BG: |
The Border Gateway or BG is a network element within
the GPRS core network. As the figure below shows, the BG provides for Inter-PLMN transactions, that is, when subscribers are roaming outside
their Home-PLMN. Major functions of the BG evolve around security and message screening (firewall functionality). As such, two issues need to be considered:
The BG doesn't need to be a separate network element but can be integrated within one SGSN or one GGSN. [2GTS 03.60 / 3GTS 23.060] |