电子海图数据多平台共享服务器的设计与实现
摘要
电子海图及其应用系统的开发与应用是当代航海领域研究的热点问题。电子海图数据服务系统为船舶航行、操纵等活动提供必要的支持和保障,并为客户群提供海图数据搜索、查询和下载等功能,向多平台电子海图系统客户端同时提供数据共享服务。电子海图数据服务器作为应用系统的重要组成部分,成为对内、对外连接的桥梁。本文以电子海图数据服务系统作为工程背景,完成了电子海图信息通信系统的设计与实现。
本文对电子海图数据服务系统的需求加以分析,完成方案设计、功能模块设计和可靠性设计,并对各个模块的实现作了详细阐述。使用并发的C/S模式,利用SOCKET套接字技术,将IP组播和单播通信技术应用到基于Linux的并发服务器上,解决多终端同时访问服务器造成信息堵塞的问题。通过使用二值信号量互斥控制功能,保护网络信息可靠的传输给信息处理装置,解决了信息传输的可靠性问题。利用成熟的网络TCP/IP技术,实现在跨Linux和VxWorks多平台上数据共享的服务,从而解决海图资源分散性问题。分析电子海图索引十字链表结构,通过区域和比例尺选择,完成电子海图数据的快速检索功能。
最后,模拟电子海图数据服务系统的工作环境,组建了具有多个客户端的电子海图综合通信系统网,并对整个通信系统进行测试。在对TCP/IP协议栈分析之后,定位UDP的丢包位置,分析丢包原因并给出解决方案。测试结果表明,电子海图数据服务系统设计合理,运行良好,满足了电子海图数据服务系统的信息支持和保障的要求。
The development and application of electronic chart and its applicable system are hot issues for modern navigation field. By the data service system of electronic chart, necessary support and guarantee for activities like ship sail and control etc are provided. And the functions like chart data search, query and download etc for client group are guaranteed also. Meanwhile, it provides data share service to multi-platform electronic chart system client ends. As an important component of application system, electronic chart data server is considered as the bridge linking inside and outside. Taking electronic chart data service system as engineering background, the design and realization of electronic chart information communication system are accomplished.
The demands of electronic chart data service system are analyzed, and the designs of project, function module and reliability are also accomplished. The realization of various modules is explained in detail. Apply IP unicast and multicast communication technology into concurrent server based on Linux by concurrent C/S pattern and SOCKET technology. This theory can solve the information block problem caused by multiple ends visiting server simultaneously. Guarantee the reliable transmission between internet information and information processing devices to solve the reliable issues about information transmission. Use the mature internet TCP/IP technology to realize the data share service based on multi-platform cross Linux and VxWorks. The problem of scattering chart resources is solved. By analyzing cross chain table structure of electronic chart index, the quick search function to data of electronic chart by selecting area and scale is accomplished.
Finally, the working environment of electronic chart data service system is simulated and the integrated communication system network of electronic chart with multiple client ends is established. The test to the whole communication system is also accomplished. After analyzing the TCP/IP agreement, the pack loss position and the reason of pack loss are detected. And the solution is given. The test results indicate that the electronic chart data service system with reasonable design and good function meets the demands of information support and guarantee of the electronic chart data service system.
本文对电子海图数据服务系统的需求加以分析,完成方案设计、功能模块设计和可靠性设计,并对各个模块的实现作了详细阐述。使用并发的C/S模式,利用SOCKET套接字技术,将IP组播和单播通信技术应用到基于Linux的并发服务器上,解决多终端同时访问服务器造成信息堵塞的问题。通过使用二值信号量互斥控制功能,保护网络信息可靠的传输给信息处理装置,解决了信息传输的可靠性问题。利用成熟的网络TCP/IP技术,实现在跨Linux和VxWorks多平台上数据共享的服务,从而解决海图资源分散性问题。分析电子海图索引十字链表结构,通过区域和比例尺选择,完成电子海图数据的快速检索功能。
最后,模拟电子海图数据服务系统的工作环境,组建了具有多个客户端的电子海图综合通信系统网,并对整个通信系统进行测试。在对TCP/IP协议栈分析之后,定位UDP的丢包位置,分析丢包原因并给出解决方案。测试结果表明,电子海图数据服务系统设计合理,运行良好,满足了电子海图数据服务系统的信息支持和保障的要求。
The development and application of electronic chart and its applicable system are hot issues for modern navigation field. By the data service system of electronic chart, necessary support and guarantee for activities like ship sail and control etc are provided. And the functions like chart data search, query and download etc for client group are guaranteed also. Meanwhile, it provides data share service to multi-platform electronic chart system client ends. As an important component of application system, electronic chart data server is considered as the bridge linking inside and outside. Taking electronic chart data service system as engineering background, the design and realization of electronic chart information communication system are accomplished.
