Patent ID: 6334055
Filing Date: 2001-12-25
Classification: H04W

Abstract:
A standards converter for allowing a mobile telephone which transmits, at any one time, on one transmit frequency of a first set of transmit frequencies and which receives, at any one time, on one receive frequency of a first set of receive frequencies, to communicate with a base unit which transmits, at any one time, on one transmit frequency of a second set of transmit frequencies and which receives, at any one time, on one receive frequency of a second set of receive frequencies, said converter comprising:a first interface which receives from said mobile telephone a signal at said one transmit frequency of said first set of transmit frequencies and which transmits to said mobile telephone a signal at said one receive frequency of said first set of receive frequencies;a second interface which receives from said base unit a signal at said one transmit frequency of said second set of transmit frequencies and which transmits to said base unit a signal at said one receive frequency of said second set of receive frequencies;a first propagation path which propagates said signal at said one transmit frequency of said first set of transmit frequencies from said first interface to said second interface;a second propagation path which propagates said signal at said one transmit frequency of said second set of transmit frequencies from said second interface to said first interface;a first frequency converter along said first propagation path which converts said one transmit frequency of said first set of transmit frequencies to a corresponding frequency of said second set of receive frequencies; anda second frequency converter along said second propagation path which converts said one transmit frequency of said second set of transmit frequencies to a corresponding frequency of said first set of receive frequencies.