基于ICE的SIP穿越Symmetric NAT技术的改进
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摘要
针对SIP(会话发起协议)穿越NAT设备的问题,提出ICE(交互式连通建立方式)协助SIP穿越Symmetric NAT的优化方案。设计端口分配服务器,实现针对SIP和ICE特性的改进端口预测模型,智能化ICE检测列表和改进连通检测过程,使SIP能够采用UDP直连方式高效穿越绝大部分Symmetric NAT。大量实验结果表明,改进方案保持了传统ICE方法不改动NAT设备的优点,有效提高了针对Symmetric NAT的穿越效率,缩短了ICE连通性检测过程的时间,满足更多企业使用Symmetric NAT提高信息安全性的需求。
According to SIP(session initiation protocol)traversing NAT devices,an optimized scheme was put forward to help SIP traversing Symmetric NAT based on ICE(interactive connectivity establishment).To make ICE traverse through most of Symmetric NATs using the way of UDP direct transfer effectively,an improved model of port prediction and the port assignments server was designed,meanwhile,a specific ICE test list was formed and the connecting process was simplified.Experimental results show that the improved scheme maintains the advantages of original ICE including dis-modifying NAT device and allows SIP to operate through Symmetric NAT with high efficiency and low ICE check time.And it meets enterprises' requirement of using the Symmetric NAT to improve information security.
According to SIP(session initiation protocol)traversing NAT devices,an optimized scheme was put forward to help SIP traversing Symmetric NAT based on ICE(interactive connectivity establishment).To make ICE traverse through most of Symmetric NATs using the way of UDP direct transfer effectively,an improved model of port prediction and the port assignments server was designed,meanwhile,a specific ICE test list was formed and the connecting process was simplified.Experimental results show that the improved scheme maintains the advantages of original ICE including dis-modifying NAT device and allows SIP to operate through Symmetric NAT with high efficiency and low ICE check time.And it meets enterprises' requirement of using the Symmetric NAT to improve information security.
引文
[1]Jonathan Davidson,James Peters,Manoj Bhatia,等.VoIP technique architecture[M].2nd ed.GAO Yan,transl.Beijing:Posts and Telecom Press,2012:17-20(in Chinese).[Jonathan Davidson,James Peters,Manoj Bhatia,等.VoIP技术构架[M].2版.高艳,译.北京:人民邮电出版社,2012:17-20.]
[2]ZHAO Lili.Research and realization of the IP business voice system based on the SIP[D].Guiyang:Guizhou University,2009(in Chinese).[赵莉莉.基于SIP的IP商务语音系统的研究与实现[D].贵阳:贵州大学,2009.]
[3]LIU Yongjian.Streaming media transmission across the Internet[D].Changchun:Jilin University,2014(in Chinese).[刘永健.流媒体跨网路传输[D].长春:吉林大学,2014.]
[4]CAO Shenhui.Research and realization of technology of traversing NAT[D].Nanjing:Nanjing Post and Communications University,2013(in Chinese).[曹申会.NAT穿越技术研究与实现[D].南京:南京邮电大学,2013.]
[5]REN Hao,WANG Jinlin,LU Yifeng.Research of technology of traversing NAT with UPnP and STUN[J].Computer Engineering and Applications,2009,45(2):99-101(in Chinese).[任浩,王劲林,鲁逸峰.UPnP和STUN相结合的NAT穿越技术研究[J].计算机工程与应用,2009,45(2):99-101.]
[6]CAI Zegao.Research and applications of SIP system based on P2P[D].Nanjing:Nanjing Post and Communications University,2011(in Chinese).[蔡则高.基于P2P的SIP系统研究与应用[D].南京:南京邮电大学,2011.]
[7]WANG Mengjie,HE Jiaming.Research and realization of technology of traversing NAT based on ICE[J].Mobile Communication,2015,39(2):45-50(in Chinese).[王梦杰,何加铭.基于ICE的SIP穿越NAT方法的研究[J].移动通信,2015,39(2):45-50.]
[8]LING Xiaorong.Research and realization of network audio and video communication based on SIP[D].Guangzhou:South China University of Technology,2014(in Chinese).[凌小荣.基于SIP网络音视频通信的研究与实现[D].广州:华南理工大学,2014.]
[9]LIU Shenghui,ZHOU Ye.Improvement of technology of traversing symmetric NAT based on ICE[J].Computer Engineering and Applications,2010,46(3):109-111(in Chinese).[刘胜辉,周野.对ICE穿越Symmetric NAT技术的改进[J].计算机工程与应用,2010,46(3):109-111.]
