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Future Network and Mobile Summit, 2010

Date 16-18 June 2010

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Displaying Results 1 - 25 of 159
  • [Title page]

    Publication Year: 2010 , Page(s): 1
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    Freely Available from IEEE
  • [Copyright notice]

    Publication Year: 2010 , Page(s): 1
    Save to Project icon | PDF file iconPDF (22 KB)  
    Freely Available from IEEE
  • A game theoretical approach to the management of node clusters in DR-OSTC based MISO cooperative communications

    Publication Year: 2010 , Page(s): 1 - 8
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (167 KB) |  | HTML iconHTML  

    In this paper, the problem of node management in cooperative transmissions exploiting Distributed Randomized - Orthogonal Space Time Coding (DR-OSTC) schemes is tackled. In particular, resorting to game theory, a novel strategy able to manage node participation in a distributed cooperative link using a simple randomized coding rule is derived. The proposed solution guarantees the participation of a proper number of nodes to a virtual antenna array (hence avoiding an energy waste) without requiring any overhead for node management. View full abstract»

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  • Pricing-based resource allocation in ad-hoc networks using auction theory

    Publication Year: 2010 , Page(s): 1 - 8
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (481 KB) |  | HTML iconHTML  

    This paper adapts a novel dynamic multimedia resource allocation auction-based mechanism for wireless ad-hoc networks. In auction scheme, bidders bid the data which is stored on the server. In this paper, we are assuming that the bidder's bids are based on either a modified first or second-price sealed-bid auction mechanisms, which is accumulated throughout the repeated bidding process over time. The server allocates the data to the winner who values it the most. Both mechanisms have been investigated to prove that they yield to similar utilities in terms of bidders and seller's revenue and overall system efficiency. The simulation scenario focuses on a case where a server node has some data which is offering it for a group of wireless nodes. The server has different forms of multimedia data; graphics, audio and video, we assume that bidders have different interest in the offered data. Some nodes will value the graphics more than the audio, while others value the video more and so on. The introduced mechanism is repeated every time the data have successfully been delivered to the winner. The simulation results prove that the proposed auction mechanism dramatically increases the seller's revenue whether he decide to choose the first or second-price auction. Moreover, the results briefly evaluate the reliability of predefined route with respect to the data prices and source and destination cooperation for different network settings. View full abstract»

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  • Constrained resource allocation for OFDMA wireless mesh networks with limited feedback

    Publication Year: 2010 , Page(s): 1 - 8
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (137 KB) |  | HTML iconHTML  

    Adaptive resource allocation has been shown to provide performance gain for OFDMA wireless mesh networks (WMNs) with full channel state information (CSI) at mesh router (MR) and mesh clients (MCs). However, full CSI at MR is rarely possible due to limited feedback resource and feedback delay. In this paper, we present more practical resource allocation strategies for OFDMA WMNs where the MR has only limited channel information in terms of average channel gain or channel distribution information (CDI). The merits of the well known Lagrange dual approach and the Lambert-W function are combined to find the optimal allocation. By using the Lambert-W function, the optimal resource allocation is expressed in closed form and can quickly be determined without resorting to complex algorithms since a number of popular mathematical softwares, including Matlabs, contain the Lambert-W function as an optimization component. Simulation results are provided to compare the performance of the proposed schemes with other allocation schemes. View full abstract»

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  • Fault resilience in Next-Generation Networks

    Publication Year: 2010 , Page(s): 1 - 16
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (751 KB) |  | HTML iconHTML  

    Next-Generation Networks (NGNs) employ the Internet Protocol (IP) over a wide variety of packet-switching technologies, which often lack in really effective fault resilience enabling features. An overlay MPLS infrastructure with its fast-reroute mechanisms can be deployed to overcome such an issue. Addressing NGNs robust to single link and node failures, an off-line method to effectively calculate working and recovery paths for highly demanding services even in a point-to-multipoint scenario, is proposed and analyzed. The strength of our work is the ability to address two recovery techniques in a very simple and flexible manner, by formulating an Integer Linear Programming (ILP) problem, optimizing either the overall switching delay experienced by the user in case of failure or the bandwidth usage thanks to a shared protection, while limiting the recovery time to some tens of ms as in SONET/SDH networks. View full abstract»

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  • Towards a service ecology for pervasive networked environments

