However, according to parameter r2 of our model, customers of ISP2 choose a% for premium QoS class service and (1-a)% for BE class service.
Formulations for the two ISP cost functions, ISP1 Cost and ISP2 Cost, are developed below.
At the same time, each ISP also knows its competitor's pricing strategy and can construct the best choice among all known combinations of pricing strategies of ISP1 and ISP2.
Thus, if Net1 > Net2, the customer will choose ISP1, otherwise he will choose ISP2.
ISP2 will also choose a price, F2 and r2, for its optimal profit under the assumption that ISP1's price is fixed.