WiMAX接入服务网络网关切换设计
摘要
IEEE提出WiMAX无线网络标准,包含了OFDMA、MIMO和SSA等耳目一新的技术,同时在网络架构上,也有其前瞻性的考虑,网络全IP化和扁平化的网络架构,均为通信网络长期演进的方向。
WiMAX网络接入服务网关(Access Service Networks Gateway,ASN-GW)是连接基站(Basic Station,BS)和核心网(Connectivity Service Network,CSN)的关键系统,网络中的众多功能由ASN-GW和BS协同完成,例如网络进入、网络退出、MS切换(Handover,HO)、服务流管理(Service flow management,SFM)、DHCP和AAA等,其中切换是WiMAX系统中最关键的流程控制模块之一,目前大量的文献研究均在关注BS的切换工作,对ASN-GW的切换研究与设计工作较少。
本文将完成ASN-GW系统切换功能的研究与设计实现,主要工作是遵循WiMAX网络工作组(Network Working Group,NWG)论坛建议,采用面向对象思想和C++语言进行工程实现,并得出有关切换的测试数据。本文首先介绍WiMAX切换研究的状况,然后说明了ASN-GW系统整体架构设计,以及相关的硬件平台和操作系统。重点描述了ASN-GW切换的设计和实现,实施切换工作的时候,切换模块将与系统中的多个功能模块发生交互,比如数据隧道、MS上下文、CMAC等。最后描述了ASN-GW的测试开发和平台搭建,验证了ASN-GW切换的功能和性能,得到的测试指标均满足蜂窝式移动通信运营商的要求。
测试是验证切换设计实现的关键步骤,为了达到测试要求,该研究进行了测试软件开发和搭建了模拟测试网络环境。开发了BS Simulator和MS Simulator,完成了切换各个子模块的单元测试,同时也对整个切换模块进行了大量的性能测试,最后得到了理想的测试结果,如ASN-GW的切换高成功率和低切换时延,为WiMAX系统完成切换功能提供了有力保证。
With the forthcoming WiMAX wireless network specification, IEEE has covered many new technologies such as OFDMA, MIMO, SSA and so on. Meanwhile, within a framework of IP-based and flat network, it is such a perpsective study that leads the direction of long-term evolution in the communication field.
WiMAX is a key system to connect BS and CSN, and most of its functions such as Network Entry, Network Exit , MS, SFM, DHCP, AAA, etc. are done by ASN-GW and BS together. Among them, MS Handover is one of the most crucial flow controlling modes, but up to now most studies only concentrate on BS Handover while there are few researches concerning ASN-GW handover.
Taking the current situation into consideration, the present thesis hence mainly focus on the design and realization of ASN-GW Handover. Under the guidance of WiMax NWG principles, it adopts an object-oriented way to realize the whole project by using C++, and in the end some relevant testing data are expected to be obtained. At the beginning, the thesis introduces the background of WiMAX Handover, then explains the hardware platform and whole framework of WiMAX Network, and later puts the emphasis on its design and realization. Finally, the network development and platform construction of ASN-GW being described in detail efficiently confirms the function and performance of ASN-GW. It can be concluded that all the testing parameters could satisfy the needs of telecom service providers.
Testing is a strategic point in the process of Handover design and realization. To meet the requirment, the present study develops BS Simulator and MS Simulator to operate the whole testing process in which each sub-module and correspondent funtions are fully tested. The testing result has proved to be satisfactory: the high successful ratio and low time-delay of ASN-GW handover will provide powerful assistance to the handover function of WiMAX network system.
