What we published

PhonePool like CarPool? - Presented at IEEE SECON 2014

CarPool is efficient in a metropolitan city. In a similar manner, can PhonePool will improve the networking performance of nearby mobile devices? We focused on the fact that devices in proximity are sometime subscribing diverse cellular carriers and this can extremely enhance the networking experience, especially when being located in a high speed train (e.g., KTX, TGV, Shinkansen) or in an express bus.

IEEE SECON (Conference on Sensing, Communication, and Networking, Acceptance ratio < 29%) is one of IEEE ComSoc’s quality conferences, which is run by rigorous papers of 9 pages.

Energy consumption for cellular communication is increasingly gaining importance in smartphone battery lifetime as the bandwidth of wireless communication and the demand for mobile traffic increase. For energy-efficient cellular communica- tion, we tackle two energy characteristics of cellular networks: (1) transmission energy highly varies upon channel condition, and (2) transmission of a packet accompanies unnecessary tail energy waste. Under the objective of transmitting packets when the best channel is provided as well as a number of packets are accumulated, we propose a new mobile collaboration framework “PhonePool” that aggregates smart devices across multiple cellular providers. Compared to the standalone operation, even without a buffering delay, PhonePool allows better channel and reduces more tail energy in a statistical point of view. To maximize the energy benefit while maintaining the fairness among the nodes in collaboration, we further develop a dynamic programming framework providing the optimal algorithm of PhonePool and its approximated heuristic. Trace-driven simulations on our experi- mental HSPA/EVDO/LTE network traces show that PhonePool of 5 devices achieves up to 42% of energy reduction.