| Notations | Descriptions |
| Nd | Number of preambles detected by eNB |
| Nt | Number of total preambles allocated by eNB |
| Ru | The usage of preamble (Pd/Pt) |
| Ns | Number of success UEs |
| Sf | Sum of CRF flags |
| Rf | Ratio of Sf and Ns (Sf/Ns) |
| C | Total non-anchor carriers |
| M | Maximum number of non-anchor carriers |
| T1, T2, T3 | Thresholds used in the proposed algorithm |