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1 (JBE Vol. 19, No. 1, January 2014) (Special Paper) 19 1, (JBE Vol. 19, No. 1, January 2014) ISSN (Online) ISSN (Print) SDN a), a) A Study of Development for High-speed Cloud Video Service using SDN based Multi Radio Access Technology Control Methods Dongha Kim a) and Sungwon Lee a), SDN(Software Defined Network) (Multiple Radio Access Technology)., 3rd-party (off-loading),. OpenStack SDN., OpenFlow Open vswitch 2 2.4GHz 3 5GHz 820 Mbps. Abstract This paper proposed controlling methods for SDN(Software Defined Network) based multiple radio access technology as the solutions of following two issues which were mainly occurred by explosive increasing of video traffic. The first one is a requirement for traffic off-loading caused by 3rd-party video service providers from the mobile network operator's viewpoint. The other one is a provision of high-speed video contents transmission services with low price. Furthermore, the performance evaluation was also conducted on the real test-bed which is composed of OpenStack cloud and SDN technology such as OpenFlow and Open vswitch. A virtual machine running on the OpenStack provide a video service and the terminal which is able to use multiple radio access technology supports two 2.4GHz WLANs(Wireless Local Area Network) and three 5GHz WLANs, concurrently. Finally, we can get 820Mbps of the maximum transmission speed by using that five WLAN links for the single service at the same time. Keyword : SDN, cloud video service, traffic offloading, multiple-rat, heterogeneous network a) (Dept. of Computer Engineering, Kyung Hee Univ.) Corresponding Author : (Sungwon Lee) drsungwon@khu.ac.kr Tel: IT (NIPA-2013-(H )) Manuscript received November 15, 2013 Revised January 20, 2014 Accepted January 20, 2014

2 1 : SDN (Dongha Kim et al. : A Study of Development for High-speed Cloud Video Service using SDN based Multi Radio Access Technology Control Methods).. 50%, % [1-2].. 3rd-party (off-loading),,,. HetNet (Heterogeneous Network) [3]., (WLAN: Wireless Local Area Network). [4-6], ABC(Always-Best-Connected),.,.,. SDN(Software Define Network),., SDN OpenFlow [7] OVS(Open vswitch) [8],. OpenStack [9], OpenStack.. SDN. SDN,... HetNet OpenFlow SDN.,. 1. Heterogeneous Network SDN. HetNet. HetNet ABC., M2M(Machine-to-Machine) IEEE GPP EPC (Evolved Packet Core) Network (vertical hand-over) [5], (context) [6]., ABC

(JBE Vol. 19, No. 1, January 2014)., [10] SDN [11-12]. 2. OpenFlow Open vswitch OpenFlow Martin Casado, 2007 (Ethane) [13]. OpenFlow, 2011 3 OpenFlow ONF(Open Networking Foundation).

3 (JBE Vol. 19, No. 1, January 2014)., [10] SDN [11-12]. 2. OpenFlow Open vswitch OpenFlow Martin Casado, 2007 (Ethane) [13]. OpenFlow, OpenFlow ONF(Open Networking Foundation). ONF OpenFlow SDN [14]. ONF SDN,., OS(Operating System) API. NOX [15] Floodlight [16] Network OS., [17]., OpenFlow, ONF., OpenFlow x86 PC, OpenFlow OVS. OpenFlow ( )., MAC IP, OpenFlow. OpenFlow 1 (Action)., (Drop),, MAC, IP 1. OpenFlow 1.1 Fig. 1. The flow table and header information of OpenFlow version 1.1

1 : SDN (Dongha Kim et al. : A Study of Development for High-speed Cloud Video Service using SDN based Multi Radio Access Technology Control Methods)., Open vswitch, Dom0 Xen (Management domain) [8].

4 1 : SDN (Dongha Kim et al. : A Study of Development for High-speed Cloud Video Service using SDN based Multi Radio Access Technology Control Methods)., Open vswitch, Dom0 Xen (Management domain) [8]., OVS 1.4 OpenFlow 1.1 OpenFlow.. SDN,., OpenFlow Open vswitch SDN,. 2,,, IPTV, OpenFlow. 2 4., OVS OpenFlow. 2 (1) (off-loading).,. AP 3rd-party 2. OpenFlow Open vswitch Fig. 2. The main concept of controlling method for multiple radio access technology using OpenFlow and Open vswitch

5 (JBE Vol. 19, No. 1, January 2014).,., (fail-over). 2 (2)., AP.... OVS IP 1.,.,. 2 (3) 3GPP(3rd Generation Partnership Project) D2D(Device-to-Device) [18],. CDN(Content Delivery Network),., TCP/IP., SDN, 3. Fig. 3. Handling the transmission initiation request of client conducted by MRAT Controller

6 1 : SDN (Dongha Kim et al. : A Study of Development for High-speed Cloud Video Service using SDN based Multi Radio Access Technology Control Methods). 2. SDN (Multi-RAT Controller) ( ) 4. Fig. 4. Determining process of network interfaces for notifying to the client.,,..,. OpenFlow, AP OpenFlow. 4. OpenFlow,. OVS OVS. OVS TCP [8]., MRAT(Multiple Radio Access Technology) TCP/ UDP., 3, OpenStack, OpenFlow 1Gbps.. OpenFlow

7 (JBE Vol. 19, No. 1, January 2014) 5. Fig. 5. Transmission procedure for large capacity of video file, TCP/UDP. OpenFlow... Open- Stack SDN.,. 1. OpenStack SDN OpenStack, OpenFlow. 6., OpenStack x86 PC OpenStack Grizzly.,,.,. IP, IP NAT(Network Address Translation)., IP.

