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The newly arrived Software Defined Network (SDN) has been adapted to industry standards. By defining Software Defined Air Interface (SDA) would support achieving higher data rate and utilization of bandwidth. The growing use of internet in industrial sector has claimed higher bandwidth conditions. To provide sufficient bandwidth support for the industrial networks, the fifth generation network has been emerged. The industrial sector utilizes the internet communication for variety of purpose where the bandwidth of the connections needs higher values. They involve in accessing different resources located in different geographic location where the latency of communication should be less and they need to transfer huge amount of data which requires higher bandwidth conditions. However, the increased growth of internet usage has introduced huge challenge for the service providers in handling higher data rate solutions. However different opinions are generated toward 5G network design, still there is no blue print has been arrived. Towards the growth of 5G networks and for the improved performance of data rate maintenance, a novel software defined air interface has been proposed in this paper. The presence of macro cells and small cells supports the higher data rate. Each small cell has been fabricated with number of MIMO which is located in different locations of the network in dense. The software defined interface is capable of selecting optimal macro station or small cell for betterment of data transmission. The interface designed monitor the network conditions and estimates bandwidth utilization support (BUS) and data rate maintenance support (DMS) for different small cells located in different geographic location. The SDA designed is responsible for the selection of small cell, MIMO to maintain the data rate. The proposed method improves the performance of bandwidth utilization and data rate maintenance.