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    Understanding Mobile User Types

    There are different types of users in a mobile network. These are distinguished by comparing the home public land mobile network (HPLMN) list configured on the gateway GPRS support node (GGSN) or Packet Data Network Gateway (P-GW) and the PLMNs received from users in headers and control messages.

    Based on a comparison of PLMNs, the mobile user falls into one of three categories:

    • Home user—The subscriber, the GGSN or P-GW, and SSGN or S-GW are all in the same PLMN.
    • Roaming user—The subscriber and GGSN or P-GW belong to the same PLMN, but the SSGN or S-GW are in a different PLMN.
    • Visiting user—The subscriber and SGSN or S-GW belong to the same PLMN, but the GGSN or P-GW are in a different PLMN.

    Published: 2011-11-18