Device-to-device communications in long term evaluation-advanced network

In recent days the mobile data usage traffic has risen exponentially due to the increasing mobile subscriber growth, the emergence of data intensive applications such as online gaming, video sharing etc. It is driving the telecommunication industry as well as the research community to come up with new paradigms that will support such high data rate requirements within the existing wireless access network, in an efficient and effective manner. To respond to this challenge, Device-to-Device (D2D) communication in cellular networks is viewed as a promising solution, which is expected to operate, either within the coverage area of the existing eNB and under the same cellular spectrum (inband) or separate spectrum (outband). D2D provides the opportunity for users located in close proximity of each other to communicate directly, without traversing data traffic through the eNB. It results in several transmission gains, such as improved throughput, energy gain, hop gain, reuse gain, etc. The aim of this paper is evaluation of communication options, simulation of different modes of communication with D2D. Two modes of D2D are compared in terms of their impact on capacity of the network. Also, the leverage of SCeNB on capacity is analyzed. Furthermore, effects of the mobility of D2D users on the network performance are investigated.