The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
Mobile applications are becoming increasingly computation-intensive, while the computing capability of portable mobile devices is limited. A powerful way to reduce the completion time of an application in a mobile device is to offload its tasks to nearby cloudlets, which consist of clusters of computers. Although there is a significant body of research in mobile cloudlet offloading technology, there...
In the large-scale Wireless Metropolitan Area Network (WMAN) consisting of many wireless Access Points (APs),choosing the appropriate position to place cloudlet is very important for reducing the user's access delay. For service provider, it isalways very costly to deployment cloudlets. How many cloudletsshould be placed in a WMAN and how much resource eachcloudlet should have is very important for...
Theoretical values of throughput and latency parameters of 3G as well as 4G mobile networks are generally known from the standards. However, in praxis they depend on various aspects like radio signal coverage, number of connected users or moving speed of the terminal equipment. In this paper we present results of measurements conducted in Vienna, Austria. They were conducted for activities of AEROCEPTOR...
Advancement in evolution of Internet technologies like 3G, 4G, and 5G, there is a need of good quality of service (QoS) for such wireless networks. Faster responses are required for various queries raised by mobile terminals (MTs) from any mobile computing environment. There has been many research works proposed in the past to address the QoS issue by using an Invalidation Report (IR)-based cache...
Offloading is a technique that utilises the powerful computation resource of Clouds by migrating heavy computations from thin clients like mobile devices to a remote server. Although task completion in the cloud is usually fast, an unreliable network connection often causes delays or interruptions which level the advantages of powerful resources off. Restart is an efficient method that can under certain...
The ever increasing traffic demand becomes a serious concern of mobile network operators. To solve this traffic explosion problem, there have been many efforts to offload the traffic from cellular links to direct communications among users. In this paper, we propose the framework of Traffic Offloading assisted by Social network services (SNS) via opportunistic Sharing in mobile social networks, TOSS,...
Video delivery to mobile users is one of the largest challenges that network operators face today. In this work we consider a heterogeneous cellular network with storage capable small-cell base stations, and study this problem for pre-stored video files that can be encoded with two different schemes, namely versions or layers, in various qualities. We introduce a framework for the joint derivation...
Video telephony is increasingly being adopted by end consumers. It is extremely challenging to deliver video calls over wireless networks. In this paper, we conduct a measurement study on three popular mobile video call applications: Face-Time, Google Plus Hangout, and Skype, over both WiFi and Cellular links. We study the following questions: 1) how they encode/decode video in realtime under tight...
Power management mechanism in Long Term Evolution (LTE) networks depends on the interval and position of the short Discontinuous Reception (DRX) period, long DRX period and ON duration of DRX. The proposal made in this paper is twofold. First, the sleep duration and periods are computed based on the minimum delay and power requirements of the User Equipment (UE). These values are usually kept as fixed...
In mobile wireless networks such as ad-hoc networks, sensor networks and mesh networks, wireless multihop transmission is adopted for data message transmission. For achieving higher throughput and shorter transmission delay, TDMA is one of more effective methods which avoid collisions and contentions than CSMA/CA and RTS/CTS. This paper proposes a reactive TDMA time slot assignment method in which...
In a mobile ad-hoc network, network topology changes dynamically due to mobility of computers, battery consumption and failure of mobile computers. Until now, many ad- hoc routing protocol tolerating such changes of network topology have been proposed. Here, all data messages are forwarded by all mobile computers included in a message transmission route detected by an ad-hoc routing protocol. No intermediate...
A Web-based remote control system of a mobile manipulator over Internet is studied. Due to the development of Internet technique and speed increase of transmission, the inexpensive convenient communication approach is provided for the remote control system. However, time delay on Internet is considered as a problem which affects the stability of teleoperation system. Therefore, based on the test and...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.