Fig. 4

Decision algorithm for \(n_{\mathrm {optimal}}\) and \(m_{\mathrm {optimal}}\). For each picture on the left and right, \(n_{\mathrm {M}}-1\), \(n_{\mathrm {M}}\), \(n_{\mathrm {M}}+1\), \(m_{\mathrm {M}}\mathrm {-}\mathrm {1}\), \(m_{\mathrm {M}}\) and \(m_{\mathrm {M}}+1\) means the Y and X-axis of the environment, respectively. Each rectangle with the value means the common throughput value at the point of these Y and X-axis