The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
Because of the feature of hybrid wireless mesh network, hybrid routing protocol is the most proper routing protocol for this kind of network. Hybrid routing protocol is composed of proactive routing protocol and reactive routing protocol. The proactive one is adaptive for static mesh routers, and the reactive one is suitable for mobile mesh clients. Existing hybrid routing protocols all neglect the...
In this paper, we present preliminary results from a performance comparison between the two multicast routing protocols ODMRP and SMF. While SMF uses a proactive selection of forwarding nodes, ODMRP is a reactive approach to multicast routing. For the evaluation, we use an two-step approach. First, we perform emulation-based measurements in a virtualized test bed utilizing the ns-3 IEEE 802.11 model...
A Mobile Wireless Mesh Network (MWMN) has found its progress and interest in current research. Recently AMWMN has been proposed, which appears to be a promising technology. Owing to the advantages of AMWMN, we analyze the performance of AMWMN with the three protocols Ad hoc On-Demand Distance Vector (AODV) routing, Destination Sequenced Distance Vector (DSDV) routing and Dynamic Source Routing (DSR)...
The flexibility of Wireless Mesh Network (WMN) architecture has made it easier for the delivery of video streams over such networks. However, delivering video streams over WMNs increases workload on the mesh nodes, increases bandwidth usage due to dedicated streams and limits scalability. These challenges are overcome by using WMNs with Dynamic Stream Merging Capability (DSM) [1]. DSM is a communication...
Most of the proposed works in Routing protocol for hybrid wireless mesh networks are based on AODV. To be more effective in hybrid wireless mesh networks, the enhancement of AODV is very much important. In this paper, we propose a novel mechanism for route discovery and route repairing by exploiting local connectivity. In this approach, any neighbor node of the destination node can provide a route...
Wireless Mesh Networks (WMNs) consist of static router backbone which provide connectivity and coverage to mobile clients. They can also be viewed as a special case of wireless multi-hop Mobile Ad-hoc Networks (MANETs). The IETF group as well as the IEEE 802.11s working group have recommended applicability of several existing MANETs routing protocols for WMNs. However, in WMNs, client to client communications...
In this paper, we propose a novel on-demand routing protocol for IEEE 802.15.4-based low rate wireless mesh networks (LRWMNs). The novelty of our work is that the proposed routing algorithms enable route discovery packets (RREQs) to be semi-directionally flooded with respect to a source-destination pair in a distributed manner without either physical or virtual location systems. Instead, we use the...
Routing protocols for mesh and ad-hoc networks are designed under the assumption that the underlying channel is unreliable and nodes may be mobile. Therefore, route failure detection and recovery are important components of the design. However, under high traffic scenarios, an aggressive route failure detection technique may create a chain of routing messages which interfere with the data communication...
Vehicular Ad-Hoc Network (VANET) has been one of the most transforming technologies for Intelligent Transportation Systems (ITS) in recent years. In particular, wireless mesh network is widely used for VANETs due to its scalability, flexibility, and low maintenance cost. When a mesh node fails, one can simply replace it with a new mesh node, and the network automatically reconfigures itself. However,...
The mobility is an important research topic in wireless sensor network. This paper presents an improved strategy of SPEED protocol for the requirement of node mobility in Wireless Mesh Sensor Network.
The main reason for packet loss in Wireless Mesh Networks (WMNs) is due to congestion. Presently, routing in WMNs is not congestion-adaptive. Routing may let a congestion happen which is detected by congestion control. The way in which the congestion is handled results in longer delay and more packet loss and requires significant overhead if a new route is needed. Hence, we propose a congestion adaptive...
This paper considers a realistic mobility model for a military application scenario using a wireless mesh sensor network. Within this model, the sink moves at the network boundary joining and leaving the network for different periods of time. Although the IEEE 802.15.5 standard has portability support for peripheral nodes (leaf devices) and is officially recommended for use in wireless mesh sensor...
In dynamic wireless networks, effective modeling on link behavior would lead the network protocol design towards a predictive and reasonable way. Emerging mobile ad hoc network (MANET), however, is of self-organizing and infrastructureless paradigm, where topology dynamics are highly related to many complicated parameters, such as node density, mobility model, and transmission range etc, which make...
Considering the instability of link quality, a new routing algorithm for WMN, namely ASA, based on Ant Colony Optimization algorithm(ACO) and simulated annealing algorithm(SA) was presented. This algorithm not only combined the adaptation, robustness and distributed, decentralized merit of ACO but also used SA to remedy the weakness of ant algorithm and increase the convergence rate of ACO. Simulation...
Video transmission over ad hoc networks is more challenging than over other wireless networks. The wireless links in an ad hoc network are not very error resilient and can go down frequently because of node mobility, interference, channel fading, and the lack of infrastructure. Moreover, typical video applications may need a higher bandwidth and higher reliability connection than that provided by...
Wireless mesh networks (WMNs) are attractive as a new communication paradigm. Ad hoc routing protocols for WMNs are classified into: (a) proactive, (b) reactive, and (c) hybrid approaches. In general, proactive routing is more suitable for a stationary network, while reactive routing is better for a mobile network with a high mobility. In many applications, a node in WMN is mobile but it can fluctuate...
Wireless Mesh Networks (WMN) provide a flexible and inexpensive way to expand network applications to mobile entities. However, high communication reliability demands can not be met by regular WMNs due to mobility and inherent properties of wireless communication. Failing links are common events which impose a major challenge for providing a dependable communication service. By the use of suitable...
In this paper, we present a proxy mobile IP based layer-3 handover scheme for mobile WiMAX based wireless mesh networks. Mobile WiMAX provides two types of layer-3 handover schemes: MIP based handover and PMIP based handover. MIP based handover incures the long handover latency because mobile nodes generate a lot of handover messages in wireless area. On the other hand, PMIP based handover decreases...
A Mobile Ad-Hoc Network (MANET) is a popular type of wireless network that is formed by a collection of mobile nodes. Each node in such network has the capability to communicate with its neighbors and non-neighbors through a wireless medium without using any existing network infrastructure. Due to the lack of infrastructure, all nodes in Ad-Hoc network are designed to act as an end system and a router...
After analyzing GPSR under traffic scenarios, we find its poor performance dues to extremely uneven distribution of vehicles. Considering the characteristics of the traffic scenario, we propose Improved GPSR using an electronic map. The simulation results show that Improved GPSR performs better than GPSR on Packet Delivery Ratio. Furthermore, we study the effect of stations switching on Packet Delivery...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.