Edward Joel Amos Jr., Inventor of the Cellphone
Edward Joel Amos Jr. could be the inventor of the century. He invented the cellphone (Mobile communication system, US 3663762 A) in 1970.
The invention provided for a high capacity cellular mobile communication system arranged to establish and maintain continuity of communication paths to mobile stations passing from the coverage of one radio transmitter into the coverage of another radio transmitter. A control center determines mobile station locations and enables a switching center to control dual access trunk circuitry to transfer an existing mobile station communication path from a formerly occupied cell to a new cell location. The switching center subsequently enables the dual access trunk to release the call connection to the formerly occupied cell.
Summary of the Invention
In the exemplary embodiment an electronic data processor is incorporated into a mobile communications system comprising a plurality of base stations each located in individual cell areas. The system is arranged to locate mobile stations in any cell area and to establish communication paths between located mobile stations and between located mobile stations and fixed stations. Apparatus is provided to establish and maintain a record of communication links serving located mobile stations. Additional apparatus is provided to periodically interrogate predetermined cell areas to detect the movement of located mobile stations into new cell areas. Apparatus is also provided to establish and record identity of communication links to the new cell areas and to reassign existing communication paths to new communication links while maintaining continuity of communication service.
In accordance with one feature of my invention directional antenna apparatus is provided in each cell area to locate mobile stations within particular cell areas.
Another feature of my invention is the provision of a stored program electronic data processor to assimilate location information, assign communication links, and process service requests for mobile stations located in a plurality of cell areas.
Another feature of my invention is the provision of switching apparatus wherein communication paths may be established between located mobile stations and between located mobile stations and fixed stations connected to the telephone direct distance dialing network.
In accordance with still another feature of my invention dual access switching apparatus is provided wherein communication paths established over communication links to certain cell areas may be switched onto communication links to other cell areas while maintaining continuity of communications between roaming mobile stations.