DETECTION OF LOOPS WITHIN A SIP SIGNALLING PROXY
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United States of America Patent
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Issued Date -
Dec 20, 2007
app pub date -
Jun 13, 2007
filing date -
Jun 16, 2006
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
SIP Proxy comprising a loop detection mechanism (LD) consisting of calculating a signature for an incoming signalling message from a set of parameters for said incoming signalling message, and detecting a loop by comparing this signature with values inserted in a particular parameter of the incoming signalling message, characterised in that said sending means (EMS) insert the signature in the particular parameter of the outgoing signalling message (ms) corresponding to the incoming signalling message (me). It is applicable to IMS ('Internet Multimedia Subsystem') type communication architectures.
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