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Quantitative Finance · Glossaire

Qu'est-ce que « Route factor » ?

Definition 10.4 Networks, Hardware and Trading Infrastructure · Chapitre 10 — The North American Map

The route factor of a route is its published or measured one-way latency divided by the latency floor, in the route’s own medium, between its end points. A route factor of 1 is a route along the geodesic with no equipment; everything else is above 1.

RouteFromToPublishedFloorRouteExcess
(ms)(ms)factor(µs\text{µ}\mathrm{s})
Microwave, 2016AuroraCarteret3.9823.9401.01142
Microwave, 2016AuroraMahwah3.9863.9341.01352
Wireless, rack to rackMarkhamMahwah1.8901.7481.082142
Wireless, rack to rackMarkhamNY41.9901.8361.084154
Wireless, rack to rackMarkhamCarteret2.0501.8451.111205
Fibre, 2010350 CermakCarteret6.6505.5071.2081 143
Fibre, later350 CermakCarteret6.5505.5071.1891 043
Table 10.2. Published one-way latencies against the floor in each route’s medium (air for microwave and wireless, fibre for fibre). Sources: Quincy Data’s 2016 release for the microwave routes, ICE’s Toronto wireless page for the Markham routes, Laughlin, Aguirre and Grundfest (2014) for the fibre. Data: nw_map.route_rows().
Published one-way route latencies against the geodesic distance between their end points, with the floors in vacuum (the floor in air is indistinguishable at this scale) and in fibre. The wireless routes sit just above the vacuum line; the 2010 fibre sits above even the fibre floor. Data: fig_map.py, routes of .
Figure 10.3. Published one-way route latencies against the geodesic distance between their end points, with the floors in vacuum (the floor in air is indistinguishable at this scale) and in fibre. The wireless routes sit just above the vacuum line; the 2010 fibre sits above even the fibre floor. Data: fig_map.py, routes of Table 10.2.
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