The demands of electronic chart data service system are analyzed, and the designs of project, function module and reliability are also accomplished. The realization of various modules is explained in detail. Apply IP unicast and multicast communication technology into concurrent server based on Linux by concurrent C/S pattern and SOCKET technology. This theory can solve the information block problem caused by multiple ends visiting server simultaneously. Guarantee the reliable transmission between internet information and information processing devices to solve the reliable issues about information transmission. Use the mature internet TCP/IP technology to realize the data share service based on multi-platform cross Linux and VxWorks. The problem of scattering chart resources is solved. By analyzing cross chain table structure of electronic chart index, the quick search function to data of electronic chart by selecting area and scale is accomplished.
Finally, the working environment of electronic chart data service system is simulated and the integrated communication system network of electronic chart with multiple client ends is established. The test to the whole communication system is also accomplished. After analyzing the TCP/IP agreement, the pack loss position and the reason of pack loss are detected. And the solution is given. The test results indicate that the electronic chart data service system with reasonable design and good function meets the demands of information support and guarantee of the electronic chart data service system.
引文
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[2]W Richard Steven.TCP/IP详解卷1:协议[M].机械工业出版社,1993:33-38页
[3]COMER DOUGLSS E.用TCP/IP进行网际互连—TCP/IP详解,卷1::协议[M].电子工业出版社,1998:27-30页
[4]DOUGLAS E.COMER,DAVID L.STEVENS.用TCP/IP进行网际互连第2卷:设计实现和内部构成[M].电子工业出版社,1998:160-260页
[5]Warren W.Gay著,詹俊鹄,于卫译.实战Linux Socket编程[M].西安电子科技大学出版社,2002
[6]郭勇.利用Socket开发客户/服务器应用.广西师范大学学报(自然科学版),2000:24-27页
[7]乔长林.基于IP组播技术的流式媒体应用.四川大学硕士论文,2002.4
[8]张军.一种基于C/S模式的TCP通信程序在Vxworks中设计与实现.微计算机信息,2006:75-76页
[9]周启平,张扬编著.VxWorks下设备驱动程序及BSP开发指南[M].中国电力出版社,2004:11-13页
[10]W.Richard Stevens,杨继张译.UNIX网络编程(第一卷):套接口API 和X/Open传输接口API..清华大学出版社,2000.12
[11]刘利强,戴运桃,周卫东.基于VxWorks的双端口网卡智能双冗余驱动.电子技术应用,2006.7:64-66页
[12]梁立哲,时武略.TCP/IP跨平台通信的研究.电脑知识与技术,2006.3:64-66页
