Distributed Antenna Synchronization for Multi-TDD Network Fusion
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Solution Overview
Problem
Current in-network multi-network fusion systems, including active and passive distributed systems, are limited to supporting a single 4G or 5G TDD network, failing to meet the co-network coverage requirements of multiple TDD networks, and require additional devices for signal parsing, increasing cost and complexity.
Innovation Solution
A synchronization method for a distributed antenna system that allows near-end devices to determine frame header information using configuration parameters, transmitting this information to remote units via RF broadcast, and determining synchronization signals without the need for remote devices to parse TDD time-domain parameters, enabling multi-network fusion without additional devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a device configured to parse a special signal is provided for each remote device, then the system can support single TDD network synchronization, but the cost of the remote device is increased and the complexity of the network deployment is added
Solution Approach 1:
The patent extracts the signal parsing function from remote devices and concentrates it in the base station. The base station obtains space signals, determines frame header information, and transmits this processed information to remote devices via RF broadcast, eliminating the need for remote devices to have parsing capabilities.
Solution Approach 2:
The base station acts as an intermediary that processes TDD configuration parameters and frame header information, then transmits this processed information to remote devices. This intermediary role allows remote devices to achieve synchronization without having complex parsing capabilities.
2Reliability
If each remote device has signal parsing capability, then synchronization can be achieved, but the network deployment cost is increased
Solution Approach 1:
The patent removes the expensive signal parsing function from remote devices and relocates it to the base station. Remote devices only need to receive and process frame header information transmitted via RF broadcast, significantly reducing their cost while maintaining synchronization accuracy.
Solution Approach 2:
The base station creates copies of the frame header information and transmits them to multiple remote devices simultaneously via RF broadcast. This allows all remote devices to obtain the necessary synchronization information without each device needing to perform complex parsing operations.
3Adaptability or versatility
If the system supports only a single TDD network, then the remote device cost is reduced, but the system cannot satisfy the co-network coverage requirement of multiple 4G TDDs and 5G TDDs
Solution Approach 1:
The base station is designed with universal functionality to obtain space signals and determine frame header information for multiple different TDD networks (both 4G and 5G). The base station can adapt to different TDD configurations and transmit appropriate frame header information to remote devices, enabling multi-network coverage without increasing remote device complexity.
Solution Approach 2:
The base station dynamically adjusts TDD configuration parameters based on the detected network environment. It can automatically determine the optimal TDD mode (single or multi-TDD) and modify frame header information accordingly, allowing the system to support multiple TDD networks while keeping remote devices simple.
Data Source
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AI summary
The present disclosure relates to a synchronization method for a distributed antenna system. The distributed antenna system includes an access unit and at least one remote unit. The method includes obtaining a configuration parameter of time-division duplexing (TDD), obtaining a space signal according to the configuration parameter to determine first frame header information associated with a first TDD network, transmitting the first frame header information to at least one remote unit, and determining a synchronization signal by the at least one remote unit according to the first frame header information. Then, the remote device 130 may not need the capability of parsing a plurality of TDD time domain parameters. In the synchronization method for the distributed antenna system according to the present disclosure, the remote device may not need the capability of parsing a plurality of TDD time domain parameters and the near-end device can automatically determine the optimal mode that should be currently applied according to the current environment. The synchronization method without any additional device can implement the multi-network fusion to significantly reduce the network deployment cost.