Control of Computing and Communication Systems Lab

The Control of Computing and Communication Systems lab focuses on the analysis and control of network systems. Example of applications are: adaptive video streaming, Web real time communication WebRTC, control and orchestration of CDN, Server overload control, SIP overload control, TCP congestion control. Control of such systems involves: non linear control, switching control, time-delay system control, optimal control, robust control.


We are looking for graduates, PhDs, and PostDocs to conduct research in the context of the project PLATform for INnOvative services in future internet. Click here for more details on the positions.

2013 March Cisco Award dal titolo: Architecture for Robust and Efficient Control of Dynamic Adaptive Video Streaming over HTTP.
Principal Investigator: S. Mascolo
Finanziato dal fondo "Cisco University Research Program" amministrato dalla Silicon Valley Community Foundation
La ricerca riguarda lo studio di nuovi sistemi di controllo per la distribuzione di video su Internet con qualità che si adatta automaticamente alla connessione e al dispositivo dell’utente.

Cisco award entitled: Architecture for Robust and Efficient Control of Dynamic Adaptive Video Streaming over HTTP.
Principal Investigator: S. Mascolo
Funded by "Cisco University Research Program" managed by the Silicon Valley Community Foundation

The research aims at studying new control systems for video distribution over the Internet which automatically adapt video quality to the user's connection and device.</div>

Research Topics Research Projects
  • "Architecture for Robust and Efficient Control of Dynamic Adaptive Video Streaming over HTTP." - Cisco Award (CG #574954) March 2013 .
  • "PLATform for INnOvative services in future internet" PON PLATINO, 2012-2015, funded by MIUR
  • "RES Novae" (Reti, Edifici, Strade - nuovi obiettivi virtuosi per l'ambiente e l'energia), 2012-2015, funded by MIUR
  • "End-to-end protocols for video over IP", 2008-2009, funded by Financial Tradeware plc
  • "End-to-End protocols for audio/video over Internet protocol", 2005-2006, funded by Financial Tradeware plc
  • TCP Westwood+ This protocol was an outcome of the TANGO project
  • Cost 290
  • WIP (Wireless Internet Protocol)


2014 March

  • H. Lundin, S. Holmer, H. Alvestrand, L. De Cicco, and S. Mascolo
    A Google Congestion Control Algorithm for Real-Time Communication
    IETF draft RMCAT wg, draft-alvestrand-rmcat-congestion-02, Feb 2014 (Web: Link)

2013 Nov Our adaptive video streaming platform is used by:

2013 June 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.

  • L. De Cicco, G. Carlucci, and S. Mascolo
    Experimental Investigation of the Google Congestion Control for Real-Time Flows
    ACM SIGCOMM 2013 Workshop on Future Human-Centric Multimedia Networking, Hong Kong, China, Aug 2013 (PDF)

2013 March In this paper, we present a model of the automatic video stream-switching employed by Akamai along with a description of the client-side communication and control protocol. From the control architecture point of view, the automatic adaptation is achieved by means of two interacting control loops having the controllers at the client and the actuators at the server: one loop is the buffer controller, which aims at steering the client playout buffer to a target length by regulating the server sending rate; the other one implements the stream-switching controller and aims at selecting the video level. A detailed validation of the proposed model has been carried out through experimental measurements in an emulated scenario.

  • L. De Cicco and S. Mascolo
    An Adaptive Video Streaming Control System: Modeling, Validation, and Performance Evaluation
    IEEE/ACM Transaction on Networking, in press (PDF)

IEEE explore link

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