Tools and Assumptions

MANET is defined as a mobile ad-hoc networki which is a collection of nodes connected together over a wireless medium, which self-organize into an autonomous multi-hop wireless network. It is assumed that fixed can be included in such and architecture there by creating a hybrid of mobile and fixed network routers interconnecting wired and wireless clients that wish to subscribe to network services external and internal.

 

 

The Xwire Linux distribution is a collection of integrated services used to build a network in a simple and easy to use implmentation geared towards this objective. The routing between these ad-hoci interfaces is a proactive ad-hoc routing protocol called OLSR. Behind each ad-hoc interface is hidden a wireless and wired access interface. The network resulting from the integration of a hybrid ad-hoc network with a wired LANi is an extended LAN in which static and mobile hosts transparently communicate using traditional wired technologies or ad-hoc networking technologies.

In this architecture Xwire Linux uses a dynamic protocol for the self-configuration of the ad-hoc nodes. The ad-hoc interfaces use ZeroConf addressing1 while a DHCPi servers located at the border routers assign address to the clients attaching to the network. The wireless and wired LAN issue IPi address from a centralized location and form a single subnet across routers such that mobile (wireless) clients maintain a single IP across different routers.

The router platform is assumed to have two wireless interfaces, one for the ad-hoc self forming interface and one to allow client access. Each router is assume to have at least one wired interfaces capable of providing an uplink to the Internet , form a route, and become border router at any location.

 

 

1Zeroconf is not the ideal solution for OLSR autoconfiguration as noted in the proposal “A Simple address Autoconfiguration Mechanism for OLSR ” It is assumed that the border gateway address will not change.