Time Frequency Selective D2D Sidelink Measurements
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
LTE networks face challenges in managing time and frequency selective interference in device-to-device (D2D) communication, which degrades sidelink performance and limits the practical use of D2D communication, especially in LTE Release 12, which does not support measurements for interference management.
Innovation Solution
The implementation of time and frequency selective sidelink measurements for SL-RSRP, SL-RSRQ, and SL-RSSI, configured by the eNB, to characterize and manage interference, allowing for optimized resource allocation and channel access decisions, enabling eNB-controlled D2D communication and UE-autonomous D2D communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If D2D communication is enabled in LTE Release 12, then device-to-device connectivity is achieved, but interference management capability is lacking due to no measurement support
Solution Approach 1:
The patent performs interference measurements and selects D2D resources in advance before actual D2D communication occurs. The eNB configures measurement resources and performs interference assessments proactively, so that when D2D communication needs to start, suitable resources are already identified and ready, avoiding interference issues during actual operation.
Solution Approach 2:
The patent implements a feedback mechanism where measurement results (interference levels on different resources) are reported back to the eNB, which then uses this feedback to make informed decisions about D2D resource allocation. The eNB adjusts resource assignments based on the measured interference conditions, creating a closed-loop system that continuously optimizes D2D communication quality.
2Measurement precision
If time and frequency selective measurements are implemented, then interference characterization improves, but measurement complexity and configuration overhead increase
Solution Approach 1:
The patent divides the measurement process into separate time and frequency components. The eNB configures specific time resources (subframes) and frequency resources (resource blocks) for measurements independently, allowing the system to perform comprehensive two-dimensional interference measurement while managing complexity through modular configuration of time and frequency measurement resources.
3Reliability
If eNB-controlled D2D communication is implemented with measurements, then interference management capability improves, but network control overhead increases
Solution Approach 1:
The patent enables UEs to autonomously perform interference measurements on configured resources and self-select appropriate D2D transmission resources based on measurement results. The eNB only needs to provide initial configuration, after which the UE independently manages resource selection, significantly reducing continuous network control overhead while maintaining effective interference management.
Data Source
AI summary
An electronic device for device-to-device (D2D) communication comprises receive circuitry to receive an indication of D2D resources for D2D communication, and processing circuitry to evaluate a time and frequency selective measurement of one or more of the D2D resources, based on the indication.