Consideration of Space Communications Needs For Future Mars Human Community
- Paper number
IAC-08.B2.3.13
- Author
Dr. Takashi Iida, National Institute of Information and Communications Technology (NICT), Japan
- Coauthor
Dr. Yoshinori Arimoto, National Institute of Information and Communications Technology, Japan
- Coauthor
Mr. Yoshiaki Suzuki, NEC Corporation, Japan
- Year
2008
- Abstract
The purpose of this paper is to discuss the communication needs and the Earth-Mars communications system in the era of future Mars human community in conjunction with the recent Internet movement to the Web 2.0.
First, it describes the necessity of creating the mirror database of Earth on the Mars, if the human community is created on the Mars probably around 2050. This is why we will be unable to endure the latency to connect to the Earth, because the both way propagation delay between Earth and Mars is about 9 minutes to three quarters hour. Even in such a situation, the Internet search action would be still fundamental in the Web 2.0 and beyond era. Therefore, at least a mirror database of the Internet search engine on the Earth need to be located on the Mars. The paper reviews, after the Web 2.0 is briefly introduced, the discussion on the rough communication needs of a few hundreds to a few thousands times capacity as much as the present planned communication capacity for the construction and operation of the Internet database on the Mars with showing that the size, weight, consumption power of the computers need to be decreased to one-thousandth (1/1,000) times as much as the present one(1).
Second, this paper gives more extended discussion on the needs of information capacity around 2050 to be transmitted from Earth to Mars to construct a mirror database not only for search engine but also for all of the Internet data on the Earth, because it will be difficult to use if to get Internet information on the Mars has a great latency. Newly created information is stored in four physical media: print, film, magnetic and optical. These storage media produced about 5 EB (ExaByte) of new information in 2002(2). The new stored information grew about 30% a year between 1999 and 2002. In order to estimate information around 2050, since 30% a year growth for 50 years means five hundred thousand times as much. Since it seems to be extremely big and it is not certain that such large growth will continue until 2050, growth of 30
Third, the structure of the Earth-Mars communication link is discussed. Considering the present study of Earth-Mars communication system(3), this paper estimates to be able to construct the link whose capacity is 10 Gbps by using near future technologies. Although this transmission speed of 10 Gbps satisfies the minimum transmission capacity described above, much more capacity will be required in the future. So this paper will further discuss the development items for the future studies to obtain larger capacity.
Fourth, the paper discusses the IP protocol for Earth-Mars communication link. Considering the Reference (4), this paper reviews that the CCSDS protocol is still usable for the future high capacity communications. It also clarifies the development items for the future studies.
References (1) Takashi Iida and Yoshiaki Suzuki: "Future Needs for Communication System in the Mars Human Community", 25th AIAA ICSSC2007, No.AIAA-2007-3304, Apr.12, 2007. (2) How much information? 2003, http://www2.sims.berkeley.edu/research/projects/how-much-info-2003/execsum.htm (3) Don M. Boroson, Chien-Chung Chen, Bernard Edwards: “Overview of the Mars Laser Communications Demonstration Project,” IEEE LEOS Newsletter 19, No. 5, (2005) 8-11. (4) Adrian J. Hooke: "Overview of the InterPlanetary Internet", BroadSky Workshop, 10th Ka and Broadband Communications Conference, Vicenza, Italy, Oct.1, 2004.
- Abstract document
- Manuscript document
IAC-08.B2.3.13.pdf (🔒 authorized access only).
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