Design And Implementation Of A Header Compression Mechanism In Multi-hop Cross-network Scenario

With the increasing innovation of the Internet of Things(IoT)technology,how to realize the efficient transmission of data inside and outside the Internet of Things,improve the network efficiency of the Internet of Things and reduce the transmission loss of nodes is of great significance for improving the overall performance of the Internet of Things.As the interconnection between IoT networks becomes more frequent,the requirements for low-cost multi-node forwarding and highstability cross-segment communication pose new challenges to existing technologies.Under the new multi-hop and cross-network transmission requirements,the high-overhead multi-hop routing forwarding and unstable cross-segment header compression in the traditional Internet of Things technology make the application of Internet of Things technology limited by transmission scenarios and stability.In view of the above problems,this thesis proposes a header compression mechanism based on TLV(Type-Len-Value)header format and variable length address structure according to the characteristics and requirements of multi-hop cross-network transmission in real scenarios.The new compression mechanism solves the problem of unstable compression effect of traditional IoT message compressors when transmitting across network segments through a variable-length address structure independent of the IPv4/IPv6 system.At the same time,the new compression mechanism also ensures the transmission efficiency of multihop transmission scenarios by dynamically constructing a low-energy multi-hop forwarding and routing network.The main research contents of this thesis include two aspects.First,this thesis proposes a new compression mechanism,which includes an address format based on variable length address structure and a header format based on TLV.The two formats provide a flexible combination of variable-length address format and header structure,which enables the new compression mechanism to have good stability and compression effects in cross-network segment transmission scenarios.Secondly,this thesis designs and implements the routing mechanism corresponding to the header compression mechanism.The routing mechanism realizes the routing function based on the upstream and downstream traffic channels,and establishes a network routing system around the edge gateway to support the dynamic network access of new nodes,route maintenance and network addressing.The routing mechanism can select the optimal transmission channel and parent node for new network nodes through weight score calculation and shortest path strategy.At the same time,the network can perform unified resource scheduling and cross-network interaction functions through edge gateway nodes to realize real-time monitoring of network conditions and effective data transmission.The experimental results show that the new compression mechanism can effectively improve the effect of address compression and realize the ability to flexibly combine headers,and can flexibly construct an effective and low-cost routing system according to forwarding requirements.