The Best Paper Award from Mobimedia 2015

Liang Zhou from the Nanjing University of Posts and Telecommunications (Nanjing, China) won the Best Paper Award at the 8th International Conference on Mobile Multimedia Communications, which took place in Chengdu, People’s Republic of China on May 25–27, 2015.

The paper, entitled “QoE-Aware Device-to-Device Multimedia Communications” studies the performance properties of the mobile D2D communications in the framework of user satisfaction, and develops a fully distributed QoE multimedia communication scheme (QAMCS). Moreover, it translates the opportunistic multimedia communications issue into a stochastic optimization problem, which opens up a new degree of performance to exploit.

QoE communication is challenging principally for two varieties of reasons: the subjective measurement and opportunistic communication. Firstly, different users usually have diverse multimedia content demands, and even for the same multimedia service, its priority level for different users may be different as well, and the QoE of each user is usually distinct accordingly. Secondly, devices follow various and random mobility directions and velocities, thereby having opportunistic data transmission probability.

These two challenges principally determine the subjective communication quality or user satisfaction. For this reason, the paper extends existing data dissemination schemes in two critical aspects: the formulation of distributed multimedia dissemination problem based on real observed data popularity and priority, and the investigation of a general mobile D2D system with subjective measurement and opportunistic communication and then the set of D2D transmission range and D2D communication time in a precisely mathematical manner, and derive the optimal performance bounds for the proposed scheme.

To sum up, the paper advocates the method of distributed data dissemination to shed new light on traditionally challenging issues on system heterogeneity. More specifically, it investigates the relationship between the mobility and performance based on observed data popularity and priority from each device. Then it provides a general performance property bound for any distributed scheme. Importantly, by dynamically setting the transmission range, D2D time, and transmission fashion, it designs a class of distributed scheme to achieve the optimal performance in a fully distributed manner.

The paper will be published by Springer and made available through SpringerLink Digital Library, one of the world’s largest scientific libraries and in the EAI Endorsed Transactions on Mobile Communications and Applications.