Framework Architecture for Signaling Transport

Ong, Lyndon; Rytina, Ian; Garcia, Miguel; Schwarzbauer, H.; Coene, Lode; Lin, Huei-Yung; Juhasz, I.; Holdrege, Matt; Sharp, Chip

doi:10.17487/rfc2719

Cited by 60 publications

(29 citation statements)

References 4 publications

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“…We have also seen that the implementation in its current state is not able to use reliable transport to fulfil the requirements for signaling traffic that were defined by RFC2719 [17] and avoid error handling by the higher layers. However, advantages such as the maintenance of message boundaries and proactive retransmission by bundling chunks still make SCTP attractive for distributed interactive applications.…”

Section: Enhancementsmentioning

confidence: 99%

“…An alternative to TCP is the Stream Control Transmission Protocol (SCTP) [26], which is developed to meet the requirements for signaling transport identified by RFC2719 [17], and is currently on the standards track of the IETF. The development of applications which support SCTP has up until now focused on transport of signaling data, as may be expected.…”

Section: Introductionmentioning

confidence: 99%

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Improving SCTP retransmission delays for time-dependent thin streams

Petlund

Beskow

Pedersen

et al. 2009

Multimed Tools Appl

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A large number of network services rely on IP and reliable transport protocols. For applications that provide abundant data for transmission, loss is usually handled satisfactorily, even if the application is latency-sensitive (Wang et al. 2004). For data streams where small packets are sent intermittently, however, applications can occasionally experience extreme latencies (Griwodz and Halvorsen 2006). As it is not uncommon that such thin-stream applications are time-dependent, any unnecessarily induced delay can have severe consequences for the service provided. Massively Multiplayer Online Games (MMOGs) are a defining example of thin streams. Many MMOGs (like World of Warcraft and Age of Conan) use TCP for the benefits of reliability, in-order delivery and NAT/firewall traversal. It has been shown that TCP has several shortcomings with respect to the latency requirements of thin streams because of the way it handles retransmissions (Griwodz and Halvorsen 2006). As such, an alternative to TCP may be SCTP (Stewart et al. 2000), which was originally developed to meet the requirements of signaling transport. In this paper, we evaluate the Linux-kernel SCTP implementation in the context of thin streams. To address the identified latency challenges, we propose sender-side only enhancements that reduce the application-layer latency in a manner that is compatible with unmodified receivers. These enhancements can be switched on by applications and are used only when the system identifies the stream as thin. To evaluate the latency performance, we have performed several tests over various real networks and over an emulated network, varying parameters like RTT, packet loss and amount of competing cross traffic. When comparing our modifications with SCTP on Linux and FreeBSD and TCP New Reno, our results show great latency improvements and indicate the need for a separate handling of thin and thick streams.

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Section: Enhancementsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Improving SCTP retransmission delays for time-dependent thin streams

Petlund

Beskow

Pedersen

et al. 2009

Multimed Tools Appl

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“…Many multimedia streams are tolerant with data loss but have strict latency requirements. For these applications completely reliable transport is not necessary and loss recovery mechanism can be cumbersome, as they might force the application to rely on the retransmission timer [79]. On the other hand, UDP is frequently used to provide transport-layer service with a low latency.…”

Section: Partial Reliability Sctp (Pr-sctp)mentioning

confidence: 99%

Consumer-Oriented Incoming Call Connection Service for a Ubiquitous Consumer Wireless World

Ганчев

O’Dróma

Wang

2008

Wireless Pers Commun

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This thesis proposes a novel consumer-oriented Incoming Call Connection (ICC) service as an important enabling infrastructural component of the recently proposed ubiquitous consumer wireless world (UCWW), a new Consumer-centric Business Model (CBM) environment for wireless communications. The ICC solution proposed here will be offered by third-party providers who are autonomous of the access network providers. Compared to the present ICC service in the legacy subscriber-based networks, the consumeroriented ICC service will offer to mobile users greater flexibility and management control over incoming calls, enable users to receive incoming calls via multiple access networks/providers by means of a single identity, support user-driven, seamless, network-transparent Hot Access network Change (HAC), largely eliminate roaming charges and develop a new wireless networking business opportunity among other ben- Furthermore, the thesis elaborates a generic CBM-ICC service scenario, which shows how the CBM-ICC service offers to mobile users greater freedom and operation control over incoming calls, enables the novel attribute of users being empowered to receive incoming calls simultaneously, and otherwise, from various homogeneous and heterogeneous access networks, owned by the same or different providers, and enables user-driven HAC on active calls in keeping with, or matched to, user's Always Best Connected and Best Served (ABC&S) policies. A CBM-ICC proof-of-concept system-level testbed is implemented to perform experimental tests, probe different communications scenarios, evaluate the service performance, and further elaborate the service architecture. In this, approaches towards evaluating the performance of the CBM-ICC service based on designed testbed are elaborated, and sample numerical results are presented and analyzed. DeclarationThis thesis is presented in fulfillment of the requirements for the degree of Doctorate of Philosophy. This thesis has not been submitted to any other University or higher education institution, or for any other academic award in this University. Where use has been made of the work of other people it has been fully acknowledged and fully referenced. Signed:Date:Ohana means family.Family means nobody gets left behind, or forgotten.Dedicated to Mum, Dad and my wife.Without your love and support I would not be at this point today.Dedicated to the loving memory of my grandma.

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“…Within this document a VoIP Media Gateway is a device that converts a (digital or analog) linear data stream to a digital packetized data stream or vice versa. Refer to RFC 2719 [10] for an introduction into the basic architecture of a Media Gateway based network.…”

Section: Introductionmentioning

confidence: 99%

RTP Payload Format for a 64 kbit/s Transparent Call

Kreuter¹

2005

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Framework Architecture for Signaling Transport

Abstract: This document defines an architecture framework and functional requirements for transport of signaling information over IP.

Cited by 60 publications

References 4 publications

Improving SCTP retransmission delays for time-dependent thin streams

Improving SCTP retransmission delays for time-dependent thin streams

Consumer-Oriented Incoming Call Connection Service for a Ubiquitous Consumer Wireless World

RTP Payload Format for a 64 kbit/s Transparent Call

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