Isolation optimization technique for 5G RF cavity

Electromagnetic cavity shielding in RF circuit design is a vital part of electromagnetic compatibility and signal integrity. For 4G frequencies this is relatively easy to achieve as the cavity size tends to be small compared to the wavelength. In 5G technology, where carrier frequencies are in very high frequencies (e.g. ...

An improved method for on-demand system information broadcast in 5G networks

  • Ali A.
  • Awada A.
  • Michalopoulos D.

We argue for a new method that applies to on-demand system information (SI) broadcast transmissions. The proposed method is targeted for 5G networks, and is based upon utilizing a cut-off value for the modulation and coding scheme used for broadcasting. Two variants of the proposed scheme are presented, namely the ...

An agile resource management framework for 5G

  • Arnold P.
  • Belschner J.
  • Bronzino F.
  • Bulakci Ö.
  • Calochira G.
  • Celik H.
  • Ericson M.
  • Fodor G.
  • Gutierrez-Estevez D.
  • Ibrahim A.
  • Moya F.
  • Pateromichelakis E.
  • Prasad A.

This paper presents the design foundations of an agile resource management (RM) framework for the fifth generation (5G) radio access network (RAN) by describing essential building blocks (BBs). Overall, the presented RM framework provides holistic RM solutions that consider and exploit the novel aspects of 5G systems, such as, diverse ...

QoS and service continuity in 3GPP D2D for IoT and wearables

  • Kozio D.
  • Moya F.
  • Van Phan V.
  • Xu S.
  • Yu L.

Device-to-Device (D2D) communications have been already playing a relevant role in 3GPP for several releases of the LTE standard. This paper first shortly introduces how D2D was brought into 3GPP standards and how it evolved, starting from direct discovery and communication between devices being specified in Release 12, through UE-to-Network ...

Securing VNF communication in NFVI

  • Ahola K.
  • Kalliola A.
  • Lal S.
  • Oliver I.
  • Taleb T.

In a modern telco cloud, network functions are performed by groups of single or interconnected virtual machines (VMs), which form virtualized network functions (VNFs). Securing these VNFs is both important and challenging, since the VNFs might be performing some mission critical operations and exchanging sensitive information among each other. The ...

End-to-end network slicing enabled through network function virtualization

  • Afolabi I.
  • Bagaa M.
  • Flinck H.
  • Taleb T.

Wireless networks have gone through several years of evolution until now and will continue to do so in order to cater for the varying needs of users. These demands are expected to grow in the future, both in size and variability. Hence, the 5G technology considers these variabilities in service ...

Distributed Transmission and Spatially-Coupled Coding in Multi-Point to Point Networks

  • Buchali F.
  • Eriksson T.
  • Gebhard U.
  • Schmalen L.

We investigate the performance of coded modulation for multi-hop regenerative optical networks. We analyze various simplifications to compute LLRs, compute the achievable rates and show how to optimize distributed spatially coupled FEC schemes.

Compressive Sensing via Convolutional Factor Analysis

  • Jiang H.
  • Wilford P.
  • Yuan X.

We solve the compressive sensing problem via the convolutional dictionary learning. We develop an alternating direction method of multipliers (ADMM) paradigm for compressive inversion. The proposed algorithm can provide the reconstructed images as well as the features, which can be directly used for classification or clustering tasks. A joint compressive ...

Could the Transformation to Cloud-Optimized Networking be Opening a New Era for Dynamic Optical Networking?

  • Sparks K.

Poised to elevate the automated digital economy, new high performance global-scale applications will leverage distributed clouds, network programmability and multi-operator federation. Effective realizations require cohesive multi-layer management of agile reusable resources, driving the necessity for a dynamic optical networking foundation.

Demonstration of 50 Gbps IM/DD PAM4 PON over 10 GHz Class Optics Using Neural Network Based Nonlinear Equalization

  • Feng H.
  • Huang X.
  • Ye C.
  • Zhang K.
  • Zhang D.

