Skype Video congestion control: An experimental investigation

Cicco, Luca De; Mascolo, Saverio; Palmisano, Vittorio

doi:10.1016/j.comnet.2010.09.010

Cited by 38 publications

(20 citation statements)

References 17 publications

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“…This confirms that the receiver-side delay-based controller works as expected, i.e. it decreases the rate when an increase of the queuing time is sensed, thus limiting the sending rate according to (2). Moreover, since the algorithm only reacts to queuing delay variations on the forward path, the measured metrics do not depend significantly on the RT Tm.…”

Section: One Gcc Flow Over a Bottleneck With Constant Available Bandwsupporting

confidence: 76%

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Experimental investigation of the google congestion control for real-time flows

Cicco

Carlucci

Mascolo

2013

Proceedings of the 2013 ACM SIGCOMM Workshop on Future Human-Centric Multimedia Networking

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Enabling real-time communication over the Internet is of ever increasing importance due to the use of Internet for audio/video communication. The RTCWeb IETF working group has been established with the goal of standardizing a set of protocols for inter-operable real-time communication among Web browsers. In this paper we experimentally evaluate the Google Congestion Control (GCC) which has been recently proposed in the RTCWeb IETF WG. By setting up a controlled testbed, we have evaluated to what extent GCC flows are able to track the available bandwidth, while minimizing queuing delays, and fairly share the bottleneck with other GCC or TCP flows. We have found that the algorithm works as expected when a GCC flow accesses the bottleneck in isolation, whereas it is not able to provide a fair bandwidth utilization when a GCC flow shares the bottleneck with either a GCC or a TCP flow.

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Section: One Gcc Flow Over a Bottleneck With Constant Available Bandwsupporting

confidence: 76%

“…An evaluation of these applications can be found in [14]. In [2,3] it has been shown that both Skype VoIP and Skype Video employ a congestion control algorithm which adjusts the sending rate to match the time varying network bandwidth.…”

Section: Introduction and Related Workmentioning

confidence: 99%

Experimental investigation of the google congestion control for real-time flows

Cicco

Carlucci

Mascolo

2013

Proceedings of the 2013 ACM SIGCOMM Workshop on Future Human-Centric Multimedia Networking

Self Cite

View full text Add to dashboard Cite

show abstract

“…Finally, Skype traffic is well studied and traffic characteristics have been reported by several researchers, making it relatively easy to model. According to [39,40], it dynamically adapts its sending rate to the network conditions, with a frame rate per second going from 5 frames/s to 30 frames/s and a video bit rate from 30 Kbit/s to 950 Kbit/s.…”

Section: Video Streamingmentioning

confidence: 99%

Is multi-path transport suitable for latency sensitive traffic?

et al. 2016

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This paper assesses whether multi-path communication can help latency-sensitive applications to satisfy the requirements of their users. We consider Concurrent Multi-path Transfer for SCTP (CMT-SCTP) and Multi-path TCP (MPTCP) and evaluate their proficiency in transporting video, gaming, and web traffic over combinations of WLAN and 3G interfaces. To ensure the validity of our evaluation, several experimental approaches were used including simulation, emulation and live experiments. When paths are symmetric in terms of capacity, delay and loss rate, we find that the experienced latency is significantly reduced, compared to using a single path. Using multiple asymmetric paths does not affect latencyapplications do not experience any increase or decrease, but might benefit from other advantages of multipath communication. In the light of our conclusions, multi-path transport is suitable for latency-sensitive traffic and mature enough to be widely deployed.

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“…Cicco et al [5] measured the responsiveness of Skype video calls to bandwidth variations. They conclude that Skype's response time to bandwidth increase is too long.…”

Section: Related Workmentioning

confidence: 99%

Video Telephony for End-Consumers: Measurement Study of Google+, iChat, and Skype

et al. 2014

IEEE/ACM Trans. Networking

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Video telephony requires high-bandwidth and low-delay voice and video transmissions between geographically distributed users. It is challenging to deliver high-quality video telephony to end-consumers through the best-effort Internet. In this paper, we present our measurement study on three popular video telephony systems on the Internet: Google+, iChat, and Skype. Through a series of carefully designed active and passive measurements, we are able to unveil important information about their key design choices and performance, including application architecture, video generation and adaptation schemes, loss recovery strategies, end-to-end voice and video delays, resilience against random and bursty losses, etc. Obtained insights can be used to guide the design of applications that call for high-bandwidth and low-delay data transmissions under a wide range of "best-effort" network conditions.

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Skype Video congestion control: An experimental investigation

Cited by 38 publications

References 17 publications

Experimental investigation of the google congestion control for real-time flows

Experimental investigation of the google congestion control for real-time flows

Is multi-path transport suitable for latency sensitive traffic?

Video Telephony for End-Consumers: Measurement Study of Google+, iChat, and Skype

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