Packet Loss Characteristics of IPTV-Like Traffic on Residential Links

Ellis, Martin; Perkins, Colin

doi:10.1109/ccnc.2010.5421735

Cited by 8 publications

(3 citation statements)

References 9 publications

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“…Ellis et al [8] carried out experiments to characterize IPTV-lite traffic on residential links. The findings grouped packet loss in congestive and non-congestive losses, it was observed that congestive losses are the major cause of quality degradation and normally occur in bursts after queue overflow.…”

Section: Related Workmentioning

confidence: 99%

Feedback-Free Early VoIP Quality Adaptation Scheme in Next Generation Networks

Mkwawa

Jammeh

Sun

et al. 2010

2010 IEEE Global Telecommunications Conference GLOBECOM 2010

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The Next Generation Networks (NGNs) were proposed to provide ubiquitous access to multimedia services over the Internet. With the best effort nature of the Internet, the quality of real time multimedia services such as voice and video can rapidly degrade due to network impairments.In this paper, we propose a novel feedback-free Early VoIP Quality Adaptation Scheme (EVQAS) which can adapt voice send bit rate (e.g. Adaptive Multi-Rate (AMR) codec mode) automatically according to the buildup of queuing delay in the network. This differs from existing adaptation methods which adapt send bit rate according to either packet loss information or Perceived Quality of Service (PQoS) metrics (e.g. Mean Opinion Score (MOS) ) derived from packet loss and delay. The proposed scheme can avoid congested packet loss which has an obvious impact on perceived voice quality. We implemented this adaptation mechanism in open Android mobile and tested in Open IMS Core testbed. Preliminary results show that the early adaptation mechanism can effectively release congestion before packet loss occurs. This has increased overall perceived voice quality when compared with existing adaptation method. This lightweight feedback-free early adaptation mechanism can be easily applied to other mobile devices to improve VoIP quality in current NGN VoIP applications.

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Section: Related Workmentioning

confidence: 99%

Feedback-Free Early VoIP Quality Adaptation Scheme in Next Generation Networks

Mkwawa

Jammeh

Sun

et al. 2010

2010 IEEE Global Telecommunications Conference GLOBECOM 2010

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“…In addition, frequent update of encryption keys is desired to avoid unauthorized data sharing due to illegal key extracting. Although the data encryption is a well-designed technique 2 International Journal of Digital Multimedia Broadcasting in protecting sensitive data, its efficacy in IPTV environment can be affected based on the IP delivery characteristics such as packet loss [5,6]. In order to protect the multimedia stream against transmission errors/losses, forward error correction (FEC) deliberately produces redundant data to enable the reconstruction of any multimedia packets which are lost during transmission.…”

Section: Introductionmentioning

confidence: 99%

Secure and Reliable IPTV Multimedia Transmission Using Forward Error Correction

Shih

Wang

2012

International Journal of Digital Multimedia Broadcasting

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With the wide deployment of Internet Protocol (IP) infrastructure and rapid development of digital technologies, Internet Protocol Television (IPTV) has emerged as one of the major multimedia access techniques. A general IPTV transmission system employs both encryption and forward error correction (FEC) to provide the authorized subscriber with a high-quality perceptual experience. This two-layer processing, however, complicates the system design in terms of computational cost and management cost. In this paper, we propose a novel FEC scheme to ensure the secure and reliable transmission for IPTV multimedia content and services. The proposed secure FEC utilizes the characteristics of FEC including the FEC-encoded redundancies and the limitation of error correction capacity to protect the multimedia packets against the malicious attacks and data transmission errors/losses. Experimental results demonstrate that the proposed scheme obtains similar performance compared with the joint encryption and FEC scheme.

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“…Hohlfeld et al [34] provide a model to simulate packet loss packets based on Markov chains whose parameters are computed from session capture logs. Ellis and Perkins [14] characterize the packet losses in residential access networks (cable and ADSL), performing an intensive study of packet loss rates in 4 cable and 1 ADSL links, at several bitrates (1-4 Mbps). Most sequences had an error rate lower than < 1%.…”

Section: Other Topics Related To Qoe In Iptv Servicesmentioning

confidence: 99%

Analysis, monitoring, and management of quality of experience in video delivery services over IP

García¹

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TESIS DOCTORAL ANALYSIS, MONITORING, AND MANAGEMENT OF QUALITY OF EXPERIENCE IN VIDEO DELIVERY SERVICES OVER IP by Pablo Pérez García This thesis proposes a comprehensive approach to the monitoring and management of Quality of Experience (QoE) in multimedia delivery services over IP. It addresses the problem of preventing, detecting, measuring, and reacting to QoE degradations, under the constraints of a service provider: the solution must scale for a wide IP network delivering individual media streams to thousands of users.The solution proposed for the monitoring is called QuEM (Qualitative Experience Monitoring). It is based on the detection of degradations in the network Quality of Service (packet losses, bandwidth drops. . . ) and the mapping of each degradation event to a qualitative description of its effect in the perceived Quality of Experience (audio mutes, video artifacts. . . ). This mapping is based on the analysis of the transport and Network Abstraction Layer information of the coded stream, and allows a good characterization of the most relevant defects that exist in this kind of services: screen freezing, macroblocking, audio mutes, video quality drops, delay issues, and service outages. The results have been validated by subjective quality assessment tests. The methodology used for those test has also been designed to mimic as much as possible the conditions of a real user of those services: the impairments to evaluate are introduced randomly in the middle of a continuous video stream.Based on the monitoring solution, several applications have been proposed as well: an unequal error protection system which provides higher protection to the parts of the stream which are more critical for the QoE, a solution which applies the same principles to minimize the impact of incomplete segment downloads in HTTP Adaptive Streaming, and a selective scrambling algorithm which ciphers only the most sensitive parts of the media stream. A fast channel change application is also presented, as well as a discussion about how to apply the previous results and concepts in a 3D video scenario.

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Packet Loss Characteristics of IPTV-Like Traffic on Residential Links

Cited by 8 publications

References 9 publications

Feedback-Free Early VoIP Quality Adaptation Scheme in Next Generation Networks

Feedback-Free Early VoIP Quality Adaptation Scheme in Next Generation Networks

Secure and Reliable IPTV Multimedia Transmission Using Forward Error Correction

Analysis, monitoring, and management of quality of experience in video delivery services over IP

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