Telecommunications – Radiotelephone system – Zoned or cellular telephone system
Reexamination Certificate
2007-03-20
2007-03-20
Nguyen, Duc M. (Department: 2617)
Telecommunications
Radiotelephone system
Zoned or cellular telephone system
C455S436000, C455S439000
Reexamination Certificate
active
10060248
ABSTRACT:
When a handover standby threshold falls below a received power of perch channel from a base station150-1of a communication partner, a mobile station110sends a handover standby operation request to a base station control apparatus130,and notifies of history of movement of itself and receives powers of perch channels from base stations150-2–150-4surrounding the communication partner (mobile station information). The base station control apparatus130compares the mobile station information with history of mobile station information so that a handover destination candidate base station is selected and sent to the mobile station110.The mobile station110switches the communication partner to the handover destination candidate base station when received power of the perch channel from the base station150-1falls below a handover threshold.
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Hayashi Takahiro
Ishikawa Yoshihiro
Iwamura Mikio
Nakamura Takehiro
Ofuji Yoshiaki
Cai Wayne
Nguyen Duc M.
NTT DoCoMo Inc.
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