Research And Implementation Of Adaptive And Reliable Information Distribution Protocol In MANET Networks

The MANET network does not require any support from the network infrastructure,the network is very fast,convenient,and flexible to deploy,which makes it widely used in many fields such as military communications and civilian domain.The information distribution protocol is the basis and key of the MANET network,and there are many challenges in realizing reliable information distribution.This paper first studies the SMF protocol,implements the MPR information distribution method,and proposes an adaptive information distribution selection mechanism based on the SMF protocol.Then it studies the Trickle mechanism,and implements a highly reliable information distribution protocol with adaptive parameter adjustment based on the Trickle mechanism.Finally,the functionality and performance of the protocol were tested on the Linux platform.First,this paper analyzes the operating mechanism of SMF protocol,and studies the distribution of information such as classic flooding,multi-point relay and connected dominating set.Then,based on the SMF protocol and combined with OLSR protocol,MPR information distribution is realized.According to the SMF protocol,an adaptive information distribution selection mechanism is proposed,that is,according to the density of network nodes,the information distribution method of the SMF protocol is adaptively selected.When the network nodes are sparse,CF is used to distribute information.When the network nodes are dense,MPR is selected to distribute information.Experimental results show that the SMF protocol can distribute information efficiently,but it cannot guarantee the reliable distribution of information.Secondly,in order to realize the highly reliable distribution of information,this paper deeply studies the Trickle mechanism,which can ensure the consistency of information transmission and maintain a balance between transmission reliability and transmission efficiency.Based on the Trickle mechanism,a highly reliable information distribution protocol(TRIDP)for MANET networks is designed.This protocol uses the Trickle mechanism to detect the inconsistency of information between nodes,and uses the locally cached information to forward data lost by neighboring nodes,thereby ensuring that the distribution of information is highly reliable.Then,based on the redundancy constant parameters of TRIDP protocol,an adaptive parameter adjustment mechanism is proposed.That is,the redundancy constant of the protocol are adaptively adjusted according to the neighboring degrees of the network nodes,and the nodes with high neighboring degrees have relatively higher value of redundancy constant.the node with a low degree of neighboring set a relatively low value of the redundant constant,to ensure the load balance of each node in the network.Finally,Implemented the highly reliable information distribution protocol designed in this paper based on Linux platform.A wireless multi-hop network experiment platform was built to verify the SMP protocol and TRIDP protocol information distribution function.Different network experiment scenarios were designed,and the protocol throughput and delivery rate were tested and analyzed.The experimental results showed that TRIDP protocol can guarantee extremely high end-to-end delivery rate and realize highly reliable distribution of information.