Aziz Gul Meghani

US Patent:

52512495, Oct 5, 1993

Filed:

Nov 26, 1990

Appl. No.:

7/617547

Inventors:

Daniel L. Allen - McKinney TX
Lance M. La Bauve - Plano TX
Aziz A. Meghani - Carrollton TX

Assignee:

Northern Telecom Limited - Montreal

International Classification:

H04M 1100

US Classification:

379 59

Abstract:

A method of enhancing an existing cellular network is described such that a new system can operate in tandem with an existing cellular network without disrupting service to existing subscribers and without requiring the replacement of existing equipment. In particular, this is achieved by giving control of all dedicated control channels (CCHs) in each cell to a second switch. The second switch thereby is provided with the control of call set-ups, thus providing for more than one category of mobile subscriber. Some subscribers can be serviced by the existing switch and others by the second switch.