    Publication Year: 2010 , Page(s): 1 - 8
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (243 KB) |  | HTML iconHTML  

    Future, computation, storage and communication services will be highly pervasive: users' devices, smart objects, machines, platforms and the surrounding space will create a highly decentralized common pool of real and virtual resources interconnected by dynamic networks of networks. This trend, along with the evolutions of architecture of participations and “Everything As A Service” approach promoted by Cloud Computing, will enable the emergence of pervasive service ecosystems, where several Players cooperate to produce, combine and consume services. This evolution will yield a variety of challenges in both service delivery and service management, requiring solutions able to master complexity, dependability, and behavioural stability in complex and dynamic systems in the absence of a centralized control point. In this position paper, we introduce a novel decentralised architectural solution exploiting autonomic principles. The proposed architecture constitutes a new self-organized and self-managed service delivery environment enabling the creation and maintenance of pervasive service ecosystems. View full abstract»

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  • Spectrum Load Smoothing in IEEE 802.16 systems

    Publication Year: 2010 , Page(s): 1 - 9
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (252 KB) |  | HTML iconHTML  

    Today's framework for radio spectrum regulation and spectrum usage is undergoing fundamental changes. In the face of scarce radio resources, regulators, industry, and the research community are initiating promising approaches towards a more flexible spectrum usage, as for example cognitive radios for dynamic spectrum assignment. In this work an intelligent algorithms is presented which supports operation of IEEE 802.16 radio systems in a commonly used spectrum in a flexible manner. The concept namely Spectrum Load Smoothing (SLS) is a method for service- and technology-independent assignment of spectrum ranges under consideration of Quality of Service support. The concepts is based on the possibility to predict spectrum usage based on observations of past spectrum usage. We apply the SLS to a coordinated dynamic radio resource management problem. View full abstract»

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  • Self-optimized cognitive network of networks

    Publication Year: 2010 , Page(s): 1 - 8
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (147 KB) |  | HTML iconHTML  

    Future processing, storage and communication services will be highly pervasive: people, smart objects, machines and the surrounding space (all embedding devices such as with sensors, RFID tags, etc.) will define a highly decentralized cyber environment of resources interconnected by dynamic Networks of Networks. As communications will extend to cover any combination of “people, machines and things”, future networks will be increasingly complex and heterogeneous, yet always endorsed with the challenging task of ensuring end-to-end QoS. This paper proposes groundwork for an advanced cognitive networking paradigm exploitable in future wired and wireless infrastructures: a Decentralised Cognitive Plane to allow for cross-layer, cross-node and cross-network domain self-management, self-control and self-optimization, whilst being compatible with legacy management and control. View full abstract»

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  • Link group management for carrier-grade wireless mesh networks

    Publication Year: 2010 , Page(s): 1 - 10
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (330 KB) |  | HTML iconHTML  

    Their distributed nature makes mesh networks easy to deploy and robust against node and link failures. However, distributing functionality adds high signalling overhead and delays. Forming resource clusters in wireless mesh networks is a well-known concept to alleviate these issues. This article describes a link group system for carrier-grade wireless mesh networks that provides absolute QoS guarantees. In order to support heterogeneous wireless mesh networks, the system interface of this link group system is implemented as a technology independent interface. Performance evaluations show a good fairness without requiring per-flow queuing, a good overall system performance, and small packet delays in multi-hop setups, which makes these link groups an important component of carrier-grade wireless mesh networks. View full abstract»

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  • Bidirectional Gigabit transmission over a single SI-POF for home networking

    Publication Year: 2010 , Page(s): 1 - 7
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (202 KB) |  | HTML iconHTML  

    This paper reports on some recent results on transmission over large core plastic optical fibers (POF) developed in the EU project ALPHA, inside a Workpackage focused on physical layer solutions for home networking. In particular, we demonstrated a Gigabit Ethernet bidirectional transmission over a single POF running to distances up to 20 meters. We believe that the solution is attractive for very low cost consumer electronic short-distance cabling at high data rate requiring extremely simple installation and where small diameter cable is a must, as it happens in brown-field domotic installations that need to reuse existing power ducts. The solution proposed in this paper achieve Gigabit Ethernet bidirectional transmission over a cable that has 2.2 mm overall diameter (including protective coating), significantly outperforming in this respect UTP copper cable (Cat. 5 and above), which have a diameter of the order of 5 mm. We show in this paper experimental solutions running at 20 meters using standard binary On-Off keying at the transmitter and electronic equalization at the receiver. View full abstract»