WiMAX网络接入服务网关(Access Service Networks Gateway,ASN-GW)是连接基站(Basic Station,BS)和核心网(Connectivity Service Network,CSN)的关键系统,网络中的众多功能由ASN-GW和BS协同完成,例如网络进入、网络退出、MS切换(Handover,HO)、服务流管理(Service flow management,SFM)、DHCP和AAA等,其中切换是WiMAX系统中最关键的流程控制模块之一,目前大量的文献研究均在关注BS的切换工作,对ASN-GW的切换研究与设计工作较少。
本文将完成ASN-GW系统切换功能的研究与设计实现,主要工作是遵循WiMAX网络工作组(Network Working Group,NWG)论坛建议,采用面向对象思想和C++语言进行工程实现,并得出有关切换的测试数据。本文首先介绍WiMAX切换研究的状况,然后说明了ASN-GW系统整体架构设计,以及相关的硬件平台和操作系统。重点描述了ASN-GW切换的设计和实现,实施切换工作的时候,切换模块将与系统中的多个功能模块发生交互,比如数据隧道、MS上下文、CMAC等。最后描述了ASN-GW的测试开发和平台搭建,验证了ASN-GW切换的功能和性能,得到的测试指标均满足蜂窝式移动通信运营商的要求。
测试是验证切换设计实现的关键步骤,为了达到测试要求,该研究进行了测试软件开发和搭建了模拟测试网络环境。开发了BS Simulator和MS Simulator,完成了切换各个子模块的单元测试,同时也对整个切换模块进行了大量的性能测试,最后得到了理想的测试结果,如ASN-GW的切换高成功率和低切换时延,为WiMAX系统完成切换功能提供了有力保证。
With the forthcoming WiMAX wireless network specification, IEEE has covered many new technologies such as OFDMA, MIMO, SSA and so on. Meanwhile, within a framework of IP-based and flat network, it is such a perpsective study that leads the direction of long-term evolution in the communication field.
WiMAX is a key system to connect BS and CSN, and most of its functions such as Network Entry, Network Exit , MS, SFM, DHCP, AAA, etc. are done by ASN-GW and BS together. Among them, MS Handover is one of the most crucial flow controlling modes, but up to now most studies only concentrate on BS Handover while there are few researches concerning ASN-GW handover.
Taking the current situation into consideration, the present thesis hence mainly focus on the design and realization of ASN-GW Handover. Under the guidance of WiMax NWG principles, it adopts an object-oriented way to realize the whole project by using C++, and in the end some relevant testing data are expected to be obtained. At the beginning, the thesis introduces the background of WiMAX Handover, then explains the hardware platform and whole framework of WiMAX Network, and later puts the emphasis on its design and realization. Finally, the network development and platform construction of ASN-GW being described in detail efficiently confirms the function and performance of ASN-GW. It can be concluded that all the testing parameters could satisfy the needs of telecom service providers.
Testing is a strategic point in the process of Handover design and realization. To meet the requirment, the present study develops BS Simulator and MS Simulator to operate the whole testing process in which each sub-module and correspondent funtions are fully tested. The testing result has proved to be satisfactory: the high successful ratio and low time-delay of ASN-GW handover will provide powerful assistance to the handover function of WiMAX network system.
引文
[1] IEEE P802.16? (Draft Mar2007),DRAFT Standard for Local and metropolitan area networks Part 16: Air Interface for Fixed Broadband Wireless Access Systems
[2] WiMAX Forum Network Architecture Stage2: Architecture Tenets, Reference Model and Reference Points 2008
[3] WiMAX Forum Network Architecture Stage3: Detailed Protocols and Procedures 2008
[4] Doo hwan lee, Hiroykui Morikawa, Per formance Analysis of Ranging Process in IEEE 802.16e OFDM System, third IEEE International Conference on Wireless and Mobile Computing, Networking and Communications 2007
[5] Mahmoud, H.A.,Arslan,H.,Ozdemir,M,K., Intial Ranging for WiMAX(802.16e) OFDM[Z],Military Communications Conference,2006
[6] Sunghyun Cho, et al. Fast Handover Scheme for Real- time Downlink Services in IEEE 802.16e BWA System.Proc. Of VTC 2006- Spring, May 2006, 3
[7]秦迟,IEEE 802.16系统的切换算法与准入控制策略的研究,浙江大学硕士论文,2007
[8] Sik Choi,Gyung-Ho Hwang, Taesoo Kwon,et al. Fast Handover Scheme for Real-time Downlink Services[C],Proceedings of IEEE 802.16e BWA System Vehicular Technology Conference [S. l.]:IEEE Press,2005: 2028-2032
[9]唐宏,何鑫等,IEEE802.16e宽带无线接入中的切换及其过程,通信技术,2007
[10]王桂英,宋华俐,IEEE802.16e系统中的切换技术分析,中央民族大学学报,2006
[11]罗彦林,孙毅等,宽带无线移动通信接入网络中的切换方法,计算机工程,2008
[12]熊尚坤,王庆杨,移动WiMAX系统中的切换优化方案分析,电信科学,2008
[13]王丽萍,基于WiMAX技术宽带无线网络下切换策略研究,同济大学硕士学位论文,2007
[14]陆凯,徐旨胜,WiMAX网络的切换技术研究,电力系统通信,2007
[15]姚惠娟,许国武等,IEEE 802.16d/e宽带无线接入网络中的切换机制的研究,数据通信,2007
[16] H- J Jang, et al. Mobile IPv6 Fast Handovers over IEEE 802.16 Networks. draft-jang- mipshop- fh80216e- 00(work in progress), 2005
[17]刘剑,移动IPv6快速切换设计与实现,电子科技大学硕士学位论文,2007
[18]李沛,勒浩,张斌等,WiMAX跨层切换技术的研究与仿真,现代电信科技,2008
[19] Rajeev Koodli, Fast Handovers for Mobile IPv6, IETF RFC4068 , July 2005.
