Composition in Heterogeneous Service Networks: Requirements and Solutions.

Telecommunication networks are service centric and therefore benefit from service composition techniques in accordance to Service Oriented Architecture (SOA) principles. Furthermore, services in the telecommunication domain are subject to specific requirements and topologies of service usage. Examples are services within end-to-end communication sessions and the need to handle service interaction across technological worlds. This includes telecom, enterprise and Internet services. A common service layer for IT and telecommunication needs to be able to handle compositions of services from multiple technological worlds. This paper provides an analysis of the service usage that is typical for various service technologies and it outlines a composition approach that is made to handle heterogeneous composite services.