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Packet Loss, Minimum RTT and Throughput

Image Added

Average RTT (as seen
from SLAC)

Minimum RTT (as seen
from SLAC)

Packet Loss (as seen
from SLAC)

Throughput (as seen
from SLAC)

Wiki Markup
Round Trip Times are measurements which are influenced by the distance between the sites. The minimum RTTs for Korea and Japan are within the acceptable range. Measurements for China and Taiwan are still within the acceptable range, however they appear to be moving towards the poor bracket i.e. of greater than 250 ms. \[<span style="color: #990033">This needs to be investigated</span>\] Results] As a consequence of [consistent government policies|http://csdl2.computer.org/comp/proceedings/hicss/1999/0001/07/00017023.PDF] since 1994 and support from [Asian Development Bank|http://www.adb.org/media/Articles/2004/4747_mongolia_connecting_with_information_age/] results for Mongolia have improved significantly however they still lie in the range of poor. This is perhaps because of the poor ratio of users to available capacity. With the implementation of the [ICT Vision 2010|http://www.ony.unu.edu/seminars/2007/iist/04%20-%20Mongolia.ppt] plan particularly the setup of an [Internet Exchange Router|http://www.apng.org/museum/ppt/6apng-mongolia.ppt] in 2005, we observe step improvements (for all parameters) in 2005 and 2006 in minimum RTTs, packet losses and throughputs.

The graph on the right - packet loss - summarizes the packet losses as seen from SLAC. These observations are independent of the RTTs. Here Taiwan, S. Korea and Japan show good results with losses of less than 1.0%. Mongolia and China both have improved significantly over the years and since 2005 have been within the acceptable range of less than 2.5%.

Image Removed

Throughput (as seen
from SLAC)

Wiki Markup\[<span style="color: #990033">This needs to be investigated</span>\]The throughput observed by the monitoring node in SLAC is as expected. Japan and Korea appear to be steadily improving (considering the increase in international bandwidth as discussed earlier), though with different rates. Taiwan on the other hand has overtook Japan, which is understandable when we consider the ratio of the available bandwidth per thousand users.

Routing

For the sake of reference, the figure below shows major international traffic routes with at least 9 Gbps of aggregate capacity and the submarine cable map. Domestic routes are omitted. The source is TeleGeography research.

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