RXLEV_ACCESS_MIN

Value range: 0~63

Unit:  Level

Content: It means the minimum received signal level required for MS to access a cell.

Recommendation: 8

 

To prevent MS from accessing the system when the receiving signal level is very low that makes the satisfying communication quality unavailable and wastes the radio resources of the network, GSM specifications require that when MS needs to register in the network, its receiving level must be greater than a threshold, i.e. the minimum receiving level of MS permitted to access; otherwise MS will fail to access.

For some cells with high traffic, this parameter can be increased appropriately to lower the values of C1 and C2 of this cell. Accordingly the effective coverage range of the cell will be reduced. But the value of RXLEV_ACCESS_MIN should not be too large, otherwise coverage hole  (with regard to idle mode MS) will be created at the edge of the cell. When this method is used to balance the traffic, the value of RXLEV_ACCESS_MIN is recommended to be no more than 20.

Except for the areas with densely distributed BTS and good coverage, generally it is not recommended to use RXLEV_ACCESS_MIN to adjust the traffic of the cell. For isolated BTS or BTS with poor coverage, this value can be increased properly; otherwise the call drop rate will increase and QoS will be affected.