Telecommunications – Radiotelephone system – Zoned or cellular telephone system
Patent
1998-04-21
2000-07-04
Eisenzopf, Reinhard J.
Telecommunications
Radiotelephone system
Zoned or cellular telephone system
455436, 370332, 370335, H04Q 720
Patent
active
060850914
ABSTRACT:
The present invention relates a method for controlling hand off of a mobile terminal in CDMA mobile communication system which controls hand off of a mobile terminal by dividing the mobile terminals into mobile terminals of high mobile speed and mobile terminals of low mobile speed in CDMA mobile communication system. The invention includes the steps of: a first step of transmitting coordinates of three adjacent base stations to the mobile terminal by calculating the coordinates of three adjacent base stations by transmitting a pseudo noise code offset information of base stations of three adjacent cells which have the greatest pseudo noise code offset values to a base station which is currently servicing by measuring the pseudo noise code; a second step of calculating the distance between the mobile terminal and each of the base stations received from the base station which is currently servicing; a third step of proceeding to a traffic condition after setting up a call; and a fourth step of repeating the first step to the third step if a predetermined trace period is reached, or requesting a hand off and proceeding to the traffic condition according to measured speed by measuring the speed of the mobile terminal if a hand over event occurs, or aborting a position trace of the mobile terminal if the call is completed.
REFERENCES:
patent: 5513380 (1996-04-01), Ivanov et al.
patent: 5640414 (1997-06-01), Blakeney et al.
Cho Cheol Hye
Cho Moo Ho
Jin Go Whan
Yoo Dong Hwa
Bhattacharya Sam
Eisenzopf Reinhard J.
Electronics and Telecommunications Research Institute
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