TDD Synchronization Detection Using UE Feedback
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Solution Overview
Problem
In TDD-LTE wireless communication systems, synchronization between base stations of different operators is crucial to prevent interference, but existing methods struggle to accurately identify out-of-step cells without third-party testing, and current solutions require additional hardware or significant upgrades.
Innovation Solution
A synchronization detection scheme that allows terminal devices to measure and compare uplink/downlink time slot allocations and frame start times with reference values, enabling effective detection of out-of-step cells without requiring special hardware upgrades, using existing hardware capabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If base stations of multiple operators deploy TDD networks in adjacent frequency bands without synchronization coordination, then device complexity and renovation cost are reduced, but severe interference occurs between operators
Solution Approach 1:
The patent implements a feedback mechanism where user equipment measures the synchronization state of target base stations and reports this information back to the network. The network then uses this feedback to identify and correct out-of-step base stations, creating a closed-loop system that maintains synchronization without requiring complex additional hardware at each base station.
Solution Approach 2:
The patent introduces user equipment as an intermediary element that performs synchronization detection. Instead of requiring direct complex interaction between base stations of different operators, the user equipment acts as a mediator that measures and reports synchronization status, enabling indirect coordination and reducing direct device complexity requirements.
2Measurement precision
If third-party testing is used to detect out-of-step base stations, then measurement precision is improved, but device complexity and operational complexity increase
Solution Approach 1:
The patent enables the network to perform self-diagnosis and self-correction of synchronization issues. User equipment automatically measures and reports synchronization status, and the network autonomously identifies and corrects out-of-step base stations without requiring external third-party testing equipment or manual intervention, thereby maintaining measurement precision while reducing device complexity.
Solution Approach 2:
The patent makes existing user equipment serve multiple functions: normal communication and synchronization detection. By utilizing the existing hardware capabilities of user equipment for both communication and measurement purposes, the system achieves precise measurement without requiring specialized third-party testing devices, thus reducing overall device complexity.
3Object-affected harmful factors
If additional hardware or filters are deployed to reduce interference, then interference between operators is reduced, but device complexity and renovation cost increase
Solution Approach 1:
The patent implements preliminary synchronization detection and coordination before interference occurs. By continuously monitoring synchronization status and proactively identifying out-of-step base stations, the system prevents interference from happening in the first place, eliminating the need for additional hardware filters or interference cancellation equipment.
Solution Approach 2:
The patent replaces physical mechanical solutions (additional filters, guard bands, and hardware modifications) with a software-based synchronization detection and coordination mechanism. The system uses signal processing and information exchange to achieve interference reduction without requiring additional physical hardware components, thereby reducing device complexity and renovation costs.
Data Source
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AI summary
Provided are an electronic device and a method for synchronous detection between time division duplex wireless communication cells. The electronic device can access a communication channel of a time division duplex wireless communication system, and comprises: an acquisition unit which is configured to acquire an actual time slot proportion of a target cell and a cell ID and an operator ID of the target cell at a specific moment; and a reporting unit which is configured to transmit the actual time slot proportion of the target cell and the cell ID and the operator ID thereof to a designee. By means of the technology of this disclosure, networks of different operators can be detected effectively, and by conducting a comparison with a reference time or a coordinated uplink/downlink time slot proportion, a meaningful comparison result is obtained. Moreover, the measurement or comparison result is provided for a third party, such as a network manager, to confirm, so that the result is more credible.