CPRI Transport Equipment Bit Rate Locking for RoE Synchronization
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Solution Overview
Problem
The existing CPRI auto-negotiation process is disrupted when RoE equipment is installed between the radio equipment (RE) and the radio equipment controller (REC), leading to a lack of dynamic bit rate negotiation and potential failure in achieving L1 synchronization.
Innovation Solution
A method involving a first and second transport equipment that detects the bit rate of the RE and REC, locks the working bit rate of their respective CPRI ports to the detected bit rate, and sends a message to each other to maintain synchronization, thereby supporting CPRI auto-negotiation even with RoE equipment deployed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If RoE equipment is installed between RE and REC, then transport flexibility is improved, but CPRI auto-negotiation is disrupted and L1 synchronization cannot be achieved
Solution Approach 1:
The patent introduces intermediary components within the RoE equipment (bit rate detection module, working bit rate locking module, and message generation/sending modules) that mediate between the RE and REC to restore the CPRI auto-negotiation process. These intermediaries detect bit rates, lock working bit rates, and exchange negotiation messages, enabling RoE equipment to function as an active participant in the negotiation rather than a passive disruptor.
2Device complexity
If statically configured bit rates are used, then system simplicity is maintained, but adaptability to different bit rate requirements is lost
Solution Approach 1:
The patent transforms the static bit rate configuration into a dynamic system where the working bit rate can be automatically negotiated and adjusted. The RoE equipment continuously detects bit rates, locks appropriate working bit rates, and exchanges negotiation messages, enabling the system to adapt to different bit rate requirements (614.4 Mbps to 24330.24 Mbps) while maintaining operational simplicity through automated processes.
3Adaptability or versatility
If CPRI auto-negotiation is supported with RoE equipment, then bit rate adaptability is improved, but system complexity increases
Solution Approach 1:
The patent implements multi-functional modules within the RoE equipment that handle multiple aspects of the CPRI auto-negotiation process. The bit rate detection module, working bit rate locking module, and message generation/sending modules work together to provide universal functionality that supports various CPRI bit rate options and maintains compatibility with existing RE and REC equipment, reducing the need for separate specialized components.
Data Source
AI summary
Methods and apparatuses for communication between a radio equipment and a radio equipment controller are disclosed. According to an embodiment, a first transport equipment detects a bit rate of one of a radio equipment and a radio equipment controller. The one of the radio equipment and the radio equipment controller is connected with the first transport equipment through a first common public radio interface (CPRI) link. The first transport equipment locks a working bit rate of a first CPRI port of the first transport equipment to the detected bit rate. The first transport equipment generates a message indicating the detected bit rate and sends the message to a second transport equipment that is connected with the other of the radio equipment and the radio equipment controller through a second CPRI link.