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  • Justifying information security investments in web software: (Quantitative techno-business modeling approach)

    Publication Year: 2010 , Page(s): 1 - 13
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (218 KB) |  | HTML iconHTML  

    Security of services and platforms is a vital and complex aspect, which requires significant investments. We use a techno-business modeling (TBM) approach for analysis of service platform security, aiming at justifying the information security investments during the life-cycle of a web software platform. Techno-business environment influences the above-mentioned models and scenarios. It is analyzed by drivers and driver-based scenarios. The TBM had to be extended for security analyses. We have added the set of security drivers and scenarios, in order to model the effect of misuse cases (triggered by security breaches). After simulation of security breaches and misuse cases, their influence on the rest of the environmental drivers (and the TBM models and scenarios) is calculated. Quantitative analysis (value and cash flow based valuation) captured both the short-term and the long-term effects of the misuse cases. We demonstrate our modeling approach on the proof-of-the-concept case: web software solution for service delivery to social network sites. View full abstract»

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  • Architectures for low-cost Gbit/s POF links for home networking

    Publication Year: 2010 , Page(s): 1 - 7
    Cited by:  Papers (1)
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (124 KB) |  | HTML iconHTML  

    This paper reports on the recent results of the EU project “POF-PLUS”, financed in the EU VII Framework Program and started on the 1st of May 2009. This project is fully focused on innovative transmission and component solutions for high speed links based on large core plastic optical fibers (POF). Two main applications are the target of POF-PLUS: next generation high-speed home networking solutions, with primary focus on 1Gbps POF transmission over a 40-50 meters target distance, and low-cost optical interconnects in large data centres and storage area networks running at multi-Gbps. This paper focuses on the first of the two tasks (1Gbps POF transmission over 40-50 meters) and reports the technical status of the research in POF-PLUS after 18 months from its beginning. We give a detailed proposal for solutions based on binary modulation at the transmitter and two different types of electronic equalization at the receivers. We present the two architectures, showing their pros and cons, and some recent experimental results. View full abstract»

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  • Subsystems for future access networks

    Publication Year: 2010 , Page(s): 1 - 8
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (510 KB) |  | HTML iconHTML  

    Current evolution and tendencies of Telecom Networks in general and more specifically optical Metro and Access Networks and their convergence are reported. Based on this evolution, a set of research lines are foreseen regarding subsystems and devices as: high speed optical sources, modulators and receivers, for the next generation of Passive Optical Networks. The ICT project EURO-FOS is achieving European level cooperative research among academia and industry, enabling future telecommunication networks. View full abstract»

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  • An autonomic hierarchical mobility management framework for 3GPP heterogeneous networks

    Publication Year: 2010 , Page(s): 1 - 8
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (213 KB) |  | HTML iconHTML  

    The evolution of the 3rd Generation Partnership Project (3GPP) network is expected to increase network performance and quality with reduced operational costs and complexity. It becomes critical to provide seamless mobility support in such heterogeneous access networks. In this article we examine the existing mechanisms and protocols and exploit the autonomic features based on the current specifications and the ongoing discussions within 3GPP. An autonomic hierarchical mobility management framework is proposed in order to improve the inter-system mobility support in 3GPP heterogeneous networks. Furthermore, the extension to Proxy Mobile IPv6 for performance enhancement is introduced and evaluated through simulations, which can provide fast handover support with reduced handover latency. View full abstract»

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  • Vision and architecture supporting wireless GBit/sec/km2 capacity density deployments

    Publication Year: 2010 , Page(s): 1 - 7
    Cited by:  Papers (5)
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (404 KB) |  | HTML iconHTML  

