| With the upsurge of "Back to the Moon" and the progress of technology,countries all over the world have a demand for further exploration of the moon,the number and types of lunar rovers to the Moon will increase in the future.In order to ensure the communication between lunar rover and lunar rover and between lunar rover and lander,it is necessary to establish a network between them to ensure the transmission of information.The establishment of a network base station on the lunar surface cannot solve the problem of comprehensive coverage in the short term.At the same time,there is also the problem of single point of failure.If the automatic networking mode of temporary,fast and peer-to-peer communication is chosen,it can support multiple lunar rovers to travel farther.And through multi-hop transmission,the data of each lunar roving probe equipment can be transmitted back to the lander.This thesis focuses on two aspects of reliable routing for lunar surface networking and its test and verification platform.This thesis sets up a simulation scenario on NS3 platform according to the business data(control commands,telemetry data,probe data,video data)generated by the lunar surface mission,and then compares the traditional common routing protocols AODV and OLSR.First,different evaluation metrics were selected for four different types of data,and then simulation analysis was performed according to the changes of the evaluation metrics with the number of nodes and the moving speed of nodes,and the experimental results show that OLSR protocol is more suitable for the current lunar communication requirements.This thesis analyzes the requirements of link stability and other Qo S aspects in the process of lunar rover equipment performing lunar missions.In order to improve other Qo S indicators while guaranteeing link stability,this thesis proposes a routing protocol named LSM＿OLSR(the OLSR routing protocol for lunar surface missions).LSM＿OLSR chooses a link stability metric based on received signal power,and then considers the link stability and other Qo S metrics when selecting the path,and involves them in electing MPR nodes.Finally,the LSM＿OLSR routing protocol is implemented on the NS3 simulation platform.After simulation analysis,the network established by LSM＿OLSR is more stable compared to OLSR,and the four data metrics have been improved to varying degrees.Finally,according to the business requirements of lunar mission and the characteristics of mobile ad hoc network,this thesis designs and implements the lander network management and application platform for lunar mission and the data receiving and sending function operation platform for Rover.The designed management and application platform has three main functions:(1)Global management of all nodes’ network parameter information;(2)Realize the function of sending and receiving data between nodes according to the needs of the subject;(3)Using the characteristics of multi hop transmission in mobile ad hoc network to receive the video data obtained by all nodes,and realize global supervision of video data obtained by all nodes in the network.Finally,the feasibility of the platform is verified by the physical node. |
