Nonlinear Frequency Division Multiplexed Transmissions with 64QAM

  • Buelow H.
  • Thai Le S.

Record data rate of 50 Gb/s in nonlinear frequency division multiplexing (NFDM) transmission is experimentally demonstrated using 64 overlapping orthogonal 0.5 Gbaud channels with 64 QAM format, showing an improvement of 1 dB over conventional system at 976 km

Traffic management in SDN-enabled optical packet switching intra-datacenter network

  • Dallaglio M.
  • Dupas A.
  • Dutisseuil E.
  • Mardoyan H.
  • Pointurier Y.
  • Tolosa J.
  • Uscumlic B.
  • Van Q.

Slotted optical packet switching (OPS) is foreseen as future technology for intra datacenter network that will have to provide dynamic reconfiguration capacity, scalability, low latency and QoS guarantees to support fast growing emerging services. In this paper, we describe a prototype based on this technology and reconfigurable thanks to implementation ...

Topology-aware task placement in small-world optical data center network

  • Guo H.
  • Wang C.
  • Wu J.
  • Zhang D.

Based on the small-world optical data center network architecture, we propose a topology-aw are task placement scheme. Simulation results verified that it can effectively shorten the completion time of computing tasks' data transfer.

A refactoring approach for optimizing mobile networks

  • Bujari A.
  • Flinck H.
  • Palazzi C.
  • Pozza M.
  • Rao A.
  • Tarkoma S.

Mobile networks are expected to serve a wide range of verticals, however the Long Term Evolution (LTE) network is optimized for basic mobile operator services only. The network functions serving LTE networks are largely implemented as dedicated single function devices that offer poor customization options. This intrinsic inflexibility makes current ...

A Smart2 Gaussian process approach for indoor localization with RSSI fingerprints

  • Bisio I.
  • Lavagetto F.
  • Sciarrone A.
  • Yiu S.

Location Fingerprinting (LF) is a promising localization technique that enables many commercial and emergency Location-Based Services (LBS). The idea of this paper is two- folded. First, a Gaussian Process (GP) is used during the training (offline) phase of an indoor positioning algorithm to generate the fingerprint database, reducing the expensive ...

Enhancing coexistence in the unlicensed band with massive MIMO

  • Bonfante A.
  • Claussen H.
  • Garcia-Rodriguez A.
  • Geraci G.
  • Giordano L.
  • Lopez-Perez D.

We consider cellular base stations (BSs) equipped with a large number of antennas and operating in the unlicensed band. We denote such system as massive MIMO unlicensed (mMIMO-U). We design the key procedures required to guarantee coexistence between a cellular BS and nearby Wi-Fi devices. These include: neighboring Wi-Fi channel ...

SMS and one-time-password interception in LTE networks

  • Holtmanns S.
  • Oliver I.

The Interconnection network connects the communication networks themselves to each other enabling features such as roaming and data services between those said networks. It has been known since 2014 that using the legacy SS7 (Signaling System No. 7) protocol SMS based traffic can be intercepted. Network providers are now moving ...

Lightweight service replication for ultra-short latency applications in mobile edge networks

  • Farris I.
  • Flinck H.
  • Iera A.
  • Taleb T.

Edge Cloud infrastructure will play a key role in extending the range of supported real-time cloud applications, by guaranteeing extremely fast response times. However, user mobility requires fast relocation of service instances, which represents an open challenge for resource-constrained cloudlets interconnected by high-latency and low-bandwidth links. In this paper, we ...

Sharing Helps in Labeling Trees

  • Nicholson P.
  • Pawel Gawrychowski

We resolve the space complexity of labeling schemes for two closely related problems on trees to within lower order terms: the tree distance labeling problem and the level-ancestor labeling problem. In the tree distance labeling problem we are asked to generate labels (i.e., bit strings) for each node in a ...

Sharing performance measurement events across domains

  • Apajalahti K.
  • Kapoor S.
  • Niiranen J.
  • Raisanen V.

Network management activities, such as fault analysis and configuration management, are eventually related to changes in network measurements. Some measurement event might be either a trigger or objective of a management activity. We argue that sharing the semantics of performance data across networks provides a basis for more advanced automation. ...

Layer-independent PCI assignment method for Ultra-Dense multi-layer co-channel mobile Networks

  • Ali-Tolppa J.
  • Mwanje S.

