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Strategies for Efficient Streaming in Delay-Tolerant Multimedia Applications

Saraswathi Krithivasan, Sridhar Iyer
2006 Eighth IEEE International Symposium on Multimedia (ISM'06)  
We consider Multimedia applications where clients specify a minimum desired stream rate (quality) and a time till when they are willing to wait, termed delay tolerance. The Content Service Provider's (CSP) objective is to service as many clients' requests for the same multimedia content with a single stream while satisfying their requirements. We propose an optimization approach to determine the rates delivered at clients and study three transcoder deployment strategies: i) Source Transcoding
more » ... T): when content encoded at different rates are available only at the source (ii)Anywhere Transcoding (AT): when transcoding capability is available at all intermediate nodes, and (iii)Selected Node Transcoding (SNT): when transcoding capability is available at selected intermediate nodes. Considering the complexity of the optimal solution, we propose a set of heuristic based algorithms for delivering enhanced rates to clients using the three strategies. A practical content dissemination network is used to demonstrate the effectiveness of our strategies. 512 1 384 2 R1 256 3 256 4 R2 128 5 C1 C3 C2 S
doi:10.1109/ism.2006.142 dblp:conf/ism/KrithivasanI06 fatcat:uufxq5nobjemzongkj6zkpsuei

Enhancing quality of service by exploiting delay tolerance in multimedia applications

Saraswathi Krithivasan, Sridhar Iyer
2005 Proceedings of the 13th annual ACM international conference on Multimedia - MULTIMEDIA '05  
doi:10.1145/1101149.1101368 dblp:conf/mm/KrithivasanI05 fatcat:g4k3yl5wj5gmvjm6g7d2gncoqe

Enhancing QoS for Delay-Tolerant Multimedia Applications: Resource Utilization and Scheduling from a Service Provider's Perspective

Saraswathi Krithivasan
2006 Proceedings IEEE INFOCOM 2006. 25TH IEEE International Conference on Computer Communications  
Emerging applications such as distance education and corporate training are examples of delay tolerant multimedia applications where clients request the start of play back at a convenient time specified by (t+d i ) where t is the current time and d i is the delay tolerance acceptable to client i. Such applications typically involve a Closed User Group (CUG) network that exhibits heterogeneous characteristics, where a Content Service Provider (CSP) disseminates multimedia content to
more » ... y dispersed clients. Our research deals with the issue of maximizing quality delivered at the clients while satisfying their delay tolerance with minimal additional resources. As a first step to this end, we have developed an optimization-based approach to determine the best quality that can be delivered to the clients through judicious placement of resources such as buffers and transcoders. Simulation results demonstrate the usefulness of exploiting client delay tolerance specifications for delivering enhanced Quality of Service (QoS) with little or no additional resources. By maximizing QoS to the clients with given resources, CSPs can (1) maximize the utilization of links (2) provide differentiated services to their clients, and (3) offer upgraded services to some clients (which may have a revenue implication). Our ongoing work deals with scheduling and admission control issues which would maximize profits for the CSPs while satisfying the admitted clients' requirements with optimal resource utilization.
doi:10.1109/infocom.2006.71 dblp:conf/infocom/Krithivasan06 fatcat:bu6iyqlyznehdns3gah4uobrmi

HSM [chapter]

Annanda Thavymony Rath, Saraswathi Krithivasan, Sridhar Iyer
Multimedia Transcoding in Mobile and Wireless Networks  
Traditionally, Content Delivery Networks (CDNs) deploy proxy servers at strategic locations at the edge of the network to efficiently serve client requests. With the tremendous growth in multimedia applications and the number of clients accessing such applications, an edge proxy server itself may serve clients connected to it through a multi-hop network of heterogeneous links. Further, a special class of multimedia applications that can tolerate start up delays is emerging. In such
more » ... clients require a minimum acceptable quality (loss-free transmission at a minimum encoded rate r i ) and the start of play back at a specific time (t + d i ) where t is the current time and d i is the delay tolerance acceptable to client i. Our work deals with enhancing performance of such networks through a Hybrid Streaming Mechanism (HSM). In HSM a client's request triggers the selection of an intermediate node as a streaming point to which multimedia contents are dynamically transferred from the proxy/source, and this streaming point streams the contents to the client. Transferred contents are temporarily cached at the streaming point to service future requests for the same content. HSM helps a Content Service Provider's objective of satisfying as many client requests as possible and providing enhanced quality to clients given their delay tolerance. Simulation results demonstrate that by leveraging the delay tolerance of clients, and by combining the dynamic download and streaming mechanisms, HSM performs better than directly streaming from edge servers, serving on an average 40% more client requests.
doi:10.4018/9781599049847.ch011 fatcat:vzph3oquhzd6llkqgi57uhf7fy

HSM [chapter]

Annanda Thavymony Rath, Saraswathi Krithivasan, Sridhar Iyer
Multimedia Transcoding in Mobile and Wireless Networks  
Traditionally, Content Delivery Networks (CDNs) deploy proxy servers at strategic locations at the edge of the network to efficiently serve client requests. With the tremendous growth in multimedia applications and the number of clients accessing such applications, an edge proxy server itself may serve clients connected to it through a multi-hop network of heterogeneous links. Further, a special class of multimedia applications that can tolerate start up delays is emerging. In such
more » ... clients require a minimum acceptable quality (loss-free transmission at a minimum encoded rate r i ) and the start of play back at a specific time (t + d i ) where t is the current time and d i is the delay tolerance acceptable to client i. Our work deals with enhancing performance of such networks through a Hybrid Streaming Mechanism (HSM). In HSM a client's request triggers the selection of an intermediate node as a streaming point to which multimedia contents are dynamically transferred from the proxy/source, and this streaming point streams the contents to the client. Transferred contents are temporarily cached at the streaming point to service future requests for the same content. HSM helps a Content Service Provider's objective of satisfying as many client requests as possible and providing enhanced quality to clients given their delay tolerance. Simulation results demonstrate that by leveraging the delay tolerance of clients, and by combining the dynamic download and streaming mechanisms, HSM performs better than directly streaming from edge servers, serving on an average 40% more client requests.
doi:10.4018/978-1-59904-984-7.ch011 fatcat:a7goweqj4vatll2erw4xkya4hq

Learning while Competing -- 3D Modeling & Design [article]

Kalind Karia, Rucmenya Bessariya, Krishna Lala, Kavi Arya
2019 arXiv   pre-print
Saraswathi Krithivasan, for her valuable inputs in devising the Theme problem statement and storyline. We are grateful to MHRD for funding e-Yantra project.  ... 
arXiv:1905.07644v1 fatcat:l4xmh53ppzf7pmgkyuji4pfa5u