[10]DU Derong,LIU Jianming,LI Hongzhou,et al.Research of NAT traversal for SIP under mobile Internet environment[J].Microelectronics&Computer,2013,30(7):111-114(in Chinese).[杜得荣,刘建明,李宏周,等.移动互联网环境下SIP穿越NAT的研究[J].微电子学与计算机,2013,30(7):111-114.]
[11]LU Qifang.Research and realization of NAT traversal in P2P based on UDP[D].Guiyang:Guizhou University,2010(in Chinese).[卢启芳.P2P中基于UDP的NAT穿越方案的研究与实现[D].贵阳:贵州大学,2010.]
[12]RFC 5245,Interactive connectivity establishment(ICE):A protocol for network address translator(NAT)traversal for offer/answer protocols[S].East Hanover:Rosenberg J,2010.
[13]CHANG Juzheng,WANG Ying,WANG Qinghui.NAT traversal for VOIP media flow using ICE[J].Computer Application Technology,2010,33(6):105-107(in Chinese).[畅巨峥,汪滢,王庆辉.利用ICE实现VOIP媒体流穿越[J].计算机应用技术,2010,33(6):105-107.]
[2]ZHAO Lili.Research and realization of the IP business voice system based on the SIP[D].Guiyang:Guizhou University,2009(in Chinese).[赵莉莉.基于SIP的IP商务语音系统的研究与实现[D].贵阳:贵州大学,2009.]
[3]LIU Yongjian.Streaming media transmission across the Internet[D].Changchun:Jilin University,2014(in Chinese).[刘永健.流媒体跨网路传输[D].长春:吉林大学,2014.]
[4]CAO Shenhui.Research and realization of technology of traversing NAT[D].Nanjing:Nanjing Post and Communications University,2013(in Chinese).[曹申会.NAT穿越技术研究与实现[D].南京:南京邮电大学,2013.]
[5]REN Hao,WANG Jinlin,LU Yifeng.Research of technology of traversing NAT with UPnP and STUN[J].Computer Engineering and Applications,2009,45(2):99-101(in Chinese).[任浩,王劲林,鲁逸峰.UPnP和STUN相结合的NAT穿越技术研究[J].计算机工程与应用,2009,45(2):99-101.]
[6]CAI Zegao.Research and applications of SIP system based on P2P[D].Nanjing:Nanjing Post and Communications University,2011(in Chinese).[蔡则高.基于P2P的SIP系统研究与应用[D].南京:南京邮电大学,2011.]
[7]WANG Mengjie,HE Jiaming.Research and realization of technology of traversing NAT based on ICE[J].Mobile Communication,2015,39(2):45-50(in Chinese).[王梦杰,何加铭.基于ICE的SIP穿越NAT方法的研究[J].移动通信,2015,39(2):45-50.]
[8]LING Xiaorong.Research and realization of network audio and video communication based on SIP[D].Guangzhou:South China University of Technology,2014(in Chinese).[凌小荣.基于SIP网络音视频通信的研究与实现[D].广州:华南理工大学,2014.]
[9]LIU Shenghui,ZHOU Ye.Improvement of technology of traversing symmetric NAT based on ICE[J].Computer Engineering and Applications,2010,46(3):109-111(in Chinese).[刘胜辉,周野.对ICE穿越Symmetric NAT技术的改进[J].计算机工程与应用,2010,46(3):109-111.]
[10]DU Derong,LIU Jianming,LI Hongzhou,et al.Research of NAT traversal for SIP under mobile Internet environment[J].Microelectronics&Computer,2013,30(7):111-114(in Chinese).[杜得荣,刘建明,李宏周,等.移动互联网环境下SIP穿越NAT的研究[J].微电子学与计算机,2013,30(7):111-114.]
[11]LU Qifang.Research and realization of NAT traversal in P2P based on UDP[D].Guiyang:Guizhou University,2010(in Chinese).[卢启芳.P2P中基于UDP的NAT穿越方案的研究与实现[D].贵阳:贵州大学,2010.]
[12]RFC 5245,Interactive connectivity establishment(ICE):A protocol for network address translator(NAT)traversal for offer/answer protocols[S].East Hanover:Rosenberg J,2010.
[13]CHANG Juzheng,WANG Ying,WANG Qinghui.NAT traversal for VOIP media flow using ICE[J].Computer Application Technology,2010,33(6):105-107(in Chinese).[畅巨峥,汪滢,王庆辉.利用ICE实现VOIP媒体流穿越[J].计算机应用技术,2010,33(6):105-107.]