Ultra-Dense Networks (UDNs) are Heterogeneous Networks (HetNets) that deploy a high density of small cells over-laying the traditional macro cells. If several Long Term Evolution (LTE) layers share the available spectrum, assigning the Physical Cell Identities (PCIs) becomes complicated due to the density and the diversity of the network. Since ...

SDN-based transparent flow scheduling for heterogeneous wireless LANs

  • Bosch P.
  • De Schepper K.
  • De Schepper T.
  • Famaey J.
  • Hawinkel C.
  • Latre S.
  • Zeljkovic E.

The current local area networks (LANs) are occupied by a large variety of heterogeneous consumer devices, equipped with the ability to connect to the Internet using a variety of different network technologies (e.g., Ethernet, 2.4 and 5GHz Wi-Fi). Nevertheless, devices generally opt to statically connect using a single technology, based ...

Compressive high-speed stereo imaging

  • Pang S.
  • Sun Y.
  • Yuan X.

A compressive high-speed stereo imaging system is reported. The system is capable of reconstructing 3D videos at a frame rate 10 times higher than the sampling rate of the imaging sensors. An asymmetric configuration of stereo imaging system has been implemented by including a high-speed spatial modulator in one of ...

An experimental system for verifying topology changes in mobile communication networks

  • Ali-Tolppa J.
  • Carle G.
  • Sanneck H.
  • Tsvetkov T.

Automatic Configuration Management (CM) parameter change assessment, the so-called Self-Organizing Network (SON) verification, is an important enabler for stable and high-quality modern mobile communication networks. However, it also presents a new set of challenges. While improving network stability and resolving unexpected conflicts caused by parallel configuration changes, SON verification can ...

An adaptive detection and prevention architecture for unsafe traffic in SDN enabled mobile networks

  • Kantola R.
  • Khatri V.
  • Monshizadeh M.

The forthcoming 5G cloud networks will utilize software defined networking (SDN) and network functions virtualization (NFV) to provide new services. However, applying these technologies introduce new threats to network. To detect the security attacks and malicious traffic both on end user and cloudified mobile network, we apply centralized monitoring and ...

A Web-based framework for fast synchronization of live video players

  • De Turck F.
  • De Vleeschauwer D.
  • Pauwels D.
  • Petrangeli S.
  • Van Der Hooft J.
  • Wauters T.

The increased popularity of social media and mobile devices has radically changed the way people consume multimedia content online. As an example, users can experience the same event (e.g. a sports event or a concert) together using social media, even if they are not in the same physical location. Moreover, ...

Analysis of a large multimedia-rich web portal for the validation of personal delivery networks

  • Bostoen T.
  • De Turck F.
  • Huysegems R.
  • Petrangeli S.
  • Rahman R.
  • Van Der Hooft J.
  • Verzijp N.
  • Wauters T.

With the increasing popularity of multimedia-rich web portals, reducing latency has become more and more important. The current median web page load time is in the order of seconds, while research has shown that user waiting times must remain below two seconds to achieve optimal acceptance. In this paper, we ...

On non-parametric models for detecting outages in the mobile network

  • Camino R.
  • Falk E.
  • Gurbani V.
  • State R.

The wireless/cellular communications network is composed of a complex set of interconnected computation units that form the mobile core network. The mobile core network is engineered to be fault tolerant and redundant; small errors that manifest themselves in the network are usually resolved automatically. However, some errors remain latent, and ...

Online Mobile User Speed Estimation: Performance and Tradeoff Considerations

  • Capdevielle V.
  • Chen C.
  • Eitan Altman
  • Herculea D.
  • Majed Haddad

This paper presents an online algorithm for mobile user speed estimation in 3GPP Long Term Evolution (LTE)/LTE-Advanced (LTE-A) networks. The proposed method leverages on uplink (UL) sounding reference signal (SRS) power measurements performed at the base station, also known as eNodeB (eNB), and remains effective even under large sampling period. ...

5G E-band backhaul system evaluations: Focus on moving objects and outdoor to indoor transmission

  • Aronkyto K.
  • Du Z.
  • Kapanen J.
  • Ohlmer E.
  • Putkonen J.
  • Swist D.

It is expected that small cells will carry more than half of the total traffic in 5G, resulting in a huge increase of wireless backhaul traffic. To successfully design and deploy the mmW backhaul system, it is essential to evaluate the performance in different scenarios, also links installed in low ...