Base Frame Structure for Stable PHY Signal Transmission
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Solution Overview
Problem
Existing IR and CPRI protocols for transmitting frame data between near-end and remote devices in mobile communication systems face issues such as non-compliance with timing sequences, unstable IQ data transmission, and increased packet loss due to the addition of K-code flags and incomplete transmission of IQ data.
Innovation Solution
A method and apparatus for transmitting frame data using a user-defined base frame structure with super groups and base groups, each containing MAC frame structure data and interframe gaps, matched to the output timing sequence of a physical layer (PHY) converting chip, ensuring stable optical fiber signal transmission and synchronization through control words and CRC checks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If IR or CPRI protocol is used to transmit frame data, then communication interface stability is improved, but data timing sequence compliance deteriorates due to K-code flag addition
Solution Approach 1:
The transmission data is segmented into super groups containing multiple base groups, with each base group containing MAC frame structure data and interframe gap. This segmentation allows the MAC frame structure data to maintain its original timing sequence while the interframe gap accommodates protocol overhead, resolving the timing sequence compliance issue without sacrificing communication stability
Solution Approach 2:
A user-defined frame format is introduced as an intermediary structure between the MAC layer and physical layer. This frame format includes super groups and base groups that act as buffers, allowing the MAC frame structure data to be transmitted without adding K-code flags that would disrupt timing sequence, while still utilizing the stable IR/CPRI communication interface
2Reliability
If IR or CPRI protocol is used for transmission, then communication protocol maturity is improved, but IQ data transmission stability deteriorates
Solution Approach 1:
The patent ensures continuous transmission of IQ data by organizing it into base groups within super groups, where each base group contains MAC frame structure data and interframe gap. This continuous structured transmission prevents packet loss and maintains IQ data stability while utilizing the mature IR/CPRI protocol infrastructure
3Adaptability or versatility
If K-code flag is added to data, then protocol compatibility is improved, but transmission feasibility through network cables deteriorates
Solution Approach 1:
The patent extracts the problematic K-code flag addition from the transmission process by using a user-defined frame format that directly encapsulates MAC frame structure data. This extraction eliminates the timing sequence disruption caused by K-code flags while maintaining protocol compatibility through the structured super group and base group organization, enabling feasible transmission through network cables
4Productivity
If incomplete IQ data transmission is used, then data transmission speed is improved, but application layer processing difficulty increases
Solution Approach 1:
The patent performs preliminary organization of IQ data into complete base groups within super groups before transmission. Each base group is fully structured with MAC frame structure data and interframe gap, ensuring complete IQ data transmission. This preliminary structuring simplifies application layer processing while maintaining high transmission speed through efficient use of the communication interface
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
This approach ensures continuous and stable transmission of IQ data, aligns with PHY converting chip timing sequences, and maintains application layer requirements, improving data integrity and reducing packet loss.
Implementation Method 1
converting the base frame into an optical fiber signal by way of the physical layer (PHY) converting chip
Data Source
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AI summary
A method and an apparatus for transmitting frame data between a near-end device and a remote device are provided. The method comprises: generating, by the near-end device, a base frame in a user-defined frame format, a physical layer (PHY) converting chip being built in the near-end device, the base frame comprising a first number of super groups, the super group comprising a second number of base groups, and the base group comprising media access control (MAC) frame structure data and an interframe gap; matching duration of the MAC frame structure data and the interframe gap with an output timing sequence of the physical layer (PHY) converting chip; and converting the base frame into an optical fiber signal by way of the physical layer (PHY) converting chip, and sending the optical fiber signal to the remote device. In embodiments of the present application, the duration of the MAC frame structure data and the interframe gap matches the output timing sequence of a bottom-layer PHY converting chip, such that the bottom-layer PHY converting chip can normally receive and send data.