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The ever increasing demand for mobile devices especially smartphones poses newer challenges concerning data management in wireless environment. These devices have lot of constraints such as limited memory, small display size, battery power and intermittent wireless connectivity to the network. Data management and multimodal aspect of data needs to be addressed in such an environment. Caching is one...
Video streaming is one of the most popular internet services and generates a large percentage of the global network traffic. As major video-on-demand (VoD) service providers have seen their bandwidth costs increase, a shift towards peer-to-peer (P2P) architectures has been made. Indeed a number of recent research efforts have focused on offloading media server using P2P architectures, however the...
Immersion into rich multimedia is now the norm in today's Internet. Combining multiple streams of textual, audio and media data from a variety of sensors and sources, allow the presentation of a world that is almost “real”. Users equipped with portable and wearable devices can become consumers and contributors to an augmented reality. In this paper we describe a general software architecture for an...
This paper focus in an emerging concept called Elastic Personal Computing that is the ability to distribute data processing among multiple personal devices that constitute a mobile cloud. Among the most complex challenges is to provide data layer for the system to exchange input data transparently among nodes considering the data partitioning is application specific. Implementing data layers with...
The inefficiency of one-to-one matching of user requirements to a single service has given rise to service composition. Service composition allows simple services to be dynamically combined into more complex services. In mobile environments, service discovery and integration involves cooperation between various service nodes where reliance on a centralized service registry introduces efficiency and...
Nowadays, most popular social networking services adopt centralized architecture, in which continual Internet connectivity is prerequisite for each user to exploit those services, and centralized servers are used for storage and processing of all application/context data, even though mobile users are within proximity area (like campus, event spot, and community), and can directly exchange media through...
It has been a challenging task to deliver high-volume 3D multi-view media with spatial audio to users. The challenge stems from the availability of a large number of user equipment with different capabilities, range of viewing preferences, as well as diverse network characteristics. With the target of facilitating 3D media delivery to multiple users simultaneously and in a synchronised way with consistent...
A peer-to-peer (P2P) network is composed of several peers. All peers may analyze data and then take some activities collaborate. Thus, assuring all healthy peers can reach agreement become very important. In real world, both peers and the transmission between peers may be malfunction, and this will cause the overall system works incorrectly. Furthermore, peers have mobility, and that will increase...
Multimedia streaming applications have disruptively occupied bandwidth in wire line Internet, yet today's fledging mobile media streaming still poses many challenges in efficient content distribution due to the form of mobile devices. At the same time, cloud computing is gaining power as a promising technology to transform IT industry and many eminent enterprises are developing their own cloud infrastructures...
Timely operation guidance is currently achieved via web-based e-learning as an emerging tool of computer education. In this paper, we address the issue of timely operation guidance by integrating the advanced mobile learning technologies with the relevant pedagogic theories. Firstly, we discuss the limitations that general mobile learning may suffer from; then, we study the specific requirements both...
ISO TC 204 WG 16 is specifying an Intelligent Transportation Systems (ITS) communication architecture known as CALM for vehicle-vehicle and vehicle-infrastructure types of communications (V2X). The key concept is to support a variety of peer-to-peer communication scenarios between various ITS sub-systems (vehicle, roadside, center and personal), a variety of communication modes (one-to-one or one-to-many),...
Mobile P2P media streaming is a very interesting research topic. We design a real P2P system based mobile simulation measurement platform. Based on the captured traces of PPStream, four aspects are reported: protocol blackouts, unavailable data (UD), performance of data fetching and sharing, and neighbor stability. A simple model is presented to analyze the UD in handover. According to the model,...
This paper gives a theoretical approach to modeling and simulating the Grade of Service (GoS) of Voice over Peer-to-Peer Session Initiation Protocol system which is created based on various teletraffic parameters. VoP2P features a particular service characteristic due to its different GoS models originated from circuit switched telephone networks. Especially, most voice session in VoP2P is indirectly...
Peer-to-peer is emerging as a potentially disruptive technology for content distribution in the mobile Internet. In addition to the already well-known peer-to-peer file sharing, realtime peer-to-peer streaming is gaining popularity. This paper presents an effective real-time peer-to-peer streaming system for the mobile environment. The basis for the system is a scalable overlay network which groups...
Traditionally, media objects have been restrained to specific media containers (e.g. media players, libraries, and technological platforms). In this paper we argue that this is due to a tradition of treating media as content separated from, but physically aligned to a certain form. However, due to the digital character of modern media, and due to current developments towards file sharing communities,...
Lately there has been a growing interest in the use of peer-to-peer technologies for deploying large-scale live media streaming systems over the Internet. In this paper we give a brief survey on the peer-to-peer streaming field and have also a closer look on selected applications. In practice, we analyse the selected peer-to-peer streaming systems (Octoshape, SopCast, TVAnts and TVU networks) and...
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