If a wireless service provider has 20 cells to cover the whole service area, with each cell having 40 channels, how many users can the provider support if a blocking probability p of 2 % is required? Assume that each user makes an average of three calls per hour and the duration of each call is an average of three minutes. (Erlang B values are given in the Appendix A)
What will be an ideal response?
You might also like to view...
When a guardrail cannot be attached to a building, a solution may be to install a(n) _____.
a. personal fall arrest system b. anchorage device c. controlled access zone d. retractable lanyard
?How far into the block are cup-type core plugs installed?
What will be an ideal response?
In one field trial comparing no-till and conventional tillage, soil samples taken after 15 years without liming revealed that the pH of the upper 15 cm was lower on the no-till plot than on the conventional plot. Which of the following most likely accounts for this difference?
A) Plowing mixes the surface soil more thoroughly. B) Al3+ ions are tied up by the organic matter thereby releasing H+ ions. C) Acidifying effects of nitrogen-containing fertilizers. D) Earthworms were more active in the no-till plot. E) Organic decomposition produced more organic acids in the no-till plot.
A system that controls loads by opening and closing electrically operated mechanical switches is described as:
A) A relay logic. B) Solid state logic. C) Pneumatic logic. D) Modulating logic.