[20] WiMAX Forum NWG WiMAX_NWG_Stage_3_VandV_Readiness_Draft, August 2006
[21]陈山枝,时岩等,移动性管理与技术,电子工业出版社,2007
[22]贺昕,李斌,异构无线网络切换技术,北京邮电大学出版社,2008
[23]张玉军,可信的移动Ipv6网络及协议,科学出版社,2008
[24] Jinsoo Park, et al.Mobile IPv6 Fast Handovers over IEEE 802.16 Networks. Proc. OfVTC 2006- Fall., Sept 2006, 1～5
[25]何晓英,贾颖等,移动因特网切换损失率研究,计算机研究与发展,2003
[26] A G Valko1 Cellular IP—A new approach to Internet host mobility. ACM Computer Communications Review , 1999 , 29 (1) : 50～65
[27] A T Campbell , J Gomez , S Kim et al1 Design , implementation ,and evaluation of cellular IP1 IEEE Personal Communications ,Special Issue on IP2based Mobile Telecommunications Networks ,2000 , 7 (4) : 42～49
[28] W.Richard Stevens,TCP/IP Illustracted Volume 1:The Protocols,2000
[29] ITU G.114 One-way transmission time 2000
[30]赵隽琪,运营商以太网测试(三),电信技术,2008
[31] Stuart Jamieson,利用MicroTCA架构实现电信设备的模块化设计,电子系统设计2007. 8
[32] www.EmersonNetworkPower.com/EmbeddedComputing
[33] www.cavium.com/OCTEON-Plus_CN58XX.html
[34]付建军,WiMAX切换对业务的影响评估,数字通信世界,2007,9
[35]吕应权,周冲,WCDMA系统有效提高切换成功率的方法,中兴通信技术,2008
[36]陈国军,“GSM网络优化浅析”,邮电设计技术,2004,4
[37] www.3gpp.org
[38]梁旭东,七号信令,华为技术,2001
[39] IETF RFC 2784 Generic Routing Encapsulation (GRE) March 2000
[40]周贤伟,IPSec解析,国防工业出版社,2006
[41]李明江等,SNMP简单网络管理协议,电子工业出版社,2007
[42] www.windriver.com
[43]王育明,刘建伟,通信网的安全—理论与技术,西安电子科技大学出版社,1999
[44]秦冀,姜雪松,移动IP技术与NS- 2模拟,机械工业出版社,2006.10
[45] http://www.spirent.com/Solutions-Directory/Landslide.aspx
[2] WiMAX Forum Network Architecture Stage2: Architecture Tenets, Reference Model and Reference Points 2008
[3] WiMAX Forum Network Architecture Stage3: Detailed Protocols and Procedures 2008
[4] Doo hwan lee, Hiroykui Morikawa, Per formance Analysis of Ranging Process in IEEE 802.16e OFDM System, third IEEE International Conference on Wireless and Mobile Computing, Networking and Communications 2007
[5] Mahmoud, H.A.,Arslan,H.,Ozdemir,M,K., Intial Ranging for WiMAX(802.16e) OFDM[Z],Military Communications Conference,2006
[6] Sunghyun Cho, et al. Fast Handover Scheme for Real- time Downlink Services in IEEE 802.16e BWA System.Proc. Of VTC 2006- Spring, May 2006, 3
[7]秦迟,IEEE 802.16系统的切换算法与准入控制策略的研究,浙江大学硕士论文,2007
