Competence CenterNetwork & Mobility
ContactProf. Dr.-Ing. Sahin AlbayrakDr.,Ph.D. Fikret Sivrikaya
Partners: GRUPO CORPORATIVO GFI INFORMATICATraffix Systems LtdUniversité de GenèveFachhochschule Vorarlberg GmbHWaterford Institute of TechnologyBlekinge Institute of TechnologyTechnische Universität BerlinTURKCELL ILETISIM HIZMETLERI A.S.Consorzio Nazionale Interuniversitario per le TelecomunicazioniTelefónica Investigación y Desarrollo SociedadAnónima Unipersonal 


Perimeter is a European Union project within Framework Program 7. Perimeter’s main objective is to establish a new paradigm of user-centricity for advanced networking. In contrast to network-centric approaches, user-centric strategies could achieve true seamless mobility. Putting the user at the centre rather than the operator enables the user to control his or her identity, preferences and credentials, and so seamless mobility is streamlined, enabling mobile users to be “Always Best Connected” in multiple-access multiple-operator networks of the Future Internet.


  • Study of the parameters that define the “user-centric seamless mobility”, resulting in new network selection algorithms for achieving the Quality of Experience (QoE) based ABC paradigms. User perceivable preferences, such as quality, price and reputation will be part of the design and implementation. The degree of security, including the level of privacy guaranteed by each technology and service will be part of the definition of QoE.
  • Definition of requirements, development and implementation of “Distributed A3M” protocols suite required for “user-centric seamless mobility.” 
  • Design and development of QoE middleware that support generic QoE definition, QoE signalling and QoE based content adaptation, and consequently, proof-of-concept extension of applications and services for user-centric QoE.
  • Design and development of fast authentication, authorisation and accounting (Fast AAA) models and methods that are different from existing methods, which are access network operator-centric, in that they will
    • Have reduced handover delay, providing seamless handover even between different administrative domains and heterogeneous access networks.
    • Provide unified, user-centric and cross-network means for policy and billing.
  • Design and development of user-centric privacy and anonymisation mechanisms, that allow users to enjoy privacy protection and, if required, logically separate their identity and their activities on the network from the billing process, while retaining their ability to autonomously select the best connection and best service from the available choices in each area. These mechanisms will be designed to be independent from the underlying networking technology, so that fast, inter-technology handovers will still be possible.
  • Obtain the proof-of-concept of the paradigms of user-centric seamless mobility, and the developed integrated applications and services, privacy-preserving operations support middleware components, in heterogeneous environment enabled in large-scale experimentation in multiple interconnected testbeds.
  • Develop realistic privacy and security simulation environment for feasibility tests and overhead analysis in large installations.
  • Release the results of Perimeter as open source software and to support standardisation and wide acceptance by the developers’ community.
  • Set a baseline for future User-Centric Mobility experimentation.


For that, Perimeter will develop and implement protocols designed to cope with increased scale, complexity, mobility and requirements for privacy, security, resilience and transparency of the Future Internet. These include appropriate mechanisms for network selection based on Quality of Experience; innovative implementation of “Distributed A3M” protocols for Fast Authentication, Authorisation and Accounting based on privacy-preserving digital identity models. All these mechanisms will be designed to be independent from the underlying networking technology and service provider, so that fast, inter-technology handovers will be possible. Perimeter will also develop and implement middleware that support generic Quality of Experience models, signalling and content adaptation, and exemplary extension applications and services for user-centric seamless mobility.