René Herpertz

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The IP Multimedia Subsystem is a control overlay network that enables the delivery of multimedia services to end subscribers. One of the core steps towards the optimization of an IMS deployment consists of verifying that the involved resources deliver the desired performance when the system is operating under stress conditions. With this goal in mind, this(More)
The IP Multimedia Subsystem (IMS) is becoming the de facto overlay network for enabling the delivery of multimedia services in converged networks. Because it is envisioned that the IMS will experience a considerable growth in the years to come, it is important to verify that the involved resources conforming an IMS deployment deliver the desired performance(More)
Defined by the 3GPP, the IP multimedia subsystem (IMS) is an architectural framework that enables the delivery of multimedia services in mobile networks. Based on the session initiation protocol, the IMS offers unified billing, QoS negotiation mechanisms, and the possibility of combining services deployed in different environments like CAMEL and Parlay OSA.(More)
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