Ad Hoc Communication Technology

Characteristics

Fujitsu's proprietary ad hoc communication technology is a new ad hoc routing protocol that automatically performs network configuration and restores itself in an event of a failure.

Compared with existing ad hoc communication protocols, it enables ad hoc communication on a larger scale while maintaining stable communication quality. This technology makes sensor networks that utilize large numbers of sensors more practical and substantially reduces operational costs.

Automatic Construction of Large-Scale Networks

The unique algorithm enables the configuration of a large-scale ad hoc network with stable communication quality (1,000 nodes per gateway).
The network can be further expanded easily by adding additional gateways that now enables application to social infrastructures.

Quick Auto Restoration

Each node monitors the quality of communication with the surrounding nodes and learns the optimal communication route. The communication route can be switched instantaneously depending on the circumstances to provide stable communication quality.
In the event of a network or device failure or an increase in traffic, individual nodes autonomously select alternative paths to restore and maintain communication.

Applicable to Wired Networks

Ad hoc communication technology was generally being developed for wireless networks, but WisReed supports wired networks as well.
Devices and wiring can be added and removed easily without any network configurations or settings.

WisReed's Routing Mechanism

Existing ad hoc communication technologies frequently transmit control packets to find communication routes, but as communication devices are added, this places strain on the network and lowers the quality of communication (in practical application, the maximum is around 50 devices).
WisReed, on the other hand, has been successful in substantially reducing the number of control packets required.
Individual nodes constantly monitor a wide range of information, including the quality of communication and status of surrounding nodes to select the best route. When communicating, no unnecessary route searches are performed and the data is sent to the predetermined target node.
Each node forms the optimal route while propagating quality assessments to surrounding nodes together with the communication of data. This enables the nodes to consistently and efficiently select the routes with the most stable quality.

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