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The hybrid wireless-optical broadband access network (WOBAN) is a novel promising hybrid access network. We can improve its performance effectively by improving the wireless network routing algorithm of it. This paper proposes a novel routing algorithm -- the minimum delay routing algorithm (MDRA). In the algorithm, A time delay estimation method is combined with the Dijkstra algorithm used in the...
Wireless mesh networks have attracted great interest in the research community recently. Much effort has been devoted to maximizing the network performance using limited channel resources in a multichannel multiradio wireless mesh network. It is believed that the limited spectrum resource can be fully exploited by utilizing partially overlapping channels in addition to nonoverlapping channels in 802...
In this paper, we propose a new opportunistic multicast protocol to improve multicast throughput in Wireless Mesh Networks (WMN). It builds upon opportunistic routing (OR) strategies that have been designed to improve unicast throughput in wireless networks. The key concept in our multicast protocol is a tree backbone. Our tree backbone protocol represents a tradeoff between traditional structured...
IEEE 802.16 mesh mode is positioned to be used as a wireless backbone network. In coordinated distributed scheduling (C-DSCH), when nodes transmit control messages to compete for channel access, they need to wait for some period of time called hold-off time to compete again. Network performance is sharply affected by the hold-off mechanism in the bandwidth reservation procedure. In this paper, a new...
Multiple-Input Multiple-Output (MIMO) technology has great potential for improving the throughput of Wireless Mesh Networks (WMNs). In this paper, we investigate the joint stream allocation and scheduling problem for single-user MIMO communication in WMNs with the objective of maximizing the demand satisfaction for a set of flows. The notion of transmission configuration (TC) is introduced and a heuristic...
Even though channel assignment has been studied for years, most IEEE 802.11-based multi-hop wireless networks such as WSN, WMN, MANET are limited by channel interference. Properly assigning orthogonal channels to wireless links can improve the throughput of multi-hop network. To solve the dynamic channel assignment problem, a routing-based channel assignment algorithm R-CA is proposed. R-CA can allocate...
The IEEE 802.16 mesh network is a promising next generation wireless backbone network. Under Coordinated Distributed Scheduling (CDS) mode, setting the holdoff time for nodes is essential to achieving good performances of medium access control layer scheduling in the networks. In this paper, we propose a dynamic scheme for setting holdoff time in IEEE 802.16 mesh mode with CDS. This scheme allows...
Channel assignment schemes in Multi-Radio Wireless Mesh Networks (MR-WMNs) usually leave several links sharing the same channel within overlapped transmissions or interference ranges; this is especially true when only one radio is used or when the number of radios is very small compared to the number of orthogonal channels. In order to further improve MR-WMN performance, especially for mobile multimedia...
Efficient utilization of Multi Channel - Multi Radio (MC-MR) Wireless Mesh Networks (WMNs) can be achieved only by intelligent Channel Assignment (CA) and Link Scheduling (LS). Due to the dynamic nature of traffic demand in WMNs, the CA has to be reconfigured whenever traffic demand changes, in order to achieve maximum throughput in the network. The reconfiguration of CA requires channel switching...
Careful Channel Assignment (CA) and Link Scheduling (LS), tuned to the traffic demand in the network, are required to efficiently utilize Multi-Channel Multi-Radio (MC-MR) Wireless Mesh Networks (WMNs). In a dynamic network, where the traffic demand keeps changing with time, we need to reconfigure the CA and LS to suit to the changing demands. But, a change in CA leads to disruption of traffic resulting...
In order to improve network coverage and throughput at low cost, a mesh mode is defined in IEEE 802.16 standard recently. Although the standard defines the multiple access signaling mechanisms, it doesn't specify resource allocation issue. In this paper, we address the problem of resource allocation with the goal of achieving optimization network throughput in WiMax mesh networks. We first establish...
Wireless Mesh Networks are mainly used for providing last-mile broadband wireless access. It is then highly recommended to ensure fairness among different users regardless of their physical locations while increasing their throughput. In this paper, we construct weighted contention graphs for the calculation of maximal capacity per flow and then we search how to maintain fairness per aggregate source-destination...
An important problem in multi-radio multi-channel wireless mesh networks is how to perform efficient network-wide broadcasting. While route discovery or energy efficiency is the major concern for broadcasting in mobile ad-hoc networks or sensor networks, in WMNs, more attention should be paid to the high-throughput schemes. In this paper, we propose an interference-aware broadcast routing and channel...
As a new type of wireless network architecture, because of its self-organization, and support multi-hop and heterogeneous networks, Wireless Mesh networks has played an important role in building ldquowireless citiesrdquo and become an research spot in academia and industry. In practical applications, network capacity is the most important need and high network throughput is the most important network...
Mesh networks are characterized by the use of multiple channels and multiple interfaces to improve the system throughput. A multi-interface multi-channel wireless mesh network consists of a number of stationary or minimally mobile wireless routers, forming a multi-hop Internet backbone. Previous research has revealed that single channel IEEE 802.11 MAC protocols are not suitable for multihop network...
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