Optimal Configuration of Services in Network Function Virtualization

  • Abhinanadan Sridhara Rao Prasad
  • Arjona Aroca J.
  • David Koll
  • Hilt V.
  • Omana Iglesias J.
  • Xiaoming Fu

Network Function Virtualization (NFV) helps to deploy the functionality of expensive and unflexible hardware appliances as scalable resources on commodity servers. However, optimal resource provisioning for non-trivial NFV services is still an open problem. While there have been efforts to answer the questions of when to provision additional resources in ...

Discovery Hub: exploratory search on remote linked data sources

  • Marie N.
  • Ribiere M.
  • Rodio F.

Exploratory search systems are built specifically to help the users during cognitive consuming search tasks like learning or topic investigation. The richness of the linked data datasets, their formal semantics and their connected nature can significantly help in this context. In this paper, we present a method to perform exploratory ...

Coordinated Multi-Point Operation for LTE (CoMP): Techniques, architectures and performance

  • Sehier P.

Coordinated Multi-Point Operation for LTE (CoMP): Techniques, architectures and performance

Layer Transmission for Cooperative Communication with Asymmetric Relay Channels

  • Han F.
  • Jiang Q.
  • Meng Y.
  • Shen G.

In downlink relay system, the conventional straightforward relaying scheme named decode-and-forward (DF) protocol is used at relay station (RS) to decode the data received from the base station (BS) and forward the decoded data to the mobile station (MS) to improve the spatial diversity gain. It is not spectrum efficient ...

An Evolution of Load Balancing Strategies in Co-Channel HetNets: Dynamic eICIC to Multi-Streaming

  • Pupala R.
  • Vasudevan S.
  • Venkatesan S.

Range extension of pico cells facilitated by muting of macro cells has been the main load balancing strategy for LTE co-channel HetNets and standardized under the moniker of enhanced Inter-cell Interference Co-ordination (eICIC) in 3GPP. In order to adapt to varying load due to user mobility or traffic activity, both ...

SDN programmability theoretical and standardization aspects

  • Papadimitriou D.
  • Sales B.

SDN research directions as outlined in IRTF RG [1] outlines i) The need for more flexibility and programmability at the data plane level and ii) The need for higher-level languages for programming together with testing and debugging. There are three fundamental challenges behind these directions (assuming that local function or ...

Enabling Data Offload and Proximity Services Using Device to Device Communication over Licensed Cellular Spectrum with Infrastructure Contol

  • K S.
  • Sivanesan K.
  • Vasudevan S.
  • Zou J.

The viability of device to device(D2D) communication on uplink resources as also the benefits accruing from network control over such communication, on licensed spectrum, are quite well understood today. We investigate the merits of a particular system instantiation based on these two tenets. The challenge of scheduling communication between two ...

Performance analysis for device-to-device communications with optimal power control

  • Cai L.
  • Liu Y.
  • Yang K.

Power control is an effective method to guarantee the resource sharing between cellular and D2D links for D2D (device-to-device) communications. In this work, we study the power optimization to maximize the sum rate of all coexistent links. We explicitly put priority for cellular link to guarantee QoS (quality of service) ...

Field Trial of Downlink CoMP with OTA Reciprocity Calibration for TD-LTE-Advanced System

  • Cai L.
  • Li D.
  • Wan Y.

Coordinated Multi Point (CoMP) technology has been considered as a promising means to mitigate inter-cell interference and has great potential to significantly improve the system capacity as well as the spectral efficiency for cell-edge users. TDD system like TD-LTE-Advanced is especially suitable for downlink CoMP operation because accurate channel state ...

Energy Efficiency of Mobile Networks, Earth / GreenTouch

  • Barth U.

Key results from the Earth project. Framework for Energy Efficiency Evaluation of nationwide wireless networks. GreenTouch GreenMeter study.

Confidential Domains of Execution

  • Cherubini D.
  • Cucinotta T.
  • Jul E.

