A total of 24 MHz of bandwidth is allocated to a particular FDD cellular telephone system that uses two 30 kHz simplex channels to provide full duplex voice and control channels.
Assume each cell phone user generates 0.1 Erlangs of traffic. Assume Erlang B is used.
(a) Find the number of channels in each cell for a four-cell reuse system.
(b) If each cell is to offer capacity that is 90% of perfect scheduling, find the maximum number of users that can be supported per cell where omnidirectional antennas are used at each base station.
(c) What is the blocking probability of the system in (b) when the maximum number of users are available in the user pool?
(d) If each new cell now uses 120° sectoring instead of omnidirectional for each base station,what is the new total number of users that can be supported per cell for the same blocking probability as in (c)?
(e) If each cell covers five square kilometers, then how many subscribers could be supported in an urban market that is 50 km × 50 km for the case of omnidirectional base station antennas?
(f) If each cell covers five square kilometers, then how many subscribers could be supported in an urban market that is 50 km × 50 km for the case of 120° sectored antennas?