A Security Situation Prediction Algorithm Based on HMM in Mobile Network

Algorithm 2

Period analysis algorithm.

Input: the alarm sequence generated by triple <Signature, srcIP, dstIP>

Output: alarm removal rule <Signature,srcIP,dstIP>

(1) select an alarm sequence generated by a triple;

(2) determine the autocorrelation sequence ;

(3) while

(4) calculate the energy value of frequency ;

(5) endwhile

(6) calculate the frequency with the maximum energy;

(7) calculate the cycle of alarm sequence;

(8) calculate the value of F;

(9) if ()

(10) generate the alarm removal rule <Signature,srcIP,dstIP>;

(11) Endif