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Sequence number calculation and authentication in a communications system

  • US 20030069003A1
  • Filed: 06/20/2002
  • Published: 04/10/2003
  • Est. Priority Date: 10/10/2001
  • Status: Active Grant
First Claim
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1. A method of sequence number generation in a communications system wherein each sequence number comprises a suffix and a prefix, the method comprising calculating a new sequence number suffix from an existing sequence number suffix, calculating a new sequence number prefix by a randomising process if the new suffix is equal to a predetermined value, and calculating a new sequence number prefix by an algorithmic process from the prefix of the existing sequence number if the new suffix differs from said predetermined value.

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