D2D SPS Resource Determination Reducing SCI Decoding Overhead
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current D2D communication processes are inefficient due to the need for repeated determination of D2D communication resources by both transmitting and receiving terminals within each SC period, leading to low communication efficiency.
Innovation Solution
Implementing Semi-Persistent Scheduling (SPS) where the D2D SPS available period is greater than one SC period, allowing the first terminal to determine the D2D SPS resource only once and the second terminal to decode SCI only once, thereby reducing the frequency of resource determination and enhancing communication efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If D2D communication resources are allocated for each SC period, then resource allocation flexibility is improved, but communication efficiency deteriorates due to repeated resource determination
Solution Approach 1:
The patent implements semi-persistent scheduling where D2D communication resources are allocated periodically for multiple SC periods instead of every SC period. The network device configures a D2D SPS available period spanning multiple SC periods, and both transmitting and receiving terminals determine resources only once per available period, reducing repeated determination while maintaining periodic communication patterns
Solution Approach 2:
The network device performs preliminary resource allocation by configuring D2D SPS resource information in advance for multiple SC periods. The transmitting terminal determines D2D SPS resources once at the beginning of the available period, and both terminals have the resource information predetermined, eliminating the need for repeated resource determination in subsequent SC periods
2Speed
If resource determination is performed in each SC period, then resource allocation responsiveness is improved, but terminal processing overhead increases
Solution Approach 1:
The patent reduces terminal processing overhead by implementing periodic resource determination instead of per-SC-period determination. Both transmitting and receiving terminals determine D2D SPS resources once per D2D SPS available period, significantly reducing the frequency of resource determination operations and associated processing overhead while maintaining periodic resource availability
Solution Approach 2:
The patent uses SCI (Sidelink Control Information) to carry and replicate D2D SPS resource information between terminals. The transmitting terminal includes D2D SPS resource information in SCI messages, allowing the receiving terminal to obtain resource information through information copying rather than independent determination, reducing processing complexity
Data Source
Figure 1A
Figure 1B
Figure 2~3
AI summary
Embodiments of the present invention propose a D2D communications method, apparatus, and system. In the solution, a D2D SPS available period in which a first terminal is capable of using a D2D SPS resource is greater than one SC period. Therefore, in the D2D SPS available period, the first terminal needs to determine the D2D SPS resource only one time, and a second terminal also needs to decode SCI only one time to determine the D2D SPS resource. In this way, the first terminal does not need to determine a D2D SPS resource in each SC period, and the second terminal also does not need to decode SCI in each SC period to determine the D2D SPS resource. Therefore, D2D communication efficiency is improved.