A high-speed network preprocessing device based on the sky-earth gateway

Abstract

The invention discloses a high-speed network preprocessing device based on a heaven-earth gateway, which adopts an FPGA-based parallel processing architecture to realize network data routing between the spacecraft internal network and the gateway protocol conversion module, including: main control processing FPGA and co-processing DSP, wherein, the main control processing FPGA carries out high-speed interface protocol processing, network routing and forwarding and high-speed cache to the uplink data and downlink data; the co-processing DSP has a standard TCP / IP protocol stack, and communicates with the main control through the GMII interface Process the FPGA for network communication, complete link establishment, network management, and flow control with the internal network of the spacecraft; the main control processing FPGA pre-identifies the network IP packet: directly processes and outputs the downlink transmission service packet at high speed, and Network link ARP packets, ICMP packets, network management packets and flow control packets are forwarded to the co-processing DSP for protocol processing. The invention greatly improves the processing speed, versatility and expandability of the gateway equipment, and reduces the difficulty of maintenance and upgrading.

Description

technical field [0001] The present application relates to the technical field of network data processing, and in particular, to a high-speed network preprocessing device based on a sky-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. However, for the communication process between the spacecraft and the ground, due to the large delay and delay of the space-ground link. Due to the characteristics of high bit error rate and intermittent link interruption, the TCP / IP protocol cannot be used directly, and the protocol conversion needs to be performed through the Tiandi gateway device. 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, the TCP / IP protocol is converted into other communic...

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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