| Wireless multi-hop network (or wireless ad hoc network) has been applied widely in the field of military and terrorism for its flexibility. Due to the limited bandwidth, dynamic topology and the heterogeneity of processing and communication protocol among the nodes, the traditional Internet management system cannot be used in the heterogenous multi-hop wireless network directly. Therefore, the wireless multi-hop network management faces new challenges.This thesis designs a distributed network management system based on SNMP for the heterogeneous wireless multi-hop network, including configuration management, performance management and fault management. According to the characteristics of heterogeneous wireless multi-hop networks, the system is compatible with SNMP protocol and extends the MIB database, so that it can support custom configuration for wireless nodes. Using the cross layer technology, the system can collect underlying information and topology information of wireless nodes. This thesis presents an adaptive visualization algorithm named Spring Algorithm for the topology management, which can control and adjust the layout of the network topology, so that the whole topology is decentralized and clearly displayed on the screen. In addition, an adaptive fault detection algorithm, AFD, is proposed, which considers both the actual reqirements and the features of wireless multi-hop networks. In order to evaluate the fault detection algorithm, two performance metrics are also proposed.This thesis implements the distributed heterogeneous wireless multi-hop network management system at our test-bed. Experiments are carried out to evaluate the performance of the system. The experiment results verify the functionalities of each components of the system, and show that the distributed network management system works well in the heterogeneous wireless multi-hop network. |