[13]张学海.基于多协议、多系统间网络通信的研究与实现.哈尔滨工程大学硕士论文,2004.2
[14]张斌,高波.Linux网络编程.清华大学出版社,2001
[15]范永开,杨爱林编著.Linux应用开发祥解.人民邮电出版社,2006
[16]Beau Williamson.IP组播网络设计开发(第一卷).电子工业出版社,2000.6
[17]C.Perdins."IPv4 Mobility Support",RFC 2002,IETF,October,1996
[18]吴海昕.IP组播通信及其在VxWorks操作系统上的实现[J].计算机与数字工程,2003,31卷(5):17-20页
[19]孔祥营,柏桂枝编著.嵌入式实时操作系统VxWorks及其开发环境Tornado.中国电力出版社,2002.1:2-13页
[20]严蔚敏,吴伟民编著.数据结构.清华大学出版社,2003
[21]邝坚主编.Tornado/Vxworks入门与提高[M].科学出版社,2004:5-18页
[22]周启平,张扬编著.VxWorks程序员速查手册[M].机械工业出版社,2005
[23]J.F.Adam,H.H.Houh,and etal.A Network Architenture for Distributed Multimedia System,IEEE 1994
[24]董庆阳,谢峰等.IP组播技术.数据通信[M].1998.3:5-9页
[25]Christian Huitema.Ipv6:the New Internet Protocol(second edition),May,1999
[26]李玉波,朱自强,郭军.Linux C编程.清华大学出版社,2005
[27]Douglas Comer,David I Stevens.TCP/IP网络互联技术(卷三):客户—服务器编程与应用[M].清华大学出版社,2004
[28]DOUGLAS E.COMER著.Computer Networks and Internets.电子工业出版社,1998
[29]谢希仁编著.计算机网络(第三版).大连理工出版社,2000
[30]Andrew S.Tanenbaum.COMPUTER NETWORKS(THIRD EDITION).清华大学出版社,1998
[31]王廷尧等编著.以太网技术与应用.人民邮电出版社,2004
[32]李腊元著.计算机局域网络理论与技术.国防工业出版社,1997
[33]林锐,韩永泉著.高质量程序设计指南—C++/C语言.电子工业出版社,2003
[34]罗国庆 等编著.VxWorks与嵌入式软件开发.机械工业出版社,2003
[35]邱世华著.Linux操作系统之奥秘.电子工业出版社,2008
[36]Bryan Pfaffenberger著,智慧东方工作室译.Linux连网详解.机械工业出版社,2002
[37]李国厚,赵明富.嵌入式系统的网络通信技术.微计算机信息,2005,21(72):54-55页
[38]任松涛,陈雪峰.ECDIS的功能与应用.广州航海高等专科学校学报,2003,13卷(1):15-17页
[39]胡影,蒋年德.TCP/IP协议栈在Linux与FreeBSD中的实现分析.微型电脑应用.2006:60-64页
[40]高翊宇,马林华,南秦博.基于Linux操作系统下的TCP/IP网络通信研究与应用.现代电子技术,2006:74-76页
[41]余先涛,张俊峰,莫易敏.嵌入式TCP/IP协议在网络通信中的应用.武汉理工大学学报,2004:8-20页
[42]高鹏飞,李新明,孙建.Linux与VxWorks任务调度机制分析.工业控制计算机,2005:30-32页
[43]毛战华,王金刚,丁大尉.基于VxWorks和Windows跨平台通讯.电子测量技术,2004.3:54-56页
[44]李峰,应宏,张军.利用TCP/IP实现Windows与Vxworks的通信.微计算机信息,2006.2:80-83页
[45]Wind River著,王金刚,宫霄霖,熊辉译.VxWorks网络程序员指南.清华大学出版社,2003
[46]徐铁.电子海图数据库及其索引技术研究.上海海运学院硕士论文,2003.12
[47]吴应佳.基于Linux系统下的WEB服务器安全探讨.网络天地,2007.7:24-26页
[48]刘杰.构建基于Linux服务器的网络安全平台.技术研究与应用,2007.5:66-68页
[49]王金刚,宫霄霖等编著.基于VxWorks嵌入式实时操作系统设计.清华大学出版社,2004
[2]W Richard Steven.TCP/IP详解卷1:协议[M].机械工业出版社,1993:33-38页
[3]COMER DOUGLSS E.用TCP/IP进行网际互连—TCP/IP详解,卷1::协议[M].电子工业出版社,1998:27-30页
[4]DOUGLAS E.COMER,DAVID L.STEVENS.用TCP/IP进行网际互连第2卷:设计实现和内部构成[M].电子工业出版社,1998:160-260页
[5]Warren W.Gay著,詹俊鹄,于卫译.实战Linux Socket编程[M].西安电子科技大学出版社,2002
[6]郭勇.利用Socket开发客户/服务器应用.广西师范大学学报(自然科学版),2000:24-27页
