World Wide Networking for the High Energy Physics Community in the Countries of the Former Soviet U.

Paper: 412
Session: D (talk)
Speaker: Frese, Hans, DESY, Hamburg
Keywords: networking, network monitoring, network performance, communication, wide-area networking

World Wide Networking for the High Energy Physics
Community in the Countries of the Former Soviet Union

Sergei F. Berezhnev, NPI MSU
Hans Frese, DESY


During the period 1993-1996, the Radio-MSU/RUHEP network has
been established connecting the majority of High Energy
Physics centers in the countries of the former Soviet Union
with their counterparts in the West and the rest of the
Internet. The central node of this network is located at
DESY in Hamburg where ten satellite links and one
terrestrial link to the East (with a total capacity of
2Mbps) connect to DESY and, via the German Research Network
(DFN), to Germany and points West.

Traffic levels are 11GB/d.

As designated by the funding organizations (BMBF, INTAS, and
NATO), the High Energy Physics centers have been tasked to
act as distribution points for general scientific traffic
in their neighbourhoods. As a result, about 70% of the
general scientific international network traffic of the FSU
is carried by this network.

A Russian geostationary satellite (Raduga) is used in
conjunction with Russian earth stations (KEDR-M). The
satellite links are used in single channel per carrier mode
avoiding the problems of TDMA for Internet connectivity.
In order to overcome the 500 ms intrinsic delay of satellite
links, a terrestrial line carrying short packets is operated
in parallel to the Hamburg-Moscow satellite link. This
results in a RTT of 150 ms for interactive work.

Given the limits of the FSU telephone system, microwave
links, radio modems, and fiber lines have been used to
solve the "last mile problem" for speeds above 100 kbps.
For example, nine institutes within a distance of up to
100 km from Moscow have been connected via 2Mbps microwave
links. In Yerevan, a cellular radio modem system is
covering the whole city plus suburbs.

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