Small Cell Activation via UE Proximity Detection
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Solution Overview
Problem
Current wireless communication systems, particularly in LTE technology, face challenges in efficiently managing small cell activation states, which affects the overall performance and capacity of mobile broadband access as demand increases.
Innovation Solution
A method and apparatus for activating a low power node, such as a small cell, by receiving activation parameters and detecting the proximity of an active user equipment (UE) based on these parameters, initiating an activation sequence after detection, using existing physical uplink channels like PRACH or SRS transmissions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If small cells are activated continuously to ensure network coverage and capacity, then network performance and capacity are improved, but energy consumption increases
Solution Approach 1:
The patent implements dynamic activation of small cells based on real-time detection of UE proximity. Small cells transition between active and dormant states according to whether active UEs are detected in their coverage areas. This dynamic state change allows the system to adapt network capacity to actual demand, maintaining high productivity when needed while reducing energy consumption during low-traffic periods.
Solution Approach 2:
The system enables small cells to autonomously determine their activation state by detecting UE proximity signals themselves, without requiring continuous centralized control. Each small cell monitors for uplink signals from nearby UEs and independently decides whether to activate, reducing overall system complexity and enabling energy-efficient autonomous operation.
2Use of energy by moving object
If small cells are activated on demand based on UE proximity detection, then energy consumption is reduced, but activation response time may increase
Solution Approach 1:
The system performs preliminary actions by continuously monitoring for UE proximity signals even when small cells are in dormant state. Upon detecting an active UE, the activation sequence is immediately initiated, reducing the effective response time. The detection mechanism is pre-configured with activation parameters that enable rapid decision-making without requiring complex real-time analysis.
Solution Approach 2:
The system establishes a feedback loop where UE proximity detection triggers activation decisions. Uplink signals from UEs serve as feedback indicators that automatically initiate the activation sequence. This feedback mechanism ensures timely activation response while maintaining energy efficiency, as activation occurs only when and where actually needed.
3Measurement precision
If activation parameters are continuously monitored to detect UE proximity, then activation accuracy is improved, but signaling overhead increases
Solution Approach 1:
The patent extracts only the essential information needed for activation decisions from uplink signals. Instead of continuously monitoring all signal parameters, the system focuses on detecting the presence and strength of specific uplink signals (such as random access preambles or scheduled uplink transmissions) that indicate active UE proximity. This selective extraction maintains detection accuracy while minimizing signaling overhead.
Solution Approach 2:
The system utilizes existing uplink signaling resources for dual purposes: normal communication and UE proximity detection for activation. By making the detection mechanism universal and based on standard uplink signals rather than dedicated detection signals, the patent avoids additional signaling overhead while maintaining accurate proximity detection capability.
Data Source
AI summary
A method of wireless communication includes receiving activation parameters at a low power node and detecting a proximity of an active user equipment (UE) based at least in part on the activation parameters. The activation parameters are triggered from a node different from the low power node, such as an eNodeB. The low power node initiates an activation sequence after detecting the active UE.