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In a wireless mesh network (WMN) connected to the outer infrastructure such as the Internet, one or more gateways to connect to the outer network as well as surrounding nodes may frequently be congested by concentration of traffic from mobile stations. To resolve the congestion, we propose a new congestion control scheme for layer 3 WMNs. In the proposed scheme, nodes composing WMN backbone (MNs:...
Wireless mesh networks (WMNs) have emerged as a promising and cost-effective approach to extending the coverage range of wireless local area networks (WLANs) and providing last-mile broadband Internet access. Mesh routers and mesh clients are the key components of WMNs. Mesh routers perform the dual tasks of forwarding packets as well as providing network access to mesh clients. Mesh routers facilitated...
We have currently reached a phase where big shifts in the network traffic might impose to rethink the design of current architectures, and where new technologies, being pushed into market, will act as enabler of such changes. Taking into account the current scenario and its likely evolution as well, in this paper we examine the case for multi-path routing within the metropolitan access network. Through...
With the growing demands for computer network communication, it becomes increasingly important to secure the data flow path. The existing research related to security mechanisms only focuses on securing the flow of information in the communication networks. There is a lack of work on improving the performance of networks to meet quality of service (QoS) constrains for various applications. The security...
In a wireless mesh network, the traffic is aggregated at mesh router and most of them forwarded towards the Internet through GW (Internet gateway). Thus easily leads to a bottleneck for network performance at GW. Aimed to this problem ,we firstly treated the GW and mesh router as the alike node equivalently. Then used the logarithm-normal distribution model of shadow affect in wireless communication...
A number of transition mechanisms have been developed to support the interoperability between IPv4 and IPv6 during the time of migration from the existing IP version (IPv4) to the new IP version (IPv6). BDMS is one of the IPv4/IPv6 transition mechanisms that has been designed to enable IPv4-only hosts to communicate with IPv6-only hosts and vice versa; while DSTM has been designed to enable IPv6 hosts...
The design/planning of WMNs is a key phase before any deployment. Few proposals can be found in the open literature that deals with the design problem; however, they do not take into account all the parameters that have an impact on the outcome of the design and they assume the existence of a physical topology where the location and the characteristics of nodes (e.g., number of channels, number of...
Wireless Mesh Networks (WMNs) provide a cost-effective way of deploying a network and providing broadband Internet access. In WMNs a subset of nodes called gateways provide connectivity to the wired infrastructure (typically the Internet). Because traffic volume of WMNs is expected to be high, and due to limited wireless link capacity, gateways are likely to become a potential bottleneck. In this...
Wireless Mesh Networks (WMNs) support the cost-effective broadband access for Internet users. Although today's IEEE 802.11 PHY and MAC specifications provide multi-channel and multi-rate capabilities, exploiting available channels and data rates is a critical issue to guarantee high network performance. In multi-rate wireless networks, high-rate links heavily suffer from performance degradation due...
Wireless mesh networks will play an important role in the next-generation wireless communication systems as it can provide wide coverage and scalable broadband Internet access services. However, congestion in such networks may lead to throughput degradation, packet loss and longer transmission delay. Therefore, routing and traffic forwarding schemes which are aware of the congestion status of a wireless...
Choosing an optimal placement of mesh points (MPs) to maximize the network throughput is one of the key concerns in building a wireless mesh network (WMN). The routing protocol used in the WMN, which governs the traffic distribution over the network, also affects the network throughput. Therefore, in this paper, we take account of the multi-path routing protocol used in a WMN in finding the optimal...
Multihop wireless mesh networks (WMNs) are considered a promising technology to backhaul heterogeneous data traffic from wireless access networks to the wired Internet. WMNs are expected to support various types of applications with diverse quality of service (QoS) requirements, such as end-to-end packet delay, throughput, and packet-error-rate (PER). Recent works in this area are mainly concentrated...
Typically, VoIP traffic is deployed as best-effort traffic over Internet links. This voice traffic lacks effective and scalable end-to-end congestion control. We propose a new VoIP congestion control scheme called Voice-TFCC (voice TCP-friendly congestion control), that tries to keep the transmission protocol overhead to a minimum while maintaining a TCP-friendly throughput. Voice-TFCC adjusts packet...
Wireless mesh networks (WMNs) are well-promising future networks especially for ubiquitous connection to Internet. In this paper, we propose an analytical model in order to evaluate the maximum stable throughput of a WMN based on a simplified version of IEEE 802.11s MAC protocol. Our modeling approach is based on a multi-class open queueing network. In this respect, we map some of the important features...
In order to reduce the increasing packet loss rates caused by an exponential increase in network traffic, the Internet engineering task force is considering the deployment of active queue management techniques such as RED (random early detection). While active queue management in routers and gateways can potentially reduce packet loss rates in the Internet, this paper has demonstrated the inherent...
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