Method for correcting positioning errors of mobile station...

Details Method for correcting positioning errors of mobile station... Method for correcting positioning errors of mobile station...

2006-03-21

2006-03-21

Feild, Joseph (Department: 2681)

Telecommunications

Radiotelephone system

Zoned or cellular telephone system

C455S456100, C455S456200, C455S456500, C370S335000, C370S342000

Reexamination Certificate

active

07016694

ABSTRACT:
Disclosed is a method for correcting positioning errors of a mobile station positioning system in a CDMA mobile communication system. The method includes the steps of: delaying a PN code for a +64Chip period or a +64Chip+nChip period in a +64Chip delay element or a +64Chip+nChip delay element; combining the PN code transmitted to the MS with a PN code created by delaying the transmitted PN code for the +64Chip period or the +64Chip+nChip period in a combiner; in the MS, receiving the PN code of the specific BTS and the PN code created by delaying the PN code of the specific BTS; in a position determination entity (PDE) of the mobile station positioning system, analyzing the PN codes received from a mobile positioning center (MPC) to the MS, thereby determining whether the PN code of the specific BTS is transmitted to the MS via the repeater; and if it is determined that the PN code is transmitted, subtracting a delayed time value due to a corresponding repeater itself, thereby calculating a distance between the specific BTS and the MS in the PDE.

REFERENCES:
patent: 6832090 (2004-12-01), Riley et al.
patent: 2004/0110514 (2004-06-01), Kim et al.

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