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Sequence number reuse for CDR transport using GTP'

  • US 9,787,852 B2
  • Filed: 06/04/2014
  • Issued: 10/10/2017
  • Est. Priority Date: 06/04/2014
  • Status: Expired due to Fees
First Claim
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1. An apparatus comprising:

  • a Charging Data Function (CDF) including an interface component configured to communicate with a Charging Gateway Function (CGF) of an offline charging system using GPRS Tunneling Protocol prime (GTP′

    );

    the CDF including a processor that assembles a GTP′

    request for a transaction, assigns a sequence number for the transaction, assigns a timestamp to the sequence number for the duration of the transaction, inserts the sequence number in a GTP′

    header of the GTP′

    request, inserts the timestamp assigned to the sequence number in the GTP′

    header of the GTP′

    request, sends the GTP′

    request to the CGF through the interface component, and stores an entry for the transaction in a send buffer that is referenced by the sequence number and the timestamp;

    the processor receives a GTP′

    response for the transaction from the CGF through the interface component, processes the GTP′

    header of the GTP′

    response to identify the sequence number, processes the GTP′

    header of the GTP′

    response to identify the timestamp assigned to the sequence number, identifies the entry in the send buffer that is referenced by the sequence number and the timestamp, and deletes the entry from the send buffer when the GTP′

    response indicates that the GTP′

    request was accepted by the CGF.

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