Mobile Networks and Applications

, Volume 20, Issue 3, pp 308–319 | Cite as

SmartGW: Enabling Bandwidth-Efficient Group Watching in Cloud Social TV Systems

  • Zheng Xue
  • Di Wu
  • Xueyan Xie
  • Yonggang Wen


Social TV is emerging as a new paradigm to transform the traditional TV viewing experience. The integration of social networks enables a set of salient social features in the TV system, among which group watching is the most attractive one. However, a simple implementation of group watching incurs significant amount of bandwidth cost in a cloud social TV system. In this paper, we propose a group-aware bandwidth management scheme called SmartGW, aiming to minimize the operational cost of the social TV service provider when delivering the group watching service and improve user QoE simultaneously. We formulate the problem into a constrained stochastic optimization problem and exploit the Lyapunov optimization theory to derive the online bandwidth provisioning and allocation strategies. We also conduct extensive trace-driven simulations to verify the effectiveness of our proposed strategies. The results show that SmartGW can cut down bandwidth cost by over 15 % compared with two alternative approaches and improve the user experience at the same time. Our work can provide useful guidelines for social TV service providers to provision their services more effectively.


Cloud social TV Group watching Bandwidth management Quality-of-experience 



This work was supported in part by the National Science Foundation of China under Grant 61272397, in part by the Guangdong Natural Science Funds for Distinguished Young Scholar under Grant S20120011187, and in part by Singapore MOE Tier-1 (RG17/14).


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Copyright information

© Springer Science+Business Media New York 2015

Authors and Affiliations

  1. 1.Department of Computer ScienceSun Yat-sen UniversityGuangzhouChina
  2. 2.SYSU-CMU Shunde International Joint Research InstituteFoshanChina
  3. 3.School of Computer EngineeringNanyang Technological UniversitySingaporeSingapore

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