Sub1G Signal Extension for WLAN Range and Interference
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Solution Overview
Problem
Conventional WLAN systems face limitations in range and interference, particularly in the 2.4 and 5 GHz bands, which restrict their ability to meet growing user demands for bandwidth and connectivity without requiring significant adjustments to existing user devices.
Innovation Solution
Employing a Sub1G signal in the range of approximately 500 MHz or 800 MHz, which offers a path loss advantage and reduced interference, using existing 2.4G or 5G Wireless LAN chipsets with RF Up/Down Converters to create long-range bridges, extenders, clients, and hotspots, and integrating Sub1G functionality into next-generation routers and repeaters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional 2.4 GHz or 5 GHz WLAN systems are used, then existing user devices can be supported, but the range is limited and interference is high
Solution Approach 1:
The patent changes the frequency parameter from conventional 2.4 GHz or 5 GHz to Sub1G frequencies (below 1 GHz). This parameter change fundamentally alters the propagation characteristics of the wireless signal, enabling much longer transmission distances while reducing interference. The lower frequency Sub1G signals experience less path loss and can penetrate obstacles more effectively, thereby extending WLAN range without compromising communication quality.
Solution Approach 2:
The patent introduces Sub1G frequency band as an intermediary communication channel between access points and client devices. This intermediary frequency band serves as a bridge that overcomes the limitations of higher frequency bands, providing extended range while maintaining compatibility with existing WLAN protocols and devices through dual-band operation.
2Productivity
If higher frequency bands (5 GHz) are used, then bandwidth is improved, but range is significantly reduced
Solution Approach 1:
The patent segments the WLAN communication into two distinct frequency segments: Sub1G band for long-range communication and 5 GHz band for high-bandwidth applications. Access points and clients can operate on both bands simultaneously, using Sub1G for control traffic and data transmission over distance, while 5 GHz provides supplemental bandwidth capacity when devices are in proximity, thus resolving the trade-off between range and bandwidth.
Solution Approach 2:
The patent adds another dimension to WLAN operation by utilizing the Sub1G frequency spectrum, which operates in a different dimensional space compared to conventional 2.4 GHz and 5 GHz bands. This additional frequency dimension provides unique propagation characteristics that complement higher bands, enabling simultaneous optimization of both range and bandwidth through multi-band operation.
3Length of stationary object
If Sub1G frequency is used, then range is extended significantly, but compatibility with existing devices requires adjustment
Solution Approach 1:
The patent implements multi-functionality in WLAN devices by enabling operation across multiple frequency bands (Sub1G, 2.4 GHz, and 5 GHz). Access points and client devices are designed to support both conventional bands and Sub1G band, allowing them to automatically select the optimal frequency for communication based on distance, interference conditions, and device capabilities. This universal design ensures backward compatibility while enabling extended range through Sub1G operation.
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
Sub1G technology provides a significant range extension (up to 4 times that of 5 GHz systems) with reduced interference, enabling better Quality of Service (QoS) for applications like VoIP and gaming, while being compatible with existing devices and infrastructure.
Implementation Method 1
Employing a Sub1G signal in the range of approximately 500 MHz or 800 MHz, which offers a path loss advantage
Data Source
AI summary
Various embodiments disclose systems and methods for employing a Sub1G signal (e.g. a signal in the range of approximately 500 Mhz or 800 mHz) for use with internal and/or external components of various user devices. The Sub1G region may provide a path loss advantage over traditional 2.4 and 5 Ghz systems because of the lower frequency in free-space path loss model. Sub 1G may also present less interference compared to 2.4 GHz (e.g., better QoS for applications such as VOIP, Gaming, etc.). In some of the disclosed embodiments, Sub1G may be employed using current 2.4G or 5G Wireless LAN chipset with RF Up/Down Converters. In some embodiments, the Sub1G approach may be used to create a Long Range Bridge, Long Range Extender, Long Range Client, Long Range Hotspot, etc.