Telecommunications – Radiotelephone system – Zoned or cellular telephone system
Reexamination Certificate
2007-05-01
2007-05-01
Feild, Joseph (Department: 2617)
Telecommunications
Radiotelephone system
Zoned or cellular telephone system
C455S509000, C455S522000, C370S335000
Reexamination Certificate
active
10496074
ABSTRACT:
In a synchronization scheme, for example for establishing a channel in a UMTS radio communication system, when a user device (or user equipment, UE) such as a mobile terminal is establishing a channel with a network, the user device transmits signals on the uplink DPCCH, and the power of these signals is ramped up from a calculated initial power level until the transmission is detected by the receiver, i.e. until the receiver has obtained synchronization to the uplink signal.
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Schulist et al., “Link level performance results for a WCDMA random access scheme with preamble power ramping and fast acquisition indication”, Gateway to 21stCentury Communications Village. VTC 1999-Fall, IEEE VTS 50thVehicular Technology Conference (Cat. No. 99CH36324), Amsterdam, pp. 2581-2585, vol. 5, XP002234741.
Frank Georg
Gerstenberger Dirk
Granzow Wolfgang
Cameron, Esq. Michael
Doan Phuoc
Feild Joseph
Telefonaktiebolaget LM Ericsson (publ)
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