Multi-criteria handoff algorithms have been playing a more important role than the traditional handoff algorithms.In order to balance the satisfaction of users and the efficiency of networks,it is necessary to develop...Multi-criteria handoff algorithms have been playing a more important role than the traditional handoff algorithms.In order to balance the satisfaction of users and the efficiency of networks,it is necessary to develop new technologies to improve the validity of handoff algorithms.Intelligent and optimized handoff algorithms in hybrid networks that integrate Ad hoc and mobile cellular systems are well-adaptive and robust.They are able to implement handoffs adaptively,according to specific multi-factors such as different Quality of Service(QoS)requirements,network states and mobile node conditions in the future hybrid networks.Therefore,these intelligent and optimized algorithms can make more effective handover decision,and accordingly improve the system’s performance.The future research will tackle intelligent or optimized vertical handoff algorithms for integrated Ad hoc and mobile cellular networks to improve their whole system performance.展开更多
An ants-based on-demand routing algorithm （AORA） specialized for mobile ad hoc networks is proposed. AORA measures the network＇s traffic information including delivery time, route energy etc. by the continuous deli...An ants-based on-demand routing algorithm （AORA） specialized for mobile ad hoc networks is proposed. AORA measures the network＇s traffic information including delivery time, route energy etc. by the continuous delivery of data packets, then calculates the compositive parameter for each route which can be seen as the stigmity and uses it to choose the comparatively optimal route in real time. To adjust the weight of each traffic information, the algorithm can meet the different demand of the network＇s user. Multipath source self repair routing （MSSRR） algorithm and dynamic source routing （DSR） can be seen as the special samples of AORA. The routing overhead is not increased in this algorithm. By using simulation, it can be seen that the performance of AORA is better than that of DSR in all scenarios obviously, especially the delivery fraction is increased by more than 100 96.展开更多
A multipath source self repair routing (MSSRR) algorithm for mobile ad hoc networks is proposed. By using multiple paths which can be repaired by themselves to transmit packets alternately, the network's load is b...A multipath source self repair routing (MSSRR) algorithm for mobile ad hoc networks is proposed. By using multiple paths which can be repaired by themselves to transmit packets alternately, the network's load is balanced, the link state in the network can be checked in time, the number of the times the route discovery mechanism starts is decreased. If only one route which will be broken can be used to transmit the packets, the route discovery mechanism is restarted.The algorithm is implemented on the basis of dynamic source routing (DSR). The effect of MSSRR on lifetime of the access from the source to the destination and the overhead is discussed. Compared with the performance of DSR,it can be seen that the algorithm can improve the performance of the network obviously and the overhead almost does not increase if the average hop count is larger.展开更多
Ad hoc网络是一种多跳移动自组织网络 ,它需要特殊的体系结构来支持路由、管理和其他网络功能。首先介绍了 Ad hoc网络的一些显著特点 ,然后详细分析了 Ad hoc网络的体系结构。接着介绍了一种性能较好的分簇算法并讨论了簇维护机制和码...Ad hoc网络是一种多跳移动自组织网络 ,它需要特殊的体系结构来支持路由、管理和其他网络功能。首先介绍了 Ad hoc网络的一些显著特点 ,然后详细分析了 Ad hoc网络的体系结构。接着介绍了一种性能较好的分簇算法并讨论了簇维护机制和码字分配等问题。展开更多
分簇算法即根据系统要求将节点组成可管理的集合 ,继而形成满足系统要求的合理的网络结构 ,它直接影响 Ad hoc网络的各种性能指标。首先阐述了 Ad hoc网络的体系结构和存在的问题 ,然后介绍了与分簇算法相关的一些定义和分簇算法的目标...分簇算法即根据系统要求将节点组成可管理的集合 ,继而形成满足系统要求的合理的网络结构 ,它直接影响 Ad hoc网络的各种性能指标。首先阐述了 Ad hoc网络的体系结构和存在的问题 ,然后介绍了与分簇算法相关的一些定义和分簇算法的目标。接着对 Ad展开更多
在无线 Ad Hoc网络中 ,采用分簇的方法将移动自组网进行簇划分 ,形成由簇头、簇间节点和簇内节点构成的分簇网络结构 ,从而提供对无线 Ad Hoc网络资源进行管理的一种简便构架 .文中基于无线 Ad Hoc网络簇结构的特点 ,提出了一种在无线 A...在无线 Ad Hoc网络中 ,采用分簇的方法将移动自组网进行簇划分 ,形成由簇头、簇间节点和簇内节点构成的分簇网络结构 ,从而提供对无线 Ad Hoc网络资源进行管理的一种简便构架 .文中基于无线 Ad Hoc网络簇结构的特点 ,提出了一种在无线 Ad Hoc网络中实现的多播路由算法 .该算法通过对无线 Ad Hoc网络分簇 ,形成由簇头和簇间节点构成的虚拟骨干网 ,再对其进行回路检测和冗余剪枝算法处理 ,最终得到一个能满足多播要求的多播树 .通过对仿真实验结果的分析 ,该算法具有稳定的数据包发送率 ,较低的路由建立时间 .展开更多
基金This work was funded by the High- tech Research and Development Program of China (863 Program) under Grant 2006AA01Z208.
