Communication terminal device, communication system,...

Details Communication terminal device, communication system,... Communication terminal device, communication system,...

2011-08-02

2011-08-02

Pham, Chi H (Department: 2471)

Multiplex communications

Communication over free space

Message addressed to multiple destinations

Reexamination Certificate

active

07990903

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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Notification of Reason(s) for Refusal dated Jan. 6, 2009, from the corresponding Japanese Application.

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