A Multilevel Hierarchical topology of Duplication Merging Agents for Mobile IPv6 Soft-Handover

摘要

Mobile IPv6 soft handover is a new scheme that integrates soft handover management in mobile IPv6 in order, to provide better Quality of services (QoS) support of data communication, based on radio transmission between a mobile node (MN) with multiple radio interfaces or software-defined interfaces and an IPv6 internet network. This solution enables the reception of duplicated IPv6 flows by the MN from two or more Access Routers (AR) simultaneously. By merging those flows in IP layer at reception, the MN can simultaneously 1. Avoid connection disruption, packet loss and jitters introduced by wireless radio signal degradation. 2. Allows MN's session to progress without interruption when it moves from one radio cell to another regardless of its radio technology. To perform such thing this solution introduces "Duplication & Merging Agent" (DM) in IPv6 core network. It is a conventional router located at the core network which duplicates and merges IPv6 flows to and from the MN. By the introduction of multilevel hierarchical architecture of DM agents in soft handover, we aims to minimize the second connection establishment and registration latency, confine packets duplication and merging in the local network and reduce signaling messages to and from local network. In this paper we propose and evaluate a set of mechanisms that allows a soft handover to handle with multilevel hierarchical architecture of DM agents.