Enabling D2D communications in LTE networks

Dimitris Tsolkas, Eirini Liotou, Nikos Passas, Lazaros Merakos
2013 2013 IEEE 24th Annual International Symposium on Personal, Indoor, and Mobile Radio Communications (PIMRC)  
Internet of Things (IoT) is an emerging paradigm that provides the future network of interconnected devices. On the other hand, Device-to-Device (D2D) communication is considered a promising technology that providing a mechanism for sharing the radio resources of LTE eNodeB for efficient spectrum utilization. A novel method is introduced in this paper to provide the required connectivity between a group of IoT devices (IoTDs) and its associated IoT gateway (IoT-GW) using D2D communication
more » ... communication underlaying LTE networks. In this context, a quality of service (QoS) based resource allocation scheme for IoTDs is proposed for enabling IoT services underlaying LTE networks. The proposed scheme is based on two main steps. In the first step, the set of allowed cellular user equipment (CUE) reuse candidates for each IoTD is determined taking into consideration the QoS requirements for both of CUEs and IoTDs. In the second step, the optimal resource allocation for each IoTD is determined. The optimization problem is modeled as a maximum bipartite matching problem that finds the optimal CUE reuse candidate for each IoTD with the objective to maximize the total number of IoTDs that can be admitted. Simulation results showed that the proposed method can be used to provides an efficient D2D-based IoT connectivity underlaying LTE cellular networks with outstanding performance in terms of access rate and achieved network throughput gain. an entire PRB to a single device will lead to degradation in the spectral efficiency. Moreover, as many types of devices in IoT environment have limited resources in terms of power and computational capability; therefore, an energy efficient communication technology is crucial for such types of devices. All of the aforementioned requirements can be achieved by using a gateway for collecting the data from a group of IoT devices (IoTDs) and then resending it to the LTE eNodeB. Using gateway will allow different devices to share a single PRB at the same time and thus increase the spectral efficiency. Furthermore, the energy consumption by each device for the communication purpose is reduced due to the short distance between the devices and gateway. Several short-range wireless communication technologies such as Bluetooth, Zigebee, and WiFi are already used for providing communication between IoTDs and the IoT gateway (IoT-GW). Since the data transmission in these technologies occurs over an unlicensed spectrum, interference avoidance will be a challenge [4] . On the other hand, communications on a licensed band of a cellular network can provide better performance in terms of interference avoidance due to the controlled environment. Device-to-Device (D2D) communication has become a promising technology for short range communication underlying LTE cellular networks. D2D communication has been proposed for cellular networks to improve the spectral efficiency and thereby increase network capacity [5-7]. The
doi:10.1109/pimrc.2013.6666632 dblp:conf/pimrc/TsolkasLPM13 fatcat:ko7esn5lk5gatn2jbnn5sxgwta