Multiplexing Apparatus with Automated DC Bypass Control
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Solution Overview
Problem
The complexity of wiring and variable requirements in cell site installations for shared wireless network infrastructure lead to installation delays and increased costs due to incorrect connections and wiring of multiplexing equipment, particularly with conventional hardwired DC and low-frequency signal bypass paths.
Innovation Solution
The implementation of multiplexing apparatus with active loads and automated control mechanisms that determine and manage DC and control signal bypass paths based on electrical measurements, ensuring correct connections and preventing incorrect installations by 'tricking' BTSs into detecting proper DC supply, thereby reducing errors and alarms.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If conventional hardwired DC and low-frequency signal bypass paths are used in multiplexing apparatus, then DC power and control signals can be supplied to RF equipment at the top of the mast, but the complexity of wiring and variable requirements lead to installation delays and increased costs due to incorrect connections
Solution Approach 1:
The multiplexing apparatus automatically detects which channel connection ports require DC power supply and configures the bypass paths without installer intervention. The control means monitors electrical values at each port and autonomously enables or disables bypass paths, eliminating the need for installers to manually configure complex wiring arrangements and reducing installation errors.
Solution Approach 2:
The system changes its operational parameters dynamically based on detected electrical conditions. The control means adjusts the state of bypass paths (enabled/disabled) according to the electrical values measured at each channel connection port, allowing the apparatus to adapt to different installation scenarios automatically rather than requiring fixed hardwired configurations.
2Productivity
If manual configuration of bypass paths is used, then installers can connect multiplexing equipment, but the variable requirements and complexity lead to incorrect wiring and installation delays
Solution Approach 1:
The control means continuously monitors electrical values at each channel connection port and uses this feedback to automatically configure the bypass paths. This closed-loop control ensures that DC power is supplied only to ports that require it, eliminating incorrect connections and reducing installation delays caused by manual configuration errors.
Solution Approach 2:
The apparatus performs self-configuration by automatically detecting which ports need DC power and enabling the appropriate bypass paths without installer intervention. This eliminates the reliability issues associated with manual configuration while maintaining installation speed.
3Adaptability or versatility
If DC power is supplied to all channel connection ports, then all BTSs can operate, but this causes false alarms when multiple BTSs detect DC supply but only one is actually connected
Solution Approach 1:
The system provides DC power supply capability locally at each channel connection port based on actual requirements. The control means enables bypass paths only for specific ports that are detected to be connected to RF equipment requiring DC power, rather than enabling DC supply system-wide. This prevents false alarms while maintaining the flexibility to supply power to any port as needed.
Solution Approach 2:
The system dynamically changes the DC power supply state for each channel connection port based on detected electrical conditions. When a port is detected to be connected to equipment requiring DC power, the bypass path is enabled; when no equipment is detected, the bypass path remains disabled. This prevents false alarms while maintaining adaptability to different connection scenarios.
Data Source
Figure 1
Figure 2
Figure 3a~3b
AI summary
This invention relates to multiplexing apparatus and to a method of use thereof, and particularly to multiplexing apparatus of a type for combining and/or splitting radio frequency (RF) signals. The apparatus and method can be used and performed at a cell site arrangement and location to allow the apparatus to be set up for use in an efficient manner and allows the reliable operation of the apparatus whilst minimising the triggering of false alarm signals.