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proposed that the Device-to-Device (D2D) reduce frequency overload of the BS and all of the user equipment (UE) inside the BS and neighbor BS don't allow communicating directly to BS. However, in LTE-Advance system cellular link and sharing radio resources of D2D link, the strong interference of the cellular network is still high. So we need to eliminate or mitigate the interference. In this paper, we use the transmission power control method and Soft Frequency Reuse (SFR) resource allocation method to mitigate the interference of the cellular link and D2D link.Simulation results show that the proposed scheme has high performance in terms of Signal to Noise Ratio (SINR) and system average throughput.

In this paper, we propose a resource allocation schemes, called proximity user detection-based resource allocation (PUDRA), or advanced proximity user detection-based resource allocation (APUDRA) in an LTE-Advanced device-to-device (D2D) network. In the proposed schemes, in order to reduce the interference between macro user equipment (mUEs) and D2D links or between D2D links, D2D link shall use a frequency bandwidth that the neighboring mUEs or D2D links do not use. We analyzed and compared the two schemes and the random resource allocation scheme in terms of the system throughput for downlink and outage probability according to the number of D2D receivers (D2DRs). Simulation results show that the APUDRA scheme has better performance than the PUDRA and random resource allocation scheme performance in terms of the system throughput and outage probability for mUEs and D2DRs. , where he is an associate professor. His research interests include design of wireless MAC protocols, wireless packet scheduling, modeling and control of the Internet traffic, and next generation wireless communication systems design and analysis. AUTHORSTae-Sub Kim received his B.S. and M.S. degrees in computer and information science from the University of Korea in 2006 and 2009, respectively. He is currently working toward a Ph.D. degree in the Laboratory for Data Communication and Networks, Korea University.He has participated in various research projects involving an IMT-Advanced system, security techniques for smart car, U-Home, and BEMS systems. He is interested in wireless MAC protocols, wireless resource management, and design and analysis of the next generation wireless communication systems. In the area of wireless communication, he is currently focused on D2D technologies for the LTE-Advanced systems. Sang-JoonLee received the B.S. and M.S. degrees in computer and information science from the University of Korea in 2005 and 2008, respectively. He is currently working toward the Ph.D. degree in the Laboratory for Data Communication and Networks, Korea University.He has participated in various research projects involving an IMT-Advanced system, cognitive radio, security techniques for smart cars system, U-Home system, and BEMS system. He is interested in wireless MAC protocols, radio resource management, wireless mesh network, small-cell, and so on. In the area of wireless communication, he is currently focused on ABS scheme of eICIC for the LTE-Advanced systems.Chi-Hun Lim received his B.S. and M.S. degrees in computer and information science from the University of Korea in 2004 and 2006, respectively. He is currently working toward a Ph.D. degree in the Laboratory for Data Communication and Networks, Korea University. He has participated in various research projects involving an IMT-Advanced system, security techniques for smart car, and BEMS systems. He is interested in handover protocols, resource management, and design and analysis of the next generation wireless communication systems. In the area of wireless communication, he ...

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