Abstract
AbstractIn order to enable effective public safety services in challenged environments, 3rd Generation Partnership Program is considering the use of device‐to‐device (D2D) communications. D2D communications can be ideal in various emergency situations where the conventional network services get suspended. We propose a D2D‐based user equipment (UE) relaying process to support the out‐of‐range isolated UEs. The main idea is to allow UEs that have active connections with eNB to exchange data with the isolated UEs over direct D2D links. This paper proposes a mechanism that enables an ordinary UE to serve as a relay for the isolated UEs, considering the D2D link capacity and the relay's radial velocity. We define the complete procedure of establishing a reliable relay link between UEs in public safety environments and analyse its performance. Copyright © 2015 John Wiley & Sons, Ltd.
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