On the Analysis of Mobility Mechanisms in Micro Mobile MPLS Access Networks

摘要

One of the major challenges for the next generation mobile systems is related to efficient mobilitymanagement issue. In this paper, we propose a new micromobility management scheme, called Micro Mobile MPLS, that supports both mobility and quality-of-service (QoS) management in wireless networks. Our proposal includes two protocol variants. In the first variant, called FHMicroMobile MPLS, we consider the fast handoff (FH) mechanism, which anticipates the LSP (Label Switched Path) procedure setup with an adjacent neighbor subnet that an MN is likely to visit. This mechanism is proposed to reduce service disruption by using the link-layer (L2) functionalities. In the second variant, called FC-Micro Mobile MPLS, the forwarding chain (FC) concept is providedto track efficiently the host mobility within a domain. This concept is more suitable for MNs with high mobility rate. In order to assess the efficiency of our proposals, all underlying protocols are compared. To achieve this, we develop analytical models to evaluate the link usage cost, the registration updates cost, the handoff latency and the packet loss rate. Numerical and simulation results show that the proposed mechanisms can significantly reduce the registration updates cost and provide low handoff latency and packet loss rate under various scenarios.