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Real-time video services are usually delay sensitive and have strict constraints on the transmission reliability, which poses challenges to live video streaming over multi-hop wireless networks, since the unpredictable packet losses and network congestions caused by time-varying wireless channels greatly degrade the received video quality. To address this, in this paper, we propose a reinforcement...
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...
We consider the problem of throughput-optimal packet dissemination, in the presence of an arbitrary mix of unicast, broadcast, multicast and anycast traffic, in a general wireless network. We propose an online dynamic policy, called Universal Max-Weight (UMW), which solves the above problem efficiently. To the best of our knowledge, UMW is the first throughput-optimal algorithm of such versatility...
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...
This paper presents a multicast Delay Tolerant Network (DTN) routing protocol with the goal of maximizing an economic gain for Device-to-Device (D2D) commercial content dissemination. The defined economic gain is a composite routing performance index, which combines revenue from delivery, and forwarding cost from disseminating commercial content such as coupons. Majority of existing approaches, due...
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 increase in number of users in Wireless Mesh Networks (WMNs) setups consequently represents an upsurge in numbers of services. Services such as internet, e-commerce, audio streaming, Voice over Internet Protocol (VoIP), Video on Demand (VoD), file and printer sharing among others will be clogged and ran over WMNs. This further leads to poor Quality of Service (QoS). Quick and timely discovery...
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...
Recent studies suggest nodes in practical networks are more likely to communicate with nearby nodes than far away nodes, which is referred to as proximity preference. In this paper, we model proximity preference by assuming the probability of communication follows a power law distribution with respect to distance and analyze its influence on the throughput of a hybrid network. Moreover, L-maximum-hop...
Social connections among network users have been well investigated as an additional opportunity in network design, such as in routing strategies and trusted networking. This paper presents a paradigm shift that explores the design and performance analysis of combining social links jointly with communication links to support message delivery in wireless networks. In a combined social and communication...
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...
We consider a multihop wireless network with multiple users. The channels may experience fading. The power is consumed only during transmission and is a general monotonically increasing function of rate. We provide low complexity algorithms for joint routing, scheduling and power control which ensure stability of the queues, certain minimum rates and/or upper bound on the end-to-end, mean delays.
In recent years, by spread of wireless communication terminal, a demand for wireless networks which can use anywhere and anytime is increasing. In some of wireless networks, communication environments have became with long time communication delay and occurrence of link disconnection. It was not supposed in current communication networks. In such a worst communication environment, Delay / Disruption...
Wireless communication is currently the trend in industrial environments, reducing costs and allowing the creation of applications that were impossible with legacy technologies. In this respect, the WirelessHART specification is emerging as a standard solution. Despite the direct benefits, a WirelessHART network exhibits a series of technical (reliability, energy consumption, tolerance to failures,...
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...
The limited network resources can be utilized effectively through the network coding method in Intermittent Connectivity Wireless Networks, but the number of coding nodes should be dynamically adjusted according to network status. To effectively improve the network resources utilization, a dynamical coding method is proposed. According to the estimated results of current network status, the number...
One of the dominant approaches in coping with the intermittent connectivity of opportunistic networks is packet replication. However, the need for a distributed operation forces the nodes carrying a message copy to make replication decisions without taking into account the replication state of other nodes. This strategy can lead to the creation of an excessive number of replicas thus exhausting the...
Back-pressure algorithm for queueing network can lead to maximum network throughput and is robust to time-varying network conditions, which has raised considerable attention recently due to the scarcity of wireless bandwidth resources. However, it may result in large end-to-end (e2e) delay and a waste of network resources, particularly when the network loads are light or moderate. The reason is that...
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