ZTE Communications ›› 2020, Vol. 18 ›› Issue (4): 34-44.doi: 10.12142/ZTECOM.202004006

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Adaptability Analysis of IP Routing Protocol in Broadband LEO Constellation Systems

SUN Chenhua(), YIN Bo, LI Xudong, TIAN Xing, PANG Ce   

  1. The 54th Research Institute of China Electronics Technology Group Corporation, Shijiazhuang 050081, China
  • Received:2020-10-11 Online:2020-12-25 Published:2021-01-13
  • About author:SUN Chenhua (sun_chenhua@sina.com) is a researcher with the 54th Research Institute of China Electronics Technology Group Corporation (CETC). She is mainly engaged in satellite communication system, satellite constellation networking, and satellite-ground integrated network protocols.|YIN Bo is a senior engineer with the 54th Research Institute of CETC and mainly engaged in routing technology of satellite IP network.|LI Xudong is an assistant engineer with the 54th Research Institute of CETC and mainly engaged in orbital design of satellite constellations.|TIAN Xing is an assistant engineer with the 54th Research Institute of CETC and mainly engaged in OPNET simulation of satellite system.|PANG Ce is an assistant engineer with the 54th Research Institute of CETC and mainly engaged in satellite communication protocols.

Abstract:

With the inclusion of satellite Internet as the information infrastructure in China’s “new infrastructure” category, relevant domestic industries and scientific research institutes have successively carried out the design of broadband low earth orbit (LEO) constellation systems and key technical research. As the core technology for the satellite-to-ground network communications of a broadband LEO constellation system, routing technology is extremely important for the efficient and reliable transmission of various service data. Focusing on the two important broadband LEO constellation systems in China, in-depth analysis and simulation of the high dynamics of the satellite-to-ground satellites are conducted in this paper to obtain more accurate network topology changes and characteristics; then the adaptability of the ground standard IP routing protocol to the broadband LEO constellation system is analyzed, and an LEO constellation simulation scenario is built with the Opnet software. The simulation results of the convergence performance of the standard IP routing protocol are produced. The results show that the IP protocol does not perform well for LEO satellite constellation networks. Based on the studies, some solutions are proposed to take full advantages of the characteristics of LEO satellite systems. These can also provide a reference for the choice of inter-satellite routing architecture and protocol technology for broadband LEO constellation in the future development.

Key words: satellite Internet, IP routing protocol, high dynamic networking