Wireless Device Sidelink Resource Reselection for Priority Conflicts
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Solution Overview
Problem
In wireless communication systems, particularly in 3GPP LTE and NR, there is a challenge in simultaneously performing uplink and sidelink transmissions due to overlapping signals, which can lead to data loss and inefficient resource allocation, especially when uplink transmissions have higher priority.
Innovation Solution
A method where a wireless device reserves resources for sidelink transmission, determines if the transmission overlaps with uplink transmission and has a higher priority, clears the conflicting resource, and adds a new resource to the set for efficient retransmissions, allowing dynamic allocation considering service characteristics and requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If sidelink transmission resources are reserved in advance, then resource allocation efficiency is improved, but data loss occurs when sidelink transmission overlaps with high-priority uplink transmission
Solution Approach 1:
The patent implements dynamic resource reselection by allowing the wireless device to clear conflicting sidelink resources and select new resources when uplink transmission priority exceeds a threshold. This dynamic adjustment mechanism resolves the contradiction by adapting resource allocation to real-time transmission priorities, ensuring both efficient resource utilization and reliable data transmission without conflicts between sidelink and high-priority uplink transmissions.
2Device complexity
If transmission resources are fixed and pre-configured, then device complexity is reduced, but resource utilization efficiency deteriorates when transmission priorities change
Solution Approach 1:
The patent changes the parameter of resource allocation from static pre-configuration to dynamic selection based on transmission priority thresholds. The network configures priority thresholds and resource pools, and the wireless device selects resources dynamically based on whether uplink transmission priority exceeds the threshold. This parameter change enables efficient resource utilization while maintaining manageable device complexity through standardized decision logic.
3Ease of operation
If sidelink and uplink transmissions use overlapping resources, then resource allocation simplicity is improved, but data loss increases due to transmission collisions
Solution Approach 1:
The patent applies preliminary action by having the wireless device check transmission priorities and clear conflicting sidelink resources before performing uplink transmission. The network pre-configures priority thresholds and resource pools, enabling the device to proactively avoid collisions by selecting alternative resources when uplink priority exceeds the threshold. This preliminary resource clearing and reselection prevents data loss from collisions while maintaining operational simplicity through automated priority-based decisions.
Data Source
AI summary
A method and apparatus for triggering of transmission carrier or resource reselection in a wireless communication system is provided. A first wireless device reserves a set of resources comprising at least a first resource and a second resource for sidelink transmission. When (i) the sidelink transmission using the first resource overlaps with an uplink transmission, and (ii) a priority of the uplink transmission is higher than a threshold, the first wireless device clears the first resource from the set of resources, and adds a third resource to the set of resources.