication for Overlapped Configured Grant Interference
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Interference between signals of different devices is compounded by unnecessary transmissions in certain wireless communications networks.
Innovation Solution
Implementing a stop indication for physical uplink shared channel transmission using a listen-before-talk procedure, where a group of user equipments are instructed not to transmit in an overlapped configured grant resource for a specified period corresponding to a spatial filter.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If user equipments transmit in overlapped configured grant resources autonomously, then transmission productivity is improved, but interference between signals is worsened
Solution Approach 1:
The network entity monitors autonomous uplink transmissions from user equipments and provides feedback in the form of stop indications when interference is detected or predicted. This feedback mechanism allows UEs to adjust their transmission behavior dynamically, stopping transmissions that would cause or experience interference while maintaining autonomous transmission for non-interfering cases, thus resolving the contradiction between transmission productivity and signal interference.
Solution Approach 2:
The system dynamically changes transmission parameters by introducing stop indications that modify the transmission state of user equipments. When a stop indication is received, the UE changes its transmission parameter from active to inactive for the indicated duration, allowing the system to adapt transmission behavior to current channel conditions and interference levels, thereby maintaining productivity while reducing interference.
2Object-affected harmful factors
If listen-before-talk procedure is performed before autonomous uplink transmission, then interference is reduced, but transmission delay is increased
Solution Approach 1:
The listen-before-talk procedure is performed as a preliminary action before autonomous uplink transmission. By sensing the channel for a short duration before transmission, the system can detect ongoing transmissions and avoid interference without requiring lengthy coordination procedures. This preliminary channel assessment reduces interference while minimizing the time loss compared to full coordination mechanisms.
Solution Approach 2:
Instead of performing complete coordination procedures for every autonomous transmission, the system applies partial action through listen-before-talk - a simplified, shorter-duration channel sensing mechanism that provides sufficient interference avoidance for autonomous transmissions without the full overhead of coordinated scheduling, thus reducing transmission delay while maintaining interference reduction benefits.
3Object-affected harmful factors
If stop indication is transmitted to control group transmissions, then interference is reduced, but network complexity is increased
Solution Approach 1:
The stop indication mechanism serves multiple functions: it controls group transmissions, manages interference, and coordinates resource usage across multiple user equipments simultaneously. By using a single unified signaling mechanism that can address multiple UEs and multiple interference scenarios, the network complexity is minimized while achieving comprehensive interference reduction across the cell.
Data Source
AI summary
Apparatuses, methods, and systems are disclosed for using a stop indication for physical uplink shared channel transmission. One method includes transmitting a physical uplink shared channel transmission in an autonomous uplink configured grant resource after performing a listen-before-talk procedure. In various embodiments, the method includes receiving a stop indication in response to transmitting the physical uplink shared channel transmission, wherein the stop indication indicates for a group of user equipments not to transmit in an overlapped configured grant resource for a period of time corresponding to a spatial filter.