RRU Optical Interface Self-Adaptation for Network Topology
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Solution Overview
Problem
The fixed locations of upper and lower connection optical interfaces in Radio Remote Units (RRUs) restrict flexibility in network topologies, lead to incorrect link establishment during fiber connection, and limit adaptability, especially in ring networking and increased processing capabilities.
Innovation Solution
A self-adapting method for determining and switching the upper and lower connection flag bits of optical interfaces, using a phase-locked clock reference resource, which initiates signal transmission only after the phase-locked loop is locked, allowing for dynamic identification and reconfiguration of optical interfaces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the upper and lower connection optical interfaces are fixed to specific physical locations, then the device structure is simple and easy to manufacture, but the adaptability to different network topologies is restricted and incorrect link establishment may occur during fiber connection
Solution Approach 1:
The patent implements dynamic identification of optical interface roles (upper/lower connection) through self-adaptive algorithms that determine interface functionality based on signal detection and negotiation, rather than fixed physical assignments. This allows the system to adapt to different network topologies (star, chain, ring, multi-point) while maintaining a relatively simple physical structure.
Solution Approach 2:
The system changes the functional parameters of optical interfaces dynamically through self-adaptive algorithms that adjust interface roles based on detection results. The interface can switch between upper connection, lower connection, or idle states based on signal presence and negotiation outcomes, enabling versatility without complex physical reconfiguration.
2Device complexity
If the upper and lower connection optical interfaces are fixed to specific physical locations, then the device structure is simple, but engineering construction becomes difficult when optical fiber is incorrectly connected
Solution Approach 1:
The system performs self-identification and self-configuration of optical interface roles through automated detection algorithms. During initialization, the RRU automatically detects which optical interfaces are connected and determines their roles (upper/lower connection) without manual configuration, enabling easy engineering construction even with simple device structure.
Solution Approach 2:
The system uses feedback from optical signal detection and negotiation results to automatically adjust interface role assignments. When optical fibers are connected, the system detects signal presence and uses negotiation outcomes to determine correct interface pairing, providing automatic correction for incorrect connections without increasing device complexity.
3Device complexity
If the upper and lower connection optical interfaces are fixed, then the device structure is simple, but real-time self-adaptation is required to ensure communication is not interrupted by hot swap of optical fibres
Solution Approach 1:
The system performs preliminary detection and role assignment of optical interfaces during initialization before actual communication begins. This preliminary self-configuration establishes the correct upper/lower connection relationships in advance, ensuring reliable communication from the start and preparing the system for potential hot swaps without requiring complex real-time reconfiguration mechanisms.
Solution Approach 2:
The system continuously monitors optical signal status and uses feedback from signal detection and negotiation to maintain correct interface role assignments. When hot swaps occur, the feedback mechanism detects signal changes and automatically re-establishes proper connections, ensuring communication reliability without significantly increasing device complexity.
Data Source
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AI summary
A Radio Remote Unit (RRU) and a self-adapting method for upper and lower connections of optical interfaces thereof are disclosed, which are used for resolving the problem in the traditional art caused by the fixed locations of the optical interfaces of the upper and lower connections and the physical optical interfaces of the RRU. The solution comprises: initiating an RRU and turning off signal transmission of each optical interface of the RRU; determining an upper and lower connection flag bit, then determining a reference resource of a phase-locked clock of the RRU according to the upper and lower connection flag bit; turning on the signal transmission of each optical interface after the phase-locked loop is locked. The solution realizes self-adaptation of the upper and lower connections of the optical interfaces of the RRU, and is able to exactly judge the upper and lower connection flag bit of the optical interface, which ensures the stability of the flag bit.