Secure Dynamic Gateway to Internet Connectivity for Ad-hoc Network

Mobile ad hoc networks (MANETs) are autonomous, infrastructureless networks that support multihop communication through IP routing. MANET and the Internet have many differences, which are not only the structure and topology of the networks, but also communication patterns of nodes in both of the networks. It is challenging for MANET to access the Internet due to these differences. There are two different kinds of accessing modes, i.e., single fixed gateway and multi-gateway where the load-balancing overhead may reduce the network performance. In this paper, we make three contributions: 1) The concept of dynamic gateway, which acts as an interface between MANET and the Internet, is proposed. 2) The load-balancing problem is considered on the dynamic gateway for ad-hoc Internet connectivity. 3) secDSDV protocol is proposed to enhance security performance for the networks. Our simulation results show that the performance of networks with dynamic gateways is superior to that of fixed gateway architecture. Compared with DSDV, secDSDV does not affect the performance of the networks. Keyword: Dynamic Gateway, Internet, Load-balancing, Ad Hoc Network, Security.