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This paper adapts a novel dynamic multimedia resource allocation auction-based mechanism for wireless ad-hoc networks. In auction scheme, bidders bid the data which is stored on the server. In this paper, we are assuming that the bidder's bids are based on either a modified first or second-price sealed-bid auction mechanisms, which is accumulated throughout the repeated bidding process over time....
Ad hoc networks have characteristics such as flexibility, fast and easy deployment, robustness which make them an interesting technology for various applications. Ad hoc networks are considered as the most promising terminal networks in future mobile communications. Providing sufficient bandwidth for multimedia applications in ad hoc networks is an urgent task because of the rising popularity of multimedia...
The following topics are dealt with: mobile ad hoc networks; mobility analysis, simulation, measurement and performance evaluation; WiMAX; wireless sensor network security; NGN architectures; multimedia protocols; biometric security and; information hiding.
After decades of wired communication, the wireless communication has replaced them in the recent past. Due to the large bandwidth of wireless communication, it is used for multimedia applications. The wireless multimedia network has gained tremendous importance in recent years due to its wide applications. It is unreliable because of network parameter constraints such as bandwidth, buffer, delay,...
To support the quality of service in wireless multimedia communications, wireless systems should work well in typical wireless environments characterized by the path loss of the signals, multipath fading, interference to adjacent channels, and random errors. A variety of researches in the application-layer have been proposed to adapt the video encoder to the link quality by compressing the data with...
This paper presents experiments on the performance and the viability of the AODV protocol (Ad hoc On-demand Distance Vector protocol) in multi-hop ad hoc networks, for use with multimedia traffic. This type of traffic presents some particular characteristics which make it difficult for AODV to serve fluently and reliably. After this experimental study of the problems that may arise in this type of...
TCP, the facto standard used in today's Internet, has been found to perform poorly in Mobile Ad Hoc Networks (MANETs). This is exacerbated by contention with increasing UDP-based high priority multimedia traffic and the class differentiation introduced in current QoS protocols, which results into TCP starvation and increased spurious timeouts. In this paper, we propose a cross-layer TCP enhancement...
At present mobile devices are prevalent with end users and continuous media streaming services in mobile ad-hoc networks (MANETs) support popular applications. One of the requirements for applications that stream isochronous media is that the network link has to be continuously available. In this study, we introduce two group-server scheduling schemes to improve link continuity: static group-server...
Since the multi-rate enhancements have been implemented in wireless ad hoc networks (MANETs), QoS-constrained multicast protocols for multimedia communication should be adapted to exploit them fully for using more efficiently the limited resources. To build a multicast tree with delay-guaranteed, one-hop delay and end-to-end delay must be known. The one-hop delay is the transmission time at a given...
Power dissipation is a crucial issue for integrating more than billions transistors on a chip. At the same time, reduction in energy consumption will be an essential subject to build future networking environment evolutionarily. This research project proposed in this paper is aiming at developing a data-driven networking system by which the coming networking environment can be realized with ultra-low-power...
Wireless multimedia sensor networks are widely used in the information acquiring and processing. Potential applications of multimedia sensor networks span a wide spectrum from military to industrial, from commercial to environmental monitoring. These applications may demand high bandwidth and are extremely delay-sensitive. Multipath routing is one of appropriate solutions for multimedia data transmitting...
Ad hoc networks are mobile nodes, where each node communicates over wireless channels, moves freely and may join and leave the network at any time. This feature may cause problems for higher layers when it unexpectedly exits lower layer in the protocol stack. In this paper, we determine from two algorithms. Firstly, if data is lost at network layer, the sender detects new networks without doing the...
Tremendous efforts have been conferred towards the congestion control concern in mobile wireless networks while dealing with maximizing both throughput and fair bandwidth allocation. Unfortunately, this is made limited by the variable and unpredictable behaviour of such networks. In this paper we propose a new congestion control mechanism for multimedia traffic in mobile wireless networks. Our proposed...
Focus of this paper is on an integration framework between UMTS (Universal Mobile Telecommunications System) and mobile ad-hoc networks (MANET), specifically designed to increase the effectiveness of cellular systems in supporting multicast transmissions. The aim is to overcome the scalability constrains of cellular network by enriching it through multihop communications. To the purpose of reducing...
With the explosive growth of the Internet and dramatic increase in wireless access, there is a tremendous demand on multimedia delivery over wireless networks. We give recent advances about wireless video transmission and discuss the recent development.
The following topics are dealt with: telecommunication security; link layer; wireless sensor network; wireless LAN; multimedia communication; medium access control protocols; quality of service; mobile ad hoc network; routing protocols; cross-layer optimisation; mobility management (mobile radio); and node placement strategies.
Delay tolerant networks (DTNs) use a store-carry-forward communication model relying on the mobility of nodes because a persistent end-to-end path from source to destination generally does not exist. Being different from ad hoc, recent research in DTN is still in its infancy which mainly uses analytical model and simulation to analyze network protocols. As we all know, testbed is an important research...
The present work focuses on emulation and validation of protocol stacks for MANETs (mobile ad-hoc networks) that must support multimedia applications in a tactical environment. We considered a network consisting of some tens of mobile nodes, with randomly variable speeds in the order of some tens of km/h. Nodes are deployed on a scenario of a few km2 and have a radio range of some hundreds of meters...
We study traffic routing in wireless mesh networks, where most of the nodes are fixed and few of them are mobile. We assume real-time multimedia stream communications between a fixed server and mobile nodes. In particular, through simulation we investigate the performance of the BATMAN protocol and compare it against that of some of the most representative schemes for routing in ad hoc and mesh networks...
With the fast development of information technology, the application environment and multimedia services in ad hoc networks, all of these are needed to support QoS. High-efficient and reasonable MAC protocol is the key point to provide QoS support in the network. In this paper, we analyze some typical QoS MAC protocols, and propose an adaptive QoS MAC protocol-AQMP, which is based on IEEE802.11 protocol...
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