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In general, the Stream Control Transmission Protocol (SCTP) delays the sending of acknowledgments. For specific cases, this results in non-optimal protocol behavior. Therefore, the protocol specification defines several exceptions that allow the receiver of an SCTP packet containing user data to send the corresponding acknowledgment without delaying it. However, all these exceptions only take the...
This article describes requirements and fundamental technologies to enable the provision of a new generation network beyond the Internet and the next generation network, both of which are based on IP protocols. Although the Internet has grown into a social infrastructure and the NGN will replace legacy telephone networks and cellular phone networks in the near future, it is time to start R&D on...
Over the past decade, Voice over IP (VoIP) has revolutionalized the telecommunications industry. VoIP has become more prevalent than ever, and consequently more users have switched to IP-based data networks for their telephone use from the analogue Public Switched Telephone Network (PSTN). One challenge, though, is to secure and protect these VoIP connections. In this paper, we investigate a new approach...
Mitigating the effects of head-of-line blocking (HoLB) was one of the major reasons the IETF SIGTRAN working group developed SCTP, a new transport protocol for PSTN signaling traffic, in the first place. However, studies of the impact of HoLB blocking on TCP and SCTP have given ambiguous results as to whether HoLB has, in fact, any significantly deteriorating effect on transmission delay. To this...
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