D2D Signal Sending With Adaptive Power Spectral Density Control
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Solution Overview
Problem
Existing device-to-device (D2D) communication technologies face challenges in efficiently managing power spectral density for signal transmission, leading to interference and suboptimal radio resource utilization.
Innovation Solution
A method and apparatus for determining an upper power spectral density limit and/or power spectral density based on various relationships and information, such as RSRP, pathloss, service type, and channel busy degree, to control signal transmission and minimize interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If device-to-device (D2D) communication is implemented for direct data transmission between terminals, then transmission efficiency and speed are improved, but interference management and power spectral density control become more complex
Solution Approach 1:
The patent replaces complex mechanical interference management with electromagnetic field-based power spectral density control. By calculating and controlling PSD based on pathloss models and received signal strength measurements, the system achieves interference management through field-based parameters rather than complex protocol-based mechanisms, thus improving transmission efficiency while managing complexity.
Solution Approach 2:
The patent dynamically adjusts power spectral density parameters based on channel conditions, pathloss, and received signal strength. By changing PSD parameters adaptively rather than using fixed transmission protocols, the system optimizes transmission efficiency while simplifying interference management through parameter-based control.
2Reliability
If power spectral density is increased to improve signal transmission quality, then signal reliability is improved, but interference to other transmissions increases
Solution Approach 1:
The patent implements feedback mechanisms where terminals measure received signal strength and pathloss, then adjust their power spectral density accordingly. This closed-loop feedback system ensures that signal transmission quality is maintained while automatically reducing interference when channel conditions indicate other transmissions are present, thus resolving the contradiction between reliability and interference generation.
Solution Approach 2:
The patent makes power spectral density dynamic rather than static, adjusting it based on real-time channel conditions, pathloss calculations, and received signal strength measurements. This dynamic adaptation allows the system to maintain high signal quality when needed while automatically reducing interference levels when other transmissions are detected, resolving the contradiction between these two objectives.
Data Source
AI summary
Provided are a signal sending method and apparatus, a terminal, and a network-side device. The signal sending method includes: determining an upper power spectral density limit and/or a power spectral density for sending a first signal, by a first terminal based on first information; and sending, by the first terminal, the first signal based on the upper power spectral density limit and/or the power spectral density.