Uplink Preconfigured Resources Synchronization Adaptation
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Solution Overview
Problem
In wireless communication networks, uplink transmissions using preconfigured uplink resources (PUR) in RRC_IDLE mode may not occur immediately and can be invalid due to UE mobility or timing drift, leading to wasted resources.
Innovation Solution
The wireless device determines its synchronization status with the serving cell and adapts the PUR transmission scheme by suspending, delaying, or releasing intended PUR transmissions when synchronization accuracy becomes poor, ensuring reliable transmissions only during synchronized periods.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If PUR resources are allocated for uplink transmissions in RRC_IDLE mode, then resource utilization is improved, but transmission reliability deteriorates due to UE mobility and timing drift
Solution Approach 1:
The patent implements dynamic adaptation of PUR transmission parameters based on synchronization status. The UE monitors its synchronization state and dynamically adjusts transmission behavior (suspending, delaying, or releasing PUR transmissions) to maintain reliability while preserving resource utilization benefits.
Solution Approach 2:
The patent introduces feedback mechanisms where the UE determines its synchronization status with the serving cell and uses this information to adapt PUR transmission schemes. This closed-loop approach ensures transmissions occur only when synchronization accuracy is sufficient, resolving the contradiction between resource utilization and reliability.
2Speed
If PUR transmissions are performed without checking synchronization status, then transmission speed is improved, but resource waste increases due to invalid transmissions
Solution Approach 1:
The patent applies preliminary action by having the UE determine synchronization status before initiating PUR transmissions. This pre-check mechanism prevents invalid transmissions from occurring in the first place, eliminating resource waste while maintaining transmission speed when conditions are favorable.
Solution Approach 2:
The UE autonomously monitors its own synchronization status and makes independent decisions about whether to proceed with PUR transmissions. This self-service approach enables the UE to avoid resource waste without requiring continuous network intervention, preserving transmission speed efficiency.
3Reliability
If synchronization status is monitored and PUR transmissions are adapted, then transmission reliability is improved, but device complexity increases
Solution Approach 1:
The UE performs self-monitoring of synchronization status using existing measurement capabilities without requiring additional complex infrastructure. The device independently determines whether to adapt PUR transmissions based on its own state, improving reliability while minimizing the complexity increase to only what is necessary for status determination.
Solution Approach 2:
The patent changes operational parameters (transmission suspension, delay, or release) based on synchronization status rather than fundamentally altering the device architecture. This approach improves reliability through parameter adaptation rather than structural complexity increases.
Data Source
AI summary
One embodiment provides a method performed by a wireless device. The method comprises: receiving, from a network node, a configuration message comprising an indication of preconfigured radio resources for uplink transmissions; obtaining a synchronization status of the wireless device with respect to the network node; and adapting use of the preconfigured radio resources based on the synchronization status of the wireless device with respect to the network node.