Dynamic Energy Detection Threshold for Unlicensed Spectrum Coexistence
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Solution Overview
Problem
The existing technologies face challenges in optimizing the use of unlicensed spectrum in wireless communication systems without significant changes to existing standards and chips, particularly in ensuring fair and effective coexistence with LTE systems.
Innovation Solution
The proposed solution involves an electronic device and a wireless communication method that dynamically adjust the energy detection threshold for unlicensed frequency bands, allowing user equipment to perform energy detection based on varying threshold information, thereby optimizing spectrum use without altering existing standards and chips.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If time division multiplexing is used for LTE and WiFi systems to share unlicensed spectrum, then spectrum coexistence is improved, but system complexity and synchronization requirements increase
Solution Approach 1:
The patent changes the energy detection threshold parameter dynamically based on channel conditions and system state. The base station configures different threshold values for user equipment to detect WiFi signals, allowing the system to adapt to varying spectral environments without requiring complex synchronization mechanisms. This parameter adjustment enables flexible coexistence while maintaining simple system operation.
2Productivity
If LTE systems transmit WiFi signals to enable time division multiplexing, then spectrum sharing is improved, but standard compatibility and implementation complexity increase
Solution Approach 1:
The patent introduces energy detection threshold configuration as an intermediary mechanism between LTE and WiFi systems. Instead of requiring LTE to transmit actual WiFi signals or implement complex inter-system coordination, the base station provides threshold guidance to user equipment, which then autonomously detects WiFi presence and adjusts transmission accordingly. This intermediary approach achieves spectrum sharing without modifying core LTE standards or requiring direct LTE-WiFi interaction.
Solution Approach 2:
User equipment is empowered to autonomously detect WiFi signals and determine transmission opportunities based on configured energy detection thresholds. Each user equipment independently monitors the unlicensed channel and makes local decisions about when to transmit, eliminating the need for centralized coordination or complex inter-system signaling. This self-service mechanism simplifies implementation while enabling effective spectrum sharing.
3Measurement precision
If dynamic energy detection threshold adjustment is implemented, then spectrum detection accuracy is improved, but signaling overhead and processing complexity increase
Solution Approach 1:
The patent implements dynamic adjustment of energy detection thresholds based on real-time channel conditions and system state. The base station configures different threshold values corresponding to different detection scenarios (e.g., busy vs. idle channel conditions). This dynamic approach allows user equipment to accurately detect WiFi signals across varying environmental conditions while maintaining manageable signaling overhead through predefined threshold configurations.
Data Source
AI summary
An electronic equipment in a wireless communication system, and a wireless communication method. The wireless communication system includes at least one first cell and at least one second cell, and at least one of the second cells is operating in an unlicensed band. The electronic equipment includes one or more processing circuits configured to perform: configuring for a user equipment at least one second cell operating in an unlicensed band to perform carrier aggregation communication; and generating, dynamically or semi-statically, energy detection threshold information for each second cell operating in the unlicensed band so that the user equipment can perform energy detection on the unlicensed band according to the energy detection threshold information.