Semi-Persistent Scheduling Priority Configuration for V2x Collision Avoidance
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In Vehicle-to-Everything (V2x) communications, simultaneous activation of multiple Semi-Persistent Scheduling (SPS) configurations leads to collisions at terminal devices, causing inefficient blind detection and resource wastage, as existing methods lack effective solutions for utilizing these configurations in Device-to-Device (D2D) sidelink or cellular uplink communications.
Innovation Solution
A method where a base station determines and indicates priority information for SPS configurations to terminal devices, allowing them to select the appropriate configuration for packet transmission based on resource allocation, packet type, or traffic type, thereby reducing collisions and optimizing resource utilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple SPS configurations are activated simultaneously at one UE, then the V2x communication capacity and service coverage are expanded, but packet collisions occur at the terminal device causing resource wastage and inefficient blind detection
Solution Approach 1:
The patent changes the parameter of SPS configuration by introducing priority levels (first priority, second priority, etc.) to differentiate between multiple SPS configurations. This allows the terminal device to select appropriate configurations based on packet priority, resolving the collision issue while maintaining multiple active configurations for enhanced capacity
Solution Approach 2:
The patent segments the SPS configuration space by dividing configurations into different priority groups. Instead of treating all SPS configurations equally, the system segments them by priority level, allowing simultaneous activation of multiple configurations without collisions by directing different priority packets to different configuration groups
2Adaptability or versatility
If multiple SPS configurations are activated simultaneously, then more resource allocations are available for different packet types, but blind detection becomes tedious and inefficient
Solution Approach 1:
The patent applies preliminary action by pre-configuring priority levels for different SPS configurations at the base station before transmission. The terminal device receives indication information about which SPS configuration to use based on packet priority, eliminating the need for complex blind detection and reducing device complexity while maintaining configuration flexibility
3Productivity
If multiple SPS configurations are activated simultaneously, then resource allocation can be optimized for different traffic types, but collisions cause resource wastage
Solution Approach 1:
The patent introduces priority level parameters to SPS configurations, allowing the base station to allocate resources efficiently across different traffic types by assigning appropriate priority levels. This prevents collisions by ensuring that packets of different priorities use different SPS configurations, thereby optimizing resource allocation while avoiding resource wastage
Data Source
AI summary
Embodiments of the present disclosure relate to a method and device for semi-persistent scheduling (SPS). In example embodiments, the base station determines a plurality of SPS configurations for the terminal device and further indicates priority information associated with at least one of the plurality of SPS configurations to the terminal device. Accordingly, based on the priority information, the terminal device can select one of the SPS configurations for packet transmission. In this way, the SPS configurations may be utilized in a non-conflicting way.