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System and method for managing VoLTE session continuity information using logical scalable units

  • US 10,063,443 B2
  • Filed: 03/04/2016
  • Issued: 08/28/2018
  • Est. Priority Date: 05/29/2012
  • Status: Active Grant
First Claim
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1. A method of communicating messages in a communication system, comprising:

  • receiving at least one of an Authentication Authorization Request (AAR) message or a Session Termination Request (STR) message from a first client component, wherein the received message was sent in response to the first client component determining that a user equipment set-up, modified, or terminated a VoLTE call;

    extracting first information from the received message, and using the extracted first information to obtain a common key;

    using the obtained common key to;

    identify an application component, andretrieve session continuity information from a cache memory, wherein the session continuity information includes at least one of Gx session information, a session continuation (SC) parameter, or a VoLTE-Session-Continuity Attribute-Value-Pair (AVP);

    generating an updated AAR or STR message that includes the retrieved session continuity information and sending the updated message to the identified application component;

    receiving an Authentication Authorization Answer (AAA) message or an Session-Termination-Answer (STA) message from the identified application component and forwarding the received message to the first client component;

    receiving a Re-Authorization Request (RAR) message that includes updated session continuity information from the identified application component, extracting second information from the received RAR message, and determining the common key based on the extracted second information;

    using the determined common key to identify the cache memory that stores the session continuity information;

    updating the information stored in the identified cache memory based on the updated session continuity information included in the RAR message; and

    sending the received RAR message to a second client component.

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