Telecommunications – Transmitter and receiver at separate stations – With control signal
Reexamination Certificate
2006-08-08
2006-08-08
Gesesse, Tilahun (Department: 2684)
Telecommunications
Transmitter and receiver at separate stations
With control signal
C455S522000, C455S115300, C455S226300
Reexamination Certificate
active
07088960
ABSTRACT:
Disclosed is a mobile communication system whereby, to reduce the connection time, a mobile station closely located to a base wireless station is permitted to continue to use a common channel for exchanging signals, and to suppress an increase in interference, an individual channel is set for a mobile station located near the edge of a cell, and to obtain a stabilized communication quality and to prevent an increase in the connection time, the probability that the transmission power will reach an upper limit is reduced. When communication between a mobile station and a wireless base station is started, the wireless base station measures the transmission power and the communication quality in the communication with the mobile station and the utilization ratio for a common channel, and compares the obtained values with predetermined threshold values. When the obtained values are lower than the threshold values, the wireless base station continues to use the common channel for signal transmission/reception. On the other hand, when the obtained values exceed the threshold values, the wireless base station sets an individual channel and sets a wireless channel so as to be capable of the continued use of the individual channel for the exchange of signals.
REFERENCES:
patent: 6374112 (2002-04-01), Widegren et al.
patent: 6539234 (2003-03-01), Hiramatsu et al.
patent: WO 00/62572 (2000-10-01), None
patent: WO 01/31950 (2001-05-01), None
patent: WO 02/43413 (2002-05-01), None
Kato Yasuhiro
Maebara Akihiro
Nakamura Takehiro
Ohto Yutaka
Onoe Seizo
Gesesse Tilahun
NTT DoCoMo Inc.
Oblon & Spivak, McClelland, Maier & Neustadt P.C.
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