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Methods, systems, and computer readable media for mobility management entity (MME) authentication for outbound roaming subscribers using diameter edge agent (DEA)

  • US 10,616,200 B2
  • Filed: 08/01/2017
  • Issued: 04/07/2020
  • Est. Priority Date: 08/01/2017
  • Status: Active Grant
First Claim
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1. A method for authenticating a mobility management entity (MME) for outbound roaming subscribers, the method comprising:

  • maintaining a Diameter authentication information request/update location request (AIR/ULR) mapping database at a Diameter edge agent (DEA), wherein the AIR/VLR mapping database stores mappings between visited public land mobile network identifiers (VPLMN IDs) from Diameter AIR messages and international mobile subscriber identities (IMSIs) obtained from the AIR messages;

    receiving, at the DEA, a first Diameter AIR message for a subscriber;

    determining, by the DEA, that the first Diameter AIR message includes a first IMSI not of record in the AIR/ULR mapping database at the DEA;

    recording, for the subscriber, a VPLMN ID extracted from the first Diameter AIR message in the Diameter AIR/ULR mapping database at the DEA, wherein recording the VPLMN ID extracted from the first Diameter AIR message in the Diameter AIR/ULR mapping database at the DEA includes creating a new record in the Diameter AIR/ULR mapping database at the DEA for the first IMSI and the VPLMN ID;

    receiving, at the DEA, a first Diameter ULR message and reading a VPLMN ID in the first Diameter ULR message;

    determining that the VPLMN ID read from the first Diameter ULR message does not match the VPLMN ID extracted from the first Diameter AIR message and recorded for the subscriber in the Diameter AIR/ULR mapping database at the DEA; and

    in response to determining that the VPLMN ID read from the first Diameter ULR message does not match the VPLMN ID extracted from the first Diameter AIR message and recorded for the subscriber in the Diameter AIR/ULR mapping database at the DEA, rejecting the first Diameter ULR message.

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