Research On The Key Technology Of Data Transmission In The Smart And Cooperative Networks

With the rapid expansion of the Internet scale,the Internet services are scaling into every corner of people's lives.The Internet have been implemented in various of highinterference and high-dynamic scenarios.Meanwhile,the corresponding data transmission mechanisms face tough challenges.In recent years,the proposals of new network architectures such as the Information-centric Networking(ICN),the Softwaredefined Networks(SDN),and the Smart Identifier NETwork(SINET)have brought significant benefits such as mobility,security,and resource allocation flexibility.Therefore,data transmission mechanisms should be adapted to more complex network environments,while also should fulfill higher Quality of Service(Qo S)requirements.Based on the comprehensive researches and analysis of the SINET architecture,this paper conduct research on the following three issues.First,the existing end-to-end data transmission mechanisms(e.g.TCP)suffer performance degradations in highinterference mobile network environments.It is difficult to provide stable,reliable,and efficient data transmission services in such environments.Although the hop-by-hop transmission mechanisms(e.g.LTP)can alleviate the interference impact on transmission throughput,it has disadvantage on significant end-to-end latency.Second,the existing hop-by-hop transmission mechanisms are defenseless to the newly emerged link flooding attacks(LFA).In the high-dynamic mobile network environments,LFA can achieve higher damage.Third,the current transmission mechanisms are relatively static.There is usually only one reliable transmission mechanism designed for a particular network protocol stack.Such design is not able to adapt to the high-interference and high-dynamic network environments containing complex and heterogeneous links.And it is also difficult to fulfill the high Qo S requirements.In order to solve the above problems,the researches and innovations of this paper are as follows:1.For the first question,a data transmission mechanism,HF-TP is proposed.HF-TP has high bandwidth utilization and low end-to-end latency in the high-interference network environments.The core design of HF-TP is to achieve hop-by-hop packet-level retransmission by utilizing the on-path cache of SINET.In the high-interference network environments,HF-TP has strong adaptability.In this paper,the namespace,the reliability control mechanism and the congestion control mechanism are designed for HF-TP.With compatible test on the SINET real prototype,it is proved that HF-TP achieves the design goal.Further more,HF-TP has significant bandwidth fairness and low cache consumption.2.For the second question,two link-flooding attack(LFA)defense mechanisms,LFA-AD/ LFA-PD are proposed for the high-dynamic network environments.The core design of LFA-AD/ LFA-PD is utilizing the central control ability of SINET to realize large-scale traffic behavior recording.The behavior records before and after the attack can be analyzed to distinguish and filter the attack traffic from the legitimate background traffic.The algorithm of LFA-AD/ LFA-PD is present and evaluated on the LFA simulations built by the SINET prototype system.The evaluation results show that the above two mechanisms can effectively mitigate the LFA attack traffic.3.For the third question,a bandwidth fairness enhancement mechanism in parallel heterogeneous services,HFo IP,and a joint reliable transmission strategy in complex network scenarios,JR-TS are proposed to achieve data transmission across highinterference and high-dynamic network environments.The core design of HFo IP is implementing HF-TP on IP networks to provide higher bandwidth utilization and more efficient bandwidth allocation method in the mobile edge computing(MEC)senario.The core design of JR-TS is utilizing the central control ability of SINET to dynamically sense link environment changes and allocate the appropriate transport mechanism for each network area.Further more,JR-TS provides lightweight interconnection and switching among the multiple chosen transport mechanisms in order to achieve large scale data transmission.This paper presents the detail design of HFo IP and JR-TS,and develops the MEC simulation topology and the Internet of Vehicle(Io V)simulation platform.The evaluation on the MEC simulation topology shows that HFo IP can effectively solve the bandwidth fariness problem in MEC network.And the evaluation on the Io V platform shows that JR-TS can achieve better transport performance than any single transport mechanism.What's more,JR-TS has the dynamics to decide better trade-offs between the performance and the consumptions.