Frank-Uwe Andersen

A Distributed IP Mobility Approach for 3G SAE

Future generations of mobile operator networks, based on an all-IP-based flat architecture and a multitude of different access technologies, require a proper IP-based mobility management in place. In this article, a scalable and completely distributed mobility management is presented which is based on a Distributed Hash Table data structure. The Distributed IP Mobility Approach (DIMA) remains completely compatible towards Mobile IP and its variants Hierarchical Mobile IP and Proxy Mobile IP. We examine the average service time per packet and the load caused by lookups in the system, by applying a suitable mobility model and by using a traffic model consisting of a mix of representative traffic classes (HTTP, VoIP, Audio and Video streaming). Thereby, we show that the system remains scalable allowing to serve an arbitrary amount of participants, provides a network-based route optimization and a better resilience than Mobile IP at the cost of only slightly increased signalling effort.

Opportunities, Requirements and Challenges for Storing Network Management Information in a Decentralized Way

The upcoming peer-to-peer (P2P) and other decentralized, co-operative storage mechanisms allow for decentralized storage of data as well as decentralized search, depending on the specific system. In this work, we assume these kinds of systems to store management information into it. We discuss some of the opportunities, requirements, and challenges when storing network management information decentralized. Additionally, we discuss some issue, when we assume the management plane itself being decentralized, adding the aspect of distributed processing. Distribution of storage and processing resources make the use of such systems very helpful, but still require some changes from todays known systems, which are typically targeted to store content for end-users, for example in file-sharing or content delivery networks (CDN).