D2D Interference Reduction via UE Feedback Resource Reallocation
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Solution Overview
Problem
In wireless communication systems supporting Device-to-Device (D2D) communication, interference occurs due to resource collisions during D2D discovery or direct communication between User Equipments (UEs), degrading the performance of D2D communication.
Innovation Solution
A method where a UE receives a D2D signal, determines if interference is generated from the resource used, and transmits interference resource information to change the transmission resources, thereby reducing interference by reallocating resources if necessary.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple UEs select the same resources for D2D discovery or direct communication, then resource utilization is improved, but interference is generated and D2D communication performance is degraded
Solution Approach 1:
The patent implements a feedback mechanism where UEs transmit interference resource information to the network entity (eNodeB) when interference is detected. The network entity uses this feedback to reallocate resources, thereby dynamically adjusting resource assignment based on actual interference conditions and improving overall system performance
Solution Approach 2:
The patent enables UEs to autonomously detect interference on their own transmitted resources and report this information to the network entity. This self-service approach allows each UE to monitor and report its own interference conditions without requiring complex centralized monitoring, thereby improving resource utilization while managing interference
2Reliability
If UEs autonomously detect and report interference resources, then interference management is improved, but device complexity and signaling overhead increase
Solution Approach 1:
The patent implements partial action by having UEs report interference information only when interference is actually detected above a certain threshold, rather than continuously reporting all resource conditions. This reduces signaling overhead while maintaining reliable interference management by focusing reports on problematic cases
Solution Approach 2:
The patent changes the parameter of interference reporting from continuous to event-driven, where reports are triggered only when specific conditions (interference detection) are met. This parameter change reduces signaling overhead while maintaining interference management reliability by reporting only when necessary
Data Source
AI summary
The present invention discloses a method for reducing interference in a wireless communication system supporting D2D communication and an apparatus for the method. More specifically, in a wireless communication system supporting Device-to-Device (D2D) communication, a method for reducing interference in D2D communication comprises receiving, by a user equipment (UE), a D2D signal; determining, by the UE, whether interference is generated from resources in which the D2D signal has been transmitted; and in case it is determined that interference is generated from the resources in which the D2D signal has been transmitted, transmitting, by the UE, interference resource information for indicating that interference has been generated from the resources in which the D2D signal has been transmitted.