Method and apparatus for interference free communications between a remote handset and a host subscriber unit in a Cellular Radio Telephone System
First Claim
Patent Images
1. In a mobile cellular radio telephone subscriber unit capable of voice communications with an assigned cellular base station over an assigned rf frequency channel, the improvement comprising:
- offset rf communications channel transceiver means for voice communications over an offset rf frequency channel which differs by a predetermined frequency from said assigned rf frequency channel; and
control data link means for transmitting by rf, data representing said offset frequency channel.
2 Assignments
0 Petitions
Accused Products
Abstract
A method and apparatus for providing interference free rf communications between remote handsets and host subscriber units in a Cellular Radio Telephone System includes the use of data transmission and voice channels assigned by microprocessors to track the currently assigned base station/subscriber unit channel assignment--but offset therefrom by one channel thereby to reliably and automatically arrive at an interference free channel.
-
Citations
20 Claims
-
1. In a mobile cellular radio telephone subscriber unit capable of voice communications with an assigned cellular base station over an assigned rf frequency channel, the improvement comprising:
-
offset rf communications channel transceiver means for voice communications over an offset rf frequency channel which differs by a predetermined frequency from said assigned rf frequency channel; and control data link means for transmitting by rf, data representing said offset frequency channel. - View Dependent Claims (2, 3, 4, 5, 6)
-
-
7. An improved method for voice communications using a mobile cellular radio telephone subscriber unit with an assigned cellular base station over an assigned rf frequency channel, the improved method comprising the steps of:
-
transmitting and receiving voice communications over an offset rf frequency channel which differs by a predetermined frequency from said assigned rf frequency channel; and transmitting by rf data representing said offset frequency channel. - View Dependent Claims (8, 9, 10)
-
-
11. A method for obtaining interference free rf communications between a remote handset having a preassigned address and a subscriber unit having a preassigned address in a cellular radio telephone system having voice channel frequencies assigned by a centralized controller, said method comprising the steps of:
-
entering a telephone or other subscriber identifying number to be called on a key pad of said handset; depressing a send button on said handset and thereby loading the address of said subscriber unit and said called number into said subscriber unit over an rf data link; passing a proper serial number, ID number and call number from said subscriber unit to its assigned cell base station upon said subscriber unit'"'"'s recognization of its address received from said handset; receiving assignment of a voice channel from said assigned cell base station; offsetting the frequency of said voice channel assignment by a predetermined frequency amount; and transmitting, from said subscriber unit to said handset over said data link, the handset address and said offset voice channel assignment in order to establish interference-free voice communications between said handset and said subscriber unit. - View Dependent Claims (12, 13, 14, 15, 19)
-
-
16. A method for obtaining interference free communications between a subscriber unit having an address and a remote handset having an address, used in a cellular radio telephone system having a central controller, said method comprising the steps of:
-
transmitting a call from said cellular radio telephone system controller to said subscriber unit, said call including voice frequency assignment data; offsetting the frequency of said voice frequency assignment data by a predetermined frequency; and passing said offset voice frequency assignment data from said subscriber unit to said handset over an rf data link to establish voice communication to said handset on said offset voice frequency assignment. - View Dependent Claims (17, 18, 20)
-
Specification