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MyriaNed is a wireless sensor network (WSN) platform developed by DevLab (Research Alliance) |title=Distributed G-MAC: A flexible MAC protocol for Servicing Gossip Algorithms |url=http://repository.tudelft.nl/view/ir/uuid:6e2807a1-fdec-4fb4-9569-fd1ce2eb8264/ |publisher=Technical University Delft, The Netherlands |degree=M.Sc. |year=2008 }}〕 Messages are sent periodically and received by adjoining neighbours. Each message is repeated and duplicated towards all nodes that span the network; it spreads like a virus (hence the term epidemic communication). This is a very efficient and robust〔 〕〔 〕 protocol, mainly for two reasons: * First, the nodes do not need to know who is in their neighbourhood at the time of sending a message, there is no notion of an a-priori planned Routing, data is just shared instantaneously. * Second, the network is implicitly reliable since messages may follow different communication routes in parallel. The loss of a message between two nodes does not mean that the data is lost. Nodes can be added, removed or may be physically moving without the need to reconfigure the network. The GOSSIP protocol is a self-configuring network solution. The network may even be heterogeneous, where several types of nodes communicate different pieces of information with each other at the same time. This is possible due to the fact that no interpretation of the message content is required in order to be able to forward it to other nodes. Message communication is fully transparent, providing a seamless communication platform, where new functionality can be added later, without the need to change the installed base. Furthermore, MyriaNed is enabled to update the wireless sensor nodes software by means of “over the air” programming of a deployed network. ==Inspiration== Traditionally radio communication is organized according to the master-slave philosophy. The way two nodes communicate is point-to-point. A command is sent top-down and a confirmation is sent bottom-up between two hierarchical levels. However in biology this is organized differently. For instance adrenaline in the human body works completely different. This message (hormone and neurotransmitter) is sent to different types of cells. Every cell knows what to do with this message (increase heart rate, constrict blood vessels, dilate air passages) and does not sent a confirmation. This is the inspiration for MyriaNed in a nutshell. Another inspiration is the basic radio broadcasting principle. A radio with an antenna is made to send and receive a message to and from every direction. Implicitly it is not optimized to perform point-to-point communication. Wires are ideally suitable for that because they always link two devices. Looking at wireless communication, it should be structured in such a way that it uses the potential of radio transmission. The third inspiration is that of human gossiping. The term is sometimes associated with spreading misinformation of trivial nature but the way information is disseminated is one of the oldest and most common in nature. Information is generated by a source and gossiped to its neighbours. They spread the message to their neighbours, thereby exponentially increasing the number of people familiar with the information. Together these three inspirations led to the development of the MyriaNed platform. There is no master-slave structure in the network rather each node is hierarchically equal. MyriaNed uses biological routing which is random and independent of the function of the node. Each node decides what to do with a message. Furthermore it sends the message to all its neighbours thereby using the basic radio communication characteristics. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「MyriaNed」の詳細全文を読む スポンサード リンク
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