Annual Traffic demand describes the total volume of traffic carried during a year. It is principally used to calculate Usage Revenue but can also affect the Resources Required
– see 10.3.31 Tariffs and revenues and 10.3.27 Resource requirements.
Traffic per Connection
Represents the volume of traffic originating from one connection, and can be specified directly as a time series or as a reference to the Output of a transformation. It may also be influenced by tariffs
– see 10.3.32 Tariff feedback to demand. This input is ignored if the Traffic Calculation input is set to Peak Driven.
Note: These rules apply if the model is running in years. If the model run is in quarters or months the logic is applied to the corresponding shorter periods.
Note: if a model runs in months or quarters, then the Traffic result for a year is aggregated over the periods within each year. The Annual Traffic result is the equivalent traffic that would flow in a whole year if the same Traffic recurred each month or quarter; e.g., four times the Traffic result for a quarter or twelve times for a month.
The total Annual Traffic in a year n, an, is calculated as the product of the Average Connections for the year and the Traffic per Connection:
where
cn = number of Connections at the end of period n
un
= Traffic per Connection in period n,
unless the global input Use Average Connections = No, in which case Annual Traffic is simply calculated from period-end Connections, cn.
Note: using average connections for a period (default) generally gives the more realistic view about the traffic to carry in the network and the revenues to consider.