    An IMT-Advanced key requirement for next generation systems is the support for unprecedentedly high throughput per user. This implies an infrastructure-composed of access and backhaul network-capable of supporting the resulting extremely high capacity densities. The current next-generation technologies LTE and WiMAX support a mere 100Mbps/km2 in economical cellular deployment. This is insufficient, in particular in dense urban areas where the market demand for wireless broadband access is the highest, thereby seriously jeopardising the wide scale uptake of IMT-Advanced technologies. BuNGee's (Beyond Next Generation Mobile Broadband, FP7-ICT-2009-4-248267) goal is thus to dramatically improve the overall infrastructure capacity density of the mobile network by an order of magnitude (10×) to an ambitious goal of 1Gbps/km2 in economical cellular deployment-thereby removing the barrier to beyond next-generation networks deployment. To achieve this objective, the project will target a set of breakthroughs such as exploring an unprecedented joint design of access and backhaul over licensed and license exempt spectrum; propose unconventional below-rooftop backbone solutions exploiting natural radio isolation; develop beyond next-generation networked and distributed MIMO and interference mitigation techniques and thus an entire protocol suite facilitating autonomous ultra-high capacity deployment. View full abstract»

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  • Mobility-Aware Distributed Embedding (MADE) of virtual networks

    Publication Year: 2010 , Page(s): 1 - 8
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (159 KB) |  | HTML iconHTML  

    Network virtualisation has been recently presented as a mean to overcome the saturation of the current Internet by sharing the same infrastructure by different network operators. The efficient embedding of Virtual Networks in the physical substrate represents one of the main challenges associated to this technique, since it is necessary to set up a coordinated procedure to provide the requested set of resources in the most beneficial way. We propose a novel embedding protocol, designed in a distributed manner, and especially focused on solving the problems derived from the dynamicity of the nodes in mobile environments. Our Mobility-Aware Distributed Embedding (MADE) protocol applies the well known Path Splitting and Migration techniques in order to optimize the use of the physical resources. A simulation-based study lets us show the efficiency of our protocol and the good results in terms of acceptance and finalization of Virtual Networks. View full abstract»

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  • STRONGEST: Challenges for network architectures

    Publication Year: 2010 , Page(s): 1 - 8
    Cited by:  Papers (1)
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (223 KB) |  | HTML iconHTML  

    Internet traffic has been growing quickly for many years and this growth will continue in the future (despite temporarily adverse economic conditions) requiring enhanced network technologies. Also to cope with this evolution, the cost of today's network solutions is still too high. In addition, in line with the EC goal of reducing the overall emissions, energy efficiency should be widely improved, primarily using whenever possible optics instead of electronics where only bit transport is required. Moreover, due to the unpredictable traffic increase, flexible bandwidth management has to be used instead of fixed allocated bandwidth. For these reasons, the key requirements for innovative ultra-high bandwidth networks refer to scalability, flexibility, assurance of end-to-end quality of service and energy efficiency, beside reduction of total cost of ownership. In the data plane, current equipment and network architectures still provide limited scalability, are not cost-effective and do not properly guarantee end-to-end quality of service. In the control plane, the open issue is to define an end-to-end control structure that allows different technologies and domains to inter-work efficiently, incorporating virtualization of network resources. View full abstract»

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  • Adaptive modulation induced WDM impairment reduction in optical OFDM PONs

    Publication Year: 2010 , Page(s): 1 - 12
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (192 KB) |  | HTML iconHTML  

    The transmission performance of multi-channel adaptively modulated optical OFDM (AMOOFDM) signals is numerically investigated, for the first time, in optical amplification- and chromatic dispersion compensation-free, intensity-modulation and direct-detection systems incorporating directly modulated DFB lasers (DMLs). It is shown that adaptive modulation not only reduces significantly the nonlinear WDM impairments induced by the effects of cross-phase modulation and four-wave mixing, but also compensates effectively for the DML-induced frequency chirp effect. In comparison with identical modulation, adaptive modulation improves the maximum achievable signal transmission capacity of a central channel by a factor of 1.3 and 3.6 for 40km and 80km SMFs, respectively, with corresponding dynamic input optical power ranges being extended by approximately 5dB. In addition, adaptive modulation also enables cross-channel complementary modulation format mapping, leading to an improved transmission capacity of the entire WDM system. View full abstract»

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  • Simple adaptively modulated optical OFDM modems using subcarrier modulation with input/output reconfigurability

    Publication Year: 2010 , Page(s): 1 - 8
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (205 KB) |  | HTML iconHTML  

