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The natural disasters affecting railway are characterized by universality, frequency and variety in china. These events can suddenly cause a greater negative impact on the order of rail transport organizations in a short time. The abnormal circumstances of network node or network range will pose a threat to the safety and efficiency of rail transport. On the basis of analyzing the causes of the problem...
We consider a mobile-CDN system where base stations (BSs) are equipped with storage for replicating and distributing content. In such a system, BSs cooperation in replying user requests is a widely adopted mechanism. For such cooperative caching, a key issue is the joint optimization of content placement and request redirection, which has been intensively investigated in the literature. However, optimizing...
In cellular networks, tail states are designed for a tradeoff between energy efficiency and latency. However, the energy consumed during tail states becomes a huge energy drainer itself. Traditional energy saving techniques by content prefetching cannot be directly applied to mobile ads, due to the deadline requirements of ads, randomness in user behaviors, different usage patterns of mobile apps...
In this paper, we jointly consider communication, caching and computation in a multi-user cache-assisted mobile edge computing (MEC) system, consisting of one base station (BS) of caching and computing capabilities and multiple users with computation-intensive and latency-sensitive applications. We propose a joint caching and offloading mechanism which involves task uploading and executing for tasks...
To alleviate the pressure brought by the explosion of mobile video traffic on present cellular networks, small cell base stations (SBS) with caching ability are introduced. In this paper, we consider the caching strategy using network coding for mobile users over heterogeneous wireless network containing SBSs. We formulate an integer programming problem to minimize the average number of packets downloaded...
In this paper, we propose a cooperative contract approach to study the optimal energy-communication resource sharing for mobile cloud computing between energy-poor mobile devices and data-poor mobile devices. Specifically, an energy-poor mobile device with an energy harvesting module harvests energy from a data-poor mobile device through power splitting policy. In reciprocity, the energy-poor device...
Proactive caching is a promising technology in 5G wireless networks. Small-cell base stations (SBS) can cache popular contents to assist the macro base station, and proactive caching are considered to cope with the weak backhaul links of SBSs. However, obtaining popular contents and making the optimal caching strategy may be challenging. In this paper, a novel learning-based approach is proposed,...
Recently, computation offloading has become one of the common and efficient ways to minimize the energy expenditure. Considering the aspects of mobile-cloud communication, energy optimization is from the necessities of this offloading. Moreover, the variable and mobile states of mobile devices environments have a significance on this communication. In this article, we are going to suggest an adaptable...
With the maturity of the self-driving car technology, the self-driving car advertising platform will provide the excellent capability of precision personalized advertising recommendation, and bring great changes to current advertising modes. By proposing the model and the system architecture of the future self-driving car advertising platform, this paper design the scheduling algorithm and dynamic...
An algorithm, Travelling Salesperson Problem for Data Collection (TSP-DC), is presented which can plan tours for collected data from sensor nodes using a mobile sink. This is the first work which can deal with multiple different data ranges and data loads for each sensor node. Linear programming is used to schedule data transmissions to different nodes to reduce the overall tour time. Simulation results...
Mobile crowd sensing emerges as a new paradigm which takes advantage of the pervasive sensor-embedded smartphones to collect data efficiently. Many incentive mechanisms for mobile crowd sensing have been proposed. However, none of them takes into consideration the cooperative compatibility of users for multiple cooperative tasks. In this paper, we design truthful incentive mechanisms to minimize the...
The widespread use of mobile devices has led to the continuous innovation of information service technology. This paper analyzes the problems of service implementation in the absence of infrastructure, and proposes a service optimization solution in wireless mobile network environment, which is designed from three levels of service deployment service framework and service optimization, and effectively...
Anticipatory networking is a recent branch of network optimization that exploits contextual information to improve resource allocation decisions based on prediction. While some anticipatory networking concepts have been proposed in the literature, understanding of the potential real-world gains is so far very limited. Future mobile networks will likely integrate such mechanisms, and thus it is of...
Functionality of software products often does not match user needs and expectations. The closed set-up of systems and information is replaced by wide access to data of users and competitor products. This shift offers completely new opportunities to approach requirements elicitation and subsequent planning of software functionality. This is, in particular true for app store markets. App stores are...
This paper presents a low cost mobile application (app) integrated on an Internet of Things (IoT) ecosystem, which uses varied sensor information collected by mobile devices to track and assist on the logistics of urban goods distribution processes. The proposed approach is leveraged by the trend of decreasing costs for mobile data communication in urban environments. Taking into account basic sensor...
The convergence of mobile communication networks based on technologies mainly like UMTS, LTE, WLAN and WiMAX referred to as Next Generation Networks (NGN) results in a heterogeneous environment. NGN enlarges the number of the network points of attachment (PoA) with overlapping coverage, which increases the actuality of the network selection problem. At the same time, the variety of mobile multimedia...
In wireless sensor networks, nodes are power-limited, hence, we need to save the energy of nodes to guarantee the operations of the network. In this paper, the energy consumption of nodes in the process of node location estimation is reduced by allocating the transmission power of the anchors. Based on the mathematical model of Direction of Arrival (DoA) estimation error variance as a function of...
To fully exploit the increasingly dense deployments of mobile base station (BS) infrastructure, this paper proposes a novel caching paradigm called explicit caching, which stores selective contents at BSs and exposes such contents to users for volunteer browsing and download. We formulate the explicit caching problem as a joint content recommendation and delivery problem, which aims to maximize the...
This paperwork proposes a more economical and efficient Local Public Transport (LPT) transit routes for Rome. Optimization of public transit will result in greater capacity and efficiency for transit users. This proposal is based on real data of the public transit network of Rome, elaborated by an Ant Colony System (ACS) algorithm. The source information has been obtained via recorded phone data of...
The mobile C-arm can be used for 2D and 3D X-ray imaging. The motion of 3D X-ray scanning may result in vibration of the C-arm, which will probably affect the image quality. It is very necessary to study the relationship between the vibration characteristics of the C-arm and scanning motion. In the paper, we made modal analysis of the mobile C-arm based on Solidworks, and obtain the initial 6 order...
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