'CSCAN Network' Research Student Profile

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Dr Armin Lehmann PhD

CSCAN Network Research Student

Brief biographical information

armin.lehmann@plymouth.ac.uk

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Service composition based on SIP peer-to-peer networks

Today the telecommunication market is faced with the situation that customers are requesting for new telecommunication services, especially value added services. The concept of Next Generation Networks (NGN) seems to be a solution for this, so this concept finds its way into the telecommunication area. These customer expectations have emerged in the context of NGN and the associated migration of the telecommunication networks from traditional circuit-switched towards packet-switched networks.
One fundamental aspect of the NGN concept is to outsource the intelligence of services from the switching plane onto separated Service Delivery Platforms using SIP (Session Initiation Protocol) to provide the required signalling functionality. Caused by this migration process towards NGN SIP has appeared as the major signalling protocol for IP (Internet Protocol) based NGN. This will lead in contrast to ISDN (Integrated Services Digital Network) and IN (Intelligent Network) to significantly lower dependences among the network and services and enables to implement new services much easier and faster. In addition, further concepts from the IT (Information Technology) namely SOA (Service-Oriented Architecture) have largely influenced the telecommunication sector forced by amalgamation of IT and telecommunications. The benefit of applying SOA in telecommunication services is the acceleration of service creation and delivery. Main features of the SOA are that services are reusable, discoverable combinable and independently accessible from any location. Integration of those features offers a broader flexibility and efficiency for varying demands on services.
This thesis proposes a novel framework for service provisioning and composition in SIP-based peer-to-peer networks applying the principles of SOA. One key contribution of the framework is the approach to enable the provisioning and composition of services which is performed by applying SIP. Based on this, the framework provides a flexible and fast way to request the creation for composite services. Furthermore the framework enables to request and combine multimodal value-added services, which means that they are no longer limited regarding media types such as audio, video and text. The proposed framework has been validated by a prototype implementation.

Dr Armin Lehmann

Director of studies: Prof. Dr Woldemar Fuhrmann
Other supervisors: Prof. Dr Ulrich Trick, Dr Bogdan V Ghita

Conference papers

A New Approach to Model a Formalised Description of a Communication Service for the Purpose of Functional Testing
Wacht P, Eichelmann T, Lehmann A, Fuhrmann W, Trick U, Ghita BV
Proceedings of the Fourth International Conference on Internet Technologies and Applications (ITA 11), 6-9 September 2011, Wrexham, UK, pp 262-269, ISBN: 978-0-946881-68-0, 2011
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1 Conference papers

Internal publications

Integration of Model-Based Functional Testing Procedures within a Creation Environment for Value Added Services
Wacht P, Lehmann A, Eichelmann T, Fuhrmann W, Trick U, Ghita BV
Proceedings of the Sixth Collaborative Research Symposium on Security, E-learning, Internet and Networking (SEIN 2010), Plymouth, UK, ISBN: 978-1-84102-269-7, pp61-73, 2010
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A New Approach to Classify and Describe Telecommunication Services
Lehmann A, Fuhrmann W, Trick U, Ghita BV
Proceedings of the Fifth Collaborative Research Symposium on Security, E-learning, Internet and Networking (SEIN 2009), Darmstadt, Germany, ISBN: 978-1-84102-236-9, pp173-182, 2009
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New Possibilities for the Provision of Value-Added Services in SIP-Based Peer-To-Peer Networks
Lehmann A, Fuhrmann W, Trick U, Ghita BV
Proceedings of the Fourth Collaborative Research Symposium on Security, E-learning, Internet and Networking (SEIN 2008), Wrexham, UK, ISBN: 978-1-84102-196-6, pp166-175, 2008
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3 Internal publications

4 publication(s) - all categories.