Telecommunications – Radiotelephone system – Zoned or cellular telephone system
Reexamination Certificate
2003-06-10
2008-08-12
Nguyen, Duc M (Department: 2618)
Telecommunications
Radiotelephone system
Zoned or cellular telephone system
C455S452100, C455S453000
Reexamination Certificate
active
07412243
ABSTRACT:
A radio network controller11for controlling a base station in a CDMA or W-CDMA mobile communication system includes a state measurement part21, a call control processing part31, and a frequency load distribution processing part41. The frequency load distribution processing part41is provided with a frequency state change processing42for updating each frequency's state data44and next assignment management data45by referring a frequency state change notice notified when a state is changed by call control, and frequency assignment control processing43for selecting a frequency by referring to the updated next assignment management data and for returning a frequency assignment response, in response to a frequency assignment request transmitted from the call control processing part. With this constitution, load distribution of multiple frequencies is achieved by deriving a next assigned frequency on the basis of operating states of each frequency.
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Katzela et al., “Channel Assignment Schemes for Cellular Mobile Telecommunication Systems”, A Comprehensive Survey, IEEE Personal Communications, pp. 10-31 (Jun. 1996).
Dickstein , Shapiro, LLP.
NEC Corporation
Nguyen Duc M
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