QoS Requirements For Multimedia Services

Cacheda, Rafael Asorey; García, Daniel Castro; Cuevas, Antonio; González-Castaño, Francisco J.; Sánchez, Javier Herrero; Koltsidas, Georgios; Mancuso, Vincenzo; Novella, José Ignacio Moreno; Oh, Seoung-Hoon; Panto, A.

doi:10.1007/978-0-387-53991-1_3

Cited by 28 publications

(18 citation statements)

References 13 publications

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“…For audio and video conversations high throughput and a response time less than 150 ms is preferred [39]. From the obtained numerical values it was observed that the RT was less than 150 ms in all the network scenarios with all the security policies.…”

Section: Recommendations For Potential Applicationsmentioning

confidence: 84%

Security-Performance Tradeoffs in a Class of Wireless Network Scenarios

Jindal

Singh

2016

J Netw Syst Manage

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There has been an extensive and widespread deployment of wireless local area networks (WLANs) for information access. The transmission, being of a broadcast nature, is vulnerable to security threats and hence, the aspect of security provisioning in these networks has assumed an important dimension. The security of the transmitted data over a wireless channel aims at protecting the data from unauthorized access. The objective is achieved by providing advanced security mechanisms. Implementing strong security mechanisms however, affects the throughput performance and increases the complexity of the communication system. In this paper, we investigate the security performance of a WLAN based on IEEE 802.11b/g/n standards on an experimental testbed in congested and uncongested networks in a single and multi-client environment. Experimental results are obtained for a layered security model encompassing nine security protocols in terms of throughput, response time, and encryption overhead. The performance impact of transmission control protocol and user datagram protocol traffic streams on secure wireless networks has also been studied. Through numerical results obtained from the testbed, we have presented quantitative and realistic findings for both security mechanisms as well as network performance. The tradeoff between the strength of the security protocol and the associated performance is analyzed through computer simulation results. The present real time analysis enables the network designers to make intelligent choices about the implementation of security features and the perceived network performance for a given application scenario.

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Section: Recommendations For Potential Applicationsmentioning

confidence: 84%

Security-Performance Tradeoffs in a Class of Wireless Network Scenarios

Jindal

Singh

2016

J Netw Syst Manage

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“…The required loss objective of <10 -3 for these classes is an order of magnitude smaller than ours. On the other hand, references [13] and [14] offer loss criteria that are an order of magnitude greater. The exact VoIP application used is not mentioned in [13], but results in Table XI from [14] pertain to Google Talk, Skype, AOL Instant Messenger, and MSN Messenger.…”

Section: Comparison With Results From Bibliography Sourcesmentioning

confidence: 99%

“…On the other hand, references [13] and [14] offer loss criteria that are an order of magnitude greater. The exact VoIP application used is not mentioned in [13], but results in Table XI from [14] pertain to Google Talk, Skype, AOL Instant Messenger, and MSN Messenger. Packet loss rate performance target in G.1010 is somewhat looser than ours (<3% compared to <1%).It is noted in G.1010 that the loss performance targets for audio and video applications depend on specific codecs, but assume use of packet loss concealment.…”

Section: Comparison With Results From Bibliography Sourcesmentioning

confidence: 99%

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Network Performance Criteria for Telecommunication Traffic Types driven by Quality of Experience

Ramadža¹,

Pekić

Ožegović

2019

J. commun. softw. syst. (Online)

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A common reason for changing the chosen service provider is the users' perception of service. Quality of Experience (QoE) describes the end user's perception of service while using it. A frequent cause of QoE degradation is inadequate traffic routing, where, other than throughput, selected routes do not satisfy minimum network requirements for the given service or services. In order to enable QoE-driven routing, per traffic type defined routing criteria are required. Our goal was to obtain those criteria for relevant services of a telecom operator. For the purpose of identifying services of interest, we first provide short results of user traffic analysis within the telecom operator network. Next, our work presents testbed measurements which explore the impact of packet loss and delay on user QoE for video, voice, and management traffic. For video services, we investigated separately multicast delivery, unicast HTTP Live Streaming (HLS), and unicast Real Time Streaming Protocol (RTSP) traffic. Applying a threshold to QoE values, from the measured dependencies we extracted minimum network performance criteria for the investigated different types of traffic. Finally, we provide a comparison with results available in the literature on the topic.

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“…It is important to note that we consider directed edges between nodes and the bandwidth capacity of each edge is randomly taken between 100, 1000 and 10000 Mbps. Moreover, we consider for each service request, a delay threshold ranging from 80 to 250(ms) based on reference [41]. All simulation and network topology parameters are summarized respectively in Table II and III with VNF license cost and site license cost selected from [30].…”

Section: A Experimental Set Upmentioning

confidence: 99%

CPVNF: Cost-Efficient Proactive VNF Placement and Chaining for Value-Added Services in Content Delivery Networks

Dieye

Ahvar

Sahoo

et al. 2018

IEEE Trans. Netw. Serv. Manage.

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Value-added services (e.g., overlaid video advertisements) have become an integral part of today's Content Delivery Networks (CDNs). To offer cost-efficient, scalable and more agile provisioning of new value-added services in CDNs, Network Functions Virtualization (NFV) paradigm may be leveraged to allow implementation of fine-grained services as a chain of Virtual Network Functions (VNFs) to be placed in CDN. The manner in which these chains are placed is critical as it both affects the quality of service (QoS) and provider cost. The problem is however, very challenging due to the specifics of the chains (e.g., one of their end-points is not known prior to the placement). We formulate it as an Integer Linear Program (ILP) and propose a cost efficient Proactive VNF placement and chaining (CPVNF) algorithm. The objective is to find the optimal number of VNFs along with their locations in such a manner that the cost is minimized while QoS is met. Apart from cost minimization, the support for large-scale CDNs with a large number of servers and end-users is an important feature of the proposed algorithm. Through simulations, the algorithm's behavior for small-scale to large-scale CDN networks is analyzed.

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QoS Requirements For Multimedia Services

Cited by 28 publications

References 13 publications

Security-Performance Tradeoffs in a Class of Wireless Network Scenarios

Security-Performance Tradeoffs in a Class of Wireless Network Scenarios

Network Performance Criteria for Telecommunication Traffic Types driven by Quality of Experience

CPVNF: Cost-Efficient Proactive VNF Placement and Chaining for Value-Added Services in Content Delivery Networks

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