microcells - Maxwell

• A.K.Erlang, a Swedish engineer, studied the
problem using statistical analysis early in
twentieth century.
• He found, not surprisingly, that the more channels
there were, the smaller the possibility of blocking
for a given amount of traffic.
• He found that with more channels, the amount of
possible traffic per channel increases for a given
blocking probability.
• This phenomenon is called trucking gain, and it is
the reason a two-provider system is theoretically
less efficient than one using a single provider.