| 软件定义网络中的快速移动性管理 |
| 孙文琦1,2, 李贺武2,3, 吴建平1,2 |
| 1. 清华大学 计算机科学与技术系, 北京 100084; 2. 清华大学 网络科学与网络空间研究院, 北京 100084; 3. 清华大学 信息科学与技术国家实验室, 北京 100084 |
| Fast mobility solutions in software-defined networks |
| SUN Wenqi1,2, LI Hewu2,3, WU Jianping1,2 |
| 1. Department of Computer Science and Technology, Tsinghua University, Beijing 100084, China; 2. Institute of Network Sciences and Cyberspace, Tsinghua University, Beijing 100084, China; 3. Tsinghua National Laboratory for Information Science and Technology, Tsinghua University, Beijing, 100084, China |
摘要:
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| 摘要软件定义网络(SDN)是未来互联网研究领域中的重要课题。该文首先测量和分析SDN中现有的移动性管理方案所面临的问题, 包括用户移动过程中数据包时延大和网络控制开销大等; 并以减少时延和降低控制开销为目标, 设计一种快速移动性管理方案, 该方案采用隧道和流表转发相结合的方式来实现移动性管理, 减少数据平面与控制平面的交互。模拟实验表明: 与SDN中现有的移动性管理方案相比, 快速移动性管理方案使得终端移动过程中的数据包往返时延减少了10倍左右, SDN为移动用户而产生的控制开销降低了一半以上。 | |||
| 关键词 ：软件定义网络,移动性管理,时延,控制开销 | |||
| Abstract：Software-defined networks (SDN) will be important in the future Internet. Measurements and analyses show the current SDN mobility management problems including long packet delays during handoff and considerable control overhead for supporting the mobility. The packet delay and control overhead are reduced by a fast mobility management scheme which uses tunnel and flow tables to decrease the communication between the control plane and the data plane. Simulations show that the fast IP mobility management scheme reduces the packet delay ten folds compared with the current SDN mobility management scheme with the control overhead during user handoff reduced by more than half. | |||
| Key words：software-defined networkmobility managementdelaycontrolling overhead | |||
| 收稿日期: 2014-12-18 出版日期: 2015-09-30 | |||
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| 通讯作者:李贺武,副研究员,E-mail:lihewu@cernet.edu.cnE-mail: lihewu@cernet.edu.cn | |||
| 引用本文: |
| 孙文琦, 李贺武, 吴建平. 软件定义网络中的快速移动性管理[J]. 清华大学学报（自然科学版）, 2015, 55(8): 900-905. SUN Wenqi, LI Hewu, WU Jianping. Fast mobility solutions in software-defined networks. Journal of Tsinghua University(Science and Technology), 2015, 55(8): 900-905. |
| 链接本文: |
| http://jst.tsinghuajournals.com/CN/或 http://jst.tsinghuajournals.com/CN/Y2015/V55/I8/900 |
图表:
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| 图1 SDN移动性管理流程示意图 |
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| 图2 Mininet模拟3种网络拓扑 |
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| 图3 h1到h2的数据包RTT |
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| 图4 h2到h1的数据包RTT |
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| 表1 移动过程中的控制开销 |
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| 图5 SDN快速移动性管理流程 |
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| 图6 数据包RTT仿真结果对比 |
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| 表2 不同移动性管理方法的控制开销 |
参考文献:
| [1] Mckeown N, Anderson T, Balakrishnan H, et al. OpenFlow: enabling innovation in campus networks [J]. ACM SIGCOMM Computer Communication Review, 2008, 38(2): 69-74. [2] 周烨, 李勇, 王芳, 等. 基于OpenFlow 的网络实验平台技术 [J], 清华大学学报(自然科学版), 2012, 52(11): 1540-1544. ZHOU Y, LI Yong, WANG Fang, et al. OpenFlow network experiment platform [J], J Tsinghua Univ (Sci and Tech) 2012, 52(11): 1540-1544. (in Chinese) [3] IETF. IP Mobility support for IPv4 [EB/OL]. [2014-12-14]. https://www.ietf.org/rfc/rfc3344.txt. [4] IETF. Mobility support in IPv6 [EB/OL]. [2014-12-14]. https://tools.ietf.org/html/rfc6275. [5] IETF. ILNP [EB/OL]. [2014-12-14]. https://www.ietf.org/rfc/rfc6740.txt. [6] IETF. HIP [EB/OL]. [2014-12-14]. https://www.ietf.org/rfc/rfc5201.txt. [7] IETF. PMIPv6 [EB/OL] [2014-12-14]. https://www.ietf.org/rfc/rfc5213.txt. [8] 3GPP. 3GPP CT4, Proxy mobile IPv6-Stage 3 specification [EB/OL]. [2014-12-14]. http://www.3gpp.org/ftp/Specs/ archive/29_series/29.275/29275-a20.zip. [9] WANG You, BI Jun. A solution for IP mobility support in software defined networks [C]//Computer Communications and Networks (ICCCN), 2014 Proceedings of 23th International Conference on. Shanghai, China: IEEE Press, 2014: 1-8. [10] Mininet. Mininet: An instant virtual network on your laptop [EB/OL]. [2014-12-14]. http://mininet.org/. [11] Floodlight. Project floodlight [EB/OL]. [2014-12-14]. http://www.projectfloodlight.org/floodlight/ [12] Mogul J C, Tourrilhes J, Yalagandula P, et al. Devoflow: Cost-effective flow management for high performance enterprise networks[C]//Proceedings of the 9th ACM SIGCOMM Workshop on Hot Topics in Networks. New Delhi, India: ACM, 2010, 1. |
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