Dual-band Wireless System Using Lower Frequency for Initial Synchronization
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current wireless communication systems face interference and limited throughput due to the crowding of unlicensed frequency bands like 2.4 GHz and 5.0 GHz, necessitating the exploration of higher frequency bands for Gbps communications, but these bands offer narrower beamwidths and shorter ranges, increasing the complexity of device synchronization and reducing data transmission efficiency.
Innovation Solution
Implementing a dual-frequency band communication system where a lower frequency band with broader beamwidth is used for initial communication and coarse configuration, followed by a higher frequency band with narrower beamwidth for finer configuration and data transmission, utilizing multi-element antennas to adaptively control beamwidth and facilitate communication across different frequency bands.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If higher frequency bands (>20 GHz) are used for Gbps communications, then data throughput is improved, but beamwidth becomes narrower and communication range is reduced
Solution Approach 1:
The communication system is segmented into multiple frequency band components, each serving different functions. Lower frequency bands (e.g., 2.4 GHz, 5 GHz) handle initial access, control signaling, and wide-area coverage, while higher frequency bands (>20 GHz) are dedicated to high-throughput data transmission. This segmentation allows each band to operate optimally within its strengths, resolving the contradiction between range and throughput.
Solution Approach 2:
The patent introduces a frequency dimension to resolve the spatial contradiction. By adding frequency as an additional dimension for communication (using multiple bands simultaneously or sequentially), the system achieves both wide coverage (via lower bands) and high throughput (via higher bands) without being constrained by the inverse relationship between frequency and beamwidth in a single dimension.
2Productivity
If higher frequency bands are used for communications, then data throughput is improved, but synchronization complexity increases
Solution Approach 1:
Synchronization and configuration actions are performed preliminarily using lower frequency bands before activating higher frequency bands. The system establishes timing, frequency, and spatial synchronization through control signaling in the lower bands, then uses this pre-established synchronization framework to enable high-throughput communication in the higher bands. This preliminary action reduces the complexity of synchronizing high-frequency signals.
Solution Approach 2:
Lower frequency bands serve as an intermediary layer that mediates between the control plane and high-throughput data plane. The intermediary band performs coarse beamforming, initial synchronization, and device configuration, which then enables the higher frequency bands to operate with reduced synchronization overhead and complexity.
3Length of moving object
If lower frequency bands are used for initial communication, then communication range is improved, but data throughput is limited
Solution Approach 1:
The communication system segments different functional requirements across frequency bands. Lower frequency bands are assigned to functions requiring wide coverage and long range (initial access, control signaling, device discovery), while higher frequency bands are assigned to functions requiring high data rates (bulk data transfer, video streaming). This functional segmentation resolves the contradiction by matching each band's characteristics to appropriate applications.
Solution Approach 2:
The system dynamically transitions devices between different frequency bands based on communication phase and requirements. During initial access and control phases, lower bands provide wide coverage. Once connected, the system dynamically switches to higher bands for high-throughput data transmission, and can dynamically adjust beamforming and resource allocation based on real-time channel conditions and traffic demands.
Data Source
AI summary
Systems that communicate in a wireless network using a first and a second frequency band are described herein. The systems may use the first frequency band to transmit or receive a control signal, enabling subsequent communication using the second frequency band.