Nowadays networked mobile devices have become a commodity in people's daily-­life. According to a recent survey published by Walker Sanders, the percentage of web traffic coming from mobile devices has surpassed 30% in late 2013. To serve users from all over the world, a number of global (or planet­-scale) mobile systems and applications have been established. Several new technologies, such as mobile cloud networking, wearable computing, mobile payment, high-­throughput wireless data delivery, and location­-based services, have received great attentions. In the meanwhile, by attracting more than one billion users worldwide, online social networks (OSNs) provide a new venue of innovation with many challenging and practical research problems. In particular, more and more social network systems have expanded to mobile platforms. Not to mention those large­-scale mobile-­centric social network systems, such as WhatsApp, WeChat, Snapchat, and Swarm. For both of the academia and industry, how to utilize the emerging mobile technologies to help people's online social interactions has become a viable trend.

The 7th International Workshop on Hot Topics in Planet­-scale mObile computing and online Social neTworking (HotPOST 2015) is organized with the goal to bring researchers working on the intersection of mobile and OSN together to present and discuss their latest research results and ideas, thereby promoting the development and evolution of this area. All submissions on mobile platforms and OSNs related to architecture, design, implementation, simulation, modeling, analysis and measurement are welcomed. We highly encourage novel and innovative previously unpublished work, even reporting work in early stage.

Topics include but are not limited to:
● Mobile­-centric social network services
● Location-­based social networks (LBSNs)
● Large­-scale mobile systems and applications
● Online advertising
● Measurement of mobile systems and applications
● User behavior analysis and modeling in mobile social applications
● Architecture of mobile social systems
● Security and privacy in mobile social systems
● Incentives and economics in mobile social networks
● Mobile­-centric Internet architecture
● Mobile cloud networking
● Wearable computing
● Mobile payment
● Mobile P2P systems

Authors are encouraged to submit full papers describing original, previously unpublished research, not currently under review by another conference or journal, addressing state­-of­-the-­art research and development in all areas of mobile/OSN. Papers must be submitted electronically in EDAS (https://edas.info/newPaper.php?c=19625). The length of papers must be no more than 6 pages, including tables and figures. The cover page must contain an abstract of about 150 words, name and affiliation of author(s) as well as the corresponding author's e­mail and postal address. Each submission will receive at least three independent blind reviews from the TPC. At least one of the authors of every accepted paper must register and present their work at the workshop.

General Co-chairs:
Michael Sirivianos (Cyprus University of Technology, Cyprus)
Pan Hui (Hong Kong University of Science and Technology, Hong Kong)
Nishanth Sastry (King's College London, UK)

TPC Co-chairs:
Yang Chen (Fudan University, China)
Hongqiang Harry Liu (Microsoft Research, USA)

Publicity Chair:
Matthias Wählisch (Freie Universität Berlin, Germany)

Web Chair:
Xin Wu (BigSwitch Networks, USA)

TPC Members (tentative):
Bogdan Carbunar (Florida International University, USA)
Qiang Cao (Duke University, USA)
Ruichuan Chen (Bell Labs, Alcatel-Lucent Deutschland, Germany)
Rohan Gandhi (Purdue University, USA)
Hamed Haddadi (Queen Mary, University of London, UK)
David Hausheer (TU Darmstadt, Germany)
Xin Jin (Princeton University, USA)
Qi Li (Tsinghua University, China)
Cristian Lumezanu (NEC Laboratories, USA)
Abedelaziz Mohaisen (Verisign Labs, USA)
Aniket Mahanti (University of Auckland, New Zealand)
Jogesh Muppala (Hong Kong University of Science and Technology, Hong Kong)
Ángel Cuevas Rumín (Universidad Carlos III de Madrid, Spain)
Rubén Cuevas Rumín (Universidad Carlos III de Madrid, Spain)
Thomas C. Schmidt (Hamburg University of Applied Sciences, Germany)
Thorsten Strufe (TU Darmstadt, Germany)
Gareth Tyson (Queen Mary, University of London, UK)
Feng Wang (University of Mississippi, USA)
Xiao Sophia Wang (University of Washington, USA)
David Wolinsky (Yale University, USA)
Chuan Wu (University of Hong Kong, Hong Kong)
Eiko Yoneki (University of Cambridge, UK)