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.
Distributed Denial of Service (DDoS) attack continues to be one of the main vulnerabilities of today's Internet. Client's puzzle mechanism is a well-known solution against such threat, however with badly tuned puzzle sizes it may harm the clients in the peaceful time, as well as produce additional difficulties during an attack. Here, we introduce a novel algorithm — DISPUTE — auto-tunable distributed...
We present the design and evaluation of NPLA (Network Prefix Level Authentication), a system allowing source addresses to be validated within the network to the granularity of network prefix. Prefix routers use public key cryptography to insert NPLA headers in outgoing packets. En route entities holding the corresponding public key verify the source of a packet. NPLA provides deployment incentives...
Energy consumption caused by wireless transmission poses a big challenge to the battery lifetime of mobile devices. While the potential of using lossless compression for saving energy has been long acknowledged, no general solution has been proposed for applying lossless compression to energy adaptation for mobile services. We propose a proxy-based energy adaptation framework, in which the data to...
Home networks are an increasingly popular platforms for the deployment of ICT solutions for common people. Universal Plug-and-Play has enabled the seamless connection of different home appliances and the services they offer. However, interconnecting home networks, e.g. among friends, in a way that is flexible, easy to deploy and use, and yet well controllable still remains a challenge. This paper...
Prediction of wireless network conditions enables the reconfiguration of mobile applications in a varying network environment, which in turn might gain more energy savings and better quality of service. In this paper, we focus on the prediction of network signal strength and its potential of improving energy saving in network-based power adaptations. We evaluate the performance of three prediction...
Maximizing network throughput is one of the main objectives in wireless multi-hop networks. However, small link bandwidth and severe interference become two great obstacles in network throughput improvement. Single route always encounters great congestion, especially for multiple flows with the same source and destination. Multi-path routing can solve the bandwidth shortage issue to some extent, but...
The next generation communication systems will provide high quality multimedia services in a flexible and efficient manner. As an extension of next generation networks, Mobile Ad Hoc Networks (MANETs) have attracted significant attention amongst researchers. Nodes in a MANET have limited battery power. Hence, ad hoc routing protocols ought to be energy conservative to support real-time multimedia...
YouTube launched a customized Web site for mobile devices, which is gaining popularity among users. However, accessing multimedia based Internet services from mobile devices consumes energy, the most critical resource of handheld devices. The energy consumption of YouTube for mobile devices has not been widely studied. In this paper, we present a quantitative study of YouTube's energy consumption...
Service migration enables continuity of service experiences while changing devices, without terminating or disturbing the running sessions of the service. It has been proposed as an important application for emerging ubiquitous computing environments. This paper specifically studies service migration for voice over IP (VoIP) services by applying session initiation protocol (SIP) as the main method...
Third generation (3G) packet switched WCDMA networks with high-speed downlink packet access (HSPDA) are currently being deployed worldwide to provide wireless broadband connectivity. When introducing HSDPA in 3G networks the end user experience and system capacity with voice over IP applications improve considerably. When later on adding also high-speed packet uplink access (HSUPA), the system capacity...
Universal plug and play (UPnP) is a set of protocols for automatic service discovery in a local area network (LAN). UPnP is suitable for home networking environments, where consumers, e.g., can buy a new device, plug it into the network and the device automatically configures itself in order to access the resources of the network. UPnP can be used only in a single LAN because the UPnP protocols use...
Metropolitan wireless mesh networks are being deployed to provide broadband connectivity to city-wide hotspots. However, its commercial feasibility and business model have not yet proven successful. In particular, deploying large areas with good signal coverage is very difficult. The main problem is a result of the number of required nodes to cover an area with proper signal strength that can support...
HSDPA networks are intensively being deployed to provide mobile broadband connectivity to mobile devices. In addition to HSDPA, FLASH-OFDM is another wireless broadband option operating in a licensed spectrum. However, if operated at very low frequencies like the network in Finland,, it is particularly interesting for emerging markets, especially for rural areas which are lacking telecommunications...
Scalability and efficient global search in unstructured peer-to-peer overlays have been extensively studied in the literature. The global search comes at the expense of local interactions between peers. Most of the unstructured peer-to-peer overlays do not provide any performance guarantee. In this work we propose a novel Quality of Service enabled lookup for unstructured peer-to-peer overlays that...
Peer-to-peer (P2P) overlay networks are currently being used to build large scale distributed systems running various decentralized applications like distributed storage, content distribution, collaborative scheduling, and leader election. Although we have protocols like Byzantine agreement, voting schemes etc. for building resilient distributed applications; we have very few solutions available for...
Peer-to-peer (P2P) overlay networks are currently being used to build large scale distributed systems running various decentralized applications like distributed storage, content distribution, collaborative scheduling, and leader election. Although we have protocols like Byzantine agreement, voting schemes etc. for building resilient distributed applications; we have very few solutions available for...
Network information theory states that novel methods, such as, cooperative communication and relaying can increase the overall network transport capacity. These methods are not utilized in current networking technologies. The 3G RAN will not scale up to meet the requirements set for telecommunication in the next decade. We need a novel fourth generation (4G) RAN design. This paper analyses challenges...
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.