Delay Optimization of Center Network Cache and Performance Simulation of On-chip Network Communication

Abstract

In order to solve the adjacent nodes repeat cache of content centric networking (CCN), this paper proposes new caching strategy based on the sojourn time (ST), and designs cooperative caching mechanism for CCN. The mechanism uses the basketball training content name as routing and uses content name to addressing, no depended on IP, with unstructured routing mode. Through the data cache simulation of single point shooting and pressing jump shooting, it can be found ST caching strategies consider the overall content and user access to content and it obtains better cache hit rate. In the two strategies of ST and ALWAYS, ST strategy gets greater delivery and reduces the delivery time, making the average delay minimum and getting the best performance. Introduction With the rapid development of internet technology and user increasing, many problems exist in the internet architecture of TCP/IP are also obvious, demonstrating low safety controllability, poor scalability and mobility, and service quality can’t be guaranteed and other problems [1, 2]. Through the teaching process visualization display, athletes can inquiry learning to break the traditional mode of the original acceptance training, making the education teaching is from closed to open. At the same time, this makes the education training by the production talents into individualized teaching mode, and it has an important role in cultivating the students' thinking way and creative thinking, which is a subversion of the traditional education [3]. So the domestic and foreign academic circles launched a comprehensive study of the future network architecture, changing from host centered to the content as the center, and the most concern future network architecture is CCN [4,5]. After the basic idea has been proposed, many people have put forward a series of research hot spots, such as safety, content routing, congestion control and network cache, especially the research on caching mechanism in CCN network is seen as the most critical research object by the academic circles, getting extensive attentions. Fig.1: Schematic diagram of the basketball training project CCN cache strategy As shown in Figure 1, the bigger of ST cache strategy buffer capacity, the greater of ST value in the cache strategy contents; the higher of the content popularity, the greater of ST value [6]. International Conference on Automation, Mechanical Control and Computational Engineering (AMCCE 2015) © 2015. The authors Published by Atlantis Press 876 Obviously, by comparing the sojourn time of contents in the adjacent cache register, when the sojourn time is longer, the node can effectively reduce the number of content copies, which will increase the diversity of the AS domain. Design of CNN Caching Strategy Algorithm based on ST In CCN, the training content is divided into same size module, and module names are unique, which are permanently stored in one or more servers. CCN data transmission mainly uses interested packets and data packets to complete. Through the cache strategy the user sends interest packet. The routing protocol based on the name ensures that the requested routing is sent to the appropriate register, and each intermediate node will be tracking the missing node request, so the requested data is backtrack to the recipient and let the passing nodes cache data [7,8]. The membership function of node cache can be expressed as: m M m y y P − − = ) ( . (1) Among them, M denotes the maximum node cache, m is the minimum node cache. Node cache sequence can be written as: 2 1 , }, { C m C K m M − < < − . (2) Among them, 1 C and 2 C are cache nodes. Cache data of nodes } { 1 m C and } { 2 m C is computed according to the following formula: )] ( 2 1 [ ], 2 1 [ ] 2 1 [ ], 2 1 [ ,... 2 , 1 ) 1 ( 2 2 2 ) 1 ( 2 ) 1 ( 1 1 1 ) 1 ( 1