1. Introduction,Kaikai Liu and Xiaolin Li 2. Overview of Mobile Systems,Kaikai Liu and Xiaolin Li 3. Acoustic Ranging and Communication, Kaikai Liu and Xiaolin Li 4. Localization Algorithms,Kaikai Liu and Xiaolin Li 5. Guoguo: Enabling Fine-Grained Smartphone Localization, Kaikai Liu, Xinxin Liu, and Xiaolin Li 6. Enhancing Location Accuracy and Robustness via Opportunistic Sensing,Kaikai Liu and Xiaolin Li 7. Pushing Location Awareness to Context-Aware Augmented Reality,Kaikai Liu and Xiaolin Li 8.

Towards Location-Aware Mobile Social Networks with Missions,Kaikai Liu and Xiaolin Li 9. Wearable Localization via Mobile Crowd Sensing,Kaikai Liu and Xiaolin Li 10. Improving Location Services via Social Collaboration, Kaikai Liu, Qiuyuan Huang, Jiecong Wang, Xiaolin Li, and Dapeng Oliver Wu 11. Hiding Media Data via Shaders: Enabling Private Sharing in the Clouds,Kaikai Liu and Xiaolin Li 12. Conclusion and Future Directions,Kaikai Liu and Xiaolin Lil Collaboration, Kaikai Liu, Qiuyuan Huang, Jiecong Wang, Xiaolin Li, and Dapeng Oliver Wu 11. Hiding Media Data via Shaders: Enabling Private Sharing in the Clouds,Kaikai Liu and Xiaolin Li 12. Conclusion and Future Directions,Kaikai Liu and Xiaolin Li.