Research on Cost Optimization of UAV Network Routing Protocol Based on OLSR Protocol

The HELLO message stands as the foundational and pivotal message structure within the OLSR protocol. It encompasses vital information, including neighbor types, primary addresses, and link state details concerning all neighboring nodes of the transmitting node. Its primary purpose lies in establishing the local link information base, creating 1-hop and 2-hop neighbor sets, and facilitating the calculation of node MPR sets during the phases of link awareness and neighbor discovery. Evidently, the ability of the HELLO message transmission frequency to keep pace with topology changes profoundly influences the protocol's communication performance. A strategic reduction in the frequency of HELLO message transmission is a means of alleviating routing control overhead. Hence, the crux of the matter becomes the adaptive adjustment of HELLO message transmission intervals in response to topology alterations. This challenge takes center stage in addressing the issue. In this study, by leveraging the comprehensive neighbor node data within the node's local link information base and considering pertinent changes in network topology—such as topology establishment, shifts in link symmetry status, and link disruptions—the methodology involves monitoring shifts in the node's local link information base. This approach, in turn, achieves an automated fine-tuning of the HELLO message transmission interval. Ultimately, the approach is subjected to testing, validation, and analysis using UAVs.