    Three novel designs of adaptively modulated optical orthogonal frequency division multiplexing modems using subcarrier modulation (AMOOFDM-SCM) are proposed, for the first time, each of which requires a single IFFT/FFT operation. These designs has a number of salient advantages including a significantly simplified modem configuration due to the involvement of a single IFFT/FFT operation, input/output reconfigurability, dynamic bandwidth allocation capability, cost reduction and system flexibility and performance robustness to variations in transmission link conditions. Investigations show that these three modems are capable of supporting >;60Gb/s AMOOFDM-SCM signal transmission over 20km, 40km and 60km single-mode fibre-based intensity modulation and direct detection transmission links without optical amplification and chromatic dispersion compensation. View full abstract»

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  • RF impairments of vector modulators in wireless MIMO receivers

    Publication Year: 2010 , Page(s): 1 - 8
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (148 KB) |  | HTML iconHTML  

    Multiple-input multiple-output (MIMO) systems enable significant improvements for the wireless links in communication networks. If parts of the spatial signal processing of these multiple antennas are executed in the analogue RF front-end, power consumption, system size and costs of the system are minimised but key benefits of MIMO can still be exploited. However, analogue RF circuits are affected by impairments. These effects are analysed and modelled for a direct down-conversion receiver using maximum ratio combining (MRC) in the RF front-end. The errors arising from silicon integration are modelled and their effect on the wireless communication system is analysed. It is shown that technology impairments of RF spatial signal processing do not limit the wireless link performance with respect to the received signal-to-noise-ratio (SNR) and the bit error rates (BER) in practical cases. View full abstract»

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  • Resource sharing in wireless networks: The SAPHYRE approach

    Publication Year: 2010 , Page(s): 1 - 8
    Cited by:  Papers (2)
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (297 KB) |  | HTML iconHTML  

    Physical resource sharing between wireless operators and service providers is necessary in order to support efficient, competitive, and innovative wireless communication markets. By sharing resources, such as spectrum or infrastructure, which are usually exclusively allocated interference is created on the physical layer. Therefore, the economic gains, regulatory overhead, and engineering efforts need to be addressed by a consolidated cross-layer approach. This paper describes briefly the approach taken by the EU FP7 project SAPHYRE. View full abstract»

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  • Analytical approach for performance evaluation of QPSK system with optical coherent receiver and digital signal processing

    Publication Year: 2010 , Page(s): 1 - 8
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (228 KB) |  | HTML iconHTML  

    The Bit-Error-Ratio (BER) floor caused by the laser phase noise in the optical fibre communication system with quadrature phase shift keying (QPSK) and coherent detection followed by digital signal processing (DSP) is analytically evaluated. An in-phase and quadrature (I&Q) receiver with a carrier phase recovery using DSP is considered. The carrier phase recovery is based on a phase estimation of a finite sum (block) of the signal samples raised to the power of four and the phase unwrapping at transitions between blocks. It is demonstrated that errors generated at block transitions cause the dominating contribution to the system BER (floor) when the impact of the additive noise is negligibly small in comparison with the effect of the laser phase noise. Even the BER floor in the case when the phase unwrapping is omitted is analytically derived and applied to emphasize the crucial importance of this signal processing operation. The analytical results are verified by full Monte Carlo simulations. Based on the achieved analytical results the laser linewidth tolerance of the system is calculated. View full abstract»

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  • Boosting mobility performance with Multi-Path TCP

    Publication Year: 2010 , Page(s): 1 - 8
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (138 KB) |  | HTML iconHTML  

    Fourth Generation mobile devices incorporate multiple interfaces with diverse access technologies. The current Mobile IP protocol fails to support the enhanced fault tolerance capabilities that are enabled by the availability of multiple interfaces. In particular, established Mobile IP communications cannot be preserved through outages affecting the Home Address. In this paper we describe an architecture for mobile host multihoming that enables transport layer survivability through multiple failure modes. The proposed approach relies on the cooperation between Mobile IP and Multi-Path TCP and aims to fully support multihoming and extend roaming capabilities of mobile devices. View full abstract»

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  • Configuration of network resources for Future Internet application services

    Publication Year: 2010 , Page(s): 1 - 8
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (225 KB) |  | HTML iconHTML  

    This paper describes a possible approach to provide application-awareness capabilities to the transport network infrastructures of the Future Internet. This is achieved by introducing a signalling scheme enabling the application to automatically negotiate with the network the transport resources they require. The signalling workflow is detailed and the scalability of the proposed solution is evaluated through an experimental test-bed. View full abstract»

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