Nowadays, communication systems based on Internet Protocol (IP) are spread in a wide range of applications. Thereby, conventional communication systems are replaced by VoIP (Voice of over Internet Protocol) solutions. A further trend deals with the integration of new with already existing services into a uniform infrastructure based on the paradigm and discipline of a service-oriented architecture (SOA).

Aim of this diploma thesis is to study different solutions to ensure Quality of Service (QoS) in a service-oriented architecture (e. g. Apache Servicemix and Apache ActiveMQ). Persistence, transactions, synchronous and asynchronous transmission are only some but not all keywords that need to be examined.