Multi-band Reporting MBR

Multi-band Reporting MBR

 

Value range:  0~3

Unit:  None

Content: Multi-band Reporting. It is used to inform MS to report the adjacent cells in a controllable way. It is sent in the System Information 2ter and 5ter.

 

When the value is “0”, MS will report measurement results of six strongest adjacent cells no matter which band it’s in. When it is “X(X<=3)”, MS will report measurement results of X adjacent cells with the strongest signals  from the same band as the serving cell and X adjacent cells from the different band. If there is still spare locations, it will report adjacent cells from the same band. After this, if there is still space for MR,then, MS will report the other adjacent cells. If there are no special requirements on different bands and the traffics on various bands are basically the same,  “0” is recommended. When the traffics on various bands are obviously different from each other and MS is expected to enter a band preferably,  “3” is preferred. When traffics on various bands are slightly different from each other, “1” or “2” is recommended.

In the initial stage of dual-band network, the traffic of GSM1800 system is very light, usually dual-band MS are expected to work on this band preferably. Therefore, the priority of GSM1800 cells for HO should be higher than these of GSM900 cells and “3” is recommended for MBR.

Note: In the single-band system, system messages 2ter and 5ter should not be used. Therefore, the “multi-band indication” parameter does not exist.

  

Application of MBR

S is a GSM900 cell, cells A~H are adjacent to cell S. Of them, A and B are GSM1800 cells and others are GSM900 cells. The above diagram shows the influences of different MBR parameters as follows:

1)When MBR = 0, MS will report six adjacent cells with strongest signals without considering the bands, the report result is: C, E, B, H, F, D.

2)When MBR = 1, the result is: C, B, E, H, F, D.

3)When MBR = 2, the result is: C, E, B, A, H, F.

4)When MBR = 3, the result is: C, E, H, B, A, F (3 GSM1800 cells should be reported. But there are only 2 currently, so 2 GSM1800 cells are reported. In the rest, GSM900 cells will be reported).