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