期刊
IEEE COMMUNICATIONS SURVEYS AND TUTORIALS
卷 17, 期 1, 页码 27-51出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/COMST.2014.2330903
关键词
Software-defined networking; SDN; network virtualization; OpenFlow
资金
- National Natural Science Foundation of China [61073192]
- Grand Fundamental Research Program of China (973 Program) [2011CB302905]
- New Century Excellent Talents Program
- Fundamental Research Funds for Central Universities [WK0110000014]
- NTU under a Start-Up Grant
- Singapore MOE under MOE Tier-1 [RG 31/11]
- Singapore EMA under a EIRP02 Grant
- Singapore National Research Foundation under its IDM Futures Funding Initiative
- NSFC [61073192]
- 973 Program [2011CB302905]
Emerging mega-trends (e.g., mobile, social, cloud, and big data) in information and communication technologies (ICT) are commanding new challenges to future Internet, for which ubiquitous accessibility, high bandwidth, and dynamic management are crucial. However, traditional approaches based on manual configuration of proprietary devices are cumbersome and error-prone, and they cannot fully utilize the capability of physical network infrastructure. Recently, software-defined networking (SDN) has been touted as one of the most promising solutions for future Internet. SDN is characterized by its two distinguished features, including decoupling the control plane from the data plane and providing programmability for network application development. As a result, SDN is positioned to provide more efficient configuration, better performance, and higher flexibility to accommodate innovative network designs. This paper surveys latest developments in this active research area of SDN. We first present a generally accepted definition for SDN with the aforementioned two characteristic features and potential benefits of SDN. We then dwell on its three-layer architecture, including an infrastructure layer, a control layer, and an application layer, and substantiate each layer with existing research efforts and its related research areas. We follow that with an overview of the de facto SDN implementation (i.e., OpenFlow). Finally, we conclude this survey paper with some suggested open research challenges.
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