Patent ID: 9432877
Filing Date: 2016-08-30
CPC Classification: H04W

Claim Text:
1. An information sharing system in which information is shared between communication devices that form an ad hoc network, comprising: a plurality of communication devices that wirelessly transmit notification messages that comprise a first summary vector identifying content held by the transmitting communication device with other communication devices without going through an access point, wherein each communication device comprises: an internal deduction portion that, based on a reception history comprising a log of notification messages received in additional summary vectors from each of the other communication devices, deduces which information has been notified to neighboring communication devices based on the reception history of at least two communication devices including the neighboring communication devices; a duplication determination portion that determines whether or not the information deduced by the internal deduction portion and that has been notified by said other communication devices matches information held by an own communication device; and an information exchange portion that, based on a determination that the information does not match, transmits a notification message that contains the information currently held by said own communication device that is different from the information that has been notified by said other communication devices deduced by the internal deduction portion.