文摘Multi-criteria handoff algorithms have been playing a more important role than the traditional handoff algorithms.In order to balance the satisfaction of users and the efficiency of networks,it is necessary to develop new technologies to improve the validity of handoff algorithms.Intelligent and optimized handoff algorithms in hybrid networks that integrate Ad hoc and mobile cellular systems are well-adaptive and robust.They are able to implement handoffs adaptively,according to specific multi-factors such as different Quality of Service(QoS)requirements,network states and mobile node conditions in the future hybrid networks.Therefore,these intelligent and optimized algorithms can make more effective handover decision,and accordingly improve the system’s performance.The future research will tackle intelligent or optimized vertical handoff algorithms for integrated Ad hoc and mobile cellular networks to improve their whole system performance.
文摘An ants-based on-demand routing algorithm （AORA） specialized for mobile ad hoc networks is proposed. AORA measures the network＇s traffic information including delivery time, route energy etc. by the continuous delivery of data packets, then calculates the compositive parameter for each route which can be seen as the stigmity and uses it to choose the comparatively optimal route in real time. To adjust the weight of each traffic information, the algorithm can meet the different demand of the network＇s user. Multipath source self repair routing （MSSRR） algorithm and dynamic source routing （DSR） can be seen as the special samples of AORA. The routing overhead is not increased in this algorithm. By using simulation, it can be seen that the performance of AORA is better than that of DSR in all scenarios obviously, especially the delivery fraction is increased by more than 100 96.
文摘A multipath source self repair routing (MSSRR) algorithm for mobile ad hoc networks is proposed. By using multiple paths which can be repaired by themselves to transmit packets alternately, the network's load is balanced, the link state in the network can be checked in time, the number of the times the route discovery mechanism starts is decreased. If only one route which will be broken can be used to transmit the packets, the route discovery mechanism is restarted.The algorithm is implemented on the basis of dynamic source routing (DSR). The effect of MSSRR on lifetime of the access from the source to the destination and the overhead is discussed. Compared with the performance of DSR,it can be seen that the algorithm can improve the performance of the network obviously and the overhead almost does not increase if the average hop count is larger.
文摘在无线 Ad Hoc网络中 ,采用分簇的方法将移动自组网进行簇划分 ,形成由簇头、簇间节点和簇内节点构成的分簇网络结构 ,从而提供对无线 Ad Hoc网络资源进行管理的一种简便构架 .文中基于无线 Ad Hoc网络簇结构的特点 ,提出了一种在无线 Ad Hoc网络中实现的多播路由算法 .该算法通过对无线 Ad Hoc网络分簇 ,形成由簇头和簇间节点构成的虚拟骨干网 ,再对其进行回路检测和冗余剪枝算法处理 ,最终得到一个能满足多播要求的多播树 .通过对仿真实验结果的分析 ,该算法具有稳定的数据包发送率 ,较低的路由建立时间 .