[8] Sik Choi,Gyung-Ho Hwang, Taesoo Kwon,et al. Fast Handover Scheme for Real-time Downlink Services[C],Proceedings of IEEE 802.16e BWA System Vehicular Technology Conference [S. l.]:IEEE Press,2005: 2028-2032
[9]唐宏,何鑫等,IEEE802.16e宽带无线接入中的切换及其过程,通信技术,2007
[10]王桂英,宋华俐,IEEE802.16e系统中的切换技术分析,中央民族大学学报,2006
[11]罗彦林,孙毅等,宽带无线移动通信接入网络中的切换方法,计算机工程,2008
[12]熊尚坤,王庆杨,移动WiMAX系统中的切换优化方案分析,电信科学,2008
[13]王丽萍,基于WiMAX技术宽带无线网络下切换策略研究,同济大学硕士学位论文,2007
[14]陆凯,徐旨胜,WiMAX网络的切换技术研究,电力系统通信,2007
[15]姚惠娟,许国武等,IEEE 802.16d/e宽带无线接入网络中的切换机制的研究,数据通信,2007
[16] H- J Jang, et al. Mobile IPv6 Fast Handovers over IEEE 802.16 Networks. draft-jang- mipshop- fh80216e- 00(work in progress), 2005
[17]刘剑,移动IPv6快速切换设计与实现,电子科技大学硕士学位论文,2007
[18]李沛,勒浩,张斌等,WiMAX跨层切换技术的研究与仿真,现代电信科技,2008
[19] Rajeev Koodli, Fast Handovers for Mobile IPv6, IETF RFC4068 , July 2005.
[20] WiMAX Forum NWG WiMAX_NWG_Stage_3_VandV_Readiness_Draft, August 2006
[21]陈山枝,时岩等,移动性管理与技术,电子工业出版社,2007
[22]贺昕,李斌,异构无线网络切换技术,北京邮电大学出版社,2008
[23]张玉军,可信的移动Ipv6网络及协议,科学出版社,2008
[24] Jinsoo Park, et al.Mobile IPv6 Fast Handovers over IEEE 802.16 Networks. Proc. OfVTC 2006- Fall., Sept 2006, 1～5
[25]何晓英,贾颖等,移动因特网切换损失率研究,计算机研究与发展,2003
[26] A G Valko1 Cellular IP—A new approach to Internet host mobility. ACM Computer Communications Review , 1999 , 29 (1) : 50～65
[27] A T Campbell , J Gomez , S Kim et al1 Design , implementation ,and evaluation of cellular IP1 IEEE Personal Communications ,Special Issue on IP2based Mobile Telecommunications Networks ,2000 , 7 (4) : 42～49
[28] W.Richard Stevens,TCP/IP Illustracted Volume 1:The Protocols,2000
[29] ITU G.114 One-way transmission time 2000
[30]赵隽琪,运营商以太网测试(三),电信技术,2008
[31] Stuart Jamieson,利用MicroTCA架构实现电信设备的模块化设计,电子系统设计2007. 8
[32] www.EmersonNetworkPower.com/EmbeddedComputing
[33] www.cavium.com/OCTEON-Plus_CN58XX.html
[34]付建军,WiMAX切换对业务的影响评估,数字通信世界,2007,9
[35]吕应权,周冲,WCDMA系统有效提高切换成功率的方法,中兴通信技术,2008
[36]陈国军,“GSM网络优化浅析”,邮电设计技术,2004,4
[37] www.3gpp.org
[38]梁旭东,七号信令,华为技术,2001
[39] IETF RFC 2784 Generic Routing Encapsulation (GRE) March 2000
[40]周贤伟,IPSec解析,国防工业出版社,2006
[41]李明江等,SNMP简单网络管理协议,电子工业出版社,2007
[42] www.windriver.com
[43]王育明,刘建伟,通信网的安全—理论与技术,西安电子科技大学出版社,1999
[44]秦冀,姜雪松,移动IP技术与NS- 2模拟,机械工业出版社,2006.10
[45] http://www.spirent.com/Solutions-Directory/Landslide.aspx