Communication Device Timing Synchronization in Unlicensed Bands
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Solution Overview
Problem
Existing wireless communication technologies face challenges in effectively utilizing radio wave resources, particularly in unlicensed bands where multiple communication standards coexist, leading to communication errors and quality deterioration due to collisions, resulting in inefficient use of resources.
Innovation Solution
A communication system that includes an acquisition unit for obtaining timing information from a different frequency band and a communication control unit to manage communication in a predetermined scheme, using a main channel for accurate timing information and sub-channels for control information, allowing multiple communication devices with different standards to cooperate and optimize resource use.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple communication devices with different communication standards freely perform communication in unlicensed bands, then communication flexibility and device compatibility are improved, but communication errors due to collisions and deterioration of communication quality occur frequently
Solution Approach 1:
The patent introduces a timing synchronization signal as an intermediary element that mediates between multiple communication devices using different standards. This signal provides a common timing reference that enables devices to coordinate their transmissions, reducing collisions while maintaining compatibility across different communication standards.
Solution Approach 2:
The patent changes the timing parameter of communication transmissions by synchronizing devices to a common timing reference. This parameter change allows devices to transmit at coordinated times, preventing collisions and improving communication reliability while maintaining the ability to use different communication standards.
2Device complexity
If timing synchronization is achieved within the same frequency band, then communication coordination is simplified, but interference from other communications in the same band prevents accurate timing acquisition
Solution Approach 1:
The patent moves the timing synchronization signal to a different frequency band dimension, separate from the data communication band. This dimensional separation allows timing signals to be transmitted and received without interference from data communications, achieving accurate timing acquisition while keeping the system relatively simple.
3Measurement precision
If a frequency band is dedicated solely for timing information transmission, then timing accuracy is improved, but loss of frequency resources for data communication occurs
Solution Approach 1:
The patent segments the frequency spectrum into different functional bands: one band dedicated to timing synchronization signals and another band for data communication. This segmentation allows timing signals to be transmitted with high accuracy without permanently dedicating the entire spectrum, as the timing band can be used for its specific purpose while the data band remains available for communication.
Solution Approach 2:
The timing synchronization signal is transmitted periodically rather than continuously. This periodic transmission ensures accurate timing information is available to devices while allowing the frequency resources to be used for data communication during intervals between timing signal transmissions, optimizing resource utilization.
Data Source
AI summary
A communication device includes an acquisition unit configured to acquire first information for communication in which a first frequency band has been used, the first frequency band being an unlicensed band in which a plurality of communication schemes can be mixed, from a second frequency band different from the first frequency band, and a communication control unit configured to control communication in a predetermined communication scheme in which the first frequency band has been used, on the basis of the first information.