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A wireless mesh employing directional antenna, termed DMesh in this paper, can greatly extend coverage and improve spatial reuse of wireless channels. As beaming direction of the antennas changes network topology which in turns affects routing and channel decisions, we address in this work how to jointly optimize topology (in terms of beaming directions of antennas), routing and channel assignment...
We consider the channel assignment problem in wireless mesh networks. Due to the limited number of radio interfaces that each node is equipped with, channel assignment must ensure that the interface constraint is obeyed, i.e., the number of different channels assigned to the links incident on a node must be no greater than the number of interfaces the node is equipped with. However, interface constraint...
This paper quantifies the impact of topological characteristics on the performance of single radio multichannel IEEE 802.11 mesh networks. Topological characteristics are the number of nodes per subnetwork, the hop count, the neighbor node density, the hidden nodes, the number of nodes in the neighborhood of the gateway, and the hidden nodes in the neighborhood of the gateway. Network performance...
One of the challenges in Multi-Radio Multi-Channel Wireless Mesh Networks is the assignment of channels to links such that connectivity is ensured and interference is minimized. Two links that are within interference range of each other could be assigned the same channel, which causes co-channel interference and decreases network throughput. In this paper, we identify the above problem in the Topology-controlled...
Wireless Mesh network (WMN) are dynamically self-organizing and self-configured, with the nodes in the network automatically establishing an ad-hoc network and maintaining the mesh connectivity. The ability to use multiple-radios and multiple channels can be cashed to increase aggregate throughput of wireless mesh network. Thus the efficient use of available interfaces and channels becomes the key...
Wireless Mesh Networks aim to provide high-bandwidth broadband connections to a large community and thus, should be able to accommodate a large number of users accessing the Internet. Due to high estimated traffic volume in Wireless Mesh Networks, scalability and fault tolerance become important requirements in algorithm design. We propose a Failure Recovery Mechanism (FRM) for the channel assignment...
Wireless mesh networks (WMNs) are comprised of nodes with multiple radio interfaces and provide broadband residential internet access or connectivity to temporal events. Our goal is to simplify the network deployment of such a mesh network, and towards that we are presenting procedures for automatic configuration and optimisation of the network. We first present an architecture framework that supports...
Wireless Mesh Networks (WMNs) have the potential for improving network capacity by employing multiple radios and multiple channels (MRMC). Channel Assignment (CA) is a key issue that plays vital role in defining WMN throughput by efficient utilization of available multiple radios and channels there by minimizing network interference. The two important issues that are needed to be addressed by CA algorithm...
Hybrid wireless-optical broadband access network (WOBAN) optimizes the cost and performance of an access network. A cost-effective way of increasing the capacity of the wireless part of a WOBAN is to assign multiple radios to the wireless nodes. An efficient channel assignment scheme is essential to reduce delay and contention in the wireless front-end of WOBAN. We study a channel assignment scheme...
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...
Employing multiple channels can effectively improve the network capacity in wireless mesh networks (WMNs). In multi-radio multi-channel WMNs, the channel assignment problem is to assign each radio a channel such that the network capacity is maximized. Since whether two nodes can communicate with each other depends on the channels they use, different channel assignments may lead to different network...
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