I want to know the absolute maximum allowed value by Gx or Diameter for MBR or GBR. I am not finding it in the 3gpp specifications. A reference to the specifications or the values would be helpful.
For an EPS bearer, having a GBR resource type means the bandwidth of the bearer is guaranteed. A GBR type EPS bearer has a "guaranteed bit rate" associated (GBR will be further explained below) as one of its QoS parameters. Only a dedicated EPS bearer can be a GBR type bearer and no default EPS bearer can be GBR type. The QCI of a GBR type EPS bearer can range from 1 to 4.
MBR is used for a GBR type bearer, and indicates the maximum bit rate allowed in the LTE network. Any packets arriving at the bearer after the specified MBR is exceeded will be discarded.