D2D Discovery Resource Segmentation for Collision Prevention
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently managing resource allocation and collision prevention during device-to-device (D2D) communication, particularly in defining discovery resource regions and sending discovery messages effectively.
Innovation Solution
A method is introduced for performing a discovery procedure in D2D communication, involving monitoring a discovery resource region, selecting a discovery resource, and sending a discovery message, with a guard time for operation changes and resource allocation every discovery period, using a processor to manage resource selection and collision detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If device-to-device communication is implemented to reduce network overhead and eNB burden, then network efficiency and data transfer rate improve, but resource allocation complexity and collision management difficulty increase
Solution Approach 1:
The discovery resource region is segmented into multiple discovery resources (first discovery resource, second discovery resource, third discovery resource) that can be independently allocated and managed. This segmentation allows the system to handle resource allocation in discrete units, reducing the complexity of managing continuous resources while improving network efficiency through targeted resource assignment.
Solution Approach 2:
The patent implements dynamic resource allocation where the eNB can flexibly assign different discovery resources to different UEs based on current network conditions, UE capabilities, and traffic requirements. This dynamic approach allows the system to adapt to changing conditions, maintaining high network efficiency while managing resource allocation complexity through centralized control.
2Productivity
If discovery resources are allocated to multiple UEs for D2D communication, then network capacity increases, but resource collision probability increases
Solution Approach 1:
The patent implements a feedback mechanism where UEs report channel conditions, interference levels, and resource usage status to the eNB. The eNB uses this feedback information to make informed resource allocation decisions, assigning discovery resources that minimize collision probability while maximizing network capacity. The feedback loop enables continuous optimization of resource allocation.
Solution Approach 2:
The system performs preliminary resource allocation and collision detection before actual D2D communication begins. The eNB pre-assigns discovery resources to UEs based on predicted traffic patterns and channel conditions, and performs preliminary collision detection to identify and resolve potential conflicts before they occur, thereby maintaining high network capacity while ensuring reliable collision-free communication.
3Reliability
If guard time is added for operation switching between transmission and reception, then communication reliability improves, but discovery procedure duration increases
Solution Approach 1:
The patent structures the discovery procedure with periodic guard times that occur at regular intervals during the operation switching between transmission and reception. This periodic approach allows the system to maintain reliable operation switching while minimizing the total time lost, as guard times are inserted only when necessary rather than continuously. The periodic structure enables efficient use of time while ensuring communication reliability.
Data Source
AI summary
This specification provides a method for performing a discovery procedure in a wireless communication system supporting device to device (D2D) communication. The method is performed by first user equipment and includes monitoring a discovery resource region, selecting a discovery resource for sending a discovery message in the discovery resource region, and transmitting the discovery message to second user equipment through the selected discovery resource. The discovery resource region includes a first discovery resource region and a second discovery resource region.