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Spectrum Allocation with Power Control in LBS Based D2D Cellular Mobile Networks

Jeong Gon Kim and Soo Hyeong Kang
Dept. of Electronic Engineering Korea Polytechnic University, Siheung-si and 15073, Korea
Abstract—Over the past decade, the demand for mobile internet traffic has been rapidly increasing as the huge increase of the smart phone and mobile devices. D2D (Device to Device) is known that it reduce the traffic load of the base station and also improves the reliability of the network performance. However, D2D communication may share the same spectrum, which means that it shares the resource with cellular networks. Although D2D reduce the load on the base station through direct communication, it also results in the increase of interference due to the sharing of the cellular spectrum. It may occur the decrease of the network throughput as the mutual interference is increased. In this paper, we propose a spectrum allocation scheme to use the resources efficiently when the D2D link share the resources of the cellular network in the uplink. D2D communication utilizes the location information for allocating resources when the eNB know the location of all devices. The proposed scheme not only ensures the performance of the D2D communication but also decrease the computational complexity We applied the power control in order to attain the maximum throughput in the D2D underlay network. We also analyze several schemes to control the power of Cellular UE and D2D user in order to satisfy the minimum SINR value in uplink cellular network environment. Simulation results show that the proposed scheme provides the maximum throughput with the 30 % of computational complexity. In order to maximize total throughput, we compare the simulation results in case of controlling only the cellular UE or D2D user and both simultaneously. It is observed that power control is effective to achieve comparable throughput with a reduced complexity for spectrum allocation.
 
Index Terms—D2D, spectrum allocation, power control, LBS, cellular networks

Cite: Jeong Gon Kim and Soo Hyeong Kang, "Spectrum Allocation with Power Controlin LBS Based D2D Cellular Mobile Networks," Journal of Communications vol. 15, no. 3, pp. 283-288, March 2020. Doi: 10.12720/jcm.15.3.283-288
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