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Wireless sensor networks suffer from the secure threat, which leads to excessive energy consumption and the expense of increased transmission delay. In this paper, a secure routing algorithm is proposed. The node evaluates the neighbor node by the trust value. The trust value of node is calculated by the accuracy rate of messages exchanging between two nodes. The trusted neighbor nodes set of the...
The storage resource of node is very limited in wireless sensor networks. The buffer of data message is base for the working of applications in the nodes. How to configure the reasonable size of buffer has become the research focus in the limited storage hardware. However, the size is decided by the length of message queue in buffer. Based on the architecture of wireless sensor networks system, the...
Hello protocol is widely used in geographic routing protocols to obtain and maintain neighbor table. However in highly dynamic networks, the information stored in the neighbor table is often outdated causing retransmissions and rerouting. A novel Two-hop Hello protocol (T-Hello) is proposed aiming to improve the accuracy of neighbor table. By exchanging beacon messages within two-hop scope, location...
Mobile ad hoc networks have no support infrastructure and show a highly dynamic character. Due to its mobility, multi-hop communication, energy limitation and uncertainty of wireless communication, data transmission in network, namely routing, becomes a key problem to be solved. Most existing routing protocols based on topology information have a weak extensibility and a bad support to QoS. To solve...
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