Internet protocol support for telephony

Maresca, Massimo; Zingirian, N.; Baglietto, Pierpaolo

doi:10.1109/jproc.2004.832950

Cited by 10 publications

(7 citation statements)

References 23 publications

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“…Nevertheless, their design philosophy, network architecture, and security assumptions are coined by the classical public switched telephone networks (PSTN), which differ fundamentally from the Internet [6]. These networks are under full operator control and deliver well-defined services, using a highly stateful application-layer control plane (Fig.…”

Section: Firewalls In Ip Telephony Platformsmentioning

confidence: 99%

Modeling and performance evaluation of transport protocols for firewall control

Kiesel

Scharf

2007

Computer Networks

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Firewalls are a crucial building block for securing IP networks. The usage of out-ofband signaling protocols such as SIP for IP telephony and multimedia applications requires a dynamic control of these firewalls and imposes several challenges. Recently, several firewall control architectures and protocols have been developed. The main focus of this paper is the Simple Middlebox Configuration Protocol (SIMCO), which is a new transactionbased firewall control protocol. Due to the impact on call setup delays, firewall signaling requires small end-to-end delays and thus mandates a careful choice of the transport protocol. Therefore, this paper studies SCTP, TCP and UDP-based transport for SIMCO and compares different configurations that allow to optimize the performance. We present an analytical model to quantify the impact of head-of-line blocking in SCTP and TCP and verify it with measurements. Both the model and measurements reveal that SCTP can significantly reduce the SIMCO response times by leveraging transmission over multiple parallel streams. While already a few SCTP streams can almost completely avoid headof-line blocking, our results show that TCP-and UDP-based transport may suffer from significantly larger delays.

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Section: Firewalls In Ip Telephony Platformsmentioning

confidence: 99%

Modeling and performance evaluation of transport protocols for firewall control

Kiesel

Scharf

2007

Computer Networks

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“…This last clarification is of an extreme importance and allows Maresca et al (2004) to differentiate between two different approaches, which they call the 'telephone philosophy' and the 'Internet philosophy', that share the use of IP, but aim at different objectives:…”

Section: The Evolution Of Voipmentioning

confidence: 99%

“…Stressing the idea of the difficulties in replacing traditional telephony, Maresca et al (2004) refer to the existence of 'subtle aspects' that strengthen the apathy when faced with changes. Several of what they call 'legacy dimensions' have a direct impact on consumer decisions: -User interface: Generations of users have so far accessed the telephone service through a well-known interaction paradigm with terminals; actions such as hanging up or dialling and conventional signals such as ringing or free/busy tones are universally accepted.…”

Section: The Evolution Of Voipmentioning

confidence: 99%

VoIP at the crossroads: A critical overview of feasible European regulatory models

Feijóo

Gómez-Barroso

Ramos

et al. 2007

Information & Communications Technology Law

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After some previous commercial failures, VoIP (Voice over Internet Protocol) is returning to the foreground. The importance of the success of VoIP is obvious, especially when one considers the boost it represents to broadband technologies. However, the progress of VoIP is conditioned by the regulatory framework designed for it. This article reviews the evolution of VoIP. It then studies the circumstances required for it to replace traditional telephony, both from the demand and supply perspectives. Finally, it analyses five main VoIP development scenarios that represent an adjustment of the specific regulatory intervention in basic issues such as interconnection, numbering, operator obligations and user rights.

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“…The system was initially rolled out across the academic and military communities in 1983 with the first commercial Internet services emerging in 1989 after the connection of the Internet to commercial e-mail services and by 1993 the WWW acquired wide commercial acceptance [1]. It is important to mention that Vinton Cerf, the father of the IP family, mentions also VoIP as the next key milestone in the Internet era: by 2003, VoIP services spread quite widely following its commercial introduction around 1995.…”

Section: Introduction a Brief Telecommunications Historymentioning

confidence: 99%

IMS: The New Generation of Internet-Protocol-Based Multimedia Services

et al. 2013

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| Legacy networks, both fixed and mobile, which were originally designed for voice communications, are progressively migrating to new infrastructures that promise to revolutionize the services offered. In this paper, we will cover this new generation of personal communication services, with an emphasis on the family of Internet protocol (IP)-based multimedia subsystem (IMS)-aided infrastructure that relies on the session initiation protocol (SIP). As a benefit, the end users will enjoy a new generation of personal communications services that are accessible anywhere and anytime. These services are directly related to the end users rather than to their diverse devices. It is anticipated that the new deployments of nextgeneration networks (all-IP based) will accelerate the adoption of the IMS technology.

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Internet protocol support for telephony

Abstract: In this paper, we consider the evolution of telephone networks from time-division multiplexing circuit switching to packet switching and, in particular, to packet switching-based on Internet Protocol (IP-supported telephony

Cited by 10 publications

References 23 publications

Modeling and performance evaluation of transport protocols for firewall control

Modeling and performance evaluation of transport protocols for firewall control

VoIP at the crossroads: A critical overview of feasible European regulatory models

IMS: The New Generation of Internet-Protocol-Based Multimedia Services

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