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Unmanned aerial vehicles have some characteristics such as strong flexibility and lower costs that are suitable for capturing information in special scenarios and environments. Collaborative working of multi-UAV system is an important performance metric for mobile computing in wireless networks. Ant Colony Algorithm is a dynamic path selecting optimization algorithm and it can be used in multi-UAV...
With the rapid development of mobile games, power consumption and battery life of mobile platforms become a crucial problem, therefore, saving power for display which consumes a lot of power without decreasing the user experience becomes necessary. Content-centric techniques are most commonly used to save display power. However, they cannot be applied to closed-source games as they need to modify...
This paper considers a problem of user and access point associations in heterogeneous wireless networks consisting of multiple radio access technologies. We propose a strategy for optimizing the problem that aims at maximizing the total minimal utility of users in the longer term. The minimal utilities can be obtained from bare essentials of the quality of experience and defined by considering different...
The unforeseen mobile data explosion poses a major challenge to the performance of today's cellular networks, and cellular network is in urgent need of original solutions to handle such voluminous mobile data. Obviously, data offloading through third-party WiFi access points (APs) can effectively alleviate the issue of overload in the cellular networks with a low operational and capital expenditure...
The ad-hoc mobile markets are increasing daily with providers and consumers ready to participate in these markets. Issues like service discovery and selection are major challenges in these markets. As these markets grow, researchers are working on discovery while little is done on selection. Most scholars have developed different selection mechanisms considering only consumer's quality of service...
The past decade has witnessed immense developments in the field of network computing thanks to the rise of the cloud computing paradigm, which enables shared access to a wealth of computing and storage resources without needing to own them. While cloud computing facilitates on-demand deployment, mobility and collaboration of services, mechanisms for enforcing security and performance constraints when...
In Multimedia network applications, adaptive mobile streaming empowers cloud-based real time transcoding. The researchers in media cloud propose a well-organized technique to split the video content into different frames. The technique is to carry out disseminated encoding to resolve the multimedia data conversion problem. Also, it introduces an energetic outgoing and an extrapolative bandwidth for...
In a mobile crowd sensing system, a smartphone undertakes many different sensing tasks that demand data from various sensors. In this paper, we consider the problem of scheduling different sensing tasks assigned to a smartphone with the objective of minimizing sensing energy consumption while ensuring Quality of SenSing (QoSS). First, we consider a simple case in which each sensing task only requests...
With the rapid growth of mobile data traffic, operators are expected to densely deploy base stations to meet user demands. Recent researches have indicated that the densely deployed base stations lead to the significant increase of the operational expenses of operators due to the electricity bills to maintain their operation, and thus the profit of operators is greatly decreased. Different from the...
Due to the very nature of modern day Smartphone's and tablets, users of such devices will often travel from an area with strong mobile signal to a weaker area. Travelling from a Strong Signal Area (SSA) to a Weak Signal Area (WSA) causes a significant drop in the mobile network bandwidth available to the device. This causes Quality of Service (QoS) problems for video streams over mobile networks....
The introduction of femtocells brings more interference to cellular system, setting threshold to femtocell users' transmit power can control it effectively. To control the interference from femtocell users to macro base station and guarantee the QOS and maximize system capacity, this paper develops the uplink power control algorithm of femtocell system based on threshold and water- filling theorem...
To provide live streaming service to mobile users, traditionally each user pulls content from a server over his cellular network. In order to overcome the scalability problem of last-hop bandwidth bottleneck, mobile peer-to-peer (P2P) streaming can be used where mobile devices relay their stream received in a multi-hop manner by means of a secondary channel (such as Wi-Fi or bluetooth). We investigate...
This paper deals with load management in flexible industrial networks, characterized by a hybrid wired/wireless architecture and mobile wireless nodes. Our target scenario is an industrial network, in which data is exchanged between sensors and actuators running on the wireless side and a wired automation network. As many unpredictable elements affect the performance of wireless data transmission,...
Much work has been done on routing in Ad-Hoc networks, but the proposed routing solutions only deal with the best effort data traffic. Connections with Quality of Service (QoS) requirements, such as voice channels with delay and bandwidth constraints, are not supported. The QoS routing has been receiving increasingly intensive attention, but searching for the shortest path with many metrics is an...
In this article, we are interested in improving the handover quality of Host Identity Protocol (HIP) in the case of micro mobility by (i) proposing the Local Rendezvous Server architecture as a first attempt to minimize the handover delay in the mobility process, (ii) introducing an adaptive early update mechanism to improve the handover quality during mobility by introducing early HIP (eHIP) and...
A wireless resource scheduling problem is formulated in the context of IPTV multicasting streaming services over WiMAX channels. The goal is to maximize quality of services, in terms of number of subscribers served, number of IPTV channels carried, and video qualities of individual channels; subject to constraints of finite amount of multicast channel capacities as well as time and spatially varying...
In NGCN, mobile users can move between heterogeneous networks. In this kind of environment, handoff management is the essential issue that supports the handoff of users between various wireless technologies. Handoff decision, one of the handoff management issues consists of finding the appropriate time to perform the handoff and which cell to hand over in cellular networks. Traditionally, the need...
Tree-based backbone establishment and maintenance in mobile ad hoc - delay tolerant networks is often operated through the use of traversing tokens. A study and framework are proposed here for various token traversal strategies on tree-based backbones. The proposed strategies execute in a distributed and purely decentralized manner, and require only 1-hop knowledge. Aiming at providing the highest...
The topology control for guaranteeing QoS requirements of nodes might not have any solution because of the limited resources of nodes, e.g., the maximum transmitting power. In this case, the mobility of nodes can compensate for the shortage of resources and then makes a topology feasible. We propose the energy efficient mobility control algorithms for the QoS topology control with the least movement...
In this paper, we propose an algorithm for joint adaptation of transmission power and contention window to improve the performance of vehicular network in a cross layer approach. The high mobility of vehicles in vehicular communication results in the change in topology of the Vehicular Ad-hoc Network (VANET) dynamically, and the communication link between two vehicles might remain active only for...
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