[7]乔长林.基于IP组播技术的流式媒体应用.四川大学硕士论文,2002.4
[8]张军.一种基于C/S模式的TCP通信程序在Vxworks中设计与实现.微计算机信息,2006:75-76页
[9]周启平,张扬编著.VxWorks下设备驱动程序及BSP开发指南[M].中国电力出版社,2004:11-13页
[10]W.Richard Stevens,杨继张译.UNIX网络编程(第一卷):套接口API 和X/Open传输接口API..清华大学出版社,2000.12
[11]刘利强,戴运桃,周卫东.基于VxWorks的双端口网卡智能双冗余驱动.电子技术应用,2006.7:64-66页
[12]梁立哲,时武略.TCP/IP跨平台通信的研究.电脑知识与技术,2006.3:64-66页
[13]张学海.基于多协议、多系统间网络通信的研究与实现.哈尔滨工程大学硕士论文,2004.2
[14]张斌,高波.Linux网络编程.清华大学出版社,2001
[15]范永开,杨爱林编著.Linux应用开发祥解.人民邮电出版社,2006
[16]Beau Williamson.IP组播网络设计开发(第一卷).电子工业出版社,2000.6
[17]C.Perdins."IPv4 Mobility Support",RFC 2002,IETF,October,1996
[18]吴海昕.IP组播通信及其在VxWorks操作系统上的实现[J].计算机与数字工程,2003,31卷(5):17-20页
[19]孔祥营,柏桂枝编著.嵌入式实时操作系统VxWorks及其开发环境Tornado.中国电力出版社,2002.1:2-13页
[20]严蔚敏,吴伟民编著.数据结构.清华大学出版社,2003
[21]邝坚主编.Tornado/Vxworks入门与提高[M].科学出版社,2004:5-18页
[22]周启平,张扬编著.VxWorks程序员速查手册[M].机械工业出版社,2005
[23]J.F.Adam,H.H.Houh,and etal.A Network Architenture for Distributed Multimedia System,IEEE 1994
[24]董庆阳,谢峰等.IP组播技术.数据通信[M].1998.3:5-9页
[25]Christian Huitema.Ipv6:the New Internet Protocol(second edition),May,1999
[26]李玉波,朱自强,郭军.Linux C编程.清华大学出版社,2005
[27]Douglas Comer,David I Stevens.TCP/IP网络互联技术(卷三):客户—服务器编程与应用[M].清华大学出版社,2004
[28]DOUGLAS E.COMER著.Computer Networks and Internets.电子工业出版社,1998
[29]谢希仁编著.计算机网络(第三版).大连理工出版社,2000
[30]Andrew S.Tanenbaum.COMPUTER NETWORKS(THIRD EDITION).清华大学出版社,1998
[31]王廷尧等编著.以太网技术与应用.人民邮电出版社,2004
[32]李腊元著.计算机局域网络理论与技术.国防工业出版社,1997
[33]林锐,韩永泉著.高质量程序设计指南—C++/C语言.电子工业出版社,2003
[34]罗国庆 等编著.VxWorks与嵌入式软件开发.机械工业出版社,2003
[35]邱世华著.Linux操作系统之奥秘.电子工业出版社,2008
[36]Bryan Pfaffenberger著,智慧东方工作室译.Linux连网详解.机械工业出版社,2002
[37]李国厚,赵明富.嵌入式系统的网络通信技术.微计算机信息,2005,21(72):54-55页
[38]任松涛,陈雪峰.ECDIS的功能与应用.广州航海高等专科学校学报,2003,13卷(1):15-17页
[39]胡影,蒋年德.TCP/IP协议栈在Linux与FreeBSD中的实现分析.微型电脑应用.2006:60-64页
[40]高翊宇,马林华,南秦博.基于Linux操作系统下的TCP/IP网络通信研究与应用.现代电子技术,2006:74-76页
[41]余先涛,张俊峰,莫易敏.嵌入式TCP/IP协议在网络通信中的应用.武汉理工大学学报,2004:8-20页
[42]高鹏飞,李新明,孙建.Linux与VxWorks任务调度机制分析.工业控制计算机,2005:30-32页
[43]毛战华,王金刚,丁大尉.基于VxWorks和Windows跨平台通讯.电子测量技术,2004.3:54-56页
[44]李峰,应宏,张军.利用TCP/IP实现Windows与Vxworks的通信.微计算机信息,2006.2:80-83页
[45]Wind River著,王金刚,宫霄霖,熊辉译.VxWorks网络程序员指南.清华大学出版社,2003
[46]徐铁.电子海图数据库及其索引技术研究.上海海运学院硕士论文,2003.12
[47]吴应佳.基于Linux系统下的WEB服务器安全探讨.网络天地,2007.7:24-26页
[48]刘杰.构建基于Linux服务器的网络安全平台.技术研究与应用,2007.5:66-68页
[49]王金刚,宫霄霖等编著.基于VxWorks嵌入式实时操作系统设计.清华大学出版社,2004