Wireless mesh network （WMN） is a new multi-hop network for broadband accessing to intemet. However, there exists a server unfairness problem based on different hop distances in WMN. To solve this problem, the unfair...Wireless mesh network （WMN） is a new multi-hop network for broadband accessing to intemet. However, there exists a server unfairness problem based on different hop distances in WMN. To solve this problem, the unfairness issue was analyzed in test-bed experiment and NS2 simulation. A dynamic queue management scheme E-QMMN was proposed, which allocates the queue buffer according to the hop distance of every flow. The experimental results show that the proposed scheme can not only increase the hop distance fairness of the legacy scheme at most 50%, but also reduce the average round trip time at least 29% in congested WMN environments.展开更多
Communication security is a critical aspect of QoS provisioning in wireless mesh network （WMN）. Because of the inherent characteristics of WMN, conventional security mechanisms cannot be applied. In order to guarant...Communication security is a critical aspect of QoS provisioning in wireless mesh network （WMN）. Because of the inherent characteristics of WMN, conventional security mechanisms cannot be applied. In order to guarantee the communication security, a novel communication security mechanism is proposed. The mechanism uses a communication encryption scheme to encrypt data packets and employs a risk avoidance scheme to avoid the malicious nodes during communications. Simulation results indicate that the mechanism is able to provide secure communication effectively and reduce the damage of attacks through multiple paths.展开更多
Wireless mesh networks (WMNs) are new kind of networking technology which facilitate the extension of wireless local area networks into wide areas and have emerged as a key technology for next-generation wireless netw...Wireless mesh networks (WMNs) are new kind of networking technology which facilitate the extension of wireless local area networks into wide areas and have emerged as a key technology for next-generation wireless networking.Due to the advantages of WMNs over other wireless networks,they are now a promising approach for future network access.Typical applications range from home broadband Internet access and community networking to wireless metropolitan area networks.Meanwhile,the considerable efforts in academic range from network architecture,network capacity,layered communication protocols,security,cross-layer design,etc.Still many technical challenges exist in designing affordable,reliable,and sustainable WMNs infrastructures.In order to provide a better understanding of these challenges,this paper presents a detailed investigation of current technologies for WMNs,and it will help to guide and refocus future works in this area.展开更多
基金Projects(61163060,61103204,60963022) supported by the National Natural Science Foundation of ChinaProject(D018023) supported by the Natural Science Foundation of Guangxi Province,ChinaPostdoctoral Funding of Central South University,China
文摘Wireless mesh network （WMN） is a new multi-hop network for broadband accessing to intemet. However, there exists a server unfairness problem based on different hop distances in WMN. To solve this problem, the unfairness issue was analyzed in test-bed experiment and NS2 simulation. A dynamic queue management scheme E-QMMN was proposed, which allocates the queue buffer according to the hop distance of every flow. The experimental results show that the proposed scheme can not only increase the hop distance fairness of the legacy scheme at most 50%, but also reduce the average round trip time at least 29% in congested WMN environments.
基金This project was supported by the National Natural Science Foundation of China (60573129).
文摘Communication security is a critical aspect of QoS provisioning in wireless mesh network （WMN）. Because of the inherent characteristics of WMN, conventional security mechanisms cannot be applied. In order to guarantee the communication security, a novel communication security mechanism is proposed. The mechanism uses a communication encryption scheme to encrypt data packets and employs a risk avoidance scheme to avoid the malicious nodes during communications. Simulation results indicate that the mechanism is able to provide secure communication effectively and reduce the damage of attacks through multiple paths.
基金supported in part by the National High Technology Research and Development Program of China (863 Program) (No. 2006AA01Z232,2009AA01Z212, 2009AA01Z202)Key Science and Technology Supporting Plan Item of Jiangsu Province(No. BE2008134)Special Fund of Trans-formation of Scientific and Technological Achievements of Jiangsu Province(No. BA2007012)
文摘Wireless mesh networks (WMNs) are new kind of networking technology which facilitate the extension of wireless local area networks into wide areas and have emerged as a key technology for next-generation wireless networking.Due to the advantages of WMNs over other wireless networks,they are now a promising approach for future network access.Typical applications range from home broadband Internet access and community networking to wireless metropolitan area networks.Meanwhile,the considerable efforts in academic range from network architecture,network capacity,layered communication protocols,security,cross-layer design,etc.Still many technical challenges exist in designing affordable,reliable,and sustainable WMNs infrastructures.In order to provide a better understanding of these challenges,this paper presents a detailed investigation of current technologies for WMNs,and it will help to guide and refocus future works in this area.
