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Design and implementation of multi-hop video transmission experiment system in VANET

Journal of Southeast University(English Edition) 2014年第4期30卷 403-410页

作者：默罕莫德.默森许凯凯刘诚毅沈连丰东南大学移动通信国家重点实验室南京210096

Abts ract A wireless mutl i-hop videot ransmission experiment system is designed and implemented for vehiculra ad-hoc networks VANET and the rt ansm ission control protocol and routing protocol are proposed. This system in tegrates the embedded Linux system witha n ARM kernel and oc ns ists of a S3C6410 main control module a wirel ss local arean etwork WLAN card a LCD screne and so *** the scenario of a wireless multi-hop video transmission both the H.264 and JPEG are used and their performances such as the compression rate delay and frame loss rate are analyzed in theory andc ompared in the *** system is tested in the real indoor and outdoor *** results show that the scheme of the multi-hop video transmission experiment system can be applicable for VANET and multiple scenes and the transmission control protocol and routing protocol proposed can achieve real-time transmission and meet multi-hop requirements.

关键词： vehicular ad-hoc networks VANET embedded Linux multi-hop video transmission real-time property

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A real-time TCP Stream Reassembly Mechanism in High-Speed Network

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Journal of Southwest Jiaotong University(English Edition) 2009年第3期17卷 185-191页

作者：熊兵陈晓苏陈宁 School of Computer Science and Technology Huazhong University of Science and Technology

With the continual growth of the variety and complexity of network crime means, the traditional packet feature matching cannot detect all kinds of intrusion behaviors completely. It is urgent to reassemble network stream to perform packet processing at a semantic level above the network layer. This paper presents an efficient TCP stream reassembly mechanism for real-time processing of high-speed network traffic. By analyzing the characteristics of network stream in high-speed network and TCP connection establishment process, several polices for designing the reassembly mechanism are built. Then, the reassembly implementation is elaborated in accordance with the policies. Finally, the reassembly mechanism is compared with the traditional reassembly mechanism by the network traffic captured in a typical gigabit gateway. Experiment results illustrate that the reassembly mechanism is efficient and can satisfy the real-time property requirement of traffic analysis system in high-speed network.

关键词： TCP stream reassembly High-speed network real-time property Reassembly policy

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