Research On Self-Organizing Multi-Hop Communication Technology Based On Virtual Backbone Network And Physical Layer Group Key

With the continuous advancement of communication technology,the self-organizing network has emerged as a crucial supplementary alternative to conventional networks in catering to the communication requirements of specialized settings.This data transmission system comprises of peer-to-peer communication nodes and does not require any control center equipment.Its vast application potential is evident in both military and civilian domains.The characteristics of SON include fast deployment,open channel accessibility,more jumps,weak node computing capabilities,but it also faces issues such as routing complexity and susceptibility to illegal eavesdropping.Traditional routing protocols and asymmetric encryption transmission technology that rely on computing complexity are challenging to apply directly to SON.For the characteristics of the SON,this thesis has thoroughly studied the self-organized multi-jump communication technology based on the key network and the physical group key.The main content and innovation points are as follows:First of all,to address the issue of radio storm strategies in traditional plane flood-type routing strategies,a virtual backbone network establishment and routing method based on clustered connectivity has been proposed.This method aims to establish a virtual backbone network by forming network clusters and connecting neighboring clusters,and developing a layered routing strategy based on this network.By reducing the number of nodes that undertake the route function,this method is expected to alleviate the radio storm problem in network routing.Additionally,this method comprehensively considers the node’s connection and energy indicators,giving priority to selecting nodes with higher connection and more remaining energy to become backbone nodes.Simulation results demonstrate that this method effectively reduces the size of the virtual backbone network and energy consumption in its establishment.The second study involved a wireless communication system composed of multiple communication nodes,each with limited computing power.To address the security issues associated with wireless SON transmission and limited node computing capabilities,a key generation method for the physical layer group for transmission and communication business has been proposed.This method involves selecting the central node and using wireless channel timing and interpretation to dynamically generate multiple groups of physical layers for the key,utilizing channel estimation and error correction coding technology.Furthermore,the central node generates the key based on the characteristics of the wireless channel,builds a model based on the group’s key,physical layer-to-key,and one-way dissipation function,calculates the polynomial coefficient and broadcasts it to all member nodes to ensure that only authorized users can obtain a key.Simulation results show that the overall related coefficient of Pilson is 0.1816,effectively ensuring the randomness of the group key and improving the transmission of the SON.Finally,a self-organized multi-jump communication system based on the USRP was established by combining the aforementioned virtual backbone network and the key generation method for the physical layer group.The system includes an eavesdropping node and is suitable for multi-jump application scenarios.The USRP devices and Lab View software development environment were employed to achieve independent chain,multi-jump,broadcast,key generation,and data encryption functions.Operating data analysis of the demonstration system shows that the eavesdropping node cannot obtain the correct data packet.The average time required for a one-way single-hop communication chain to build is 7.7 seconds,while the average time required for a one-way two-hop communication chain to build is 16.5 seconds.Furthermore,the system enables broadcast communication and data transmission encryption.