5GENESIS: The Genesis of a flexible 5G Facility

In CAMAD 2018, I presented the paper entitled “5GENESIS: The Genesis of a flexible 5G Facility” (PDF), which describes the pathway towards the realisation of a 5G Facility that will allow the validation of the major 5G Key Performance Indicators (KPIs). It reflects the approach that the 5GENESIS consortium will adopt in this direction. More precisely, it describes the key design principles of such Facility as well as the targeted use cases for the KPIs validation. The adopted approach for the Facility realisation includes the design of a common implementation blueprint that will be instantiated in five Platforms distributed across Europe. To maximise the diversity and the efficiency of the Facility, complementary performance objectives have been selected for the Platforms, while specific characteristics from different vertical industries have been allocated to each of them.

Screenshot_2

he five platforms of the 5GENESIS Facility (Figure 1) and their main features are as follows:

  • The Athens Platform provides a shared radio infrastructure (gNBs and small cells) with different ranges and overlapping coverage that is supported by an SDN/NFV enabled core and enabled edge-computing capabilities. It is conceived to showcase scenarios where multimedia content delivery and low latency applications coexist in large public-events.
  • The Málaga Platform brings automated orchestration and management of different network slices over multiple domains, on top of the 5G New Radio (NR) access and fully virtualised core network to showcase Mission Critical Services (MCS) running in an Edge Computing platform and outdoor deployments.
  • The Limassol Platform offers radio interfaces of different characteristics and capabilities, combining terrestrial and satellite communications, integrated to showcase service continuity and ubiquitous access in underserved areas together with interoperability of IoT components deployed within these areas.
  • The Surrey Platform features multiple radio access technologies that can support massive Machine Type Communications (mMTC), including 5G NR and NB-IoT, combined under a flexible Radio Resource Management (RRM) and spectrum sharing platform to showcase massive IoT services.
  • The Berlin Platform contains ultra-dense areas covered by various network deployments, ranging from indoor nodes to nomadic outdoor clusters, coordinated via advanced backhauling technologies to showcase immersive service provisioning.

In alignment with the 5G-PPP targets for the experimentation phase of 5G, the 5GENESIS Facility will mainly be used to validate the following performance indicators:

a)    Service level Performance Indicators

Data rates. Athens, Limassol, Berlin and Málaga platforms will demonstrate high data rates for eMBB. For example, Málaga will demonstrate the concurrent use of 10 to 20 cameras with real time high quality video in a small area (300m x 300m), with several configurations combining LTE, 5G NR and Optical fibre to balance the traffic distribution.

Reliability and latency. Málaga Platform will demonstrate Mission Critical Services (MCPTT, MCVideo and MCData, based on 3GPP R14) in both lab and outdoor deployments. Although the current KPIs defined by 3GPP in release 13 are not so strict to URLLC applications (e.g. tele-surgery), the same deployments will be used to demonstrate latency <10ms, reliability >99% and availability >99%. Experiments conducted indoor in laboratories could demonstrate even more ambitious performance KPIs.

b)    Application level Performance Indicators

The 5GENESIS Facility will be instrumental in also assessing the overall service improvement, by measuring application-level indicators, such as: i) the user-perceived quality of experience (QoE), ii) the impact to the E2E security guarantees.

Quality of Experience. The QoE assessment will be studied in the Athens, Málaga and Berlin Platforms, where Human Type Communications (HTC) are foreseen. The validation concept will involve real end-users in the assessment process combined with objective QoE estimation methods [9]. The Berlin Platform will evaluate the provided network quality over a heterogeneous set of backhauling nodes, using mmWave and optical fibre links. The Málaga Platform will evaluate QoE with the Police Department in the context of Mission Critical Services.

Security. Regarding the security-related assessment, the Athens platform will be responsible for examining the security in a dense urban environment for demanding video services. The goal here is to provide a content delivery framework by taking advantage of the SDN/NFV technologies without affecting security or violating privacy.

c) Network Level Performance Indicators

Coverage. The Limassol platform will demonstrate ubiquitous 5G coverage, with scenarios oriented to maritime communications, rural and underserved areas. The platform will combine satellite communications links with terrestrial backhaul and access technologies, employing advanced link aggregation and optimisation technologies, integrating them all in the overall 5G network.

Density. The Surrey platform will support mMTC in a network of densely distributed NB-IoT and LoRa nodes. In the demonstration event, the platform will be stressed to achieve 1000X simultaneously connected devices, starting with ~1000 real nodes and pushing the system to the limits with additional set of simulated ones.

