Multiplex communications – Communication over free space – Message addressed to multiple destinations
Reexamination Certificate
2006-01-10
2011-11-01
Karikari, Kwasi (Department: 2617)
Multiplex communications
Communication over free space
Message addressed to multiple destinations
C370S432000, C370S260000, C370S261000, C370S262000, C370S263000, C370S474000, C370S475000, C455S502000, C455S501000, C455S518000, C455S519000
Reexamination Certificate
active
08050209
ABSTRACT:
A group communication method capable of performing group communication without additional functions provided on a network and with preventing excessive network traffic. Each communication device first transmits an enrollment message. A providing device groups the communication devices, creates a group key specifying the communication devices that are identified as a same subgroup, and transmits the group key to the communication devices. The communication devices receive and store the group key. To transmit distribution data to a subgroup, the providing device transmits the data together with data corresponding to the group key to a selected communication device of the subgroup. When the communication devices recognize the distribution data, the communication devices determine whether to receive the distribution data, based on the distribution data and the stored group key.
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“Japanese Office Action”, mailed by JPO and corresponding to Japanese application No. 2005-286369 on Mar. 23, 2010, with partial English translation.
Japan Patent Office, Office Action mailed Jul. 27, 2010, in connection with correspondent JP patent application No. 2005-286369; English-language partial translation.
Fujitsu Limited
Fujitsu Patent Center
Karikari Kwasi
LandOfFree
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