High-speed network preprocessing device based on space-ground gateway

Abstract

The invention discloses a high-speed network preprocessing device based on a space-ground gateway. A parallel processing architecture based on an FPGA is adopted to realize network data routing between a spacecraft internal network and a gateway protocol conversion module. The device comprises a main control processing FPGA and a co-processing DSP, and the main control processing FPGA is used forcarrying out high-speed interface protocol processing, network routing forwarding and high-speed caching on uplink data and downlink data; the co-processing DSP is provided with a standard TCP / IP protocol stack and is in network communication with the main control processing FPGA through a GMII interface to complete link establishment, network management and flow control with an internal network of a spacecraft; and the main control processing FPGA performs pre-identification on a network IP packet by directly processing and outputting a downlink transmission service packet at a high speed, and forwarding a network link ARP packet, an ICMP packet, a network management packet and a flow control packet to the co-processing DSP for protocol processing. According to the invention, the processing speed, universality and expandability of the gateway equipment are greatly improved, and the maintenance and upgrading difficulty is reduced.

Description

technical field [0001] The present application relates to the technical field of network data processing, in particular to a high-speed network preprocessing device based on a heaven-earth gateway. Background technique [0002] In the system architecture based on space-ground integrated network communication, the mature TCP / IP protocol is used to realize network interconnection inside the spacecraft and the ground system. For the communication process between the spacecraft and the ground, due to the large delay and Due to the characteristics of high bit error rate and intermittent link interruption, the TCP / IP protocol cannot be directly adopted, and the protocol conversion needs to be performed through the Tiandi gateway equipment. On the one hand, the Tiandi gateway preprocesses the network data to realize the TCP / IP protocol communication with the network terminal , on the other hand, convert the TCP / IP protocol into other communication protocols suitable for space-to-gr...

AI Technical Summary

Problems solved by technology

[0003] In traditional space-ground gateway equipment, the network preprocessing function and protocol conversion function are usually not distinguished. The coupling degree between the two is high and the transfer relationship is complicated. For different space-ground link transmission protocols, different processing methods and processing structures are often required.

Once the sky-earth communication protocol needs to be replaced or upgraded, not only the TCP / IP protocol conversion part needs to be changed, but also the network preprocessing part needs to be changed adaptively, which undoubtedly reduces the versatility and scalability of the gateway device and increases maintenance the complexity

[0004] As the transmission center of the space-to-ground backbone network, the network processing performance of the gateway equipment will directly determine the speed and real-time performance of the space-to-ground communication. Due to the complexity of the network TCP / IP protocol, the current spaceborne network processing terminals mostly use software based on core processors and operating systems. Processing architecture, with the increasing complexity of spacecraft electronic systems and the increasing communication bandwidth of the space-ground link, higher and higher requirements are put forward for the real-time processing capability of high-speed network data of the gateway, which is limited by the performance of the processor and software. The traditional processing architecture is far from being able to meet the transmission requirements of the future space-ground integrated information system

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