"On Protection Schemes in MPLS-based Radio Access Networks", 13th GI/ITG Conference on Measurement, Modeling, and Evaluation of Computer and Communication Systems (MMB 2006), Nürnberg, March 2006.
Dipl.-Ing. René Böringer
Prof. Dr.-Ing. habil. Andreas Mitschele-Thiel
- Reliability of IP-based radio access networks is an important issue to ensure reliable mobile services. This paper studies the application of different protection schemes to MPLS networks. Previous work on MPLS protections
schemes has exclusively focused on backbone networks rather than radio access networks. We identify the differences between backbone and access networks with respect to protection schemes. In addition, we discuss the impact of
MPLS-based micro-mobility solutions, QoS and management issues. Different from the pre-reservation-based protection schemes known from literatur, a more applicable approach accelerating the LSP repair process without relying on hard
reservations is proposed and evaluated. An analytical model is used to compare the protection and restoration schemes. Our study is based on well known reference networks in addition to three larger networks. Our results show that
the previously used reference networks are insufficient to study the performance of protection schemes, especially of radio access networks. Considering their specific requirements and the possibility of LSP rejections we
show that simple local restoration schemes perform best.