针对无线局域网(Wireless Local Area Networks,WLAN)中密集部署无线接入点(Access Point,AP)导致的能耗和同频干扰问题,提出了一种基于贝叶斯博弈的节能机制(BaYesian Game based Energy Saving scheme,BYG-ES).首先,对通用AP设备的能...针对无线局域网(Wireless Local Area Networks,WLAN)中密集部署无线接入点(Access Point,AP)导致的能耗和同频干扰问题,提出了一种基于贝叶斯博弈的节能机制(BaYesian Game based Energy Saving scheme,BYG-ES).首先,对通用AP设备的能耗进行测量与分析,构建AP发射功率-负载-能耗的关系模型;然后,基于该关系模型及软件定义网络控制器实时收集的网络状态信息,设计基于贝叶斯博弈的能耗优化模型;最后,利用社会选择函数求解能耗优化模型,获得干扰限制下最优的休眠AP集合和发射功率配置规则,完成用户流量卸载和AP发射功率的调整,同时保证AP参与博弈的诚实性.实验结果表明,BYG-ES节能机制能在减小系统能耗的同时提高网络性能.展开更多
A d hoc网络的拓扑对于网络性能有很大的影响,密度高的拓扑会因干扰的加大而降低容量,稀疏的拓扑又会因为链路失效和网络分割而易受到攻击。现有的拓扑控制算法一般使用的都是纯粹的集中式或分布式方法。这种新的混合式的拓扑控制结构...A d hoc网络的拓扑对于网络性能有很大的影响,密度高的拓扑会因干扰的加大而降低容量,稀疏的拓扑又会因为链路失效和网络分割而易受到攻击。现有的拓扑控制算法一般使用的都是纯粹的集中式或分布式方法。这种新的混合式的拓扑控制结构结合了集中式和分布式算法两者的优点,通过调整节点的发送功率,能够保证网络拓扑实现两连通,提高了网络的性能。展开更多
Designing a multi-constrained QoS (Quality of service) communication protocol for mission-critical applications that seeks a path connecting source node and destination node that satisfies multiple QoS constrains such...Designing a multi-constrained QoS (Quality of service) communication protocol for mission-critical applications that seeks a path connecting source node and destination node that satisfies multiple QoS constrains such as energy cost, delay, and reliability imposes a great challenge in Wireless Sensor Networks (WSNs). In such challenging dynamic environment, traditional routing and layered infrastructure are inefficient and sometimes even infeasible. In recent research works, the opportunistic routing paradigm which delays the forwarding decision until reception of packets in forwarders by utilizing the broadcast nature of the wireless medium has been exploited to overcome the limitations of traditional routing. However, to guarantee the balance between the energy, delay and reliability requires the refinement of opportunistic routing through interaction between underlying layers known as cross-layer opportunistic routing. Indeed, these schemes fail to achieve optimal performance and hence require a new method to facilitate the adoption of the routing protocol to the dynamic challenging environments. In this paper, we propose a universal cross-layered opportunistic based communication protocol for WSNs for guaranteeing the user set constraints on multi-constrained QoS in low-duty-cycle WSN. Extensive simulation results show that the proposed work, Multi-Constrained QoS Opportunistic routing by optimal Power Tuning (MOR-PT) effectively achieves the feasible QoS trade-off constraints set by user by jointly considering the power control and selection diversity over established algorithms like DSF [1] and DTPC [2].展开更多
文摘针对无线局域网(Wireless Local Area Networks,WLAN)中密集部署无线接入点(Access Point,AP)导致的能耗和同频干扰问题,提出了一种基于贝叶斯博弈的节能机制(BaYesian Game based Energy Saving scheme,BYG-ES).首先,对通用AP设备的能耗进行测量与分析,构建AP发射功率-负载-能耗的关系模型;然后,基于该关系模型及软件定义网络控制器实时收集的网络状态信息,设计基于贝叶斯博弈的能耗优化模型;最后,利用社会选择函数求解能耗优化模型,获得干扰限制下最优的休眠AP集合和发射功率配置规则,完成用户流量卸载和AP发射功率的调整,同时保证AP参与博弈的诚实性.实验结果表明,BYG-ES节能机制能在减小系统能耗的同时提高网络性能.
文摘A d hoc网络的拓扑对于网络性能有很大的影响,密度高的拓扑会因干扰的加大而降低容量,稀疏的拓扑又会因为链路失效和网络分割而易受到攻击。现有的拓扑控制算法一般使用的都是纯粹的集中式或分布式方法。这种新的混合式的拓扑控制结构结合了集中式和分布式算法两者的优点,通过调整节点的发送功率,能够保证网络拓扑实现两连通,提高了网络的性能。
文摘Designing a multi-constrained QoS (Quality of service) communication protocol for mission-critical applications that seeks a path connecting source node and destination node that satisfies multiple QoS constrains such as energy cost, delay, and reliability imposes a great challenge in Wireless Sensor Networks (WSNs). In such challenging dynamic environment, traditional routing and layered infrastructure are inefficient and sometimes even infeasible. In recent research works, the opportunistic routing paradigm which delays the forwarding decision until reception of packets in forwarders by utilizing the broadcast nature of the wireless medium has been exploited to overcome the limitations of traditional routing. However, to guarantee the balance between the energy, delay and reliability requires the refinement of opportunistic routing through interaction between underlying layers known as cross-layer opportunistic routing. Indeed, these schemes fail to achieve optimal performance and hence require a new method to facilitate the adoption of the routing protocol to the dynamic challenging environments. In this paper, we propose a universal cross-layered opportunistic based communication protocol for WSNs for guaranteeing the user set constraints on multi-constrained QoS in low-duty-cycle WSN. Extensive simulation results show that the proposed work, Multi-Constrained QoS Opportunistic routing by optimal Power Tuning (MOR-PT) effectively achieves the feasible QoS trade-off constraints set by user by jointly considering the power control and selection diversity over established algorithms like DSF [1] and DTPC [2].
