Paging performance during intelligent roaming

Details Paging performance during intelligent roaming Paging performance during intelligent roaming

1997-12-18

2000-06-13

To, Doris H.

Telecommunications

Radiotelephone system

Zoned or cellular telephone system

455515, 455 62, 4551611, H04B 1500

Patent

active

060759887

ABSTRACT:
Disclosed herein is the method of operating a cellular mobile station to identify a suitable cellular control channel for entering a camping state with a highest priority cellular service provider, based on data stored in the cellular mobile station, that is preferred to a current cellular control channel the mobile station is camping on. The method comprising the steps of: (a) measuring received signal strength of a plurality of available cellular control channels; (b) attempting to lock onto the available cellular control channels having highest signal strength; (c) determining if a locked onto cellular control channel is a highest priority cellular control channel and, if so, then camping on that cellular control channel, and otherwise returning to camping on the current control channel; and (d) periodically interrupting any of steps (a)-(c) to receive control data from the current cellular control channel and then returning to the interrupted step.

REFERENCES:
patent: 5586338 (1996-12-01), Lynch et al.
patent: 5711001 (1998-01-01), Bussan et al.
patent: 5903839 (1999-05-01), Mattila
Appendix M -- "Intelligent Roaming Requirements for PCS Phones" -- AT&T Wireless Services, Inc., ES-4019 Rev. 2.3 Nov. 1, 1996.
"Intelligent Roaming" -- SBC Communications, Inc. and BellSouth Cellular Corporation, RF45.3.6/97.06.11.18 Digital Cellular Standards.

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