TY  - JOUR
T1  - Traffic Steering System with Dual Connectivity for Video Streaming Services
AU  - Park, Gi Seok 
AU  - Noh, Hyunmin 
AU  - Ha, Jae Jun 
AU  - Kim, Hyung Jun 
AU  - Shin, Sang Heon 
AU  - Kim, Dong Hyun 
AU  - Ko, Jong Hwan 
AU  - Choi, Jeung Won 
AU  - Song, Hwangjun 
JO  - Journal of KIISE, JOK
PY  - 2019
DA  - 2019/1/14
DO  - 10.5626/JOK.2019.46.6.577
KW  - dual connectivity
KW  - software-defined networking
KW  - video streaming
KW  - fountain code
AB  - In this paper, we propose a traffic steering system with dual connectivity to provide stable video streaming services for users by steering portion of the macrocell traffic into small cells. The proposed system achieves a good balance between fairness and social welfare in terms of video quality by allocating the radio resource of the macro base station. The user data flow is divided into two channels toward the macro base station and the small cell AP, and the users receive their data from both. In the proposed system, the fountain code is adopted to overcome practical issues in the dual connectivity. Moreover, the SDN is employed not only to rapidly react to time-varying network condition, but also to control network resources efficiently. The proposed system is implemented using NS-3. The simulation results show that the proposed system can achieve much better performance compared with existing traffic steering algorithms.