An SINR-Aware Joint Mode Selection, Scheduling, and Resource Allocation Scheme for D2D Communications

In this paper, a new mode selection (MS) scheme for device-to-device (D2D) enabled cellular networks is proposed. The MS is carried out using a predefined signal-to-interference plus noise ratio (SINR) threshold and it aims to guarantee a minimum level of quality of service. With the new scheme, interfering effects are taken into consideration, while realistic assumptions for the acquisition of the channel information are made. Assuming a single-user case, an analytical framework is developed, which is based on the Markov-chain theory, and is used to study the system's performance. The various performance results obtained reveal that with the proposed MS, the probability of mode switching can be reduced (as compared to other systems), and thus, an increase on the overhead and signal processing is avoided. Moreover, a new approach is applied in a multi-user communication scenario, where a joint MS, resource allocation (RA), and scheduling optimization problem is formulated. The solution to this problem is based on a greedy heuristic algorithm that properly assigns the available resources among cellular users and D2D pairs. The joint MS, RA, and scheduling algorithm considers limited SINR awareness and it provides significant performance improvement in terms of sum-rate. © 1967-2012 IEEE

E-SPONDER System: A new Communication Infrastructure for Future Emergency Networks

This paper describes a novel emergency communication network architecture implemented within the FP7 EU project E-SPONDER. It is characterized by the deployment of heterogeneous wireless systems and also by its holistic approach achieving reliability, high performance, reconfigurability and standalone operation. It is a complete suite of real-time communication technologies built to support the first responders with information services during disaster events. This work investigates the system architecture in an aircraft landing incident and describes a field test carried on at Schiphol airport in Amsterdam. More specifically, a scalable and adaptive telecommunication architecture that ensures voice, video and data between first responders and command centers at all times, even under extreme conditions, is presented. The structure and functionalities of the VoIP subsystem that operates above the proposed heterogeneous E-SPONDER network architecture is described, with a detailed scenario analysis. Finally, the paper presents how the recommended solutions are integrated into an implementable platform