Hierarchical dynamic index NAT as a mobility solution

Abstract

Mobility in wireless networks causes a major issue from the IP-addressing perspective. When a Mobile Node (MN) moves to another subnet, it will probably get assigned a new IP address. This causes a routing problem since the MN will not be reachable with its previous IP address known to the other communication party. Real time applications might suffer from connection drops, which is recognized as inconvenience in the currently used service, unless some solution is provided. An approach to maintain session continuity while traversing heterogeneous networks of different subnet addresses is proposed. Here, a cross-layer module is implemented in OMNeT++ with NAT functionality to provide a seamless handover. A proof of concept is also shown with analogy to the Mobile IPv6 protocol provided in INET.

Enabling Soft Vertical Handover for MIPv6 in OMNeT++

“…The controller module in [3] is a controlling entity to all wireless interfaces at the link layer. It receives requests from the underlaying interfaces for permissions to associate to its relevant networks when available in range.…”

“…The concept of make-before-break is therefore implemented to provide a soft switching of traffic between the available wireless interfaces/networks. An extension to our previous work in [3] is presented to support mobile IP version 6 (MIPv6) and adopt its functionality in xMIPv6 model [4] of INET v2.6 framework in OMNeT++ [5]. The support of the availability of multiple wireless interfaces with possible connectivity switching in between motivates further investigations and, hence, modifications to implemented protocols and modules.…”

“…The support of the availability of multiple wireless interfaces with possible connectivity switching in between motivates further investigations and, hence, modifications to implemented protocols and modules. [3] implements a link layer controller module (vhoCtrler) within a compound model named IPCoManager to support soft handover in IPv4-based MNs. IPCoManager includes also handover decision algorithms in a more sophisticated form and an agent module that manages address resolution, as explained in [3], these are however out of focus here.…”

“…[3] implements a link layer controller module (vhoCtrler) within a compound model named IPCoManager to support soft handover in IPv4-based MNs. IPCoManager includes also handover decision algorithms in a more sophisticated form and an agent module that manages address resolution, as explained in [3], these are however out of focus here.…”