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Jon Crowcroft |
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University of Cambridge in London… |
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During the11th September 2001, the Internet
provided a valuble resource for ordinaryy and extraordinary users: |
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events
showed that it was more robust than the PSTN or cellular telephone nets |
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http://www.internettrafficreport.com/ |
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This raises the question – should we add
facilities for |
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Priority versus Preemption? |
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Alternate path routing? |
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Security? Or wiretap |
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Disasters are associated with unusual access
requirements |
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Spatial – concentrated and at odd locations |
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Temporal – massive flash crowd effects.. |
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As well as the normal users presenting an
overload |
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Despite arguments that the core nets are
overprovisioned, its clear in this case that access nets and damaged cores
are not. |
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Not sure that there is a special case |
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Rather, a re-statement of the general case for
qos |
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Anecdotal evidence about the override facilities
in the PSTN show that it is not necessary or always wise! |
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For example, rescue workers using cell phones
after a bomb in northern ireland caused a survivor’s call from under the
rubble to be blocked for 30 minutes |
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Notes