Data Confidentiality or Cloud Computing? A true dilemma worthy of Hamlet and a reality for users aiming to exploit computational services in the cloud. Sensitive data can be protected by encryption, but if any computation is to be performed in the cloud, then the decryption key must be available somewhere ...

Performance of Asymmetric QPSK Modulation for Multi-Level ACK/NACK in LTE Uplink

  • Bonomo M.
  • Braun V.
  • Doetsch U.
  • Vangelista L.
  • Zimaliev A.

Asymmetric modulation schemes are candidates for conveying quality feedback in the form of multi-level ACK/NACK in a system employing reliability-based HARQ. Asymmetric QPSK (A-QPSK) modulation, for example, enables to convey one ACK level and three NACK levels with unequal error protection of the ACK and NACK levels, each NACK level ...

Demonstration of an SOA-assisted Open Metro-Access Infrastructure for Heterogeneous Services

  • Becker Jens
  • Bonk R.
  • Freude W.
  • Fritzsche D.
  • Haslach C.
  • Karnick D.
  • Kuebart W.
  • Meyer J.
  • Pfeiffer T.
  • Poehlmann W.
  • Schmuck H.
  • Weis E.

Abstract An open converged metro-access network approach allows for sharing optical layer resources like fibers and optical spectrum among different services and operators. We demonstrated experimentally the feasibility of such a concept by the simultaneous operation of multiple services showing different modulation formats and multiplexing techniques. Flexible access nodes are ...

Link Level Performance Assessment of Reliability-Based HARQ Schemes in LTE

  • Braun V.
  • Dekorsy A.
  • Doetsch U.
  • Woltering M.
  • Wuebben D.

This paper discusses two approaches of adapting the size of Hybrid-ARQ (HARQ) retransmissions in a 3rd Generation Partnership Project (3GPP) Long Term Evolution (LTE) uplink system. One goal of communication systems is to achieve a reliable transmission with a minimum utilization of the channel. In case of a decoding error ...

Field trial demonstration of open shared metro-access infrastructure

  • Bonk R.
  • Pfeiffer T.
  • Poehlmann W.
  • Schmuck H.

An open access network approach allows for sharing optical layer resources like fibers and optical spectrum among different services and operators at the same time. In a field trial the feasibility of such a concept has been demonstrated. Flexible access nodes are implemented including amplification and dispersion management to generate ...

5GNOW: Alcatel-Lucent Bell Labs Germany Concepts and Results Contribution for Future Network and Mobile Summit 2013

  • Chen Y.
  • Schaich F.
  • Ten Brink S.
  • Wild T.

The 5GNOW approach is able to efficiently support different traffic types, which all have to be part of future wireless cellular systems. Our vision of a unified frame structure concept aims at handling the large set of requirements within a single 5G system. A filtered multicarrier approach will enable the ...

Block-Filtered Multi-carrier Technique for Wireless Systems Beyond LTE

  • Frigon J.
  • Schaich F.
  • Ten Brink S.
  • Vakilian V.
  • Wild T.

In this paper, we propose a novel multi-carrier transmission scheme as an alternative approach to orthogonal frequency division multiplexing (OFDM) in order to mitigate intercarrier interference (ICI). In the proposed scheme called block-filtered multi-carrier (BFMC), a filtering operation applied to a group of consecutive subcarriers in order to reduce the ...

Energy Reduction Strategies in Elastic Optical Networks based on Traffic Aware Distributed GMPLS Control Plane

  • Morea A.
  • Verchere D.

The daily, weekly, and yearly traffic variations and traffic growth as well as energy efficiency strategies based on elastic optical networks, sleep mode and grooming strategies represent a good environment for achieving significant energy savings. We adapt the resources assigned for an optical channel by using a GMPLS distributed control ...

Graph Anonymization using Machine Learning, presentation for AINA 2014

  • Ludovic Denoyer
  • Maag M.
  • Patrick Gallinari

Presentation for the paper "Graph Anonymization using Machine Learning" accepted to the conference AINA 2014.