A Duplicate Address Detection and Autoconfiguration Mechanism for a Single-Interface OLSR Network

Abstract

Mobile Ad hoc NETworks (MANETs) are infrastructure-free, highly dynamic wireless networks, where central administration or configuration by the user is very difficult. In hardwired networks nodes usually rely on a centralized server and use a dynamic host configuration protocol, like DHCP [7], to acquire an IP address. Such a solution cannot be deployed in MANETs due to the unavailability of any centralized DHCP server. For small scale MANETs, it may be possible to allocate free IP addresses manually. However, the procedure becomes impractical for a large-scale or open system where mobile nodes are free to join and leave. Numerous dynamic addressing schemes for ad hoc networks have been proposed. These approaches differ in a wide range of aspects, such as the usage of centralized servers or full decentralization, hierarchical structure or flat network organization, and explicit or implicit duplicate address detection. In [1] we have proposed an autoconfiguration solution for OLSR, which can detect and resolve only a single address duplication in the network. In this paper, however, we will present a complete and optimized version of the autoconfiguration solution for OLSR proposed in [1]. This solution detects and resolve duplications whatever the number of address conflicts in the network, and, as in [1], it is based on an efficient Duplicate Address Detection(DAD) algorithm which takes advantage of the genuine optimization of the OLSR routing protocol [3].