eCMT-SCTP: Improving Performance of Multipath SCTP with Erasure Coding Over Lossy Links

Performance of transport protocols on lossy links is a well-researched topic, however there are only a few proposals making use of the opportunities of erasure coding within the multipath transport protocol context. In this paper, we investigate performance improvements of multipath CMT-SCTP with the novel integration of the on-the-fly erasure code within congestion control and reliability mechanisms. Our contributions include: integration of transport protocol and erasure codes with regards to congestion control; proposal for a variable retransmission delay parameter (aRTX) adjustment; performance evaluation of CMT-SCTP with erasure coding with simulations. We have implemented the explicit congestion notification (ECN) and erasure coding schemes in NS-2, evaluated and demonstrated results of improvement both for application goodput and decline of spurious retransmission. Our results show that we can achieve from 10% to 80% improvements in goodput under lossy network conditions without a significant penalty and minimal overhead due to the encoding-decoding process

What\u27s in a Name: Cable Systems, FilmOn, and Judicial Consideration of the Applicability of the Copyright Act\u27s Compulsory License to Online Broadcasters of Cable Content

The way we consume media today is vastly different from the way media was consumed in 1976, when the Copyright Act created the compulsory license for cable systems. The compulsory license allowed cable systems, as defined by the Copyright Act, to pay a set fee for the right to air television programming rather than working out individual deals with each group that owned the copyright in the programming, and helped make television more widely accessible to the viewing public. FilmOn, a company that uses a mini-antenna system to capture and retransmit broadcast network signals, is now seeking access to the compulsory license. In three concurrent legal cases in New York, California, and D.C., FilmOn argues that it meets the statutory requirements to classify as a cable system. This Issue Brief examines the legal history of cable systems and considers the effects of agency influence, policy concerns, and the lack of judicial or congressional resolution regarding FilmOn’s contested legal status

What\u27s in a Name: Cable Systems, FilmOn, and Judicial Consideration of the Applicability of the Copyright Act\u27s Compulsory License to Online Broadcasters of Cable Content

The way we consume media today is vastly different from the way media was consumed in 1976, when the Copyright Act created the compulsory license for cable systems. The compulsory license allowed cable systems, as defined by the Copyright Act, to pay a set fee for the right to air television programming rather than working out individual deals with each group that owned the copyright in the programming, and helped make television more widely accessible to the viewing public. FilmOn, a company that uses a mini-antenna system to capture and retransmit broadcast network signals, is now seeking access to the compulsory license. In three concurrent legal cases in New York, California, and D.C., FilmOn argues that it meets the statutory requirements to classify as a cable system. This Issue Brief examines the legal history of cable systems and considers the effects of agency influence, policy concerns, and the lack of judicial or congressional resolution regarding FilmOn’s contested legal status

Packet loss characteristics of IPTV-like traffic on residential links

Packet loss is one of the principal threats to quality of experience for IPTV systems. However, the packet loss characteristics of the residential access networks which carry IPTV are not widely understood. We present packet level measurements of streaming IPTV-like traffic over four residential access links, and describe the extent and nature of packet loss we encountered. We discuss the likely impact of these losses for IPTV traffic, and outline steps which can ameliorate this

Congestion-Aware Scalable Video Streaming

Postprin

Reliable Multicast Transport for Heterogeneous Mobile IP environment using Cross-Layer Information

Reliable multicast transport architecture designed for heterogeneous mobile IP environment using cross-layer information for enhanced Quality of Service (QoS) and seamless handover is discussed. In particular, application-specific reliable multicast retransmission schemes are proposed, which are aimed to minimize the protocol overhead taking into account behaviour of mobile receivers (loss of connectivity and handover) and the specific application requirements for reliable delivery (such as carousel, one-to-many download and streaming delivery combined with recording). The proposed localized retransmission strategies are flexible configured for tree-based multicast transport. Cross layer interactions in order to enhance reliable transport and support seamless handover is discussed considering IEEE 802.21 media independent handover mechanisms. The implementation is based on Linux IPv6 environment. Simulations in ns2 focusing on the benefits of the proposed multicast retransmission schemes for particular application scenarios are presented

Design and analysis for TCP-friendly window-based congestion control

The current congestion control mechanisms for the Internet date back to the early 1980’s and were primarily designed to stop congestion collapse with the typical traffic of that era. In recent years the amount of traffic generated by real-time multimedia applications has substantially increased, and the existing congestion control often does not opt to those types of applications. By this reason, the Internet can be fall into a uncontrolled system such that the overall throughput oscillates too much by a single flow which in turn can lead a poor application performance. Apart from the network level concerns, those types of applications greatly care of end-to-end delay and smoother throughput in which the conventional congestion control schemes do not suit. In this research, we will investigate improving the state of congestion control for real-time and interactive multimedia applications. The focus of this work is to provide fairness among applications using different types of congestion control mechanisms to get a better link utilization, and to achieve smoother and predictable throughput with suitable end-to-end packet delay