Telecommunications – Radiotelephone system – Zoned or cellular telephone system
Reexamination Certificate
2007-10-09
2007-10-09
Ferguson, Keith (Department: 2618)
Telecommunications
Radiotelephone system
Zoned or cellular telephone system
C455S452200, C455S509000, C455S511000, C455S514000, C455S422100, C455S403000, C455S067110
Reexamination Certificate
active
11213887
ABSTRACT:
An estimator120of a mobile station100aof the present invention estimates traveling speed information which is a value variable with either a traveling speed of the mobile station or a variation in the traveling speed. A comparison unit130or a comparison unit320compares the traveling speed information estimated by the estimator with a threshold defined as a value of traveling speed information for achieving a desired level of communication quality which varies depending on the traveling speed. A selector150or a selector340selects an applicable frequency band in response to a result of comparison.
REFERENCES:
patent: 2003/0064729 (2003-04-01), Yamashita
patent: 2004/0082311 (2004-04-01), Shiu et al.
patent: 2006/0172704 (2006-08-01), Nishio et al.
patent: 5-259969 (1993-10-01), None
Nakamura Takehiro
Usuda Masafumi
Ferguson Keith
NTT DoCoMo Inc.
Oblon & Spivak, McClelland, Maier & Neustadt P.C.
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