UE Cancellation Indication for Uplink Scheduling Conflict Resolution
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Solution Overview
Problem
In wireless communication systems, user equipment (UE) often faces scheduling conflicts due to network entities being unaware of the UE's tasks and priorities, leading to increased latency and inefficiencies in resource allocation.
Innovation Solution
The UE is enabled to transmit a cancellation indication to the network entity for scheduled uplink resources, allowing it to cancel conflicts and reallocate resources for higher priority tasks, with the cancellation indication being transmitted either before or after the scheduled uplink message.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the network entity schedules uplink resources without awareness of UE tasks and priorities, then resource allocation is simplified, but scheduling conflicts and latency increase
Solution Approach 1:
The UE provides feedback to the network entity by transmitting a cancellation indication when it detects a scheduling conflict with higher priority tasks. This feedback mechanism allows the network to adjust its scheduling decisions based on actual UE conditions, resolving the contradiction between simplified network scheduling and reduced latency by enabling dynamic adaptation without increasing network complexity.
Solution Approach 2:
The UE autonomously identifies scheduling conflicts with its own tasks and priorities, and self-manages the cancellation of lower priority uplink transmissions. This self-service approach allows the UE to handle its own scheduling conflicts without requiring complex network intervention, thereby reducing latency while maintaining simple network scheduling.
2Reliability
If the UE transmits cancellation indication before uplink message, then network can adjust decoding accordingly, but uplink transmission time is reduced
Solution Approach 1:
The UE transmits the cancellation indication before the uplink message to allow the network to prepare for adjusted decoding. This preliminary action ensures the network is aware of the cancellation before receiving the uplink message, improving decoding accuracy while minimizing the impact on transmission duration by using efficient signaling formats.
3Adaptability or versatility
If the UE prioritizes higher priority tasks over scheduled uplink transmissions, then task scheduling flexibility improves, but network resource utilization may decrease
Solution Approach 1:
The system dynamically adjusts uplink transmission based on real-time task priorities at the UE. The UE can cancel scheduled uplink transmissions when higher priority tasks are detected, providing scheduling flexibility. The network compensates for reduced utilization by dynamically reallocating the freed resources to other UEs or tasks, maintaining overall productivity while enabling adaptability.
Data Source
AI summary
Methods, systems, and devices for wireless communications are described. A user equipment (UE) may receive a downlink message indicating a set of resources on which an uplink message is scheduled to be transmitted by the UE. The UE may identify a scheduling conflict with at least a portion of the set of resources, where the scheduling conflict may arise between the uplink message and a second communication at the UE. A network entity may for a cancellation indication indicating that transmission of the uplink message on at least a portion of the set of resources is preempted based at least in part on a scheduling conflict at the UE. The UE may transmit a cancellation indication to indicate that transmission of the uplink message on at least the portion of the set of resources is preempted based on the scheduling conflict.