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In order to solve the problem that the coverage area of ZigBee tree network is restricted by the depth, so that new nodes can not join the network and become a orphan, this paper introduces a project of expanding network coverage area. In this project, through the manual of the button, we can choose a qualified end device to convert to the router configuration, then the device as a router receives...
To solve the problem that the cluster heads consume a lot of energy in the cluster tree network, a new method which can balance energy consumption and improve the energy utilization ratio is proposed in this paper. This method employs the existed network address resource to select the reserved cluster head. By this method, the convert of network structure which caused by changing cluster head is also...
This article gives analysis AODVjr routing protocol used by Zigbee technology based on IEEE802.15.4 standard in detail. It supposed to carry out routing across bad node in the use of local repair mechanism of AODVjr routing protocol. The simulation proved that the improved routing protocol shortened the time to repair the break communication link; it has an active significance for shorter delay because...
It is a traditional method that using serial port or JTAG port to download application programmes with complex multi-layer protocol or operation system core into the target evaluation board. However it has become harder to satisfy the needs of the increasing extended development requirement because of the speed limit. The paper proposes a scheme that can complete the downloading operation to the evaluation...
The development trend of embedded technology need the web/server technology applies into embedded fields and provides a flexible remote device monitoring and management function based on Internet browser. But, due to the limitation of hardware resource and the low-efficiency of general purpose TCP/IP protocol stacks and protocol models, it is quite difficult to implement full TCP/IP protocol into...
The characteristics of pulp fibre influence the final qualities of paper production, but the phenomenon of intersectant, curled and bifurcate of the pulp fibre is very familiar, as a result the routine methods can hardly achieve the analysis and recognition of complex pulp fibre image preferably. The paper introduces the basic principle, structure and recognition tactics of the pulp fibre recognition...
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