D2D Resource Measurement via Two-Stage Signal Detection
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently managing device-to-device (D2D) communication resources, leading to network overload, reduced data transmission speed, and suboptimal resource allocation due to the lack of effective measurement methods for D2D resource utilization.
Innovation Solution
A method for D2D resource measurement in user equipment, involving a first measurement to detect energy or discovery signals in allocated resource regions, followed by a second measurement to assess signal strength and quality, allowing for dynamic adjustment of transmission periodicity and resource allocation based on preset thresholds.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If D2D communication is introduced to reduce network overload, then network capacity and data transmission speed are improved, but resource allocation efficiency deteriorates due to lack of effective measurement methods
Solution Approach 1:
The patent segments the measurement process into two distinct stages: a first measurement stage that performs comprehensive measurements across all allocated resource regions, and a second measurement stage that performs targeted measurements only in resource regions estimated to contain discovery signals. This segmentation reduces overall measurement complexity while maintaining measurement accuracy for D2D resource allocation.
2Measurement precision
If comprehensive measurement is performed on all resource regions, then measurement accuracy is improved, but measurement time and energy consumption increase
Solution Approach 1:
The patent performs a first measurement across all resource regions to obtain preliminary measurement results before performing the second measurement. This preliminary action allows the system to identify candidate resource regions that require further detailed measurement, thereby reducing the total measurement time while maintaining detection accuracy.
Solution Approach 2:
The patent applies partial measurement by performing comprehensive measurements in the first stage across all resource regions, then performing selective partial measurements only in estimated discovery signal regions in the second stage. This approach avoids excessive full-scale measurements while ensuring accurate detection where needed.
3Productivity
If D2D resource allocation is increased to improve communication capacity, then network capacity is improved, but network load and interference increase
Solution Approach 1:
The patent implements a feedback mechanism where measurement results from both the first and second measurements are used to dynamically adjust D2D resource allocation. The system estimates discovery signal presence based on first measurement results, then performs second measurements to refine resource allocation decisions, creating a closed-loop feedback system that optimizes capacity while managing interference.
Data Source
AI summary
A method for a device-to-device (D2D) communication in a wireless communication system is discussed. The method performed by a user equipment (UE) includes measuring a D2D received signal strength indicator (RSSI) for each resource region for the D2D communication, the D2D RSSI representing a received signal strength per symbol in the resource region; obtaining ratio information indicating a ratio of D2D resource regions having a higher D2D RSSI than a specific threshold within a resource pool for the D2D communication; and transmitting a measurement report including the ratio information to a base station.