A New Approach for Sum Rate Enhancement in Heterogenous Networks
Abstract
The massive increase in capacity and coverage demands pose serious interference and energy management problems on present day cellular mobile Heterogeneous Network (HetNet) bandwidth, which necessitates the need for cellular networks to migrate towards ultra-dense networks. Notably, network densification comes with complex interference management challenge. The interference challenge usually stems from the tight coupling between the control and data planes. A lot of researchers have attempted solving the stated challenges by using cancellation and management technique. However, these techniques were best suited for limited number of users. Consequently, the problem of interference is still inherent in cellular network which results in large decrease in network sum rate. In wake of this demand, this research developed a Sum rate Quality-of-Service Aware control and data plane SARC (QoSA-SARC) algorithm for hierarchical HetNet using D2D clustering and coordinated beamforming. In the work, various interference parameter values of 0.001, 0.01 and 1 were used in the network interference analysis at varying cell user transmission Bits (B). Here, D2D clustering is a communication technique where D2D users are grouped into clusters based on their defined cost functions. While beamforming is a method of antenna transmission that ensures that antenna beams are directionally transmitted toward a defined destination or perimeter. When the interference parameter (alpha) was 0.001, the QoSA-SARC scheme showed a sum rate improvement of 27.78%, 17.24%, 17.82% and 10.70% when B was 18, 12, 6 and 0 respectively when compared with the work of Saini and Kuchi, (2018). Also, when alpha was set to 0.01, the developed scheme showed an improvement of 28.00%, 33.90%, 8.39% and 13.89% when B was 18, 12, 6 and 0 respectively when compared to the Saini and Kuchi, (2018). Furthermore, when alpha was changed to a value of 1, the QoSA-SARC scheme showed an improvement of 28.00%, 33.90%, 8.39% and 13.89% when B was 18, 12, 6 and 0 respectively over the work of Saini and Kuchi, (2018).
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