The idea of the conventional cellular system is that devices are not permitted to communicate with each other directly, especially, in the licensed bandwidth of the cellular network. The entire communications occur via base stations. This paper includes envisioning about a two-tier cellular network which also implicates a macro-cell tier (Base Station to Communication of Device) and also a device tier (Device to Device Communication). Relay of device terminal makes it possible for those devices which are in network and allow doing function them as transmission of relays. It realizes a massive network of ad-hoc. In these scenarios, the two-tier cellular system maintained security for the privacy just to ensure existing macro-cells of BSs performance’s minimal impact. This network needs a design with some smart strategies, proper resources, and intrusion management. Moreover, models of novel pricing have been smartly designed to tempt those devices to contribute to the communication of such types. This paper gives an overview of such challenges that may arrive in two-tier networks. It also proposes some schemes related to prices for several relay devices.

Device-to-Device Communication, Cellular Network, Ad Hoc, Transmission, base Stations.

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