Selective system scan for multizone radiotelephone subscriber un

Telecommunications – Transmitter and receiver at separate stations

Patent

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455 33, 455166, H04Q 700

Patent

active

049053019

ABSTRACT:
A radiotelephone subscriber unit which overcomes the problem of attempting to access an undesired radiotelephone system is disclosed. A comparison between the system identification transmitted on a control channel of a desired radiotelephone system and the system identification transmitted on an access channel is made during the access process of the subscriber unit. Access is permitted if the control channel system identification and the access channel system identification match.

REFERENCES:
patent: 4618998 (1986-10-01), Kanamura
patent: 4669107 (1987-05-01), Eriksson-Lennartsson
Electronic Industries Association: "EIA Interim Standard/Cellular System/Mobile Station-Land Station Compatibility Specification", IS-3-D, Mar. 1987.
Ericsson Radio Systems: "Suggested Improved Logic to the IS-3-D Specification", May 20, 1988.
Ericsson: "Proposed Changes/Amendments to the TACS-Specification" Document No. BT/Su 71318, 9/23/87.
M. Karim: "A Controller for the Mobile Logic Unit in the BTL High Capacity Mobile Telecommunications System", 26th Annual Conference of the IEEE Vehicular Technology Group, Mar. 1976, pp. 72-74.
Motorola, Inc.: "Mini-T*A*C 6800XL/Cellular Mobile Telephone", User's Manual 68P81117E80-0, 8/14/87, pp. 38-45.

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