On Scalability and Mobility Management of Hierarchical Large-Scale Ad Hoc Networks

Abstract

Abstract.With the increased interest in the mobile wireless communication, the development of large-scale ad hoc networks has drawn a lot of attention and the scalability of ad hoc networks has been the subject of extensive research. The ad hoc network topology changes frequently and unpredictably, and mobility become extremely challenging in the circumstance. So, the broadcast storm becomes a very serious problem to migrate into such networks for the applications of group communications. The main concept of virtual subnet technology is the capability to group users into broadcast domains, which divides a virtual subnet into logic, instead of physical, segments and reduces the traffic overhead. With this characteristic, we propose an interoperability network model integrating self-organizing ad hoc networks and the Internet/a conventional network with the partition of physical/virtual subnets. Moreover, we describe a protocol to establish the virtual broadcast domains by using the IPv6 addressing concept in ad hoc networks and perform IP-based network communications in a multi-switch backbone. The hierarchical networks, physical/virtual subnets, addressing method and mobility management are described, and some performance issues are evaluated.

Reliable Transporting and Optimal Routing on Rate-Based for Ad Hoc Networks

“…A communication session is achieved either through single-hop transmission if the recipient is within the transmission range of the source node, or by relaying through intermediate nodes otherwise. For this reason, ad hoc networks are also called multihop packet radio networks [12]. Those characteristics differentiate them from traditional computer networks including lack of infrastructures, mobility, shared channel, and limited bandwidth and, hence, the conventional layered OSI model applied in such circumstance suffers from varying channel and network conditions.…”