D2D SPS Signal Priority Management for Collision Avoidance
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Solution Overview
Problem
Current D2D communication systems face inefficiencies in transmitting and receiving semi-persistent scheduled (SPS) signals, particularly when collisions occur between SPS signals and base station transmissions, leading to suboptimal priority management and resource allocation.
Innovation Solution
A method and apparatus for D2D SPS signal transmission in a wireless communication system, where priority information is received from a base station to determine whether to transmit the SPS signal or the signal to the base station, with priority-based decision-making and power control to manage collisions and optimize resource usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If D2D SPS signal transmission is implemented without priority management, then device-to-device communication can proceed, but collisions with base station signals occur causing transmission inefficiency
Solution Approach 1:
The base station pre-assigns priority information to D2D SPS signals before transmission occurs. This preliminary assignment enables user equipment to proactively determine transmission priorities and avoid collisions with base station signals before they happen, resolving the contradiction between maintaining transmission productivity and ensuring reliable collision avoidance.
2Reliability
If priority information is assigned to D2D SPS signals, then collision management improves, but system complexity increases due to additional priority determination logic
Solution Approach 1:
User equipment autonomously determines transmission priorities by comparing the assigned D2D SPS signal priority with base station signal priorities, and independently makes transmission decisions without requiring complex centralized control. This self-service approach improves collision management while minimizing the increase in system complexity by distributing the decision-making logic to individual devices.
3Productivity
If D2D SPS transmission collides with base station signal transmission, then resource utilization occurs, but transmission reliability deteriorates due to unresolved priority conflicts
Solution Approach 1:
The system introduces priority information as a new parameter that changes the transmission behavior characteristics. By assigning different priority levels to D2D SPS signals and base station signals, the system can dynamically adjust transmission decisions based on signal importance, enabling reliable collision resolution while maintaining efficient resource utilization through priority-based access.
Data Source
AI summary
The present invention relates to a radio communication system which supports device-to-device (D2D) communication. More particularly, the present invention relates to a method for transmitting a D2D semi-persistent scheduled (SPS) signal in a radio communication system which supports D2D communication, and an apparatus therefor, the method comprising the steps of: receiving priority information of a D2D SPS signal from a base station; determining whether to send the D2D SPS signal or a signal intended for the base station, on the basis of the priority information, in a case where there is a clash, in a particular sub-frame, between the transmission of the D2D SPS signal and the signal intended for the base station; and transmitting the D2D SPS signal to a second terminal if the priority information of the D2D SPS signal has a higher priority than the signal intended for the base station.