RF Front-End Control Bus Topology for High-Rate Signal Transmission
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Solution Overview
Problem
The existing communication rate between a radio frequency transceiver and multiple radio frequency front-end modules is limited, and the quality of control signals deteriorates as the number of front-end modules increases, particularly in 5G mobile communication systems.
Innovation Solution
Implementing a daisy chain topology structure for clock signals and a ring topology structure for data signals between the radio frequency transceiver and front-end modules, allowing unidirectional transmission of control signals, thereby enhancing transmission efficiency and maintaining high rates even with an increased number of front-end modules.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If MIPI or SPI interface is used for control signal transmission between radio frequency transceiver and multiple front-end modules, then the interface implementation is standardized, but the communication rate is limited and control signal quality deteriorates as the number of front-end modules increases
Solution Approach 1:
The control bus is segmented into separate clock signal transmission path and data signal transmission path. The clock port is coupled to the front-end module through a clock line, and the data port is coupled through a data line. This segmentation allows independent optimization of clock and data transmission, enabling higher communication rates while maintaining standardized interface implementation.
2Adaptability or versatility
If the number of radio frequency front-end modules increases, then the system functionality and coverage are enhanced, but the control signal quality deteriorates and communication rate is limited
Solution Approach 1:
A dedicated control bus acts as an intermediary between the radio frequency transceiver and multiple front-end modules. The control bus includes separate clock and data lines that provide dedicated transmission paths, isolating the transceiver from direct interference with multiple modules while maintaining reliable control signal transmission to each module.
3Device complexity
If direct connection is used between radio frequency transceiver and multiple front-end modules, then the connection is simple, but the transmission efficiency decreases and readback rate is reduced
Solution Approach 1:
The connection architecture transitions from a single shared data line to a two-dimensional structure with separate clock line and data line dimensions. This dimensional separation allows simultaneous transmission of clock and data signals without interference, improving transmission efficiency and enabling full-rate readback operations while maintaining connection simplicity.
Data Source
AI summary
Embodiments of this application provide a radio frequency apparatus and a control signal transmission method. A specific solution is as follows: A radio frequency transceiver includes a primary control interface, and the primary control interface includes a first clock port and a first data port. Each radio frequency front-end module in at least one radio frequency front-end module includes a secondary control interface, and the secondary control interface includes a second clock port and a second data port. The first clock port is coupled to the second clock port of the at least one radio frequency front-end module through a control bus based on a daisy chain of a linear topology structure, and the first data port is coupled to the second data port of the at least one radio frequency front-end module through the control bus based on a daisy chain of a ring topology structure.