Patent ID: 6324391
Filing Date: 2001-11-27
Classification: H04B,H04W

Abstract:
A cellular communication system comprising:radio frequency receiving apparatus at a cell site, said apparatus comprising:a radio frequency energy receiver for receiving radio frequency (RF) energy at frequencies within a predetermined range of radio frequencies and modulated by data signals, wherein the RF energy has a predetermined spectral occupancy;downconverting means coupled to said radio frequency receiver for converting the data signal modulated RF energy received by said radio frequency receiver to energy modulated by said data signals having a frequency lower than said predetermined range of frequencies of energy received by said radio frequency receiver, wherein the lower frequency energy has a spectral occupancy which is the same as the predetermined spectral occupancy; andan optical signal transmitter coupled to said downconverting means, wherein said optical signal transmitter transmits optical signals modulated by said energy modulated by said data signals having a frequency lower than said predetermined range of frequencies of energy received by said radio frequency receiver;a telephone switching office comprising:an optical signal receiver for converting the optical signals into electrical signals; andswitching and control means coupled to said optical signal receiver for providing output signals corresponding to said electrical signals; andat least one optical fiber interconnecting said optical signal transmitter with said optical signal receiver.