Communication terminal device, communication system, communication method, and program
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United States of America Patent
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Aug 2, 2011
Grant Date -
Oct 26, 2006
app pub date -
Mar 7, 2006
filing date -
Mar 7, 2005
priority date (Note) -
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status (Latency Note)
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Abstract
A communication terminal device, a communication system, a communication method, and a program which can realize the functions of joining and exiting from a network in the middle of communication, detecting disappearance of stations (communication terminals), and/or changing over a coordinator function. The communication terminal has the capabilities of: detecting disappearance of a coordinator in the network by lack of reception of beacons and frames from other terminals, and, if its transmission timing at a certain TBTT is the shortest within a network, serving as a new coordinator itself to transmit beacons; and serving as a communication-holding coordinator having entered a predetermined mode, and transmitting a change request frame to a communication terminal to which changeover of a coordinator function is requested, thereby transferring the coordinator function to a communication terminal not functioning as the coordinator.
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