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Real-time messages, which have user defined end-to-end delay requirements, can be delivered using a real-time communication method. This paper proposes two path selection algorithms for real-time communication and conducts a simulation study to evaluate these two algorithms. On the basis of this simulation study, it can be seen that, for effective real-time communication, it is important to consider the number of hops utilized by each path and the link utilization of all effected links. In particular, the number of hops required for each path was found to be the most important factor. The proposed path selection algorithms are found to perform as well or better than previously proposed algorithms while using fewer network resources.

In this paper we propose a Regional Internet Exchange (RIX) scheme for MENA countries intra-regional traffic, compared with the existing situation for Internet service provision. The RIX architecture is proposed, implemented, and evaluated using simulation. Simultaneous comparative performance evaluation of Internet service provision for the existing and the proposed scenarios are presented. It is focused to measure utilization, message delays, access time and client perceived latencies performance metrics. The study shows that the proposed scheme results in less international bandwidth utilization and it reduces significantly the access time and most importantly it is inherently cost-effective.