We apply digital back propagation based neural network regression algorithms as the nonlinear equalization approach, and realize up to 50Gbps PAM4 IM-DD PON using 10GHz optics with an overall end-to-end 3.6GHz 3-dB bandwidth.

Fiber Nonlinearity Mitigation in WDM Systems: Strategies and Achievable Rates

After reviewing models and mitigation strategies for interchannel nonlinearity, the synergic effect of symbol-rate optimization and phase-noise compensation is investigated. This effect can be practically exploited for nonlinearity mitigation and for the computation of capacity lower bounds.

Components For Space-Division Multiplexing

  • Fontaine N.

Amplifiers, spatial multiplexers, and routing elements that exploit spatial integration will reduce costs and complexity of future space-division multiplexed transmission systems. Managing spatial modes requires new components such as mode multiplexers, mixers, equalizers, and unscramblers.

TWDM PON Preamble Engineering for Mitigation of a DFB Turn-On Blue-Shift in Burst-Mode Operation

  • Borkowski R.
  • Pfeiffer T.
  • Poehlmann W.

We demonstrate two new schemes for DFB optical frequency drift reduction up to 13-GHz, which address issues of previously described methods. Density increase scheme requires only modification of digital data in the preamble and is therefore well-suited for product implementation.

Predicting the maximum endurance time for left-side bridge exercise using machine learning methods and hybrid data

This study was carried out with the intention to create new models to predict the maximum endurance time for the left-side bridge exercise using machine learning methods and hybrid data. Particularly, four different methods including Multilayer Feed-Forward Artificial Neural Network (MFANN), Generalized Regression Neural Network (GRNN), Radial Basis Function Neural ...

A machine learning-based framework for preventing video freezes in HTTP adaptive streaming

  • Bostoen T.
  • De Turck F.
  • Huysegems R.
  • Petrangeli S.
  • Wauters T.
  • Wu T.

HTTP Adaptive Streaming (HAS) represents the dominant technology to deliver videos over the Internet, due to its ability to adapt the video quality to the available bandwidth. Despite that, HAS clients can still suffer from freezes in the video playout, the main factor influencing users' Quality of Experience (QoE). To ...

Hamiltonian system approach to distributed spectral decomposition in networks

  • Avrachenkov K.
  • Jacquet P.
  • Sreedharan J.

Because of the significant increase in size and complexity of the networks, the distributed computation of eigenvalues and eigenvectors of graph matrices has become very challenging and yet it remains as important as before. In this paper we develop efficient distributed algorithms to detect, with higher resolution, closely situated eigenvalues ...

Hamiltonian System Approach to Distributed Spectral Decomposition in Networks

  • Avrachenkov K.
  • Jacquet P.
  • Sreedharan J.

Because of the significant increase in size and complexity of the networks, the distributed computation of eigenvalues and eigenvectors of graph matrices has become very challenging and yet it remains as important as before. In this paper we develop efficient distributed algorithms to detect, with higher resolution, closely situated eigenvalues ...

Feeding back the result of a workflow-driven process to its design with a single Path-Colored flow diagram

  • Daenen K.

An initial analysis of the flows of the self-care portal of a telecom service provider revealed that most consumers did not follow the process to a conclusive end. The percentage of consumers that abandoned the process, was too high to believe they all resolved their problem. A high number of ...

A 20Gbps 1.2GHz Full-Duplex integrated AFE in 28nm CMOS for copper access

  • Cools J.
  • Gurne T.
  • Reynaert P.
  • Strackx M.
  • Tytgat M.

A 28nm CMOS 1.2GHz full-duplex analog front end (AFE) is presented. The AFE can deliver 20Gbps of symmetric service across 50m of RG6 coax. The on-chip line driver, powered from a 7.2V supply and using core transistors, delivers 5.9Vptp differential to the line through the hybrid. A tunable capacitive hybrid ...

Reverberation chambers for testing LTE wireless communication systems

Reverberation chambers are successfully adopted to test last generation wireless communication systems. The aim is the replication of realistic propagation condition in outdoor and indoor situations where the multipath contribution statistically overlaps to the direct path between the base station and the user terminal. The insertion of quantified absorbing materials ...