Network lifecycle management. Performance metrics such as the slice establishment time, the VNF relocation and instantiation times, and the computational resource usage of the cloudified protocol stack, will also be considered. Such metrics will be quantified in the Surrey and Málaga platforms. In this regard, the goal is to exemplify in an E2E fashion the trade-off between the flexibility required in the 5G networking and the constraints and limitations of the virtualization and ETSI MANO frameworks to be used. These measurements will also provide a way to understand the type and benefits of self-adaptable mechanisms that can be put in place to minimise the gap between the flexibility and constraints provided by virtualisation.

Performance Testing of Mobile Chatbot Applications

In CAMAD 2018, a paper (PDF) that I co-authored introduces a new metric related to the Service Stability of mobile Chatbot Applications. The service stability metric is directly dependent to the following observed issues:

  • Image Loss,
  • Message Repetition,
  • Message Reorder and
  • Auxiliary Keyboard Loss.

Each of these observed issues has a different bias in the calculation formula of service stability. In the following equation the N represents the total number of steps in each scenario and m represents the number of successfully executed steps. The variable Ii is equal to 1 for each step that is observed the corresponding issue and equal to 0 elsewhere.

Each test score is normalized to the maximum score that can be achieved for each chatbot, so the best value for the service stability is 1 and the worst is 0. This metric provides an insight of the QoE that the user experiences under different reception conditions, quantifying the impact of the various impairments to the final service provision.

For the experimental needs of the paper, the proposed metric was validated based on experimental data retrieved by the 5G-TRIANGLE experimental testbed. Therefore, three different types of chatbots over Viber platform used for the execution of the experiment, each one having a different degree of complexity and requirements. The following Table summarizes the features of each chatbot.

Chatbot No. Features
Static Messages Database Communication API-based Communication
Chatbot #1
Chatbot #2
Chatbot #3

For the execution of the experiment it was mandatory to use the commercial application of Viber, via which the user would have access to the chatbot service. For the emulation of cellular network, the TRIANGLE testbed is using the UXM Wireless Test Platform device by Keysight. This device is capable of modifying a number of parameters of the wireless physical layer and thus emulate various network conditions. The parameters that modified in this experiment are:

  • the number of Downlink and Uplink Physical Resource Blocks (PRBS),
  • the number of Downlink and Uplink Subframes,
  • the Multipath Fading Propagation Conditions (EPA, EVA, ETU),
  • the antenna output power,
  • the mode, the type (AWGN) and the power of the environmental noise,
  • the max Doppler shift

Each mobile device was directly connected to the Keysight Source Management Unit instead of the battery and supplied with 5V DV voltage. This set-up was offering a flexible configuration to meet the power sourcing and analysis requirements.

Screenshot_1

For the orchestration of the experimental process as well as the configuration of the UXM and SMU devices the TRIANGLE testbed used the Keysight KS8400A Test Automation Platform (TAP). This software was enabling a powerful, flexible and extensible test sequence and test plan creation.

The mobile devices were controlled via the Quomation WebDriver, a test automation framework for use with native, hybrid and mobile web apps. Furthermore, the Quamotion Frontend provided a device monitoring and controlling interface. The mobile devices used in this experiment were the Samsung Galaxy S7 and Samsung Galaxy S4.

 

23rd International Conference on Telecommunications

CALL FOR PAPERS
23rd International Conference on Telecommunications (ICT 2016)
May 16-18, 2016, Thessaloniki, Greece
http://ict-2016.org

Highlights:
– ICT 2016 conference is Technically co-sponsored by IEEE Communications Society
– Accepted, registered and presented papers will be published in the ICT 2016 conference proceedings and submitted to IEEE Xplore as well as other Abstracting and Indexing (A&I) databases.
– Distinguished Keynote Speakers announced:
Mohamed-Slim Alouini (King Abdullah Univer. of Science and Technology)
Mike Short (Vice President – Telefonica Europe)
Robert Schober (Friedrich-Alexander University of Erlangen-Nuremberg)

—–
Important Dates:
Paper submission (main track): January 31, 2016
Special Session Proposals: January 15, 2016 (extension upon request)
Paper submission (Special Sessions): February 15, 2016
Paper Acceptance Notification: March 1, 2016
Camera-Ready Papers: March 10, 2016

—–
Scope:
The 23rd International Conference on Telecommunications (ICT 2016) will be held in Thessaloniki, a modern metropolis bearing the marks of its stormy history and its cosmopolitan character, known for its hospitality and cuisine.

