As the number of FTP clients increases, UL traffic requests are also increased when the UL subframe size is set to a fixed value in the fixed scheme.
The central carbon metabolism of all organisms is considered to follow a well established fixed scheme.
From Figure5, it shows that our proposed scheme outperformed the adaptive and fixed scheme while the fixed scheme showed worse performance.
The adaptive scheme shows the worst performance, and the fixed scheme performs slightly better than QDRA.
On the other hand, the fixed scheme and QDRA started increasing significantly when the number of FTP clients reaches 21.
The CCSF model with the fixed scheme is proven to produce the most accurate curvature and lowest parasitic currents among the tested methods.
The traffic parameters for FTP we used for the simulations are shown in Table3.Figure5 shows the throughput of QDRA, adaptive scheme, and fixed scheme, respectively.
As the number of FTP clients reaches 19, throughputs achieved by QDRA, the adaptive scheme, and fixed scheme are 20.4, 19.8, and 19.5 Mbps, respectively.
As expected, the largest increase in average achievable rate is experienced by users that are closest to the cluster borders in the fixed scheme.
Hence, rotation does not change their situation much, and so, their achievable rates do not change appreciably from the fixed scheme either.
In case of the fixed scheme, the UL subframe utilization reached its maximum, and as a result, the UL mean delay increased dramatically.
