| 摘要 |
<p>In a multiple-mode communications terminal, such as a dual-mode analog/digital cellular radiotelephone, cumulative usage of communications units in multiple modes is measured for comparison to stored critical values of tariffs for each of the modes, and measures to control usage are initiated based on an economic efficiency of the multiple modes. More specifically, expenses incurred by a communications terminal that communicates with a first mobile radiotelephone system and a second mobile radiotelephone system are controlled by storing first and second critical values which characterize a tariff structure of the respective first and second mobile radiotelephone communication systems. Communications units used by the communications terminal are measured. An economic efficiency associated with the use of the terminal to communicate with the first and second mobile radiotelephone communications systems is determined from the measured communications units and the first and second stored critical values. Measures are initiated to control communications usage with the first and second radiotelephone communications systems by the terminal based on the determined economic efficiency.</p> |
