WLAN Multi-Band Reception Using Dynamic RF Band Switching
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Solution Overview
Problem
Next-generation WLAN systems face challenges in improving spectrum efficiency and area throughput, particularly in dense environments with multiple access points and stations, and outdoor scenarios, where existing technologies are not adequately addressing performance enhancements.
Innovation Solution
A method and device for transmitting data through a multi-band by switching at least one antenna or RF chain to a different band in a WLAN system, enabling efficient data transmission by configuring a multi-band operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a single band is used for data transmission in WLAN systems, then device complexity is reduced, but spectrum efficiency and area throughput are limited
Solution Approach 1:
The patent implements multi-band operation where a single RF chain can operate across multiple frequency bands (e.g., 2.4 GHz, 5 GHz, 6 GHz) by dynamically switching its operating band. This allows the wireless device to utilize multiple bands for data transmission, thereby improving spectrum efficiency and area throughput without requiring separate dedicated hardware for each band, thus avoiding increased device complexity
Solution Approach 2:
The patent employs dynamic band switching where the RF chain can change its operating band based on channel conditions, interference levels, and traffic requirements. The device can switch between 2.4 GHz, 5 GHz, and 6 GHz bands dynamically, allowing adaptive optimization of spectrum efficiency while maintaining a fixed hardware configuration, thus resolving the contradiction between productivity improvement and device complexity
2Productivity
If multiple antennas or RF chains are deployed to improve throughput, then area throughput increases, but spatial constraints and device complexity increase
Solution Approach 1:
The patent makes a single RF chain multi-functional by enabling it to operate in multiple frequency bands. Instead of deploying multiple physical RF chains or antennas to increase throughput, the invention allows one RF chain to serve multiple bands (2.4 GHz, 5 GHz, 6 GHz), thereby achieving increased area throughput through spectral diversity rather than spatial multiplication of hardware components
Solution Approach 2:
The patent changes the operating parameter (frequency band) of the RF chain dynamically. By switching the center frequency and bandwidth parameters of a single RF chain, the system can access different spectral resources to improve area throughput. This parameter-based approach avoids the need for additional physical components, thus resolving the spatial constraint issue while maintaining productivity gains
3Productivity
If existing WLAN technologies are used in dense environments, then backward compatibility is maintained, but performance enhancement is insufficient
Solution Approach 1:
The patent implements dynamic band selection and switching capabilities that allow the WLAN system to adapt to different environmental conditions. In dense environments, the system can dynamically switch to less congested bands (e.g., from 2.4 GHz to 5 GHz or 6 GHz) based on real-time channel assessments, thereby achieving performance enhancement while maintaining adaptability to various deployment scenarios including dense, outdoor, and indoor environments
Solution Approach 2:
The patent enables the WLAN system to change operating parameters such as center frequency, bandwidth, and modulation schemes based on environmental conditions. By adjusting these parameters dynamically, the system achieves superior performance in dense and outdoor environments compared to existing technologies, while still maintaining backward compatibility through standardized parameter sets defined in IEEE 802.11 standards
Data Source
AI summary
Provided are a method and device for receiving data in a wireless LAN system. Particularly, an STA transmits an operating band negotiation request frame to an AP by means of a first band supported by first and second RFs. The STA receives an operating band negotiation response frame from the AP by means of the first band as a response to the operating band negotiation request frame. The STA changes the first band supported by the second RF into a second band on the basis of the operating band negotiation request frame and the operating band negotiation response frame. The STA receives first data from the AP by means of the first band supported by the first RF and the second band supported by the second RF. The first data is transmitted by means of a multi-band in which the first band and the second band are combined.