A New Static Resource and Bandwidth Utilization Approach Using Wimax 802.16e Fractional Frequency Reuse Base Station

This paper proposed a new Static Resource Assignment (SRA) approach to enhance resource and bandwidth utilization in traditional Fractional Frequency Reuse (FFR) WiMAX Base Station (BS) which widely used in cellular network deployment to overcome the inter-cell interference. The new SRA FFR efficiently tackled the wastage of resources and bandwidth in traditional FFR. The work aimed to enhance the resource exploitation in the downlink subframe of WiMAX BS by using Partial Usage of Sub-channel (PUSC) mode and Orthogonal Frequency Division Multiple Access (OFDMA). Four cases were designed modeled as a trade-off study to specify the best way of exploiting BS resources in traditional FFR technique. Quantitative measurements (Case 1 and Case 3) illustrated that the SRA FFR model had an advantage over traditional FFR technique in various metrics, where the study concluded with two optimal solutions: The number of served users and slots utilization are reached to 87.77% and 85.89% respectively of the full DL subframe capacity when Case 3 is considered. In contrast, the data rate (8.611 Mbps), subcarrier efficiency (3.210 b/subcarrier/burst), and spectral efficiency (1.395 bps) were improved more when Case 1 was applied. The spectral efficiency increased more than twice in SRA FFR that due to exploitation all the available BW in DL subframe. The new SRA FFR succeeded in solving the problems related to user’s rejection as a result of a lack of resources and inefficient use of the bandwidth in cellular network. Therefore it can be considered a strong candidate in cellular networks deployment.