GROW News May/2015

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GROW News May/2015

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Vol. 10, No. 4, May 2015


In this issue:

1. Under the spotlight

2. People

3. Publications

4. Conferences, Meetings & Seminars

5. Projects


1. Under the spotlight

Bringing your attention to a matter in this issue of the Newsletter

Network virtualisation has been introduced as a tool for large scale experimental networks, but it is also proposed as an approach for a future Internet architecture. The definition and benefits of network virtualisation is a common understanding among all architecture proposals. The main goals to achieve through virtualisation are the isolation of physical network resources, and the holding of multiple independent and programmable logical networks. Implementing multiple network architectures on top of the isolated logical networks allows for a meta architecture, where multiple architectures and testbeds for experimenting new architectures are enabled. The operation of such multiple networks leads to user and application specific logical networks, as well as to new business models for operators.

Several strategies for the provision of physical capacity to multiple Virtual Base Stations (VBSs) with different type of requirements have been presented and evaluated. The management of radio resource sharing is based on the perspective of Virtual Base Stations as an aggregated connectivity resource abstracted from a group of Radio resource Units of different Radio Access Technologies, allowing to benefit from Cooperative Radio Resource Management strategies. Instead of looking at wireless virtualisation from the perspective of the instantiation of virtual machines in the wireless nodes, our view is the virtualisation of the wireless access to provide a contracted capacity to the Virtual Network Operator, in order to serve its end-users. Three situations have been explored: the number of VBSs is increasing for all services in the same way, one VBS per service (Harmonised case); the number of guaranteed bit rate (GRT) VBSs increases by one for each GRT service, while the number of best effort (BE) VBSs is maintained with two VBSs for each service (GRT case); the number of GRT VBSs is maintained with two VBSs for each service, and the number of BE VBSs increases by one for each BE service (BE case). As an overall conclusion, one can say that the percentage of leased GRT capacity over the physical one is the main factor to take into account for physical capacity sharing, superseding the number of created VBSs. This analysis confirms the need for establishing a limit for the data rate contracted by GRT VBSs, independently of the number of VBSs, in order to allow an efficient use of Radio resource Units among all the VBSs deployed within a cluster.

Luisa CaeiroPicture4


2. People

Information about incoming and outgoing people, besides other related news.

GROW will have, in June, once more, the visit of Slawomir Ambroziak (Gdansk Tech. Univ., Gdansk, Poland), following an existing collaboration in between the two research groups. The aim of the visit is to work on the development of model for channel characterisation for dynamic Body Area Networks.



3. Publications

Information about publications, at both national and international levels, concerning papers submitted, accepted, or published in the period.

Carla Oliveira, Michal Mackowiak and Luis M. Correia, “Uplink Exposure Assessment of 3G/4G Wireless Devices”, submitted to Workshop on Low‐EMF Radio‐link Technologies and Wireless Networks Management, at ISWCS’2015 — International Symposium on Wireless Communication Systems, Brussels, Belgium, Aug. 2015.

Daniel Sebastião, B.W. Martijn Kuipers and Luis M. Correia, “Exposure Assessment in Heterogeneous Networks Accounting for Up- and Downlinks”, submitted to Workshop on Low‐EMF Radio‐link Technologies and Wireless Networks Management, at ISWCS’2015 — International Symposium on Wireless Communication Systems, Brussels, Belgium, Aug. 2015.

Luisa Caeiro, Sina Khatibi, Lúcio Ferreira and Luis M. Correia, “A Perspective on Virtual Radio Access Networks”, Proc. of COST IC1004 Workshop on Evolution of Radio Access Network Technologies towards 5G, Valencia, Spain, May 2015.

Sławomir J. Ambroziak, Luis M. Correia, Ryszard J. Katulski and Michał Maćkowiak, “Measurements of Path Loss in Off-Body Channels in Indoor Environments”, Proc. of AT-RASC’2015 – 1st URSI Atlantic Radio Science Conference, Gran Canaria, Spain, May 2015.



4. Conferences, Meetings & Seminars

List of Conferences, Meetings, Seminars, and other events held and attended during this period, and to be held the following month.


Luís M. Correia, “A Perspective on Virtual Radio Access Networks”

COST IC1004 Workshop on Evolution of Radio Access Network Technologies towards 5G, Valencia, Spain



Luís M. Correia

COST IC1004 meeting, Valencia, Spain



Andrea Marotta, “Optimisation of Radio Access Network Cloud Architectures Deployment in LTE-Advanced”

Cláudia Castro, “Optimisation of Ground Stations Location in Aeronautical Multilateration Systems”

GROWing meeting



Lúcio Ferreira,

Ph.D. Jury of María Angel Lema Rosas, “Contribution to the optimization of 4G mobile communications by means of advanced carrier aggregation strategies”

UPC, Barcelona



Luís M. Correia

23rd Seminar on Mobile Communications Systems, Lisbon, Portugal



Luís M. Correia

Visit to Gdansk Tech. Univ., Gdansk, Poland



Luís M. Correia

IEEE ICC’2015, London, UK



Luís M. Correia

“A Perspective on Virtual Radio Access Networks”,

1st FEUP Doctoral Congress in Engineering, Porto, Portugal, June 2015.



Luís M. Correia

NEWCOM# Executive Board meeting, Bologna, Italy



Luísa Caeiro, “Addressing Multiple Virtual Resources in the Same Geographical Area”

Carla Oliveira, “Capacity Analysis for On-Body Communications in an Indoor Environment”

Sina Khatibi, “Modelling Virtual Radio Resource Management with Traffic Offloading Support”

GROWing meeting



Luís M. Correia, Luisa Caeiro, Sina Khatibi, Daniel Sebastião, Mónica Branco

EuCNC’2015, Paris, France



5. Projects

News about the several projects in which GROW is involved.

COST IC1004 –

A joint work in off-body channel models for Body Area Networks with Gdansk University of Technology is progressing.



Based on the work done so far in WP5, two papers were submitted to a Special Session on Low-EMF Radio-Link Technologies and Wireless Networks Management on the ISWCS2015 conference. This work was also inserted in D5.2 “Smart low-EMF architectures: results and recommendations”, the final deliverable of WP5, and will be into WP2 report as well.


 MCN –

The work on the implementation of VRRM in OAI LTE base station emulator, as well as integrating traffic scenarios, has been concluded. It is currently being evaluated for various scenarios.



A book with the key results of the project is being prepared.


FAQtos –

27 groups have delivered their project on the 2015 edition of Prémio FAQtos. The selection jury is now evaluating all the material delivered, and the 10 finalists will be announced on June 12th. The final Ceremony of this contest will be hosted at IST on July 11th. Continuous monitoring of EMFs is still ongoing in Valongo, with 5 monitoring stations, and 1 further station is installed in Felgueiras, with the removal already planned for mid June.