A cellular telephone system has call management decisions made based on the
exact geographic location of the mobile unit. These call management
decisions include billing and taxing decisions, cell site selection,
frequency selection and even cellular system selection. The decisions are
continuously updated during a call whereby decisions can be made and
changed regardless of where a call originated. Cell site location, and
even cellular system selection, can be made in a specific manner to best
serve the needs of the mobile user, the cellular system as well as the
public. It is even possible for a cellular system to locate one or more of
its cell sites in the geographic area served by another cellular system.
In some cases, cellular systems might even share cell sites.