Everything over IP — an overview of the strategic change in voice and data networks

Abstract

This paper investigates the changes that are required in networking technology for 'everything over IP' to become a reality. Initially the changes that are taking place in the telecommunications industry are reviewed. This review ranges from a discussion about the companies installing massive global IP networks to the emergence of novel routeing technologies, e.g. multi-protocol label switching (MPLS) and terabit router technologies. The role of existing telecommunications operators is then discussed, along with the reasons why they are developing interworking and intelligence layers based on distributed computing principles to support all their networks -mobile, fixed, broadband and IP.

The Experimental Practices of VoIP Based on the Commercial Softswitch Device

“…Fig1 shows that the separations of the services from the control and the control from the transport make the services independent of networks. A softswitch is the central device of the NGN in the VoIP system [6][7]. Huawei SoftX3000 was chosen as the softswitch here, works at the Control Layer of the NGN to mainly complete Call Control of voice, data and multimedia service based on IP protocols, connection management, and other functions.…”

Modeling and analysis of WAP performance over wireless links

“…Since the phase-II transmission process can start in any of initial states {(1,1), (1,2), (1,3)}, instantaneous transitions, which randomly place the transmission process in any of transient states, are considered. If the transmission process is in state (a, i) at the beginning of the cycle (beginning of phase-I), the probability of the transmission process to be in state (1,c) at the beginning of phase-II (end of phase-I) equals to a (a-1)-step transition probability from the channel state i to the channel state c, i.e., p i,c (a-1).…”

“…Over the last decade, the Internet has been growing tremendously as evidenced by the access demand increase at the rate of 1000% per year [1]. According to Computer Industry Almanac [2], the number of worldwide Internet users surpassed 530 million in 2001 and will continue to grow strongly in the next four years.…”