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Development of wireless network technology to support various types of information services continues to increase especially in video streaming services. Video transmission especially in Mobile Ad Hoc Network (MANET) environment used in this research, particularly in the Combined Scalable Video Coding (CSVC) scheme which is a development of H.264 / MPEG-4. The contribution of this research focuses...
Wireless Mesh Networks (WMNs) are gaining popularity due to the features provided, especially the low cost and self-configuration ability. In WMNs, the data traffic is transmitted through intermediate nodes and a number of packets are dropped during the transmission due to various reasons. One significant reason is the limitation of network resources such as bandwidth and buffer size. Because of these...
This paper is concerned with the design of routing protocol capable of congestion mitigation for drone-cells communication networks where drone-cells remain stationary in the sky as relays. All of the (distance or hop-count based) existing routing protocols can perform well when the network is lightly loaded. Once the network is heavily loaded, a large number of packets might be backlogged in queues...
The nature of the different types of end-to-end mobile devices in wireless networks where congestion is one of the biggest challenge is been addressed. This paper proposes a congestion aware routing strategy based on an evaluation of the weight value as a link index. The evaluation link cost considers the evaluation of the buffer delay, data rate, the MAC overhead and link quality. This approach uses...
The choice of a suitable path for packet transmission represents a fundamental issue to any routing protocol. The principle of choosing the shortest path is also no longer a good option for route selection since many other aspects may influence communication performance. In that sense, the link quality of the path is more important than the length of the path in a wireless network because of the unstable...
To design any wireless network, routing and protocol selection are of important consideration. In Mobile Adhoc Networks (MANET), routing protocols should have best throughput with minimum delay. So the performance in critical situations is the main concern of mobile networks. In this paper, wireless network of mobile nodes has been designed with defined parameters and the relative analysis is carried...
Previously, the distributed coding aware routing (DCAR) mechanism was proposed as a network coding aware routing protocol. However, DCAR is inefficient in handling realtime multimedia flows because it prefers nodes with longer queues in determining routes so that network coding opportunities can be increased. We propose a distributed coding-aware routing protocol that can maximize throughput and minimize...
Wireless mesh networks (WMNs) can be considered as a key technology for next-generation wireless networking. However, field trials and experiments prove that the performance of WMNs still below expectations. Therefore, several challenging research issues need to be determined. The routing protocol is one of the important factors to be improved to be robust, scalable, secured and efficient. This paper...
Through real-world measurements we evaluate the impact of multihop-aware cooperative relaying on end-to-end route performance in wireless multi-hop networks. In an experiment with 50 devices in an industrial environment cooperative relaying increases the end-to-end transmission reliability for multi-hop links to nearly 100% while reducing the average packet delay. We suggest how to include relay selection...
In the new millennium there has been a proliferation of mobile devices which include the likes of personal digital assistances (PDAs), laptops and smart phones. These mobile devices have a high market penetration rate even in the developing world. When two or more mobile devices within a radio communication range are able to communicate with each other a mobile ad hoc network (MANET) is formed. These...
MANET or mobile adhoc network is that network which is infrastructure less and does not need any centralized support. In this network, mobile nodes are equipped with CSMA/CA (carrier sense multiple access with collision avoidance) transceivers and communicate with each other via radio. This network is a kind of temporary network and is best suited for emergency purposes. Since, nodes are always on...
Internet is the major source of information today and its usage is increasing at an alarming rate. A wide variety of data travels over the Internet to cater the needs of end users. This has eventually led to heavy congestion in the network which in turn, worsens the user perceived latency. Internet routers are the main agents that detect congestion prior to end hosts. Traditional router incorporates...
The multi-interface multi-channel (MIMC) technique is used for the appropriate utilization of WMNs as backbone network. Switching delays and distribution of routes plays an important factor in multi-channel networks. The shortest route in a multi-channel network might include multiple channel-switching's which would cause further delay in transmission than a longer route which requires much lesser...
Mobile ad hoc networks contain mobile wireless devices that autonomously organize their infrastructure. Its performance depends on the worth of various parameters, like variety of nodes and mobile connections. Multi-path routing permits building and use of multiple paths for routing between a source-destination combine. It exploits the resource redundancy and variety within the underlying network...
Ad hoc wireless networks were considered to be the most suitable wireless communication system in order to support various applications in mobility environments. When providing real-time applications in ad hoc wireless networks, there are some requirements: i) the design of routing algorithm with packet delivery reliability while maintaining the established route for an arbitrary length of time (i...
In Mobile Ad hoc Network (MANET) [1], packet loss rate is high because of frequent changes in the network topology and the lossy nature of radio links. In this context, it is very delicate, for reactive routing protocols, to support multimedia communication. Route request process, as well as route breakage notification, is frequently repeated. This contributes to congestion and degradation of communication...
In a resource constrained wireless sensor network (WSN), communication tasks can be expensive in terms of power consumption. Thus, when good communication is required, a mechanism that can maximize the chances of a successful transmission of information via wireless network is very desirable. The Opportunistic Routing (OR) protocol has been proposed as an alternative and efficient method for exploiting...
We study the delay and throughput in a wireless multihop network with sources that form a Poisson point process and relays which are placed equidistantly on the source-destination line. A combined TDMA/ALOHA MAC protocol with intra-route TDMA and inter-route ALOHA is employed. We give bounds on the delay-optimal number of hops and derive the asymptotic delay-throughput tradeoff as the source-destination...
Current data collection protocols for wireless sensor networks are mostly based on quasi-static minimum-cost routing trees. We consider an alternative, highly-agile approach called backpressure routing, in which routing and forwarding decisions are made on a per-packet basis. Although there is a considerable theoretical literature on backpressure routing, it has not been implemented on practical systems...
Some recent studies have shown that cooperative cache can improve the system performance in wireless P2P networks such as ad hoc networks and mesh networks. However, all these studies are at a very high level, leaving many design and implementation issues unanswered. In this paper, we present our design and implementation of cooperative cache in wireless P2P networks. We propose a novel asymmetric...
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