排序方式： 共有27条查询结果，搜索用时 15 毫秒
1.
拓扑控制与拓扑维护是优化无线Adhot网络拓扑结构的重要方面,本研究以无线Adhot网络中各节点在失效情况下,为维护网络的连通性,提出一种以Dijkstra SPT算法为基础,以减少Adhot网络拓扑维护开销,低代价节能运行的最短路径树算法-ELSPT。其仿真实验表明,该算法有利于对Adhoc无线网络带宽的空间重利用,提高网络容量,减少分组碰撞的概率,对优化网络的拓扑控制和拓扑维护有着显著的有效性。 相似文献
2.
拓扑控制与拓扑维护是优化无线Ad hot网络拓扑结构的重要方面,本研究以无线Ad hot网络中各节点在失效情况下,为维护网络的连通性,提出一种以Dijkstra SPT算法为基础,以减少Ad hot网络拓扑维护开销,低代价节能运行的最短路径树算法—ELSPT。其仿真实验表明,该算法有利于对Ad hoc无线网络带宽的空间重利用,提高网络容量,减少分组碰撞的概率,对优化网络的拓扑控制和拓扑维护有着显著的有效性。 相似文献
3.
To increase the multicasting efficiency of Ad hoc networks, a fuzzy logic multicasting algorithm (FLMA) is proposed. FLMA adopts the fuzzy logic to tolerate the imprecise information caused by dynamic network topology. The two input variables of the fuzzy logic system are the relative degree of the additional coverage node number and the relative degree of the residual energy. The deferring time of rebroadcast is the output variable of the fuzzy logic system, which is used to optimize the priority of the nodes to rebroadcast. FLMA reduces the redundant retransmission and the chance of the contention and collision, while balances the energy consumption of the nodes. Simulation results reveal that the FLMA achieves better performance than BCAST in terms of the network lifetime, average end-to-end delay, the average number of drops per node and the throughput. 相似文献
4.
在Ad hoc网络里,移动节点通过多跳无线链路实现相互间的通信,开发一种能有效地找到节点间路由的动态路由协议就成为Ad hoc网络设计的关键。针对Ad hoc网络的特点,分析了现有的Ad hoc路由协议及其存在的不足,给出了对典型路由协议的改进方法,提出了一种分时路由协议,并且仿真实现。 相似文献
5.
苏云金芽孢杆菌新菌株S249 cry2Ad2的克隆及特征分析 总被引：1，自引：0，他引：1
根据GenBank中cry2Ad基因序列设计1对特异性引物,以苏云金芽孢杆菌新菌株S249质粒 DNA为模板,应用PCR扩增技术得到了1条大小约为2．0 kb的DNA片段(cry2Ad2)。通过引物步行法测定该片段长1919 bp,其中开放阅读框(ORF)长1902 bp,编码633个氨基酸;经DNASTAR软件分析,预测其蛋白分子量为70．72 ku,等电点pI=8．26。序列比较结果表明,该基因与cry2Ad类基因高度同源(同源性达99%)。该基因已在GenBank中登录,登录号为DQ219823,并被Bt δ-内毒素基因国际命名委员会正式命名为cry2Ad2。 相似文献
6.
TCP Veno Performance over Wireless Ad Hoc was studied. The performance of TCP Veno over SANET and MANET were simulated. The results show that the performance of TCP Veno is not good enough when it is working on the Wireless Ad Hoc, and is worse than TCP Reno over the Wireless one hopnetwork. 相似文献
7.
综述了Ad hoe网络中QoS保障方面的研究现状,描述和分析了目前在Ad hoc网络QoS中的QoS路由,QoS信令,MAC层QoS保障策略,动态自适应等几个主要研究领域所取得的一些成绩,同时也指出了其中所存在的一些问题及未来的研究方向。 相似文献
8.
WANG Zhang-sheng 《保鲜与加工》2011,(8):134-138
The security issues in mobile Ad hoc network, especially caused by inner malicious nodes are analyzed. By tracking the behavior of nodes, trust level of each node can be evaluated and managed; then actions of malicious nodes will be constrained and the security and reliability of entire network are enhanced. According to the features of Ad hoc. The scheme proposed in not only extends the conception of trust but also include the trust computation model and trust management mechanism. Simulation experiments show the novel scheme is more efficient than other trust schemes in traditional protocols. 相似文献
9.
Ad Hoc作为一种新型的无线、多跳、无中心分布式控制网络,它无需网络基础设施,具有很强的自组织性、鲁棒性、抗毁性和容易构建的特点,非常适合在森林灭火中构建一种应急方案。介绍了AdHoc网络的特点,对AdHoc在森林灭火中的应用进行分析,最后设计了基于AdHoc的森林灭火信息服务系统,为森林防火提供了很好的技术支持。 相似文献
10.
The traditional routing protocol for wireless mobile ad hoc networks is unable to achieve balanced energy consumption and could not adapt to the dynamic topology changes well.A novel on-demand rooting algorithm is proposed based on load balancing and mobility prediction.The proposed rooting algorithm excludes the unstable links in routing discovery,and allows the node with more energy forward the routing request packet preferentially.In addition,it adopts the active local routing recovery strategy by predicting the link connection time,and finishes the repair work before the link being actually failure.The simulation experiments demonstrate that,comparing with the traditional AODV protocol,with slight increase of the rooting control overhead,the proposed algorithm increases the average packet delivery ratio,decreases the average end-to-end delay of the data packets,and achieves load balancing in the network and prolong the life-span of the network,which shows the proposed algorithm is highly practical. 相似文献