Wireless sensor network (Wireless Sensor Network, WSN) is be in by deploy inside the area that monitor many and cheap composition of miniature sensor node, jump from constituent network system through a kind when wireless communication means forms many, he is current get attention fully in the world, involve the forward position with compositive height of across of much discipline, height, knowledge to research a field, integrated sensor technology, embedded technology of contemporary network and computational technology, wireless communication technology, distributed information processing, the information that its purpose is object of the synergic ground perception, perception in collect and handling a network to cover area (be like light intensity, temperature, humidity, noise, shake and the physical phenomenon) such as harmful gas chroma, send with wireless means go out, through wireless network final hair sends observer. Object of sensor, perception and observer made 3 element of sensor network. If say Internet made the information world on logic, changed the communication way between person and person, network of so wireless sensor is the information world that gets on logic and the physical world that go up objectively confluence is together, change the interactive mode of the mankind and nature. People can feel objective world directly through sensor network, expand the function of existing network and mankind know the capacity of the world greatly thereby. Wireless sensor network serves as a burgeoning technology, more and more get the attention of domestic and international academia and engineering group, its are monitored in martial scout, environment, medical treatment nurses, control of household of dimensional exploration, intelligence, industry and domain of other business application are shown gave wide applied perspective, be considered as one of technologies of will tremendous to 21 centuries generation influence.

The characteristic of network of 1 wireless sensor

Wireless from group network (Mobile Ad-Hoc Network) is a kind by a few comprise to about a hundred node, those who use network of wireless communication means, dynamic group is much jump network of mobile sex reciprocity. Its purpose is to adopt dynamic way by manage a technology with shift, transmit the multimedia iformation flow that has service quality demand. Normally node has persistent energy supply.

Wireless sensor network although with wireless the place that having likeness from group network, but also put in very big difference at the same time. Sensor network is compositive monitor, the network system of control and wireless communication, node amount is more huge, a network has on 1000 to go up even 10 thousand node; Node distributings more concentrated; Because environmental influence and energy are extinct, node appears more easily breakdown; Environmental interference and node breakdown are easy cause network develop to attack structural change; Connecting general reason condition to fall, most network node is fixed immobile. Additional, capability of the energy that network node has, processing, storage capacity and communication ability very finite. The first design target of traditional and wireless network is to offer high service quality and efficient bandwidth to use, just consider managing the sources of energy next; And the first design target of sensor network is node energy is efficient use. This also is one of distinction with sensor network and traditional and wireless the most important network.
Previous12 Next