Design And Application Study Of Caching Mechanism In Information-Centric Networking

As a future network architecture,information-centric networking(ICN)has received continuous attention from academia and industry in recent years.ICN provides a new way for the design of the Internet of Things,mobile ad hoc networks(MANETs)and vehicular networks(VN),etc.,and it would be used to address the difficulties these networks face when building communication solutions using the TCP/IP suits.Although ICN has been proposed for nearly a decade,it is still in the theoretical research and design phase,and there are many academic and engineering issues that need to be resolved.The caching mechanism is at the core of ICN.This mechanism provides a duplicate of data for consumers through a ubiquitous node cache for data reuse and request aggregation,which can reduce data request delay,improve network throughput,and save network bandwidth,etc.An efficient and reliable caching mechanism that maximizes cache efficiency is the key to apply the ICN architecture to existing networks,and it is also a key to construct a communication solution.In this dissertation,we studied some key problems on the ICN caching performance,security,and application.The contents and contributions of our works are as follows:(1)We proposed a lightweight non-collaborative cache allocation approach(IFDD).Based on the analysis of popularity-based cache strategies in terms of interest distribution,caching efficiency and caching security,we designed a method to combine the popularity and the locality to calculate the content caching fitness for making caching decision.IFDD could not only enhance caching performance but also defend against pollution attacks,and it also generates low communication overhead(due to non-collaboration)and computational overhead.Extensive simulation results on ndnSIM platform demonstrated the capability of the proposed approach in improving cache allocation performance while reducing the impact of pollution attacks.(2)We proposed a scheme(ICDCS)based on interest/content tag analyzing.We analyzed the dilemma of ICN design in name design and utilization,and then pointed out the problems of traditional caching design in interest correlation and content popularity measurement.We designed a method to enhance the node awareness and processing data by using the tagging mechanism and designed a statistical analysis method based on counting bloom filter.Based on this method,we designed and implemented an on-path caching strategy(ICDCS)which can aware the characteristics of the content in the application layer and predict of the interesting trend.Simulations over various system parameters were done to validate the effectiveness and efficiency of ICDCS,results proved that ICDCS has better cache performance than pure popularity-based strategies in the scenario of multi-application mixed data:flow.(3)We proposed a method for statistical analysis of interest distribution using the fog computing and tagging technology in the information-centric vehicular networks(ICVN),and proposed content dissemination and caching scheme(DCRV)in ICVN.We analyzed the premise and conditions of mechanism designing in ICVN and discussed the feasibility and necessity of using fog computing technology to realize metadata-based perception.We designed a basic service FIAS that provides interest analysis for ICVN mechanism design in order to simplify the design of content distribution for mechanisms such as caching and content dissemination.In order to verify the effectiveness of FIAS,we implemented a FIRS-based content caching and distribution framework(DCRV).Simulations were carried out to validate the effectiveness of our design in improving ICVN performance.The studies in this dissertation will provide guidance for the integration of network caching design in performance design and security.The proposed tag-aware design idea is expected to provide solutions for the difficulties of ICN in name design,routing design,cache design,etc.The proposed fog computing-based communication solution can provide guidance for constructing ICVN communication schemes.The proposed scheme has its uniqueness to specific scenarios and a certain universal type,and it would provide reference for the fusion design of ICN technology,fog computing technology,and content aware technology in mobile scenes.