Dynamic virtual channel dispatcher based on FPGA and dispatching method thereof

A virtual channel and channel scheduling technology, applied in wireless communication, electrical components, etc., to achieve the effect of small delay time and improved use efficiency

Inactive Publication Date: 2014-02-12
SHANGHAI SPACEFLIGHT INST OF TT&C & TELECOMM
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  • Abstract
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Problems solved by technology

Utilizing the present invention not only solves the problem of scheduling priority and rate switching, but also improves the channel scheduling efficiency of AOS to over 98%

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  • Dynamic virtual channel dispatcher based on FPGA and dispatching method thereof
  • Dynamic virtual channel dispatcher based on FPGA and dispatching method thereof

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Embodiment Construction

[0018] The dynamic virtual channel scheduling controller of the present invention adopts FPGA to reconfigure the scheduling priority strategy, and at the same time realizes on-orbit switching of priority and rate modes. It is composed of FPGA and peripheral interface circuit, crystal oscillator, program memory and remote control telemetry (command injection module and data output interface module). User data enters FPGA through virtual channel input interface to participate in scheduling, and FPGA schedules each virtual channel data internally. , multiplexing and frame formatting, etc., and then send the data to the transmitter through the output interface.

[0019] With the development of space exploration technology, the traditional measurement and control (TC / TM) link can no longer meet the application requirements of multi-load, rate and multi-task. Therefore, CCSDS proposed the AOS protocol to meet the needs of future space flight and exploration mission data systems. The...

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Abstract

The invention discloses a dynamic virtual channel dispatcher based on an FPGA and a dispatching method of the dynamic virtual channel dispatcher, belongs to the technical field of advanced orbiting systems (AOSs), and the dynamic virtual channel dispatcher and the dispatching method are applied to the data processing and transmitting field, which has high reliability requirements, of manned flight vehicles, satellites, guided missile and the like. A hardware system is composed of a virtual channel input interface, a dispatching controller, a data output interface module, a program storage device, an instruction injection module, a telemetering return interface module, a crystal oscillator and a power source control part. The effects that a dispatching strategy and output speed of a data link virtual channel are dynamically changed in the orbiting flight period of a spacecraft, and data output continuity when priorities are switched are ensured are achieved. Through a virtual channel dispatching technology, AOS virtual channel dispatching efficiency is improved to be over 98%, and orbiting switch of thirty two kinds of priorities and three speed modes is supported.

Description

technical field [0001] The invention belongs to the technical field of Advanced Orbiting System (AOS: Advanced Orbiting System), and specifically relates to a method for making a virtual channel scheduler based on FPGA with reconfigurable priority and transmission rate. Background technique [0002] AOS processes various application data on the spacecraft according to the CCSDS standard. Its scheduling part is designed based on the principle of time division multiplexing, and multiplexes the data of each virtual channel at a fixed priority and fixed rate. Once the design is completed, the priority during the flight in orbit and rate cannot be changed. However, with the emergence of new tasks such as rendezvous and docking and space networking, the data on the aircraft is also becoming more diversified, including earth observation, space experiments, large-capacity storage, images, voice, email, environmental monitoring inside the aircraft, System platform management and astr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W72/12
Inventor 魏文超张风源汪雪峰
Owner SHANGHAI SPACEFLIGHT INST OF TT&C & TELECOMM
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