Semi-Persistent Scheduling for V2X Radio Resource Allocation
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Solution Overview
Problem
Current V2X communication technologies face challenges in efficiently managing radio resources, particularly for high-mobility User Equipment (UE), leading to increased data load and system performance deterioration due to the use of typical dynamic scheduling methods.
Innovation Solution
Implementing a Semi-Persistent Scheduling (SPS) method where UE assistance information is transmitted to a Base Station (BS) to generate SPS configuration information for V2X communication, allowing for efficient radio resource allocation based on the UE's state, thereby reducing unnecessary resource waste and improving system performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If typical dynamic scheduling method is used for V2X communication, then radio resources can be allocated flexibly, but data load increases abruptly and system performance deteriorates
Solution Approach 1:
The patent implements Semi-Persistent Scheduling (SPS) where radio resources are allocated periodically at predetermined intervals rather than through continuous dynamic scheduling. The BS configures SPS parameters including periodicity, and the UE autonomously transmits V2X data at these periodic intervals without requiring continuous scheduling commands, thereby reducing control signaling overhead and improving system performance while maintaining adequate resource allocation flexibility
Solution Approach 2:
The UE is empowered to autonomously select and transmit data using pre-configured SPS radio resources without requiring continuous BS intervention. The UE independently manages its V2X data transmissions within the allocated periodic resources, reducing the burden on the BS and minimizing control signaling overhead that would otherwise degrade system performance
2Reliability
If typical dynamic scheduling is used for high-mobility UE, then communication can be maintained, but resource waste increases and efficiency decreases
Solution Approach 1:
For high-mobility UEs, the patent applies SPS with predetermined periodic intervals that match the typical generation rate of V2X data. This periodic allocation ensures communication continuity for moving vehicles while avoiding the resource waste associated with frequent dynamic scheduling updates, as the periodic rhythm naturally adapts to the steady-state mobility pattern
Solution Approach 2:
The BS performs preliminary configuration of SPS parameters including periodicity and resource allocation before the UE begins V2X transmissions. This advance configuration allows high-mobility UEs to immediately begin autonomous periodic transmissions without requiring continuous real-time scheduling adjustments, thereby maintaining communication reliability while minimizing resource waste from frequent re-scheduling
3Speed
If continuous V2X data transmission is enabled, then real-time communication is achieved, but radio resource overhead increases
Solution Approach 1:
The patent implements periodic V2X data transmissions at predetermined intervals through SPS, achieving real-time communication for safety-critical applications while significantly reducing radio resource overhead compared to continuous transmission. The periodic nature allows the system to maintain low latency for time-sensitive data while minimizing the total resource consumption and management complexity
Solution Approach 2:
The patent extracts and separates the essential real-time communication requirements from continuous transmission by identifying the actual data generation rate and transmission needs. Through SPS, only the necessary periodic transmissions are maintained for real-time performance, while eliminating redundant continuous transmission overhead, thereby reducing radio resource management complexity
Data Source
AI summary
Provided are a method and apparatus for supporting mobile communication network-based vehicle to everything (V2X) communication. The method may include: transmitting, to a base station, terminal assistance information for semi-persistent scheduling (SPS) of radio resources for V2X communication; receiving, from the base station, SPS configuration information generated using the terminal assistance information; and performing V2X communication by using the SPS configuration information.