A novel queuing model for IMS-based IPTV system

End-to-End Reliability and Optimization of Intra and Inter-Domain IMS-based Communication Networks

“…Over the past decade, various reliability evaluation techniques have been proposed for the IMS system. For example, state-space methods such as Queuing Network Model (QNM) [9][10][11], Queuing Petri Nets (QPN) [12], and the Markov model [8,[13][14][15][16][17] were applied for performance and reliability evaluation of the IMS network. The QNM is normally applied to analyze the processing delay.…”

Security Analysis and Delay Evaluation for SIP - Based Mobile Mass Examination System

“…After registration, the user selects the exam service by sending to the S-CSCF an INVITE message, which is forwarded to the appropriate AS after resolving its destination address [10]. In the INVITE message, a caller sends this message to request that another endpoint join a SIP session such as AS.…”

“…Where C IMS_NODE is the processing cost per IMS node, K' is in function of the unit processing cost value for every entity and the number of packets per request, K is the system dependent constant, R is the ration of the number of bits in the address to the machine word size in bits and N is the number of entries per table [10]. Figure 11 shows the effect of increasing the number of users on the processing time.…”

End-to-End Reliability and Optimization of Intra and Inter-Domain IMS-based Communication Networks

“…For example, state-space methods such as Queuing Network Model (QNM) [9][10][11], Queuing Petri Nets (QPN) [12], and the Markov model [8,[13][14][15][16][17] were applied for performance and reliability evaluation of the IMS network. The QNM is normally applied to analyze the processing delay.…”