Terminal Uplink Power Control Under Regional SAR Limits
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Solution Overview
Problem
The challenge of balancing high-power terminal operations with Specific Absorption Ratio (SAR) compliance in various regions, particularly in TDD frequency bands, is not adequately addressed by existing technologies, leading to potential violations of regional SAR limits.
Innovation Solution
A method and device that provide network devices and terminals with specific absorption ratio limit information and uplink resource control, allowing terminals to adjust power or resources to meet regional SAR requirements without restricting uplink configurations, ensuring compliance with SAR limits while maintaining operational efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the transmitting power of the terminal is increased to improve uplink coverage and rate, then the uplink performance is improved, but the SAR value increases and may violate regional SAR limits
Solution Approach 1:
The patent implements dynamic power control where the terminal adjusts its transmitting power based on real-time SAR monitoring and network feedback. The system transitions from static power settings to dynamic adjustment, allowing the terminal to operate at high power when SAR is low and reduce power when SAR approaches limits, thus resolving the contradiction between uplink performance and SAR compliance
Solution Approach 2:
The patent establishes a feedback mechanism where the terminal monitors its own SAR value and reports to the network, while the network provides power control commands based on this information. This closed-loop feedback system enables continuous adjustment of transmitting power to maintain SAR compliance while optimizing uplink performance
2Object-affected harmful factors
If power control commands are frequently adjusted to meet SAR limits, then SAR compliance is improved, but the complexity of power management increases
Solution Approach 1:
The patent implements self-service mechanisms where the terminal autonomously monitors its SAR value and generates power control commands based on pre-configured thresholds and algorithms. This reduces the complexity of centralized power management by enabling the terminal to self-regulate within SAR limits without requiring complex external control systems
Data Source
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AI summary
An information transmission method, a device, a network device and a terminal are provided. The method includes: sending first indication information to a terminal, where the first indication information includes at least one of: location area identity information of the network device, information of current uplink and downlink configuration of the network device, specific absorption ratio limit information, uplink resource control information, and first time window configuration information configured to indicate a duration of a first time window.