This page contains a Flash digital edition of a book.
interoperability


Connecting a TETRA network to public LTE


Last year, TETRA Today looked at GERYON, an EU-financed project to build a secure infrastructure to connect private mobile networks with public systems for emergency communications. Roberto Maza describes the team’s progress since then


A number of specific applications were designed and


implemented by members of the GERYON consortium for this to happen. Firstly, the GERYON IMS domain that provides the organizational support for general IMS communication was developed. Ten the LTE terminal was equipped with a GERYON-Droid (G-Droid) application, enabling it to establish the connection with the GERYON IMS domain. A GERYON Enhanced Gateway (GEGW) was used for the interconnection between the TETRA system and the GERYON IMS domain. Te connections between LTE/Wi-Fi/TETRA and the GERYON domain are currently through the Internet (via VPN connections). Te central management system of the GERYON domain,


Figure 1: A voice call between TETRA and LTE terminals via GERYON T


he GERYON project is halfway on its journey towards the development of a technology independent system for emergency networks and services based


upon IP Multimedia Subsystem (IMS). During the first 15-months of the project, the GERYON


consortium has made significant progress in several areas. Tese include end-user’s requirement collection, system architecture design, internal components design and development of the architecture and its components. Based upon this firm foundation, a number of tests of some of GERYON’s functionalities and services have been conducted. For example, the establishment of interoperability calls between two technologically independent communication networks (i.e. LTE and TETRA).


First trials By utilizing the GERYON inter-networking communication platform, a first interoperability test was carried out between an LTE network located in Athens (Greece) and a TETRA system situated in Bilbao (Spain). During the test, a full duplex international and inter- network call was established between two end-users (one utilized an LTE device while the other employed a TETRA terminal), as shown in Figure 1.


12


called the GERYON Enhanced Management System (GEMS), is connected directly to the IMS zone. GEMS comprises the management logic for all GERYON emergency services and will control/manage the operation of GEGW, a GERYON Media Gateway (for media transcoding), a GERYON Security Gateway (for cross-ciphering), control room and connections with other GERYON compliant networks. Te European FP7 Project GERYON is seeking to improve


and modernize the communications used by the emergency services. First of all, it has set out to overcome existing incompatibilities among several communication systems (e.g. LTE, TETRA, Wi-Fi) and facilitate the interconnection among emergency services, regardless of the technology or geographical situation. And secondly, it aims to offer secured and enhanced services: the security of classical emergency transmitters with the multimedia capability that is offered by 4G/LTE networks.


nTe project can be followed at www.sec-geryon.eu


The GERYON consortium G


ERYON brings together SMEs Viotech (France) and CYS Group (Spain), the mobile network providers Cosmote (Greece) and Itelazpi (the Basque Country), and three research centres – the University of the Basque Country, the University of Plymouth (UK) and NCSR Demokritos (Greece).


TE TRA TODAY Issue 14 2013


Page 1  |  Page 2  |  Page 3  |  Page 4  |  Page 5  |  Page 6  |  Page 7  |  Page 8  |  Page 9  |  Page 10  |  Page 11  |  Page 12  |  Page 13  |  Page 14  |  Page 15  |  Page 16  |  Page 17  |  Page 18  |  Page 19  |  Page 20  |  Page 21  |  Page 22  |  Page 23  |  Page 24  |  Page 25  |  Page 26  |  Page 27  |  Page 28  |  Page 29  |  Page 30  |  Page 31  |  Page 32  |  Page 33  |  Page 34  |  Page 35  |  Page 36  |  Page 37  |  Page 38  |  Page 39  |  Page 40  |  Page 41  |  Page 42  |  Page 43  |  Page 44