A thesis submitted in partial fulfillment of the requirement for the degree of Master of Engineering, School of Engineering and Technology

Thesis (M.Eng.) - Asian Institute of Technology,1992

The effect on the performance of introducing Global Title Translation (GTT) into the Signalling System Number 7 (SS?) network is studied. Two models for the Signalling Connection Control Part (SCCP) SS7 protocol layer incorporating GTT are developed . The two models reflect two different possible GTI implementations within the SCCP protocol layer. The models are based on a generic approach to modelling SS7 protocol layers. Mathematical analysis has been done using general M/Gl/ 1 priority queuing models with feedback. Selected equations from the mathematical analysis are verified against simulation. Several quantitative conclusions relating to the performance of SS? networks are drawn from the results. Results show that the location of the GTI function within the SS7 network effects the performance of the network significantly. The effect of introducing GTI also causes a significant degradation in the performance of the Message Transfer Part (MTP). These results and others are useful for serving as general considerations for SS? network design and planning. Moreover, the work done can be extended to higher layer SS7 protocols (such as the Transaction Capabilities Application Part) and used to undertake performance evaluation of other services provided by the SS? network.