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Item type:Publication, Access status: without files , DICE : a novel platform to support massively distributed clouds(Springer, 2013); ; ; ; © Institute for Computer Sciences, Social Informatics and Telecommunications Engineering 2013. Massively distributed clouds (MDC) have a huge potential in serving novel applications and services in many situations. Mainly, they are able to provide communication without the use of an infrastructure and to guarantee full data and user anonymity. However, their implementation is not trivial and requires innovation in many different fields, such as opportunistic communications, big data management and security. In this paper, we present our first design of a MDC supporting architecture, called DICE: Distributed Infrastructureless Cloud sErvices. We present our main application scenario and focus on implementation challenges and early results.Publicationtype: Conference Paper117 - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Access status: without files , Multipath transmission in content centric networking using a probabilistic ant-routing mechanism© Institute for Computer Sciences, Social Informatics and Telecommunications Engineering 2013. Content Centric Networking (CCN) is a new networking paradigm that names pieces of content rather than network nodes. It promises more efficient transmissions due to in-network caching and easier realization of mobile and multihomed devices. However, in order to leverage multipath transmission for multihomed devices, routing and forwarding mechanisms are needed that support this functionality. In this paper, we present a probabilistic ant-routing mechanism that enables multipath transmissions for CCN nodes. Using an OMNeT++ based simulation model, we show that our routing mechanism can support transmissions of data streams over multiple links to achieve higher throughput than any single link could provide.Publicationtype: Conference Paper87 - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Access status: without files , A novel machine-to-machine traffic multiplexing in LTE-A system using wireless in-band relaying(Springer, 2013); ; ; ; © Institute for Computer Sciences, Social Informatics and Telecommunications Engineering 2013. In Long Term Evolution Advanced (LTE-A) several new features have been added to deal with the ever-increasing demands for higher data rates and spectral efficiency. One of the key features that the Third Generation Partnership Project (3GPP) has introduced is the Relay Node (RN), a low power low cost device used to increase the spectral efficiency, especially at the cell edge. In this paper, we propose to use RNs to address a challenging new problem emerging on the horizon: the expected tsunami of Machine-to-Machine (M2M) traffic in cellular and mobile networks (in LTE, and LTE-A). By taking advantage of RN’s low cost, low power, and small size we outline the challenges of and one possible design for using RNs to integrate M2M traffic in LTE-A. To the best of our knowledge, this is a novel idea that has not yet been proposed and may give RNs more longevity and therefore greater value.Publicationtype: Conference Paper97 - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Access status: without files , Route-over forwarding techniques in a 6LoWPAN6LoWPAN plays a major role within the protocol stack for the future Internet of Things. Its fragmentation mechanism enables transport of IPv6 datagrams with the required minimum MTU of 1280 bytes over 802.15.4-based wireless sensor networks. With the envisioned goal of a fully standardized WSN protocol stack currently necessitating a routeover approach, i.e. routing at the IP-layer, there are two main choices for any 6LoWPAN implementation with regard to datagram fragmentation: Hop-by-hop assembly or a cross-layered direct mode, which forwards individual 6LoWPAN fragments before the whole datagram has arrived. In addition to these two straightforward approaches, we propose enhancements based on adaptive rate-restriction for the direct forwarding and a retry control for both modes to reduce the number of losses of larger datagrams. Our evaluation of the basic and enhanced forwarding modes within simulations and a hardware testbed indicate that the proposed enhancements can considerably improve packet reception rate and latency within 6LoWPAN networks.Publicationtype: Conference Paper42 - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Access status: without files , Network planning for stochastic traffic demands© Institute for Computer Sciences, Social Informatics and Telecommunications Engineering 2013. Traffic in communication networks is not constant but fluctuates heavily, which makes the network planning task very challenging. Overestimating the traffic volume results in an expensive solution, while underestimating it leads to a poor Quality of Service (QoS) in the network. In this paper, we propose a new approach to address the network planning problem under stochastic traffic demands. We first formulate the problem as a chance-constrained programming problem, in which the capacity constraints need to be satisfied in probabilistic sense. Since we do not assume a normal distribution for the traffic demands, the problem does not have deterministic equivalent and hence cannot be solved by the well-known techniques. A heuristic approach based on genetic algorithm is therefore proposed. The experiment results show that the proposed approach can significantly reduce the network costs compared to the peak-load-based approach, while still maintaining the robustness of the solution. This approach can be applied to different network types with different QoS requirements.Publicationtype: Conference Paper64