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Phase based prioritization of IMS signaling messages for overload throttling

  • US 8,589,498 B2
  • Filed: 04/15/2010
  • Issued: 11/19/2013
  • Est. Priority Date: 04/15/2010
  • Status: Active Grant
First Claim
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1. A method of providing overload protection in a communication system, comprising:

  • determining, in a communication server, whether a communication system overload condition is present in the communication system;

    determining, in the communication server, an importance rating of a first communication session message associated with the communication system, wherein the importance rating for the first communication session message is determined from a phase of the first communication session message in a first communication session, wherein the first communication session message is a Session Initiation Protocol (SIP) INVITE message, and wherein the phase of the first communication session message is determined based on at least two of;

    a SIP INVITE IMSorig message, a SIP INVITE with a Origdone tag, a SIP INVITE with an IMS origdone tag, a SIP INVITE with an Imsterm tag, a SIP INVITE with a termdone tag, and a SIP INVITE with an IMS tag; and

    in response to determining an overload condition and an importance rating for the first communication session message that is less than one of an importance rating of a second communication session message or a first threshold, the communication server applying a throttling procedure to the first communication session.

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