A Seamless Handoff Scheme for Mobility Management in MPLS based Wireless Network

Enterprise-level networks are designed to provide a fast way of communication across the globe. One of the most popular protocols used for such a network is known as MultiProtocol Label Switching (MPLS). Due to the fast packet forwarding mechanism from source to destination with the Quality of Service (QoS) feature, MPLS is capturing significant attention in the related market of network protocols. Due to the proliferation of mobile devices, end nodes are expected to accomplish mobility behavior more frequently nowadays. This study aims to explore, examine and propose a smooth mobility handling technique that helps in the deployment of MPLS-based wireless networks. Some solutions have already been proposed to manage such kind of mobility, however, they suffer from drawbacks like higher delay, packet loss, and bottleneck during handoff operation, In this research work, the complete lifecycle of MPLS packet is described, from entering into the MPLS clouds to reaching its destination without compromising QoS and layer overlapping. The presence of a stack table at every Edge Router (ER) helps to manage packet information of missing or moved MNs for future use. Simulation of the proposed idea is performed in Network Simulator (NS-2), and User Datagram Protocol (UDP) is used as the source for packet transmission from the Internet and MPLS cloud to the MN. By concentrating on the packet lifecycle in the entire communication, results are obtained from the simulation and compared with previously proposed models. These results noticeably illustrate that how the new proposed scheme is better to packet loss, Packet Delivery Ratio Fraction (PDF), Normalize Routing Load (NRL), and delay as compared to the existing solution.