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Study on the Sheduling Algorithm in OBS Network and the Implementation of the OBS Edge Node

Author: LiXiang
Tutor: LeZiChun
School: Zhejiang University of Technology
Course: Optical Engineering
Keywords: Optical Burst Switching Data channel scheduling Edge node Linux Kemel Module
CLC: TN929.1
Type: Master's thesis
Year: 2010
Downloads: 17
Quote: 0
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Abstract


Optical Burst Switching (OBS) is a cross between the optical circuit switching (OCS) and Optical Packet Switching (OPS) switching technology . It uses separation transmission mode of the data packet and control packet and unidirectional resource reservation protocol , thereby avoiding the network core nodes light cache device requirements ( compared with the OPS ) , and have higher bandwidth utilization ( phase with OCS ratio). The data channel scheduling algorithm for OBS networks were studied using ARM9 technology and the basic functions of the OBS edge node . Of the main work is as follows : 1. Based on the analysis of two typical data channel the scheduling algorithm LAUC algorithms and LAUC-VF algorithm proposed a new support QoS OBS data channel scheduling algorithm - H The -PPJET algorithm. The H-PPJET algorithm is a built in the modification of PPJET protocol and the LAUC-VF algorithm based on the data channel scheduling algorithm . H-PPJET the burst packet scheduling process , not only using different channels for different QoS levels burst transmission and packet loss selection process also takes into account the number of hops experienced each of the burst , packet length , and other factors . Be described in detail the flow of the the H-PPJET algorithm , gives examples of algorithms for simulation and analysis of results , and the performance of the H-PPJET algorithm . Paper through the source code of the Linux kernel to be modified to achieve the basic functions of the OBS edge node . , The paper design on the basis of the standard Ethernet frame and IP packet the OBS burst data frame and the burst structure of the control frame . And OBS edge nodes of the two main technologies: the burst assembly technology and the data channel scheduling technology , the edge node is given to the implementation of the burst assembly and a data channel scheduling process . Paper Kernel Module modified Linux kernel , and use this method to complete the IP packet information read from the Linux protocol stack . And using the Kernel Module designed and implemented OBS edge nodes of burst assembly , the basic functions of the data channel scheduling and data transmission .

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