8 1 : SDN (Dongha Kim et al. : A Study of Development for High-speed Cloud Video Service using SDN based Multi Radio Access Technology Control Methods) 6. OpenStack SDN Fig. 6. The architecture of test-bed consist of OpenStack and SDN for performance evaluation purpose, OVS x86 PC Open- Flow. PC, , OpenFlow Hostapd [19]. 2. 6, Open- Stack OpenFlow, Open vswitch. OpenStack OpenFlow 1Gbps, OpenFlow Hostapd [19] AP SSID(Service Set Identifier) OpenFlow Table 1. Information of WLAN interfaces of OpenFlow switch AP Name SSID Frequency (Ch.) Note AP #1 osws_ GHz (Ch. 1) HT20 AP #2 osws_ GHz (Ch. 9) HT20 AP #3 osws_ GHz (Ch. 44) HT40+ AP #4 osws_ GHz (Ch. 149) HT40+ AP #5 osws_ GHz (Ch. 161) HT40-3, Iperf [20]., Iperf, Iperf UDP., 1Gbps GHz 20MHz

9 (JBE Vol. 19, No. 1, January 2014) 7. Fig. 7. The result of bandwidth measurement per wireless link 100Mbps. 5GHz 40MHz, Mbps, 820Mbps.,..,,. IEEE ac [21] 5GHz, 2.4GHz. 5GHz IEEE n ac.. SDN. OpenStack,. 820Mbps.,. (References) [1] Cisco White Paper, Cisco Visual Networking Index: Forecast and Methodology, , May [2] Ericsson, Ericsson Mobility Report, accessed Jan. 15, ericsson.com/res/docs/2013/ericsson-mobility-report-june-2013.pdf. [3] Demestichas, P., Georgakopoulos, A., Karvounas, D., Tsagkaris, K., Stavroulaki, V., Lu, J., Xiong, C., and Yao, J., 5G on the Horizon: Key Challenges for the Radio-Access Network, IEEE Vehicular Technology Magazine, 8(3), pp.47-53, Sep [4] Gustafsson, E., and Jonsson, A., Always best connected, IEEE Wireless Communications, 10(1), pp.49-55, Feb [5] Kellokoski, J., Koskinen, J., Nyrhinen, R., and Hamalainen, T., Efficient Handovers for Machine-to-Machine Communications Between IEEE and 3GPP Evolved Packed Core Networks, Green Computing and Communications (GreenCom) IEEE International Conference on, pp , Nov

1 : SDN (Dongha Kim et al. : A Study of Development for High-speed Cloud Video Service using SDN based Multi Radio Access Technology Control Methods) [6] Kellokoski, J., Koskinen, J.

, Balakrishnan, H., Parulkar, G., Peterson, L., Rexford, J., Shenker S., and Turner, J., OpenFlow: enabling innovation in campus networks, ACM SIGCOMM Computer Communication Review, 38(2), pp.

10 1 : SDN (Dongha Kim et al. : A Study of Development for High-speed Cloud Video Service using SDN based Multi Radio Access Technology Control Methods) [6] Kellokoski, J., Koskinen, J., and Hamalainen, T., Context and location aware always-best-connected concept for heterogeneous network, Wireless Days (WD) IFIP, pp. 1-3, Nov [7] McKeown, N., Anderson, T., Balakrishnan, H., Parulkar, G., Peterson, L., Rexford, J., Shenker S., and Turner, J., OpenFlow: enabling innovation in campus networks, ACM SIGCOMM Computer Communication Review, 38(2), pp.69-74, Apr [8] Pfaff, B., Pettit, J., Amidon, K., Casado, M., Koponen, T., and Shenker, S., Extending Networking into the Virtualization Layer, Hotnets, Oct [9] OpenStack official web site, accessed Jan. 15, org/. [10] Kim D., Yi G., and Lee S., A Study on the Multiple Network Interfaces Control using Open vswitch and OpenFlow, Korea Computer Congress 2011 (KCC 2012), 40(1), pp , Jun [11] Ford, A., Raiciu, C., Handley, M., Barre, S., and Iyengar, J., Architectural guidelines for multipath TCP development, RFC 6182, Mar [12] Stewart, R., Stream control transmission protocol, RFC 4906, Jun [13] Casado, M., Freedman, M. J., Pettit, J., Luo, J., McKeown, N., and Shenker, S., Ethane: Taking control of the enterprise. ACM SIGCOMM Computer Communication Review, 37(4), pp.1-12, Aug [14] Yoon, B., Lee, B., and Pitt, D., Future Networking Technology of SDN, Electronics and Telecommunications Trends, 27(2), [15] Gude, N., Koponen, T., Pettit, J., Pfaff, B., Casado, M., McKeown, N., and Shenker, S. NOX: towards an operating system for networks, ACM SIGCOMM Computer Communication Review, 38(3), pp , Jul [16] Floodlight project official web site, accessed Jan. 15, floodlightproject.org/floodlight/. [17] Open Networking Foundation, OpenFlow Switch Specification, accessed Jan. 15, sdn-resources/ onf-specifications/openflow/openflow- spec-v1.2. pdf. [18] Astely, D., Dahlman, E., Fodor, G., Parkvall, S., and Sachs, J., LTE release 12 and beyond, IEEE Communications Magazine, 51(7), pp , Jul [19] Hostapd official web site, accessed Jan. 15, [20] Iperf official web site, Iperf: The TCP/UDP bandwidth measurement tool, accessed Jan. 15, [21] Ong, E. H., Kneckt, J., Alanen, O., Chang, Z., Huovinen, T., and Nihtila, T., IEEE ac: Enhancements for very high throughput WLANs. Personal Indoor and Mobile Radio Communications (PIMRC) IEEE 22nd International Symposium on, pp , Sep : ~ : - :,, : : : ~ 2008 : ~ : - :,, MAC

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