High-speed spatial network data protocol conversion and multiplexing device based on FPGA

Abstract

The invention provides a high-speed space network data protocol conversion and multiplexing device based on an FPGA. The device comprises a network layer processing part and a data link layer processing part. Wherein the network layer processing part comprises a cache control module used for caching intermediate data of an IP packet received by a space network; an IP packet subpackaging module which is used for classifying IP packets to obtain classification information and performing classification caching; an EPDU packet packaging module which is used for packaging the IP packets according to the classification information to obtain EPDU packets and storing the EPDU packets into corresponding caches respectively; the data link layer processing part comprises: an MPDU packet packaging module, which is used for packaging cached EPDU packets to obtain MPDU packets; an AOS transmission frame packaging module which is used for packaging the MPDU packets to obtain AOS transmission frames;and a channel multiplexing scheduling module which is used for performing channel multiplexing scheduling on the AOS transmission frame and outputting the AOS transmission frame to a physical channel.

Description

technical field [0001] The invention relates to the technical field of space network data processing, in particular to an FPGA-based high-speed space network data protocol conversion and multiplexing device. Background technique [0002] With the development of aerospace technology, space missions are becoming more and more complex, and the demand for spacecraft networking and interconnection is increasing. Most of the current space-based networks are self-contained and inconsistent with the mature TCP / IP network standards on the ground, which seriously restricts the flexibility, efficiency and interoperability of space-ground data interaction. The integration and unification of space-based networks and ground networks has become a The inevitable trend of future spatial data system development. [0003] In space-to-earth network communications, on the one hand, it is necessary to adapt to the characteristics of high delay, intermittent connection, and high bit error rate of...

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Problems solved by technology

[0004] Obviously, the traditional low-speed processing scheduling method based on LVDS, RS422 and other custom interface data can no longer meet the transmission requirements of high-speed space network data

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