文档介绍：上海交通大学
硕士学位论文
基于校园网的分布式计费系统的设计与实现
姓名:王玲
申请学位级别:硕士
专业:软件工程
指导教师:沈备军;沈耀
20060501
上海交通大学工程硕士研究生学位论文
基于校园网的分布式计费系统的设计与实现

摘要

传统的流量计费系统和防火墙系统大都采用在网络边界进行集中处
理的方式,面对与日俱增的吞吐量需求,这越来越成为校园网接入到互
联网的主要瓶颈。而且,在传统的网络结构中,计费系统和防火墙系统
大都采用串联方式连接,进一步加大了上述瓶颈作用。本文提出并实现
了一种整合防火墙技术的分布式计费系统(Firewall Intergrated Distributed
Billing System, FIDBS)。一方面,该系统将计费系统的转发控制和防火
墙系统的安全控制整合为统一的转发控制,并把转发控制和流量采集分
散到各个被称作“计费-防火透明网关”(Billing-Firewall Gateway,简称
B&F 网关)的模块上进行处理,提高了系统的吞吐量和可扩展性,突破
了瓶颈限制;另一方面,该系统采用集中式的监控管理,实时地控制和
管理各个计费-防火透明网关的运行情况,消除了因采用分布式转发控制
和流量采集而带来的不便,极大地提高了系统的可管理性。

关键词计费系统,校园网,防火墙,分布式,包过滤技术
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上海交通大学工程硕士研究生学位论文
DESIGN AND IMPLEM ENTATION OF
DISTRIBUTED BILLING SYSTEM BASED ON WORK

ABSTRACT

Mostly the traditional billing system and the traditional firewall work at
boundary by centralized way. This more and more es the main
bottleneck of the jointing the while it faces the increasing
demand of throughput. Furthermore,because the billing system and the
firewall are connected serially in the work structure, this
connection way further enlarges the bottleneck affects above. This article
proposes and implements a system called Firewall Integrated Distributed
Billing System (FIDBS). On the one hand,it integrates two controls of the
billing retransmission and the firewall safety into one retransmission control,
and distributes the tasks of retransmission control and flow gathering to every
modules calle administrate the operation situations of those B&F Gateways.
This not only elim d Billing-Firewall Gateway(B&F Gateway). By this means,
the throughput capacity and extensibility of the system is enhanced,the
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上海交通大学工程硕士研究生学位论文
bottleneck limit is breached too. On the other hand, it adopts an centralized
monitoring management to control and inates the inconvenientness due to
distributed retransmission control and flow accounting but also enhances the
system manageability enormously.