Sidelink Resource Reselection via Priority Collision Handling
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently managing and optimizing the communication protocols and resources, particularly in scenarios involving multiple technologies, releases, and varying device capabilities.
Innovation Solution
The proposed solution involves a mechanism for dynamically configuring and adapting communication protocols and resources based on specific criteria such as device capabilities, traffic load, and system configurations, allowing for selective implementation of protocols in wireless devices and base stations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a wireless device is configured to monitor multiple downlink carriers for preemption indications, then the ability to detect and respond to transmission preemptions is improved, but the device complexity and processing overhead increase
Solution Approach 1:
The monitoring of preemption indications is segmented by carrier index, where each downlink carrier is assigned a specific monitoring configuration. The wireless device divides the monitoring task across multiple carriers independently, tracking preemption indications for each carrier separately rather than treating all carriers as a single monitoring entity, thereby managing complexity through structured division
Solution Approach 2:
The network pre-configures the wireless device with monitoring configurations for multiple downlink carriers before preemption events occur. These configurations include carrier indices, monitoring occasions, and associated parameters, allowing the device to be ready to detect preemptions immediately when they occur on any configured carrier without requiring real-time configuration setup
2Adaptability or versatility
If uplink transmission resources are preempted to accommodate higher priority traffic, then network flexibility and priority handling are improved, but the reliability of scheduled uplink transmissions deteriorates
Solution Approach 1:
The network provides feedback to the wireless device through downlink preemption indications that inform the device when its scheduled uplink resources have been preempted. This feedback mechanism allows the device to understand the preemption event, identify the affected resources, and respond appropriately by canceling or adjusting the uplink transmission, thereby maintaining reliability despite the preemptive action
Solution Approach 2:
The system preemptively allocates resources for higher priority traffic even when lower priority transmissions are scheduled. By having the capability to preempt resources in advance based on priority needs, the network ensures that critical traffic can always be transmitted, while the preemption indication mechanism provides the means to manage the impact on lower priority transmissions
3Measurement precision
If multiple monitoring configurations are assigned to different downlink carriers, then the precision of preemption indication tracking is improved, but the loss of time for processing and response increases
Solution Approach 1:
Each downlink carrier is assigned specific monitoring configurations tailored to its characteristics and the services it carries. The monitoring precision is optimized locally for each carrier based on its specific requirements, allowing the system to achieve high tracking precision for each carrier independently without requiring uniform high-level monitoring across all carriers, which would be more time-consuming
Data Source
AI summary
A first wireless device selects first radio resources for a first sidelink transmission of the first wireless device. The first wireless device receives, from a second wireless device, sidelink control information (SCI) reserving second radio resources for a second sidelink transmission of the second wireless device. The first wireless device determines a collision between the first radio resources and the second radio resources. The first wireless device performs a comparison of a first priority of the first sidelink transmission and a second priority of the second sidelink transmission. The first wireless device selects, based on the comparison and the collision, third radio resources for the first sidelink transmission. The first wireless device transmits the first sidelink transmission via the third radio resources.