Integration of Mobile-IPV6 and Olsr for Inter-Monet Communications

Trends in fourth generation (4G) wireless networks are clearly identified by the full-IP concept where all traffic (data, control, voice and video services, etc.) will be transported in IP packets. MObile NETwork (MONET) is a group of mobile nodes moving together as a unit. Such groups are common characteristics of the vehicular environments, for example train and buses (which are attractive because of the high concentration of passengers on these vehicles). This paper investigates an ad hoc networking for Inter-MONET communications and interworking between MONETs and the global Internet. We propose a hierarchical architecture: (1) integrating Mobile IPv6 and OLSR, a routing protocol for ad hoc networks, to manage universal mobility; (2) connecting this ad hoc network to Internet. The heterogeneous communication is established with the help of specific access routers, which serve as gateways. We describe the network scenario, its basic protocol architecture and we discuss the different practical approaches for routing. A flat and hierarchical ad hoc routing comparison is studied and performance differentials are analyzed through simulation results using varying network load and mobility.