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As a class of narrow band structures such as dock, bridge and dam, chain-type networks are applied to monitor and track underwater targets. This paper proposes a coverage strategy for probabilistic positioning of mobile targets, which can balance the coverage and positioning performance of underwater sensor network. Based on careful analysis characteristic of network architectures, multiple relay...
Mobile cloud computing provides a cloud-based platform for executing mobile tasks remotely in the cloud. It becomes a promising way for extending the limited mobile resource as well as reducing the expensive mobile cost. In this paper, we consider a mobile application with multiple tasks, each with a certain amount of work and input/output data. Our objective is to minimize the mobile cost due to...
This paper investigates direct beamformer estimation in dynamic time division duplexing (TDD) system with the objective of weighted sum rate maximization. For a given TDD frame, base stations (BS) are allocated to either uplink or downlink based on the instantaneous traffic state. The weighted sum mean-squared error minimization framework is used to obtain the decentralized iterative solution for...
Caching at user devices is one promising solution to alleviate the heavy base station burden in mobile social networks. In this paper, we consider both physical coupling and social relationships among users, and then devise the optimal content placement scheme to maximize the offloading probability for mobile social networks. In particular, because the problem is NP-complete, we first propose a weighted...
Proactively pushing content to users has emerged as a promising way of coping with the explosively growing traffic demand of next-generation mobile networks. However, it is still unclear whether content pushing can improve the energy efficiency of hard delay-constrained communications over additive white Gaussian noise (AWGN) channels. With pushing, the energy consumption can be reduced by increasing...
Caching popular contents at mobile devices, assisted by device-to-device (D2D) communications, is considered as a promising technique for mobile content delivery. It can effectively reduce backhaul traffic and service cost, as well as improving the spectrum efficiency. However, due to the selfishness of mobile users, incentive mechanisms will be needed to motivate device caching. In this paper, we...
A Reconfigurable Radio Access Unit is presented and experimentally demonstrated. In the unit, an optical switching system is set to dynamically deliver different packets to different points in the network. The packets are transmitted wirelesslty on the Ka-band (26–40 GHz), achieving BER values below the limit for 7% of overhead. The proposed system can easily be implemented in a centralized radio...
Future fifth generation (5G) wireless network will be driven by the large volumes of mobile data traffic, especially from enormous Machine Type Communication(MTC) devices but just use limited spectrum resources. In this paper, our fundamental motivation is to use less wireless resource at the cost of larger but acceptable transmission latency for massive clustering MTC devices. From the two observations...
Deploying dense small cell networks overlaying to the conventional macro cell networks is widely regarded as a key step towards network architecture revolution for improved coverage and user rate. Small cells have different kinds, and a target coverage can be achieved through deploying different kinds of small cells. Previous works mainly focus their attention on the optimization of spectrum and energy...
The behavior that people change their cell phones is very important for phone manufactures and mobile operators to make commercial plans and competing strategies to attain maximum benefit. In this paper, we aim to evaluate four existing prediction models in phone changing events, based on user behavior data collected from one telecommunication operator. First we adopt the feature extraction algorithms...
Achieving high QoE for AR applications on a mobile device is challenging because the required advanced computer vision and machine learning algorithms are computationally intensive by nature. Hence, some task for AR applications must be offloaded to more powerful remote servers. Offloading for mobile applications remains an active area of research. In the context of mobile AR applications which requires...
In this poster, we investigate the problem of scheduling mobile chargers in roadside wireless rechargeable sensor network. Taking mobility constraints caused by city topological graph into consideration, we aim at optimizing the traveling path for chargers to minimize the traveling cost. erefore, the scheduling problem is converted into edge coverage problem, which is substantially dierent from the...
In this paper, we consider wireless caching in device-to-device (D2D) cooperative networks and propose a new definition,energy-consumption-ratio (ECR), to measure the energy efficiency that caching schemes can achieve. Based on this definition,we formulate an optimal energy-efficient caching problem and develop a caching scheme, named SBRC-2S. Simulation results show that the proposed scheme outperforms...
This paper presents ThinGs In a Fog (TGIF)- a system designed to support interdisciplinary research that fall under the broad context of the Internet of Things. The framework is based on an Edge Computing system design that distributes application processing to system compute nodes leveraging geographic compute location diversity of a Cloud-to-the-edge to support machine-to- machine interactions that...
Caching at the small base station (SBS) is apromising architecture to alleviate the highly-loaded wireless video networks. SBS can cache popular video files, thus serves mobile users without going through backhaul connection to the core network and provides content- level offloading. This paper proposes a novel method for the content caching problem that optimizes cache performance. Our proposed algorithm...
Massive Multiple-input Multiple-output (MIMO) adaption is one of the primary evolving objectives for the next generation high speed train (HST) communication system. In this paper, we consider how to design an efficient low-complexity location-aware beamforming for the multi-user (MU) massive MIMO system in HST scenario. We first put forward a lowcomplexity beamforming based on location information,...
Dynamic Adaptive Streaming over HTTP (DASH), as one of the main video transmission technologies, has been widely concerned. However, due to the unstability of wireless environment and the restrictions of mobile networks, it is challenging to deliver DASH-based videos in LTE systems and enhance the performance of Quality of Experience (QoE). In this paper, a problem is formulated to maximize the sum...
Mobile communications have evolved in a very rapid manner along with other fast-growing communication technologies. The widespread use of this technology has turned mobile communications into a life style. Thus the necessity for high quality and high capacity networks with thorough coverage has become one of the major demands. Many models have been proposed to cover the signal strength measurements...
Wireless sensor systems have been used in several innovative applications during past few years. However, the key constraints like system design, energy, cost are significantly application dependent. In this paper, we design a wireless sensor system towards an important environmental issue of water quality - Cyanobacterial Harmful Algal Blooms (CyanoHABs). We present a low-cost, low-energy and low-footprint...
This position paper presents a new approach to infrastructure sharing for mobile networks based on the idea that network resources, both at the wireless access and the core network, can be traded dynamically on a real-time market where virtual operators or tenants compete to obtain the resources to serve their users. The negotiation procedure can be automated by allowing tenants to define their policies,...
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