CATV Tap-Off Device Wireless LAN Coverage Extension
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Solution Overview
Problem
Existing CATV network systems face challenges in extending wireless LAN coverage beyond building perimeters and achieving comprehensive indoor and outdoor coverage due to signal attenuation by building materials and interference from other devices.
Innovation Solution
A system utilizing a CATV tap-off device with a signal splitter and transceivers, coupled with a CATV gateway device, to split CATV signals into television and data signals, converting the data signals into wireless communications, and using band reject filters to isolate frequency spectra, enabling reliable wireless and wired network coverage within and around properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If WiFi devices are used to extend wireless LAN coverage, then wireless access is provided within building perimeter, but signal attenuation by walls significantly reduces coverage extent into the building
Solution Approach 1:
The system divides the wireless network into multiple segments by deploying multiple CATV tap-off devices at different locations (exterior and interior of buildings). Each tap-off device creates a local wireless coverage zone, segmenting the overall network coverage area to overcome wall attenuation limitations.
Solution Approach 2:
CATV tap-off devices serve as intermediary nodes between the main CATV network and wireless devices. These intermediaries receive signals through coaxial cables (which penetrate walls effectively) and convert them to wireless signals, bridging the gap between wired network infrastructure and wireless coverage requirements.
2Length of moving object
If multiple CATV tap-offs are connected along a corridor to create wireless LAN, then wireless access is extended, but coverage into adjacent buildings remains limited
Solution Approach 1:
The system transitions from linear corridor-based coverage to three-dimensional building-wide coverage by strategically placing tap-off devices at multiple vertical and horizontal locations throughout the building, utilizing the building's spatial dimensions to expand coverage areas.
3Reliability
If band reject filters are used to isolate frequency spectra, then interference is reduced, but device complexity increases
Solution Approach 1:
The CATV tap-off devices are designed to perform multiple functions simultaneously: signal distribution, frequency filtering, and wireless signal generation. This multi-functionality reduces the need for separate filtering devices, thereby reducing overall system complexity while maintaining reliable interference rejection.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution provides a more comprehensive and reliable wireless and wired communication network, enhancing coverage and reducing interference by separating frequency bands, allowing for broader distribution of data signals and improved wireless access point performance.
Implementation Method 1
The CATV gateway device includes a second signal transceiver and is configured to split the CATV signal into a television signal and a baseband data signal
Implementation Method 2
The second signal transceiver is configured to communicate the baseband data signal as a transceiver signal over the first coaxial cable to the first signal transceiver
Implementation Method 3
The tap-off access point is configured to transmit a first wireless signal based on the transceiver signal
Data Source
AI summary
In one embodiment, a system for providing data communication services includes a cable television (CATV) tap-off device including a signal splitter communicably coupled to a tap-off access point and a first signal transceiver, the CATV tap-off device being configured to communicate a CATV signal with a CATV network through the splitter; and a CATV gateway device communicably coupled to the signal splitter through a first coaxial cable to communicate the CATV signal with the CATV tap-off device. The CATV gateway device is configured to split the CATV signal into a television signal and a baseband data signal. A second signal transceiver of the CATV gateway device is configured to communicate the baseband data signal as a transceiver signal over the first coaxial cable to the first signal transceiver. The tap-off access point is configured to wirelessly transmit a first wireless signal based on the transceiver signal.