Sunday, March 28, 2010

wireless multi-hop network

Ad Hoc Network is a wireless multi-hop network without pre-established infrastructure. The nodes work as both wireless terminal nodes with sending and receiving functions and router which forward information, All of the nodes are equal. There is no central northface jackets controller and the MANET is completely distributed structure. Because of its cheap womens nike shoes non-infrastructure and network topology changing in dynamic characteristics, Ad Hoc network is faced with much new problems and challenges which are different from traditional cheap men's nike shoes networks, including the routing problem, the energy problem, QOS and security issues.In Ad hoc network, energy nike running shoes consumption is a very important standard of system performance. The energy issue not only has an impact on network performance, and even is related to the survival of the entire network. In order to reduce energy consumption, network routing algorithms use constraint to the nike shoes selection of the most low-power routing, but it would affect the system throughput ability and the energy balance between the nodes. Though the energy consumption of whole network reduces, if the energy of individual nodes consumes too fast, it would impact the network connectivity and then shorten the lifetime of the network. Therefore, the node energy consumption balance is also a very key issue compare with energy consumption of network, especially in clustering routings.
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