This year’s theme “Expansion to Small” aims to draw research community’s attention to the enormous anticipated expansion of communication systems through small architectures and devices. Small cells, short wavelengths, small sensors, small scale communications going down to molecular level are expected to boost next generation communications leading to Big Data networking, massive Internet of Things and green, energy efficient applications. Additionally, high quality papers on all aspects of contemporary research and applications of telecommunications are welcome.

The Organizing Committee invites proposals for Workshops/Special Sessions/Tutorials/Demos to be held in ICT 2016. More information can be found in http://ict-2016.org (under “Submissions”).

—–
Submission Guidelines:
Prospective authors are invited to submit high-quality original technical papers reporting original research of theoretical or applied nature for presentation at the conference and publication in the IEEE ICT 2016 Proceedings. All submitted papers will be peer-reviewed. The manuscripts must be prepared in English with a maximum paper length of five (5) printed pages (following the standard IEEE 2-column format) without incurring additional page charges (maximum 2 additional pages with over length page charge of USD100 for each page if accepted). Please note that for every accepted contribution, at least one person must register for the conference and present. Accepted papers not presented in the conference will be excluded from the proceedings.

All papers for ICT 2016 should be submitted via EDAS using http://www.edas.info/newPaper.php?c=21703

Workshop/Tutorials/Special Sessions/Demo proposals can be directed to the corresponding chairs as described in the conference web site.

—–
Organizing Committee:

General Co-Chairs:
Mischa Dohler, King’s College London, UK
George Karagiannidis, Aristotle University of Thessaloniki, Greece

Technical Program Chairs:
Periklis Chatzimisios, Alexander TEI of Thessaloniki, Greece
Athanasios C. Iossifides, Alexander TEI of Thessaloniki, Greece
Shiwen Mao, Auburn University, USA
Kan Zheng, Beijing University of Posts & Telecommunications, China
Vasilis Friderikos, King’s College London, UK

For all the members of the ICT 2016 Organizing Committee, please visit http://ict-2016.org/#Committees

5th International Conference on Telecommunications & Multimedia (TEMU2012)

Supported by NCSR “Demokritos”/IIT
and technically co-sponsored by IEEE/Communications Society (accepted articles to be included in IEEE Xplore library)

July 30 to August 01, 2012, Heraklion, Crete, Greece

Website: http://www.ieee-temu.org

TEMU2012 is an International conference under the technical co-sponsorship of IEEE/ComSoc, presenting new and original research results and the latest in the-state-of-the-art in Telecommunications and Multimedia. It fosters communication and discussions among researchers, scientists and students working in the design, implementation and applications of telecommunications and multimedia fields. The 2012 conference will provide a three-day Scientific Program, including presentations of invited and regular papers from researchers, manufacturers, academia and services providers. Authors are invited to submit novel, challenging and innovative results on both theoretical and practical aspects of the scope of the conference, which includes but is not limited to:

• Network & Service Infrastructures
• Beyond NGN
• Ad-Hoc and Mobile Networks
• Satellite & Space Communications
• Cognitive Radio & Dynamic Spectrum Access
• Optical Communications and Fiber Optics
• Broadcasting Future Media Internet
• Broadcasting Internet Platforms
• Cloud Computing
• Network Virtualisation
• Content aware networks & Network aware services
• IPTV, Mobile TV and P2PTV
• 3DTV, HDTV
• Service Architectures and Software Engineering
• Multimedia Authoring Tools
• Testbeds and experimentation
• Energy saving and green technologies
• Quality of Service and Quality of Experience
• Security, Privacy and Billing
• Electronic commerce and e-business

Submitted papers should not exceed 6 pages-long, following the Standard IEEE conference templates for MS Word or LaTeX formats. Papers should be submitted as PDF files through the EDAS system (http://edas.info). All submitted papers will be subject to three independent reviews and judged on originality, technical correctness, relevance, and quality of presentation. Accepted papers in TEMU2012 will be also published in IEEE Xplore.

Important Dates
Special sessions and workshops proposals……March 30, 2012
Submission of technical papers…………………..May 07, 2012
Notification of acceptance …………………………June 04, 2012
Submission of camera-ready papers ……………June 25, 2012

Contact Email: info@temu.gr