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Nowadays, mobile phones have prevailed in a great variety of applications, through which massive personal trajectories can be collected and analyzed to support many interesting location-based services. However, it is still challenging to efficiently store and retrieve this kind of spatio-temporal data, which has typical big-data feature with large size, streaming style and multiple data source. To...
The high dynamic of mobile peer-to-peer network makes the topology of network changing frequently, inconsistent of overlay network and bottom physical network topology, which can make worse network capability, higher failure rate of super-peer, longer query delay, lower effect of data transmission, as well as lower success rate of resource searching and system instability. This paper proposes a resource...
Mobile phone, as a kind of most commonly used vehicle of communication, keep records of every movements of each person. For each cell phone user, the different social attribute, leading to various mobility behaviors and social cliques, reflect on dissimilarity of their call behavior patterns. How to deduce the social attribute from the calling behavior is discussed in this paper, by estimated the...
Along with the development of wireless technology and especially 3Gpsilas throw into commercial, the mobile value-added services gradually popular used, such as mobile automatic question and answer (Q/A) system. But the current mobile Q/A system mainly based on FAQ database, the question and answer can not be validated and updated by itself. So this paper attempts to implement a p2p based model updatable...
According to 3G standard, the communicating bandwidth of mobile devices is 2Mbps, which makes it possible to realize 3G faced P2P e-commerce service among mobile devices. In this paper, the author mainly solved the problem of how to apply mobile P2P technology into modern e-commerce platform. Then, introduced the actuality of modern e-commerce in use and the system architecture of a 3G faced mobile...
Considering the high packet losses and low, varying bandwidth of GPRS/EDGE network and limited computation power of handheld devices, we present and implement a novel SVC video-on-demand system for hand-held devices over GPRS/EDGE network. For the purpose of handling varying bitrate, we propose a priority based layer switching (PLS) adaptation scheme for SVC stream, which not only performs online...
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