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In wireless coded cache network, data contents are cached in a number of mobile devices using an erasure correcting code, and a user retrieves content from other mobile devices using device-to-device communication. In this paper, we consider the repair problem when multiple devices that cache data contents fail or leave the network. By exploiting the wireless broadcast nature, we formulate the repair...
4G Long Term Evolution (LTE) mobile system adopts Adaptive Modulation and Coding (AMC) as a link adaption mechanism that is based on the User Equipment (UE) periodically reporting channel condition summarised through Channel Quality Indicator (CQI) which, in turn, is based on Signal-to-Interference-plus-Noise Ratio (SINR) and Reference Signal Received Power (RSRP). Although CQI has a predominant role...
In this paper, a positioning system is designed based on the visible light communication (VLC) technology for the tracking of mobile target in the indoor environment. The practical received signal strength (RSS) can be measured for subsequent positioning algorithm by using the designed system. Based on the practical measurements, an empirical equation is proposed to estimate the target's distances...
Mobile cloud storage (MCS) is being extensively used nowadays toprovide data access services to various mobile platforms such assmart phones and tablets. For cross-platform mobile apps, MCS is afoundation for sharing and accessing user data as well as supportingseamless user experience in a mobile cloud computing environment. However, the mobile usage of smart phones or tablets is quite differentfrom...
Cloud storage services, such as Dropbox, iCloud Drive, Google Drive, and Microsoft OneDrive, have greatly facilitated users’ synchronizing files across heterogeneous devices. Among them, Dropbox-like services are particularly beneficial owing to the delta sync functionality that strives towards greater network-level efficiency. However, when delta sync trades computation overhead for network-traffic...
This paper describes a novel system that provides key parameters of HTTP Adaptive Streaming (HAS) sessions to the lower layers of the protocol stack. A non-intrusive traffic profiling solution is proposed that observes packet flows at the transmit queue of base stations, edge-routers, or gateways. By analyzing IP flows in real time, the presented scheme identifies different phases of an HAS session...
With the rapid proliferation of camera-equipped smart device, two dimensional barcode obtains the widespread application in daily life. Embeding URL information to a barcode becomes popular and convenient. There is increased interest in the use of color barcode to encode more information than regular black-and-white barcode. This paper presents CodeCube-a multi layer color barcode for mobile society...
Seamless connectivity plays a key role in realizing QoS-based delivery in mobile networks. However, current handover mechanisms hinder the ability to meet this target, due to the high ratio of handover failures, packet loss and service interruption. These challenges are further magnified in Heterogeneous Cellular Networks (HCN) such as Advanced Long Term Evolution (LTE-Advanced) and LTE in unlicensed...
Broadcasting data to multiple users is widely used in wireless applications. We consider a group of mobile users, within proximity of each other, who are interested in the same video content. Network coded broadcast and cooperative coded communication can improve transmission efficiency and throughput over wireless network separately. In this paper we consider the D2D-assisted wireless network coded...
Several atypical hierarchical routing protocols have been proposed among which grid-based routing protocols are an efficient way of disseminating data towards a mobile sink. The network is partitioned into a virtual equal-sized grids. The proposed protocol, Mode-Switched Grid-based Routing (MSGR) for Wireless Sensor Networks selects one node per grid as the Grid Head. The routing path to the sink...
We present a formal probabilistic framework for process learning to compose service specific overlays (SSO) in cloud networks. The approach provides a learning mechanism that relies on previous composition results to build service composition process models that can be adopted for future composition requests. The process is then translated into a workflow-net to provide guaranteed delivery of requested...
In this work, we propose an auction-based resource negotiation for flexible video traffic offloading over heterogeneous wireless networks. The goal of the proposed system is to alleviate long term evolution (LTE) traffic congestion by offloading video traffic through WiFi network in a flexible scale while providing stable video streaming services to users with the minimum monetary cost. The fountain...
Orthogonal Frequency Division Multiplexing, together with Multiple-Input Multiple-Output, is a pillar technique for new generation mobile networks, i.e., for the mobile networks in direction of 5G. Its crucial properties of robustness against fading and Inter-symbol Interference make it a great choice for the demanding data rates of future mobile networks. This paper presents a technique for additional...
Traditional way of learning programming is often tedious and fearsome to students, especially to kids. In most cases this results reluctance and uptake, while programming is the core of modern technology. Game is the signature of immersion. With its intense power of engaging players, it can wipe out the aversion and motivate students on coding. Here we have described a better way of learning programming...
We study the data reliability problem for a community of devices forming a mobile cloud storage system. We consider the application of regenerating codes for maintaining a file within a geographically-limited area. Such codes require lower bandwidth to regenerate lost data fragments compared to file replication or reconstruction. We investigate threshold-based repair strategies where data repair is...
We propose a framework for edge-facilitated wireless distributed computing, in which several mobile users connected to an access point collaborate for a distributed computing task. We characterize the minimum communication load, both in uplink (from users to the access point) and downlink (from access point to the users), required for distributed computing. In particular, we develop a communication...
In recent years, with the popularity of the running and other sports software, friend recommendation algorithm based on trajectory is gradually becoming a hot research. In this paper, the θ-ADBSCAN algorithm is used to dig the hot trail and the resident points of user's trajectory, then the trajectory segmentation algorithm is described, and the trajectory is replaced by the MTR which is composed...
Mobile Cloud Storage (MCS) systems – cloud storageon mobile devices without access to remote data center-type cloud resources, are not only interesting from a theoretical point of view, as they pose the most challenging design settings, but also important in enabling real-world applications such as disaster relief, military operation, and mining in remote areas. Central to MCS design is how to minimize...
In recent years, video streaming has contribute 40% traffic in LTE wireless networks. However, battery has been a bottleneck for user to enjoy the high quality video since the progress of battery technique is far less than the advancement of wireless technique. How to enable users to enjoy video streaming given limited battery is an urgent problem. In this paper, we propose a video transmission mechanism...
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