Modelling Traffic in Ims Network Nodes

IMS is well integrated with existing voice and data networks, while adopting many of their key characteristics. The Call Session Control Functions (CSCFs) servers are the key part of the IMS structure. They are the main components responsible for processing and routing signalling messages. When CSCFs servers (P-CSCF, I-CSCF, S-CSCF) are running on the same host, the SIP message can be internally passed between SIP servers using a single operating system mechanism like a queue. It increases the reliability of the network [5], [6]. We have proposed in a last work for each type of service (between ICSCF and S-CSCF (call, data, multimedia.))[23], to use less than two servers well dimensioned and running on the same operating system. Instead dimensioning servers, in order to increase performance, we try to model traffic on IMS nodes, particularly on entries nodes; it will provide results on separation of incoming flows, and then offer more satisfactory service.