Distributed Antenna Synchronization for Multi-TDD Network Coverage
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Solution Overview
Problem
Current distributed antenna systems primarily support single 4G TDD or 5G TDD networks, failing to meet the requirements for multi-TDD network integration and multi-mode wireless network coverage in the 5G era, and also struggle with high-bandwidth data transmission using digital fiber optics, leading to increased hardware costs.
Innovation Solution
A distributed antenna system with a synchronization module that enables synchronization across multiple TDD networks, utilizing analog optical fiber for high-bandwidth connections, allowing simultaneous processing of multiple TDD signals and supporting a combination of 4G and 5G networks, along with FDD networks, through adaptive tracking and synchronization switching.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a distributed antenna system supports multiple TDD networks (4G and 5G), then multi-network integration coverage is improved, but device complexity increases due to synchronization requirements
Solution Approach 1:
The distributed antenna system employs a universal synchronization module that can handle multiple TDD network types (4G and 5G) through a single integrated design. The module parses TDD signals and extracts synchronization information applicable to different network standards, eliminating the need for separate synchronization mechanisms for each network type and thus reducing overall device complexity while maintaining multi-network support.
Solution Approach 2:
The system dynamically adjusts synchronization parameters based on the detected network type. The synchronization module modifies its operation mode according to whether it is receiving 4G or 5G TDD signals, adapting the synchronization timing and processing parameters accordingly. This dynamic parameter adjustment enables the system to maintain simplicity while supporting multiple network standards.
2Power
If digital fiber optics are used for high-bandwidth data transmission, then transmission capacity is improved, but hardware costs increase
Solution Approach 1:
The patent replaces the digital fiber optic transmission system with an analog optical fiber-based transmission system. Instead of using digital signals that require complex digital signal processing and expensive digital fiber infrastructure, the system uses analog optical signals that can be directly transmitted over existing analog optical fibers. This substitution significantly reduces hardware costs while maintaining high-bandwidth transmission capability, as the analog approach eliminates the need for expensive digital conversion equipment.
3Adaptability or versatility
If the system processes multiple TDD signals simultaneously, then multi-mode network support is improved, but signal processing complexity increases
Solution Approach 1:
The signal processing system is segmented into dedicated processing channels for different network types. The synchronization module first identifies whether the input signal is 4G or 5G TDD, then routes it to the appropriate processing channel. This segmentation allows the system to process multiple TDD signals simultaneously without requiring a single complex universal processor, as each channel can be optimized for its specific network type, thereby reducing overall processing complexity.
Solution Approach 2:
The synchronization module performs preliminary action by parsing and analyzing the TDD signal structure before the main signal processing begins. It extracts synchronization information and network type identification data in advance, which then guides the subsequent signal processing operations. This preliminary analysis allows the system to prepare processing parameters beforehand, reducing the complexity of real-time multi-mode signal processing.
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
Enables simultaneous processing of multiple TDD signals, supports co-site and co-location coverage for multi-mode TDD networks, and achieves high-bandwidth extended remote coverage, reducing hardware costs by using analog optical fiber for extended remote applications.
Implementation Method 1
an optical module, communicatively connected to the first signal processing module and coupled with the at least one remote unit via an analog optical fiber
Data Source
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AI summary
The present disclosure relates to a distributed antenna system including at least one remote unit and a first access unit. The first access unit includes one or more frequency sub-boards, a first synchronization module, and a first signal processing module. At least one frequency sub-board of the one or more frequency sub-boards is configured to receive a time-division duplexing (TDD) signal. The first synchronization module is configured to be communicatively connected to the frequency sub-board receiving the TDD signal. The first signal processing module is communicatively connected to the first synchronization module and configured to process the TDD signal received via the at least one frequency sub-board.