Telecommunications – Radiotelephone system – Zoned or cellular telephone system
Reexamination Certificate
2007-08-28
2007-08-28
Trost, William (Department: 2617)
Telecommunications
Radiotelephone system
Zoned or cellular telephone system
C455S063100, C455S450000, C455S452100, C455S509000, C370S329000, C370S332000, C370S431000, C370S437000
Reexamination Certificate
active
10911472
ABSTRACT:
At the time of a normal operation, a second channel change message30bis transmitted from the AP to each terminal before a time T0until a channel change that is included in a first channel change message30aelapses, thereby all terminals that received this message30b, and the AP stop changing the channel. At the time of interference occurrence, setting a time until a channel change to be filed in a third channel change message30dto a time equal to or less than a lapse time until the channel change at the time point of transmitting this message30dto transmit it to each terminal from the AP allows the terminal that failed to receive the message at the time of the interference occurrence to make a channel change without causing a connection to the AP to be disconnected.
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Dickstein , Shapiro, LLP.
Ewart James D
NEC Corporation
Trost William
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