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In this paper, optimal content caching strategy is proposed to jointly minimize the cell average outage probability and fronthaul usage in cloud radio access network (Cloud-RAN). Closed form expression of the outage probability conditioned on the user's location is presented, and the cell average outage probability is obtained through the composite Simpson's integration. The caching strategy for jointly...
We present MAP, a contention-free MAC protocol for fast and reliable multi-hop data dissemination in vehicular ad hoc networks which takes advantage of two-packet collisions to improve network capacity. MAP addresses both the problem of unwanted collisions due to hidden nodes in CSMA/CA-based networks, and the problem of excessive control messages in dense TDMA-based vehicular networks. MAP operation...
This work describes a clean-slate inter-domain routing protocol designed to meet the needs of the future mobile Internet. In particular, we describe the edge-aware inter-domain routing (EIR) protocol which provides new abstractions of aggregated-nodes (aNodes) and virtual-links (vLinks) for expressing network topologies and edge network properties necessary to address next-generation mobility related...
Multi-vehicle operations using various types of unmanned vehicles (UVs) can increase efficiency of marine data acquisition, reduce the crew risk and lower mission costs. These types of missions are very complex and often involve systems that are not interoperable. From an operational perspective however, some level of integration is necessary. Typically, a common network system architecture and Situation...
High-speed railway (HSR) has witnessed a huge growth globally, and now is reaching a maximum speed of 575 km/h. This record of speed makes mobile communications difficult for HSR since the handover (HO) frequency increases which results in a high loss of connectivity. Based on distributed antenna systems (DASs), this paper utilizes the two-hop network architecture for HSR broadband wireless communication...
Inter-frequency scan (IFS) is a process performed by the user equipment (UE) to discover small cells in heterogeneous networks (HetNets) for high data rate and boosting the spectral efficiency. It is anticipated that the role of IFS will have a significant impact on the quality of service (QoS) and the energy efficiency in the future cellular systems. In this paper, a framework is presented to model...
Wireless communication by leveraging the use of low-altitude unmanned aerial vehicles (UAVs) has received significant interests recently due to its low-cost and flexibility in providing wireless connectivity in areas without infrastructure coverage. This paper studies a UAV-enabled mobile relaying system, where a high-mobility UAV is deployed to assist in the information transmission from a ground...
Recent development of wireless communication systems and standards is characterized by constant increase of allocated spectrum resources. Since lower frequency ranges cannot provide sufficient amount of bandwidth, new bands are allocated at higher frequencies, for which operators might resort to deploy more base stations to ensure the same coverage. Connecting increased number of base stations to...
This paper aims to track in real-time the position of a vehicle using GPS sensors, and transmit this position using available wireless technologies to a central monitoring system or to other vehicles. The goal is to improve the capabilities of drive-assisted cars by knowing in real-time the nearest traffic density, but without much increasing the communication and processing requirements of transmitters...
On functional requirements of atmospheric particle monitoring system, this paper designs a distributed atmospheric particle monitoring system. The proposed system consists of a data acquisition network, embedded gateways, a database server and remote monitoring terminals. The data acquisition network consists of mobile data acquisition nodes and router nodes distributed in monitoring areas which are...
Wireless networks can be categorized into infrastructure and infrastructure-less based on the network formation and architecture. Mobile Ad-hoc Networks are infrastructure-less networks with self-configuring property having a dynamic topology where nodes are free to move in any direction, due to this topological changes there are increased chances of link breaks in the network giving rise to path...
With the emergence of Internet shopping, the mall wilted in the face of fierce competition increasingly. So it should find a way of new technology for a change, in order to build a more sophisticated services. Indeed, Indoor Positioning technology is the key. A kind of positioning technology is use mobile phones and base stations to determine the location of the mobile. The holder's trajectory can...
The paper presents issues related to the cooperative transmission in wireless vehicular networks. Cooperative transmission involves the use of mobile terminals as relay stations to improve the transmission quality, improve network performance and reduce energy consumption. The paper presents the methods used to implement cooperative transmission and the types of cooperative networks.
Recent events of multiple earthquakes in Nepal, Italy and New Zealand resulting loss of life and resources bring our attention to the ever growing significance of disaster management, especially in the context of large scale nature disasters such as earthquake and Tsunami. In this paper, we focus on how disaster communication system can benefit from recent advances in wireless communication technologies...
Nowadays, smart meters play a primordial role in the Smart Grid (SG) in order to optimize electricity production, distribution as well as consumption. By exchanging more frequent information between the smart meter and Utility Provider (UP), SG will operate more efficiently with less loss. However, this frequent exchange poses a serious privacy issue which can invade individual privacy since the UP...
Heterogeneous cellular network has become an important network architecture to improve network spectral efficiency. This paper works on a theoretical framework for analyzing outage probability and spectral efficiency in a two-tier heterogeneous network with joint processing cooperation. The heterogeneous network consists of high power nodes (HPNs) and low power nodes (LPNs). A range expansion association...
In this paper, we study the average downlink rate in Ultra-Dense Networks (UDNs) considering the idle mode capability of the base stations (BSs). Wireless networks are densified by deploying a surplus of small cells in order to provide uniform coverage and high capacity. Consequently, the density of the small cells outpaces that of the active users in UDNs. Idle mode capability permits the idle BSs,...
Ultra dense networks and device-to-device communications are expected to play a major role in 5G networks to meet tremendous traffic requirements. In our work, we address traffic offloading in dense device-to-device cooperative heterogeneous networks with focus on use cases where a very large number of users request simultaneously common streaming content from a remote server with quality of service...
This paper investigates a dynamic bandwidth allocation strategy with secrecy constraints, where big data can be viewed as a resource instead of a burden from the traditional perspective. Unlike usual cases, we take into account big data and security issues along with bandwidth allocation. It is reasonable to assume that big data derived from mobile network, by a series of processing, can generate...
Several applications involving the utilization of Small Unmanned Aerial Vehicles (SUAVs) require stationary and long-term coverage of a target area. Unfortunately, this goal is hard to achieve due the need for coordination and the limited flight autonomy of the SUAVs. In this paper, we investigate how to guarantee persistent coverage of a target area through SUAVs by exploiting characteristics of...
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